Dental system, appliance, orthodontic system designing method, forming method, apparatus, electronic device, and storage medium

Abstract

Disclosed in the present invention is a dental system, comprising two appliances corresponding to an N-th orthodontic treatment step and an (N+M)-th orthodontic treatment step, wherein N and M are both positive integers; each appliance comprises an occlusal plate structure connected to maxillary and mandibular arches; each occlusal plate structure comprises first portions arranged corresponding to maxillary teeth, and second portions arranged corresponding to mandibular teeth; when the occlusal plate structure is connected to the maxillary and mandibular arches, the first portions and the second portions abut against each other to form abutting surfaces; the two occlusal plate structures corresponding to the two appliances have different parameters; and the different parameters are configured to generate different acting forces and / or different torque when the occlusal plate structures are connected to the maxillary and mandibular arches. Different parameters of the present invention can enable two appliances to generate different acting forces and / or different torque, thereby satisfying orthodontic treatment requirements of different orthodontic treatment steps by means of the different acting forces and / or different torque.

Description

Dental systems, orthodontic appliances, design methods, molding methods, devices, electronic equipment, and storage media for orthodontic systems.

[0001] This application claims Chinese patent applications filed on November 29, 2024, with application number 202411745964.9 and title "Dental System"; Chinese patent applications filed on November 29, 2024, with application number 202422945595.X and 202422947112.X and title "Orthodontic Components"; and Chinese patent applications filed on November 29, 2024, with application number 202... Priority is given to Chinese Patent Application No. 411745469.8, entitled "Dental Components", filed on November 29, 2024, application number 202422945702.9, entitled "Dental Components", filed on November 29, 2024, application number 202411751478.8, entitled "Design Method, Molding Method, Apparatus, Electronic Device, Storage Medium and Orthodontic System", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of orthodontic technology, and in particular to a dental system, orthodontic appliance, design method of orthodontic system, molding method, device, electronic device, and storage medium. Background Technology

[0003] In orthodontic treatment, multiple successive braces are typically required, for example, more than 20, or even more than 40. In some cases, at a certain stage of orthodontic treatment, it is necessary to achieve intrusion, labial inclination, lingual inclination, etc. In such cases, a jaw plate structure needs to be placed on the multiple successive braces corresponding to that stage.

[0004] In existing technologies, the jaw plate structure is simple and cannot meet the orthodontic needs at various stages. Summary of the Invention

[0005] The purpose of this invention is to provide a dental system that helps to provide a personalized jaw structure for each orthodontic step.

[0006] This invention provides a dental system comprising two orthodontic appliances corresponding to the Nth and N+Mth orthodontic steps, where N and M are both positive integers. Each appliance includes a jaw plate structure connecting the upper and lower jaws. The jaw plate structure includes a first part corresponding to the upper teeth and a second part corresponding to the lower teeth. When the jaw plate structure connects the upper and lower jaws, the first part and the second part abut against each other to form an abutment surface. The two jaw plate structures corresponding to the two appliances have different parameters, which are configured such that when the jaw plate structure connects the upper and lower jaws, the different parameters generate different forces and / or different torques.

[0007] This invention provides a dental system comprising two orthodontic appliances corresponding to the Nth and N+Mth orthodontic steps, where N and M are both positive integers. Each appliance includes a jaw plate structure connecting the upper and lower jaws. The jaw plate structure includes a first part corresponding to the upper teeth and a second part corresponding to the lower teeth. When the jaw plate structure connects the upper and lower jaws, the first part and the second part abut against each other to form an abutment surface. The two jaw plate structures of the two appliances have different parameters, including at least one of the following: the setting position of the jaw plate structure, the shape of the abutment surface, the position of the contact point formed by the abutment surface, and the direction of the line of action passing through the contact point. The setting position of the jaw plate structure is defined as the installation position of the jaw plate structure within the installation gap, and the installation gap is the gap formed between the upper and lower jaws for installing the jaw plate structure. The shape of the abutment surface includes at least one of the following: the geometry of the abutment surface and the extension direction of the abutment surface. The position of the contact point is defined as the spatial position of the geometric center or force center of the abutment surface within the installation gap.

[0008] This invention provides an orthodontic appliance, including a first protrusion structure disposed on the labial or buccal side or lingual side corresponding to a first dentition. The first protrusion structure is configured such that when the first protrusion structure abuts against the opposing second dentition, a target occlusal position is formed, the target occlusal position deviates from the initial occlusal position, and the occlusal force corresponding to the target occlusal position is greater than the initial occlusal force corresponding to the initial occlusal position.

[0009] This invention provides an orthodontic appliance, comprising a first portion disposed on the lingual or incisal side of the maxillary anterior teeth and a second portion disposed on the labial or incisal side of the mandibular anterior teeth. The first portion and the second portion are configured such that when the maxilla and mandible occlude, the first portion and the second portion abut against each other to generate a force or torque, the force or torque including at least the labial inclination force of the maxillary anterior teeth or the labial inclination torque of the maxillary anterior teeth.

[0010] This invention provides a design method for a dental orthodontic system, comprising:

[0011] The design quantities of the target region in the digital model of the upper and lower jaws are obtained, and the design quantities include the translation and / or rotation of the target region.

[0012] The design parameters of the guide plate structure are determined based on the design quantity, and the guide plate structure includes a first guide plate and a second guide plate.

[0013] Based on the design parameters, a first guide plate is added to the target area of ​​the maxillary digital model, and a second guide plate is added to the target area of ​​the mandibular digital model.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: When designing the jaw plate structure, the embodiments of the present invention can select appropriate parameters according to the correction requirements of the correction step, realize the personalized design of the jaw plate structure for each correction step, and greatly improve the correction effect; different parameters can make the two orthodontic appliances generate different forces and / or different torques, and meet the correction requirements of different correction steps through different forces and / or different torques. Attached Figure Description

[0015] Figure 1 is a schematic diagram of a dental system according to a first embodiment of the present invention;

[0016] Figure 2 is a schematic diagram of the orthodontic appliance of the first embodiment (first design and second design) of the present invention being worn on the teeth with the first part and the second part abutting against each other;

[0017] Figure 3 is a schematic diagram of the orthodontic appliance being worn on the teeth in the Nth orthodontic step of the first embodiment of the present invention.

[0018] Figures 4 and 5 are schematic diagrams of the orthodontic appliances worn on the teeth in two different N+M orthodontic steps according to the first embodiment of the present invention.

[0019] Figure 6 is a schematic diagram of the target jaw position and the starting jaw position according to the first embodiment of the present invention;

[0020] Figure 7 is a schematic diagram of the two protrusions abutting each other in the first form;

[0021] Figure 8 is a schematic diagram of the second type of protrusion and the part that fits the tooth abutting against each other;

[0022] Figure 9 is a schematic diagram showing the first and second parts of different corrective steps in the first implementation form abutting each other;

[0023] Figure 10 is a schematic diagram showing the first and second parts abutting against each other in the second and third implementation forms;

[0024] Figure 11 is a schematic diagram of the orthodontic appliance in Figure 10 projected onto the first reference plane;

[0025] Figure 12 is a schematic diagram of the orthodontic appliance in Figure 10 in two different orthodontic steps;

[0026] Figure 13 is a schematic diagram showing the first and second parts abutting each other in the fourth implementation;

[0027] Figure 14 is a schematic diagram of the orthodontic appliance in Figure 13 projected onto the second reference plane;

[0028] Figure 15 is a schematic diagram of the orthodontic appliance in Figure 13 in two different orthodontic steps;

[0029] Figure 16 is a schematic diagram of the orthodontic appliance in the target jaw position and the starting jaw position according to the second embodiment of the present invention.

[0030] Figure 17 is a schematic diagram of the multiple first protrusion structures spaced apart according to the second embodiment of the present invention;

[0031] Figure 18 is a schematic diagram of multiple first protrusion structures connected as one unit in the second embodiment of the present invention;

[0032] Figure 19 is a schematic diagram of the first type of orthodontic appliance;

[0033] Figure 20 is a schematic diagram of the second type of orthodontic appliance;

[0034] Figure 21 is a schematic diagram of the third type of orthodontic appliance;

[0035] Figure 22 is a schematic diagram of an orthodontic appliance in a deep overbite treatment scenario;

[0036] Figure 23 is a schematic diagram of the orthodontic appliances for different orthodontic steps in the case of deep overbite treatment;

[0037] Figure 24 is a schematic diagram of different parameters of the orthodontic appliance according to the second embodiment of the present invention;

[0038] Figure 25 is a schematic diagram of the orthodontic appliance according to the third embodiment of the present invention;

[0039] Figure 26 is a schematic diagram of two protrusions abutting each other in the third embodiment (first form) of the present invention;

[0040] Figure 27 is a schematic diagram showing the protrusion and the tooth-fitting portion abutting against each other in the third embodiment (second form) of the present invention.

[0041] Figure 28 is a schematic diagram of the target jaw position and the starting jaw position according to the third embodiment of the present invention;

[0042] Figure 29 is a schematic diagram showing the first part and the second part abutting against each other in the first implementation of the present invention;

[0043] Figure 30a is a schematic diagram showing the first part and the second part abutting against each other in the second implementation of the present invention;

[0044] Figure 30b is a schematic diagram of the orthodontic appliance in Figure 30a projected onto the first reference plane;

[0045] Figure 31 is a schematic diagram of the orthodontic appliance in Figure 30a in two different orthodontic steps;

[0046] Figure 32a is a schematic diagram showing the first and second parts abutting against each other in the third implementation of the present invention;

[0047] Figure 32b is a schematic diagram of the orthodontic appliance in Figure 32a projected onto the first reference plane;

[0048] Figure 33 is a schematic diagram showing the first part and the second part abutting each other in the fourth implementation of the present invention;

[0049] Figure 34a is a schematic diagram showing the first and second parts abutting against each other in the fifth implementation of the present invention;

[0050] Figure 34b is a schematic diagram of the orthodontic appliance in Figure 34a projected onto the second reference plane;

[0051] Figure 35 is a schematic diagram of the orthodontic appliance in Figure 34a in two different orthodontic steps;

[0052] Figure 36 is a schematic diagram showing that the first part and the second part of the third embodiment of the present invention are located in different regions;

[0053] Figure 37 is a schematic diagram of the orthodontic appliance of the first design form of the present invention in two different orthodontic steps;

[0054] Figure 38 is a schematic diagram of the second design of the present invention in two different orthodontic steps;

[0055] Figure 39 is a schematic diagram of various parameters of the orthodontic appliance according to the third embodiment of the present invention;

[0056] Figure 40 is a flowchart illustrating the design method of the orthodontic system according to the fourth embodiment of the present invention.

[0057] Figure 41 is a schematic diagram of the design method of the orthodontic system according to the fourth embodiment of the present invention;

[0058] Figure 42 is a schematic diagram of the orthodontic system according to the fourth embodiment of the present invention;

[0059] Figures 43 and 44 are schematic diagrams of different implementations of the first guide plate and the second guide plate according to the fourth embodiment of the present invention;

[0060] Figures 45 to 47 are step diagrams of some steps in the design method of the orthodontic system according to the fourth embodiment of the present invention.

[0061] Figure 48 is a schematic diagram of the digital models of the upper and lower jaws in different jaw positions according to the fourth embodiment of the present invention.

[0062] Figure 49 is a schematic diagram of the digital model of the mandible and jaw with guide plate structure according to the fourth embodiment of the present invention.

[0063] Figure 50 is a flowchart of some steps in the design method of the orthodontic system according to the fourth embodiment of the present invention.

[0064] Figure 51 is a schematic diagram of a digital model of the maxilla and mandible with a guide plate structure in a deep overbite application scenario according to the fourth embodiment of the present invention.

[0065] Figure 52 is a schematic diagram of the digital models of the upper and lower jaws at different orthodontic steps in Figure 51;

[0066] Figure 53 is a flowchart of the molding method of the dental orthodontic system according to the fourth embodiment of the present invention;

[0067] Figure 54 is a block diagram of the device for designing a dental orthodontic system according to the fourth embodiment of the present invention. Detailed Implementation

[0068] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0069] Figures 1 and 2 are schematic diagrams of a dental system 200 according to the first embodiment of the present invention.

[0070] The dental system 200 includes two appliances 100 corresponding to the Nth orthodontic step and the N+Mth orthodontic step, where N and M are both positive integers.

[0071] Each orthodontic appliance 100 includes a jaw plate structure 10 connecting the upper and lower jaws. The jaw plate structure 10 includes a first part 11 corresponding to the maxillary tooth T1 and a second part 12 corresponding to the mandibular tooth T2.

[0072] Optionally, maxillary tooth T1 and mandibular tooth T2 can be either anterior or posterior teeth. Here, we will take the example where both maxillary tooth T1 and mandibular tooth T2 are anterior teeth.

[0073] When the jaw plate structure 10 connects the upper and lower jaws, the first part 11 and the second part 12 abut against each other to form an abutment surface B.

[0074] The jaw plate structure 10 can be designed differently for different orthodontic steps.

[0075] In the first design, the two jaw plate structures 10 of the two orthodontic appliances 100 have different parameters, including at least one of the following: the setting position of the jaw plate structure 10, the shape of the abutment surface B, the position of the contact point O formed by the abutment surface B, and the direction of the line of action L passing through the contact point O.

[0076] The installation position of the jaw plate structure 10 is defined as the installation position of the jaw plate structure 10 within the installation gap S, where the installation gap S is the gap formed between the upper and lower jaws for installing the jaw plate structure 10.

[0077] Optionally, the position of the jaw plate structure 10 may be, for example, near the incisal end Q1 of the maxillary tooth T1, near the incisal end Q2 of the mandibular tooth T2, or in the area between the incisal end Q1 of the maxillary tooth T1 and the incisal end Q2 of the mandibular tooth T2; once the position of the jaw plate structure 10 is determined, the position of the contact surface B is also determined.

[0078] The shape of the contact surface B includes at least one of the following: the geometry of the contact surface B, and the direction of extension of the contact surface B.

[0079] Optionally, the contact surface B can be a plane or a curved surface. When the contact surface B is a plane, the geometric shape of the contact surface B can be a regular shape such as a circle, ellipse, square, triangle or other irregular shape. When the contact surface B is a curved surface, the geometric shape of the contact surface B can be defined by the curvature of the contact surface B.

[0080] The direction of extension of the contact surface B is, for example, the horizontal direction, or the direction that forms different angles with the horizontal direction.

[0081] The contact point O is defined as the spatial position of the geometric center or force center of the contact surface B within the installation gap S.

[0082] Optionally, the contact point O refers to the resultant point of all forces acting on the contact surface B. The contact point O can be the geometric center or the force center of the contact surface B.

[0083] The position of the contact point O of the contact surface B is mainly determined by the shape of the contact surface B.

[0084] When the contact surface B is a plane, the contact point O can be the geometric center or the force center of the contact surface B. The geometric center is defined as the center or centroid of the plane, and the force center is defined as the resultant point of all forces acting on the plane. The force center can overlap with the geometric center.

[0085] When the contact surface B is a curved surface, the contact point O can be the force center of the curved surface. The force center is defined as the resultant point of all forces acting on the curved surface.

[0086] The line of action L passing through the contact point O is used to characterize the resultant force of the forces generated by the mutual contact between the first part 11 and the second part 12.

[0087] When the contact surface B is a plane, the line of action L is perpendicular to the plane. When the contact surface B is a curved surface, the line of action L is perpendicular to the tangent of the curved surface, and the tangent passes through the contact point O of the curved surface.

[0088] When designing the jaw plate structure 10, appropriate parameters can be selected according to the treatment needs of the treatment step to achieve personalized design of the jaw plate structure 10 for each treatment step, which can greatly improve the treatment effect.

[0089] Referring to Figures 3 to 5, illustrate the design process for different parameters.

[0090] Referring to Figure 3, it is a schematic diagram of the appliance 100 being worn on the teeth in the Nth orthodontic step. The first part 11 and the second part 12 abut against each other and form an action line L passing through the contact point O.

[0091] Referring to Figure 4, which is a schematic diagram of the appliance 100 of the N+M orthodontic step being worn on the teeth, the direction of the line of action L of the N+M orthodontic step changes compared to the N orthodontic step (the line of action L of the N+M orthodontic step is more labial), that is, the different parameters of the N orthodontic step and the N+M orthodontic step include at least the direction of the line of action L passing through the contact point O.

[0092] Referring to Figure 5, which is a schematic diagram of the appliance 100 of the N+M orthodontic step being worn on the teeth, the position of the contact surface B changes compared to the Nth orthodontic step (the contact surface B of the N+M orthodontic step is closer to the incisal edge Q1 of the maxillary tooth T1). That is, the different parameters of the Nth and N+M orthodontic steps include at least the setting position of the jaw plate structure 10.

[0093] In the second design, the two jaw plate structures 10 corresponding to the two orthodontic appliances 100 have different parameters. The different parameters are configured such that when the jaw plate structures 10 connect the upper and lower jaws, the different parameters generate different forces and / or different torques.

[0094] The two jaw plate structures 10 having different parameters could mean that the design parameters of the two jaw plate structures 10 are different, or that the external forces acting on the two jaw plate structures 10 are different.

[0095] Different parameters can cause the two orthodontic appliances 100 to generate different forces and / or different torques, thereby meeting the orthodontic needs of different orthodontic steps.

[0096] Optionally, when the parameters are the design parameters of the jaw plate structure 10 itself, the selection of parameters can refer to the first design, but is not limited to it.

[0097] Optionally, referring to Figure 6, the parameter can also be the external force acting on the jaw plate structure 10.

[0098] When the first part 11 and the second part 12 abut against each other, the upper and lower jaws form the target jaw position W1. The parameters include the occlusal force on the jaw plate structure 10 when the target jaw position W1 is reached, that is, the external force at this time is the occlusal force.

[0099] Optionally, the occlusal force corresponding to the target jaw position W1 is positively correlated with the degree of opening of the upper and lower jaws, which includes the opening angle or gap between the upper and lower jaws.

[0100] The opening angle between the upper and lower jaws can refer to the rotation angle of the lower jaw relative to the upper jaw relative to the closed state.

[0101] The gap between the upper and lower jaws can refer to the distance the lower jaw moves downwards during the rotation of the lower jaw relative to the upper jaw, relative to the closed state.

[0102] When the upper and lower jaws open to the target jaw position W1, the jaw muscles release to form a force state. The force state allows the first part 11 and the second part 12 to abut against each other and generate occlusal force. When the opening angle or the gap between the upper and lower jaws is large, the degree of jaw muscle release is greater, and the occlusal force generated by the first part 11 and the second part 12 abutting against each other is greater. The occlusal force is applied to the jaw plate structure 10 and converted into force and / or torque applied to the upper and lower teeth.

[0103] Optionally, the Nth and N+Mth orthodontic steps have different occlusal forces, which correspond to different target jaw positions W1 for the Nth and N+Mth orthodontic steps. The different target jaw positions W1 can refer to different degrees of opening.

[0104] Specifically, the opening angle between the upper and lower jaws in the Nth orthodontic step is different from that in the N+M orthodontic step, or the gap between the upper and lower jaws in the Nth orthodontic step is different from that in the N+M orthodontic step.

[0105] Optionally, the target jaw position W1 deviates from the initial jaw position W, and the occlusal force corresponding to the target jaw position W1 is greater than the initial occlusal force corresponding to the initial jaw position W.

[0106] When the occlusal force corresponding to the target jaw position W1 is greater than the initial occlusal force corresponding to the initial jaw position W, the opening angle of the upper and lower jaws corresponding to the target jaw position W1 is greater than the opening angle of the upper and lower jaws corresponding to the initial jaw position W, and the gap between the upper and lower jaws corresponding to the target jaw position W1 is greater than the gap between the upper and lower jaws corresponding to the initial jaw position W.

[0107] The target jaw position W1 can be, for example, by raising the maxilla through the mutual contact of the first part 11 and the second part 12, thereby increasing the opening angle or the gap between the maxilla and mandible. At this time, the target jaw position W1 deviates from the initial jaw position W before the elevation, and the relatively higher target jaw position W1 corresponds to a relatively larger occlusal force.

[0108] The initial jaw position W can be a custom jaw position or a specific jaw position. The initial jaw position W has a relatively small initial occlusal force, while the target jaw position W1 has a relatively large occlusal force.

[0109] Optionally, the initial jaw position W can be the resting jaw position.

[0110] The resting jaw position can be defined as the position that the upper and lower jaws automatically find when they are in a normal relaxed state. For example, when the mouth is not chewing, swallowing, or speaking, the lower jaw is in a resting state, and the dental arches of the upper and lower jaws are naturally separated. The jaw position at this time is called the resting jaw position, and the initial biting force is zero.

[0111] The resting jaw position can also be a jaw position with a small biting force between the upper and lower jaws. For example, the jaw position when the initial biting force is less than a preset value is called the resting jaw position.

[0112] Optionally, referring to Figures 7 and 8, one of the first part 11 and the second part 12 is a protrusion A1 protruding from the tooth, and the other is a protrusion A1 protruding from the tooth or a part A2 that conforms to the tooth.

[0113] The protrusion A1 is directly connected to the tooth, or the orthodontic appliance 100 also includes appliance bodies 101 and 102 having cavities S1 and S2 for accommodating the tooth, with the protrusion A1 connected to the appliance bodies 101 and 102.

[0114] A1 protrusion refers to the protruding structure that protrudes from the teeth (or the orthodontic appliance body 101, 102).

[0115] The orthodontic appliance bodies 101 and 102 are invisible orthodontic appliances that match the teeth. The orthodontic appliance bodies 101 and 102 can be the upper orthodontic appliance body 101 that matches the upper teeth and / or the lower orthodontic appliance body 102 that matches the lower teeth. The cavities S1 and S2 can be the upper cavity S1 formed by the upper orthodontic appliance body 101 to accommodate the upper teeth and / or the lower cavity S2 formed by the lower orthodontic appliance body 102 to accommodate the lower teeth.

[0116] The portion A2 that conforms to the teeth is the tooth area, or the portion A2 that conforms to the teeth is the area where the orthodontic appliance body 101, 102 is in close contact with the teeth.

[0117] Referring to Figure 7, both the first part 11 and the second part 12 are protrusions A1, and the two protrusions A1 are respectively connected to the upper orthodontic appliance body 101 and the lower orthodontic appliance body 102. In other embodiments, the first part 11 or the second part 12 may also be directly connected to the teeth.

[0118] Referring to Figure 8, the first part 11 is a protrusion A1, which is connected to the upper orthodontic appliance body 101. The second part 12 is the part of the lower orthodontic appliance body 102 that is in close contact with the teeth. In other embodiments, the first part 11 may also be directly connected to the teeth, or the second part 12 may be directly the tooth area.

[0119] Optionally, the entire orthodontic process can be divided into multiple orthodontic stages, with the Nth orthodontic step and the N+Mth orthodontic step corresponding to different or the same orthodontic stages.

[0120] Each orthodontic stage includes at least one of the following: maxillary labial-buccal inclination correction, mandibular labial-buccal inclination correction, maxillary-lingual inclination correction, mandibular-lingual inclination correction, maxillary depressurization correction, mandibular depressurization correction, maxillary anterior retraction correction, mandibular anterior retraction correction, etc.

[0121] Optionally, different parameters can produce different forces and / or torques. The forces can be depressing forces, anterior tooth retraction forces, labial / buccal tilting forces, or lingual tilting forces, etc., and the torques can be labial / buccal tilting torques or lingual tilting torques.

[0122] Both labial-buccal tilting force and labial-buccal tilting torque can achieve labial tilting of teeth, and both lingual tilting force and lingual tilting torque can achieve lingual tilting of teeth. For ease of explanation, torque will be used to describe labial-lingual tilting of teeth below.

[0123] Referring to Figures 9 to 15, taking the deep overbite treatment scenario as an example, we will explain the various implementation forms of the appliance 100 in the Nth treatment step and the appliance 100 in the N+Mth treatment step. The occlusal plate structure 10 in the appliance 100 in the Nth treatment step is set to correspond to the maxillary anterior teeth T1 and the mandibular anterior teeth T2, and the occlusal plate structure 10 in the appliance 100 in the N+Mth treatment step is set to correspond to the maxillary anterior teeth T1 and the mandibular anterior teeth T2.

[0124] In this deep overbite treatment scenario, when in the untreated stage, the maxillary anterior tooth T1 is closer to the labial side than the mandibular anterior tooth T2, and the maxillary anterior tooth T1 partially covers the mandibular anterior tooth T2.

[0125] The orthodontic appliance 100 of the Nth orthodontic step includes an upper orthodontic appliance body 101 worn on the maxilla, a lower orthodontic appliance body 102 worn on the mandible, and a jaw plate structure 10, the jaw plate structure 10 including a first part 11 and a second part 12.

[0126] The first part 11 is set on the lingual side or incisal edge Q1 of the maxillary anterior tooth T1, and the second part 12 is set on the labial side or incisal edge Q2 of the mandibular anterior tooth T2. Here, we take the example of the first part 11 being set on the lingual side of the maxillary anterior tooth T1 and the second part 12 being set on the labial side of the mandibular anterior tooth T2.

[0127] The orthodontic appliance 100 of the N+M orthodontic step includes an upper orthodontic appliance body 101 worn on the maxilla, a lower orthodontic appliance body 102 worn on the mandible, and a jaw plate structure 10, the jaw plate structure 10 including a first part 11 and a second part 12.

[0128] The first part 11 is set on the lingual side or incisal edge Q1 of the maxillary anterior tooth T1, and the second part 12 is set on the labial side or incisal edge Q2 of the mandibular anterior tooth T2. Here, we take the example of the first part 11 being set on the lingual side of the maxillary anterior tooth T1 and the second part 12 being set on the labial side of the mandibular anterior tooth T2.

[0129] In the first implementation, referring to Figure 9, the first part 11 and the second part 12 of the orthodontic appliance 100 in the Nth orthodontic step abut against each other to generate a first torque M1. The first torque M1 includes only the maxillary labial tilt torque M11, or the first torque M1 includes the maxillary labial tilt torque M11 and the mandibular labial tilt torque M12.

[0130] In the N+Mth orthodontic step, the first part 11 and the second part 12 of the appliance 100 abut against each other to generate a second torque M2, which includes a maxillary inclination torque M21 and a mandibular inclination torque M22.

[0131] When the first torque M1 only includes the maxillary labial inclination torque M11, the first torque M1 only achieves the labial inclination of the maxillary anterior tooth T1.

[0132] When the first torque M1 includes the maxillary labial tilt torque M11 and the mandibular labial tilt torque M12, the first torque M1 simultaneously achieves the labial tilt of the maxillary anterior tooth T1 and the labial tilt of the mandibular anterior tooth T2.

[0133] When the second torque M2 includes the maxillary labial inclination torque M21 and the mandibular labial inclination torque M22, the second torque M2 simultaneously achieves the labial inclination of the maxillary anterior tooth T1 and the mandibular anterior tooth T2.

[0134] The absolute value of the lever arm corresponding to the maxillary labial inclination torque M11 in the first torque M1 is not less than the absolute value of the lever arm corresponding to the maxillary labial inclination torque M21 in the second torque M2. That is, the degree of labial inclination produced by the maxillary anterior tooth T1 in the Nth orthodontic step is not less than the degree of labial inclination produced by the maxillary anterior tooth T1 in the N+Mth orthodontic step.

[0135] The absolute value of the lever arm corresponding to the mandibular labial inclination torque M12 in the first torque M1 is not greater than the absolute value of the lever arm corresponding to the mandibular labial inclination torque M22 in the second torque M2. That is, the degree of labial inclination produced by the mandibular anterior tooth T2 in the Nth orthodontic step is not greater than the degree of labial inclination produced by the mandibular anterior tooth T2 in the N+Mth orthodontic step.

[0136] In the first implementation, the entire orthodontic process is roughly divided into three stages. The first stage mainly achieves the correction of labial intrusion of the maxillary anterior teeth, the second stage mainly achieves the correction of labial intrusion of the mandibular anterior teeth, and the third stage mainly achieves the correction of intrusion of both the maxillary and mandibular anterior teeth.

[0137] In the Nth orthodontic step, the maxillary anterior tooth T1 can produce a relatively large labial inclination, and the Nth orthodontic step can correspond to the first orthodontic stage; in the N+M orthodontic step, the mandibular anterior tooth T2 can produce a relatively large labial inclination, and the N+M orthodontic step can correspond to the second orthodontic stage.

[0138] In the first orthodontic stage, taking the Nth orthodontic step as an example, since the maxillary anterior teeth T1 and mandibular anterior teeth T2 are usually relatively vertical, a relatively large maxillary labial inclination moment M11 can be provided first to adjust the relative position of the maxillary anterior teeth T1 and alveolar bone to a larger extent. The relative position of the mandibular anterior teeth T2 and alveolar bone can be left unadjusted first, or a relatively small mandibular labial inclination moment M12 can be provided to adjust the relative position of the mandibular anterior teeth T2 and alveolar bone to a smaller extent.

[0139] Optionally, while the maxillary anterior T1 is labially tilted, the maxillary anterior T1 may also be indented to a certain extent. That is, the first orthodontic stage mainly achieves the correction of labial tilt and indentation of the maxillary anterior teeth.

[0140] In the first orthodontic stage, it is mainly used to achieve labial inclination and depressurization of the maxillary anterior teeth T1, but it can also achieve auxiliary orthodontic functions, such as simultaneously achieving labial inclination and depressurization of the mandibular anterior teeth T2.

[0141] In the second orthodontic stage, taking the N+M step of the second orthodontic stage as an example, the labial inclination of the maxillary anterior tooth T1 has progressed to a certain extent. At this time, a smaller maxillary labial inclination torque M21 can be provided to avoid excessive labial inclination of the maxillary anterior tooth T1. At the same time, a larger mandibular labial inclination torque M22 can be provided to adjust the relative position of the mandibular anterior tooth T2 and the alveolar bone to a greater extent.

[0142] Optionally, while the mandibular anterior T2 exhibits labial inclination, it may also exhibit a certain degree of intrusion. In other words, the second orthodontic stage mainly achieves the correction of labial inclination and intrusion of the mandibular anterior T2.

[0143] In the second orthodontic stage, it is mainly used to achieve labial intrusion reduction of the mandibular anterior teeth T2, but it can also achieve auxiliary orthodontic functions, such as simultaneously achieving labial intrusion reduction of the maxillary anterior teeth T1.

[0144] In the third orthodontic stage, when the labial inclination of the maxillary anterior T1 and the mandibular anterior T2 has reached a certain level, the deep overbite has also been improved to a certain extent, and there is a certain space between the maxillary anterior T1 and the mandibular anterior T2 to achieve absolute intrusion.

[0145] Absolute indentation mainly refers to the force generated by the mutual contact between the first part 11 and the second part 12, which mainly achieves indentation. For example, the first part 11 can be set near the incisal end Q1 of the maxillary anterior tooth T1 or directly set at the incisal end Q1, and the second part 12 can be set near the incisal end Q2 of the mandibular anterior tooth T2 or directly set at the incisal end Q2. This allows a larger proportion of the force to be used to indent the maxillary anterior tooth T1 and the mandibular anterior tooth T2. That is, the third orthodontic stage mainly achieves the indentation correction of the maxillary anterior teeth and the mandibular anterior teeth.

[0146] Optionally, the Nth and N+Mth orthodontic steps in the first implementation can also correspond to the same orthodontic stage. For example, both the Nth and N+Mth orthodontic steps are used to achieve the correction of the labial inclination of the maxillary anterior teeth, and the maxillary labial inclination torques generated by the Nth and N+Mth orthodontic steps are different.

[0147] In the second implementation, referring to Figures 10 to 12, the line of action L forms a first projection line L' at the first reference surface P1, the first impedance center R1 defined by the maxillary anterior tooth T1 has a first projection point R1' at the first reference surface P1 located on the first side E1 of the first projection line L', and the second impedance center R2 defined by the mandibular anterior tooth T2 has a second projection point R2' at the first reference surface P1 located on the first side E1 of the first projection line L' or located on the first projection line L'.

[0148] The line of action L passes through the contact point O of the contact surface B (i.e., the line of action L passes through the geometric center or force center of the contact surface B).

[0149] The first side E1 includes the incisal edge Q2 of the mandibular anterior tooth T2, and the first side E1 is the right side region of the first projection line L'.

[0150] The first reference plane P1 is parallel to the sagittal plane, which is a longitudinal section that divides the entire jaw into left and right parts.

[0151] Alternatively, the first reference plane P1 passes through the line of action L and extends along the lip-tongue direction X.

[0152] There is a vertical distance between the first projection point R1' and the first projection line L'. The orthodontic appliance 100 in the Nth orthodontic step and the orthodontic appliance 100 in the N+Mth orthodontic step have a first vertical distance H1 and a second vertical distance H2, respectively. The first vertical distance H1 is not less than the second vertical distance H2.

[0153] The first vertical distance H1 and the second vertical distance H2 can be used to characterize the magnitude of the labial tilting moment M1' generated by the maxillary anterior tooth T1. When the first vertical distance H1 is not less than the second vertical distance H2, it can be used to characterize that the labial tilting moment M1' generated by the maxillary anterior tooth T1 in the Nth orthodontic step is not less than the labial tilting moment M1' generated by the maxillary anterior tooth T1 in the N+Mth orthodontic step.

[0154] The vertical distance between the first projection point R1' and the first projection line L' is positively correlated with the labial tilting moment M1' generated by the maxillary anterior tooth T1. The labial tilting moment M1' generated by the maxillary anterior tooth T1 in each orthodontic step can be adjusted by controlling the vertical distance.

[0155] In the second implementation, the maxillary anterior tooth T1 in the Nth orthodontic step can produce a relatively large labial inclination, which is suitable for the first orthodontic stage in the first implementation.

[0156] In the third implementation, continuing with Figures 10 to 12, the line of action L forms a first projection line L' at the first reference surface P1, the first impedance center R1 defined by the maxillary anterior tooth T1 has its first projection point R1' at the first reference surface P1 located on the first side E1 of the first projection line L', and the second impedance center R2 defined by the mandibular anterior tooth T2 has its second projection point R2' at the first reference surface P1 located on the first side E1 of the first projection line L' or located on the first projection line L'.

[0157] The line of action L passes through the contact point O of the contact surface B (i.e., the line of action L passes through the geometric center or force center of the contact surface B).

[0158] The first side E1 includes the incisal edge Q2 of the mandibular anterior tooth T2, and the first side E1 is the right side region of the first projection line L'.

[0159] The first reference plane P1 is parallel to the sagittal plane, which is a longitudinal section that divides the entire jaw into left and right parts.

[0160] Alternatively, the first reference plane P1 passes through the line of action L and extends along the lip-tongue direction X.

[0161] There is a vertical distance between the second projection point R1' and the first projection line L'. The orthodontic appliance 100 in the Nth orthodontic step and the orthodontic appliance 100 in the N+Mth orthodontic step have a third vertical distance H3 and a fourth vertical distance H4, respectively. The third vertical distance H3 is not greater than the fourth vertical distance H4.

[0162] The third vertical distance H3 and the fourth vertical distance H4 can be used to characterize the magnitude of the labial tilting moment M2' generated by the mandibular anterior tooth T2. When the third vertical distance H3 is not greater than the fourth vertical distance H4, it can be used to characterize that the labial tilting moment M2' generated by the mandibular anterior tooth T2 in the Nth orthodontic step is not greater than the labial tilting moment M2' generated by the mandibular anterior tooth T2 in the N+Mth orthodontic step.

[0163] The vertical distance between the second projection point R2' and the first projection line L' is positively correlated with the labial tilting moment M2' generated by the mandibular anterior tooth T2. The labial tilting moment M2' generated by the mandibular anterior tooth T2 in each orthodontic step can be adjusted by controlling the vertical distance.

[0164] In the third implementation, the mandibular anterior teeth T2 in the N+M orthodontic step can produce a relatively large labial inclination, which is suitable for the second orthodontic stage in the first implementation.

[0165] In the fourth implementation, referring to Figures 13 to 15, the impedance center connecting line segment D forms the second projection line segment D” at the second reference surface P2, and the contact point O of the contact surface B (i.e., the geometric center or force center of the contact surface B) is located at the third projection point O’ at the second reference surface P2, which is located on the second side E2 of the second projection line segment D”.

[0166] The two endpoints of the line segment D connecting the impedance centers are the first impedance center R1 defined by the maxillary anterior tooth T1 and the second impedance center R2 defined by the mandibular anterior tooth T2.

[0167] The second reference plane P2 is parallel to the sagittal plane, which is a longitudinal section that divides the entire jaw into left and right parts.

[0168] Alternatively, the second reference surface P2 can be determined by the geometric center O or force center O of the contact surface B, the first impedance center R1, and the second impedance center R2, i.e., the second reference surface P2 is determined by three points.

[0169] Alternatively, the second reference surface P2 passes through at least one of the geometric center O or force center O of the contact surface B, the first impedance center R1, and the second impedance center R2 and extends along the lip direction X, i.e., at least one point and the lip direction X determine the second reference surface P2.

[0170] The second side E2 includes the incisal edge Q1 of the maxillary anterior tooth T1, and the second side E2 is the left region of the second projection segment D”.

[0171] There is a vertical distance between the third projection point O' and the second projection line segment D”. The orthodontic appliance 100 of the Nth orthodontic step and the orthodontic appliance 100 of the N+Mth orthodontic step have a first vertical distance K1 and a second vertical distance K2, respectively. The second vertical distance K2 is not less than the first vertical distance K1.

[0172] The first vertical distance K1 and the second vertical distance K2 can be used to characterize the design space of the labial inclination moment of the maxillary and mandibular anterior teeth. When the vertical distance is larger, the design space of the labial inclination moment of the maxillary and mandibular anterior teeth is larger, and a relatively larger labial inclination moment corresponding to the maxillary anterior tooth T1 or a relatively larger labial inclination moment corresponding to the mandibular anterior tooth T2 can be designed, thereby achieving a larger labial inclination of the maxillary anterior teeth or the mandibular anterior teeth.

[0173] Optionally, the dental system 200 of this embodiment can also be used in other application scenarios or in other deep overbite treatment scenarios. Below, we will briefly introduce several other application scenarios.

[0174] In the first other application scenario, the first orthodontic stage mainly achieves maxillary-lingual tilting and depressing correction, the second orthodontic stage mainly achieves mandibular-lip tilting and depressing correction, and the third orthodontic stage mainly achieves maxillary depressing correction and mandibular depressing correction. Different orthodontic appliances 100 can be matched according to the different orthodontic needs of each orthodontic stage.

[0175] In the second application scenario, the first orthodontic stage mainly achieves the correction of maxillary labial tilt and the second orthodontic stage mainly achieves the correction of mandibular lingual tilt and the second orthodontic stage. Different orthodontic appliances 100 can be matched according to the different orthodontic needs of each orthodontic stage.

[0176] In summary, when designing the jaw plate structure 10, the first embodiment can select appropriate parameters according to the treatment requirements of the treatment step, thereby realizing the personalized design of the jaw plate structure 10 for each treatment step and greatly improving the treatment effect. Different parameters can cause the two orthodontic appliances 100 to generate different forces and / or different torques, thereby meeting the treatment requirements of different treatment steps through different forces and / or different torques.

[0177] Figure 16 is a schematic diagram of the orthodontic appliance 100 according to the second embodiment of the present invention.

[0178] The orthodontic appliance 100 includes a first protrusion structure 10' disposed on the labial or buccal side or lingual side corresponding to the first occlusal T1'. The first protrusion structure 10' is configured such that when the first protrusion structure 10' abuts against the opposing second occlusal T2', a target occlusal position W1 is formed. The target occlusal position W1 deviates from the initial occlusal position W, and the occlusal force corresponding to the target occlusal position W1 is greater than the initial occlusal force corresponding to the initial occlusal position W.

[0179] One of the first jaw T1' and the second jaw T2' is the maxilla, and the other is the mandible. For ease of explanation, we will take the example of the first jaw T1' being the maxilla and the second jaw T2' being the mandible.

[0180] "The first protruding structure 10' abuts against the opposing second tooth T2'" can mean that the first protruding structure 10' directly abuts against the second tooth T2', or it can mean that the first protruding structure 10' indirectly abuts against the second tooth T2' through other structures.

[0181] Optionally, the target occlusal position W1 can be achieved by raising the first occlusal position T1' through the mutual contact of the first protrusion structure 10' and the second occlusal position T2' (as shown in Figure 16, the first occlusal position T1' is raised by h), so that the target occlusal position W1 formed between the first occlusal position T1' and the second occlusal position T2' deviates from the initial occlusal position W before the elevation, and the relatively higher target occlusal position W1 corresponds to a relatively larger occlusal force.

[0182] This embodiment achieves the target jaw position W1 by the mutual contact of the first protruding structure 10' and the second jaw T2'. The target jaw position W1 has a large biting force, which can provide a greater orthodontic force for the first jaw T1' and the second jaw T2'.

[0183] In addition, the target jaw position W1 can be controlled by controlling the relative position of the first protruding structure 10' and the second jaw T2', thereby effectively controlling the orthodontic force.

[0184] Optionally, the starting jaw position W can be a custom jaw position or a specific jaw position; for example, the starting jaw position W can be the resting jaw position.

[0185] The resting jaw position can be defined as the position that the first jaw T1' and the second jaw T2' automatically find when they are in a normal relaxed state. For example, when the mouth is not chewing, swallowing, or speaking, the second jaw T2' is in a resting state, and the dental arches of the first jaw T1' and the second jaw T2' are naturally separated. The jaw position formed by the first jaw T1' and the second jaw T2' at this time is called the resting jaw position.

[0186] The resting jaw position corresponds to an initial occlusal force of zero. Alternatively, the resting jaw position can also be a jaw position with a small occlusal force between the first jaw T1' and the second jaw T2'. For example, the jaw position where the initial occlusal force is less than the initial value is called the resting jaw position.

[0187] Optionally, the degree of opening of the target jaw position W1 is positively correlated with the occlusal force, and the degree of opening includes the opening angle or gap between the first jaw T1' and the second jaw T2'.

[0188] When the first jaw T1' and the second jaw T2' open, the jaw muscles are released and generate force. This force is applied to the first protruding structure 10' and the second jaw T2' that are abutting each other and is converted into occlusal force.

[0189] When the opening angle or gap between the first jaw T1' and the second jaw T2' is large, the greater the release of jaw muscles, the greater the biting force.

[0190] Optionally, the opening angle between the first jaw T1' and the second jaw T2' can refer to the rotation angle of the second jaw T2' relative to the first jaw T1' relative to the closed state.

[0191] When the first jaw T1' and the second jaw T2' are in the target jaw position W1, a first opening angle is formed between the first jaw T1' and the second jaw T2'. When the first jaw T1' and the second jaw T2' are in the initial jaw position W, an initial opening angle is formed between the first jaw T1' and the second jaw T2'. The first opening angle is greater than the initial opening angle, which corresponds to the occlusal force being greater than the initial occlusal force.

[0192] Optionally, the gap between the first jaw T1' and the second jaw T2' refers to the downward displacement of the second jaw T2' during the rotation of the second jaw T2' relative to the first jaw T1' in the closed state.

[0193] When the first jaw T1' and the second jaw T2' are in the target jaw position W1, a first gap is formed between the first jaw T1' and the second jaw T2'. When the first jaw T1' and the second jaw T2' are in the initial jaw position, an initial gap is formed between the first jaw T1' and the second jaw T2'. The first gap is larger than the initial gap, which corresponds to the occlusal force being greater than the initial occlusal force.

[0194] This embodiment can control the biting force by controlling the first opening angle and / or the first gap between the first jaw T1' and the second jaw T2' to meet orthodontic needs.

[0195] Optionally, the orthodontic appliance 100 includes a plurality of first protrusions 10' provided for multiple teeth.

[0196] Referring to Figure 17, at least some of the first protrusion structures 10' are spaced apart from each other, and each first protrusion structure 10' corresponds to a tooth or the gap between two adjacent teeth. Each first protrusion structure 10' can be designed independently to meet the orthodontic needs of each tooth.

[0197] Alternatively, referring to Figure 18, at least a portion of the first protrusion structure 10' is connected as a whole, and the connected at least a portion of the first protrusion structure 10' extends to cover at least one tooth and at least one gap between teeth. The connected at least a portion of the first protrusion structure 10' has a larger volume, which can improve stability and strength.

[0198] Optionally, referring to Figures 19 to 21, the first protrusion structure 10' is directly connected to the tooth of the first jaw T1', or the orthodontic appliance 100 further includes a first orthodontic appliance body 101' having a first cavity S1' for accommodating the first jaw T1', with the first protrusion structure 10' located on the labial / buccal surface A1' or lingual surface A2' of the first orthodontic appliance body 101'.

[0199] The first protruding structure 10' can directly or indirectly abut against the second jaw T2'.

[0200] When the first protruding structure 10' directly abuts against the second jaw T2', the first protruding structure 10' can directly abut against the tooth area of ​​the second jaw T2'.

[0201] When the first protrusion structure 10' indirectly abuts against the second jaw T2', the orthodontic appliance 100 may include a second protrusion structure 20' directly connected to the second jaw T2', and the first protrusion structure 10' abuts against the second protrusion structure 20' to achieve indirect abutment with the second jaw T2'.

[0202] Optionally, the first protrusion 10' can directly abut against the anterior incisal end Q' or the occlusal surface of the posterior tooth of the second occlusal tooth T2'.

[0203] Alternatively, the orthodontic appliance 100 may also include a second appliance body 102' having a second cavity S2' for accommodating the second jaw T2', wherein the first protrusion 10' abuts against the area of ​​the second appliance body 102' that is in close contact with the second jaw T2' to achieve indirect contact with the second jaw T2'.

[0204] Optionally, the first protruding structure 10' and the area of ​​the second appliance body 102' that is in close contact with the incisal edge Q' of the anterior teeth or the occlusal surface of the posterior teeth are mutually abutted.

[0205] Alternatively, the orthodontic appliance 100 may include a second protrusion structure 20' located on the second appliance body 102', with the first protrusion structure 10' abutting against the second protrusion structure 20' to achieve indirect contact with the second dentition T2'.

[0206] When the orthodontic appliance 100 includes a first orthodontic appliance body 101' and a second orthodontic appliance body 102', the first orthodontic appliance body 101' and the second orthodontic appliance body 102' can be invisible braces made of polymer materials.

[0207] When the orthodontic appliance 100 includes a second protrusion structure 20', the second protrusion structure 20' can be set on the labial or buccal side, lingual side, incisal edge of the anterior teeth, or occlusal surface of the posterior teeth corresponding to the second occlusal T2'. The first protrusion structure 10' and the second protrusion structure 20' abut against each other to form the target occlusal position H.

[0208] The following describes several ways in which the first protruding structure 10' and the second tooth T2' can be matched.

[0209] In the first type of fit, referring to Figure 19, the orthodontic appliance 100 includes a first appliance body 101', a second appliance body 102', a first protruding structure 10' and a second protruding structure 20', with the first protruding structure 10' indirectly abutting against the second occlusal tooth T2'.

[0210] The first protruding structure 10' is located on the lingual surface A2' of the first orthodontic appliance body 101', and the second protruding structure 20' is located on the labial surface A1' of the second orthodontic appliance body 102'. The first protruding structure 10' and the second protruding structure 20' abut against each other to form the target jaw position W1.

[0211] In the second type of fit, referring to Figure 20, the orthodontic appliance 100 includes a first appliance body 101', a second appliance body 102', and a first protrusion structure 10', the first protrusion structure 10' indirectly abutting against the second occlusal tooth T2'.

[0212] The first protruding structure 10' is located on the lingual surface A2' of the first orthodontic appliance body 101'. The first protruding structure 10' abuts against the area of ​​the anterior incisal edge Q2' of the second orthodontic appliance body 102' which is close to the second occlusal T2'. The first protruding structure 10' and the second orthodontic appliance body 102' abut against each other to form the target occlusal position W1.

[0213] In the third type of fit, referring to Figure 21, the orthodontic appliance 100 includes a first appliance body 101' and a first protruding structure 10', with the first protruding structure 10' directly abutting against the second occlusal tooth T2'.

[0214] The first protruding structure 10' is located on the lingual surface A2' of the first orthodontic appliance body 101'. The first protruding structure 10' abuts against the incisal end Q2' of the second occlusal tooth T2'. The first protruding structure 10' and the second occlusal tooth T2' abut against each other to form the target occlusal position W1.

[0215] The following, with reference to Figure 22, will further explain the orthodontic appliance 100 using the deep overbite treatment scenario as an example. The orthodontic appliance 100 includes a first orthodontic appliance body 101', a second orthodontic appliance body 102', a first protruding structure 10', and a second protruding structure 20'.

[0216] The first protruding structure 10' is provided on the labial / buccal side of the first jaw T1' and the second protruding structure 20' is provided on the lingual side of the second jaw T2', or the first protruding structure 10' is provided on the lingual side of the first jaw T1' and the second protruding structure 20' is provided on the labial / buccal side of the second jaw T2'.

[0217] In deep overbite treatment, the first jaw T1' covers at least part of the second jaw T2'. It is necessary to indent the first jaw T1' and the second jaw T2' to improve the deep overbite. However, the first jaw T1' and the second jaw T2' are usually relatively vertical in the initial state. The initial relative positions of the first jaw T1', the second jaw T2' and the alveolar bone are not suitable for direct absolute indentation of the first jaw T1' and the second jaw T2'. Therefore, it is necessary to adjust the relative positions of the first jaw T1' and the alveolar bone and the second jaw T2' and the alveolar bone first.

[0218] The first protrusion 10' is positioned on the lingual side of the maxillary (first tooth T1') anterior teeth, and the second protrusion 20' is positioned on the labial side of the mandibular (second tooth T2') anterior teeth. When the first protrusion 10' and the second protrusion 20' abut against each other, a torque is generated. The torque includes only the maxillary labial inclination torque M1a or the torque includes both the maxillary labial inclination torque M1a and the mandibular labial inclination torque M2a.

[0219] When the torque only includes the maxillary labial inclination torque M1a, the torque only achieves the labial inclination of the first tooth T1'.

[0220] When the torque includes the maxillary labial inclination torque M1a and the mandibular labial inclination torque M2a, the torque simultaneously achieves the labial inclination of the first jaw T1' and the second jaw T2'.

[0221] When the torque only includes the maxillary labial tilting torque M1a, the relative position of the first jaw T1' and the alveolar bone can be adjusted to make the first jaw T1' suitable for intrusion operation; the gap between the first jaw T1' and the second jaw T2' can be increased to facilitate the setting of the first protrusion structure 10' and the second protrusion structure 20'; the first jaw T1' has a certain inclination to facilitate interaction with the second jaw T2', which facilitates the intrusion and retraction of the upper and lower anterior teeth.

[0222] When the torque includes maxillary labial inclination torque M1a and mandibular labial inclination torque M2a, the relative position of the second jaw T2' and the alveolar bone can be adjusted to make the second jaw T2' suitable for intrusion operations; the deep overbite caused by the lingual inclination of the second jaw T2' can be avoided; the second jaw T2' has a certain degree of inclination, which can facilitate interaction with the first jaw T1', making it easier to achieve intrusion and retraction of the maxillary and mandibular anterior teeth.

[0223] Optionally, referring to Figure 23, in the case of deep overbite correction, the entire correction process usually needs to be divided into multiple correction steps. The absolute value of the lever arm corresponding to the maxillary labial tilt torque M1a in the Nth correction step is not less than the absolute value of the lever arm corresponding to the maxillary labial tilt torque M1a' in the N+Mth correction step, where N and M are both positive integers.

[0224] This corresponds to the degree of labial inclination of the first tooth T1' in the Nth orthodontic step being no less than the degree of labial inclination of the first tooth T1' in the N+M orthodontic step.

[0225] The absolute value of the lever arm corresponding to the mandibular tilting moment M2a in the Nth correction step is not greater than the absolute value of the lever arm corresponding to the mandibular tilting moment M2a' in the N+Mth correction step, where N and M are both positive integers.

[0226] This corresponds to the fact that the degree of labial inclination produced by the second jaw T2' in the Nth orthodontic step is no greater than the degree of labial inclination produced by the second jaw T2' in the N+M orthodontic step.

[0227] When deep overbite treatment is in the relatively early Nth orthodontic step, since the first jaw T1' and the second jaw T2' are usually relatively vertical, a relatively large labial tipping moment can be provided to the first jaw T1' to adjust the relative position of the first jaw T1' and the alveolar bone to a larger extent first. The relative position of the second jaw T2' and the alveolar bone can be left unadjusted at first, or a relatively small labial tipping moment can be provided to adjust the relative position of the second jaw T2' and the alveolar bone to a smaller extent.

[0228] Optionally, while the first jaw T1' exhibits labial inclination, the first jaw T1' may also exhibit a certain degree of indentation.

[0229] Then, when the deep overbite treatment is in the relatively late N+M treatment step, the labial inclination of the first tooth T1' has progressed to a certain extent. At this time, the labial inclination torque of the first tooth T1' can be reduced to avoid excessive labial inclination of the first tooth T1'. At the same time, the labial inclination torque of the second tooth T2' can be increased, thereby adjusting the relative position of the second tooth T2' and the alveolar bone to a greater extent.

[0230] Optionally, while the second jaw T2' exhibits labial inclination, the second jaw T2' may also exhibit a certain degree of intrusion.

[0231] Subsequently, when the labial inclination of the first jaw T1' and the second jaw T2' has reached a certain level, the deep overbite condition has also been improved to a certain extent, and there is a certain space between the first jaw T1' and the second jaw T2' to achieve absolute intrusion.

[0232] Absolute compression mainly refers to the force generated by the mutual contact between the first protrusion structure 10' and the second protrusion structure 20', which mainly achieves compression. For example, the first protrusion structure 10' can be set near or directly at the anterior incisal end Q1' of the first jaw T1', and the second protrusion structure 20' can be set near or directly at the anterior incisal end Q2' of the second jaw T2', so that a larger proportion of the force can be used to achieve compression of the first jaw T1' and the second jaw T2'.

[0233] Optionally, referring to Figure 24, the first protruding structure 10' abuts against the opposing second tooth T2' to form an abutment surface B. Here, the abutment surface B formed by the first protruding structure 10' and the second protruding structure 20' is used as an example for explanation.

[0234] At least some of the different orthodontic steps of the appliance 100 have different contact surfaces B, and different contact surfaces B correspond to different translation and / or rotation amounts.

[0235] Translation and / or rotation amounts, for example, generate torque as described above. Depending on the required translation and / or rotation amounts, different contact surfaces B can be selected.

[0236] Optionally, the parameters of different contact surfaces B are different, and the parameters include at least one of the following: the setting position of the contact surface B, the shape of the contact surface B, the position of the contact point O formed by the contact surface B, and the direction of the line of action L passing through the contact point O.

[0237] The setting position of the abutment surface B is defined as the spatial position of the abutment surface B within the installation gap S, which is the gap formed between the first jaw T1' and the second jaw T2' for installing the first protrusion structure 10'.

[0238] Optionally, the location of the contact surface B may be, for example, near the anterior incisal edge Q1' of the first jaw T1', near the anterior incisal edge Q2' of the second jaw T2', or in the area between the anterior incisal edge Q1' of the first jaw T1' and the anterior incisal edge Q2' of the second jaw T2'.

[0239] The shape of the contact surface B includes at least one of the following: the geometry of the contact surface B, and the direction of extension of the contact surface B.

[0240] Optionally, the contact surface B can be a plane or a curved surface. When the contact surface B is a plane, the geometric shape of the contact surface B can be a regular shape such as a circle, ellipse, square, triangle or other irregular shape. When the contact surface B is a curved surface, the geometric shape of the contact surface B can be defined by the curvature of the contact surface B.

[0241] The direction of extension of the contact surface B is, for example, the horizontal direction, or the direction that forms different angles with the horizontal direction.

[0242] The contact point O formed by the abutment surface B is defined as the spatial position of the geometric center or force center O of the abutment surface B within the installation gap S.

[0243] When the contact surface B is a plane, the geometric center O is defined as the center or centroid of the plane, and the force center O is defined as the resultant point of all forces acting on the plane. The force center O can overlap with the geometric center O.

[0244] When the contact surface B is a curved surface, the force center O is defined as the resultant point of all forces acting on the curved surface.

[0245] In summary, the second embodiment can achieve the target jaw position W1 by the mutual contact of the first protruding structure 10' and the second jaw T2'. The target jaw position W1 has a large biting force, which can provide a greater orthodontic force for the first jaw T1' and the second jaw T2'.

[0246] Figures 25 and 26 are schematic diagrams of the orthodontic appliance 100 according to the third embodiment of the present invention.

[0247] The orthodontic appliance 100 includes a first part 11 disposed on the lingual or incisal side Q1 corresponding to the maxillary anterior tooth T1 and a second part 12 disposed on the labial or incisal side Q2 corresponding to the mandibular anterior tooth T2.

[0248] The first part 11 and the second part 12 are configured such that when the upper and lower jaws are occluded, the first part 11 and the second part 12 abut against each other to generate a force or torque, the force or torque including at least the labial tilt force or the labial tilt torque of the corresponding maxillary anterior tooth T1, the labial tilt force or labial tilt torque causing the maxillary anterior tooth T1 to labial tilt.

[0249] In cases of deep overbite, the maxillary anterior tooth T1 covers at least part of the mandibular anterior tooth T2. It is necessary to indent the maxillary anterior tooth T1 and the mandibular anterior tooth T2 to improve the deep overbite. However, the maxillary anterior tooth T1 and the mandibular anterior tooth T2 are usually relatively vertical in their initial state. The initial relative positions of the maxillary anterior tooth T1, the mandibular anterior tooth T2 and the alveolar bone are not suitable for direct absolute indentation of the maxillary anterior tooth T1 and the mandibular anterior tooth T2. Therefore, it is necessary to first adjust the relative positions of the maxillary anterior tooth T1 and the alveolar bone as well as the relative positions of the mandibular anterior tooth T2 and the alveolar bone.

[0250] In this embodiment, at least the maxillary anterior tooth T1 is labially tilted during the orthodontic process. Firstly, the relative position of the maxillary anterior tooth T1 and the alveolar bone can be gradually adjusted to make the maxillary anterior tooth T1 suitable for intrusion. Secondly, the gap between the maxillary anterior tooth T1 and the mandibular anterior tooth T2 can be increased to facilitate the installation design of the first part 11 and the second part 12. Thirdly, the maxillary anterior tooth T1 has a certain degree of inclination, which facilitates its interaction with the mandibular anterior tooth T2, making it easier to achieve intrusion and retraction of the maxillary and mandibular anterior teeth.

[0251] During the treatment of deep overbite, if the mandibular anterior tooth T2 becomes lingually inclined, it will worsen the deep overbite. If the maxillary anterior tooth T1 becomes lingually inclined, it will cause the maxillary anterior tooth T1 and the mandibular anterior tooth T2 to interfere with each other. In this embodiment, the first part 11 is set on the lingual side of the maxillary anterior tooth T1 and the second part 12 is set on the labial side of the mandibular anterior tooth T2. By reasonably designing the first part 11 and the second part 12, the maxillary anterior tooth T1 can be labially inclined and the mandibular anterior tooth T2 can not be lingually inclined, which can effectively avoid the aggravation of deep overbite.

[0252] Optionally, the force or torque may also include the labial inclination force or the labial inclination torque corresponding to the mandibular anterior tooth T2.

[0253] In this implementation method, the mandibular anterior tooth T2 is labially tilted during the orthodontic process. Firstly, the relative position of the mandibular anterior tooth T2 and the alveolar bone can be gradually adjusted to make the mandibular anterior tooth T2 suitable for intrusion. Secondly, it can avoid the aggravation of deep overbite caused by the lingual tilt of the mandibular anterior tooth T2. Thirdly, the mandibular anterior tooth T2 has a certain degree of inclination, which facilitates its interaction with the maxillary anterior tooth T1, making it easier to achieve intrusion and retraction of the maxillary and maxillary anterior teeth.

[0254] Optionally, the labial inclination of the maxillary anterior teeth T1 and the labial inclination of the mandibular anterior teeth T2 can be generated in the same orthodontic step or in different orthodontic steps, depending on the different orthodontic needs of each orthodontic step.

[0255] Optionally, the force or torque may also include the indentation force of the corresponding upper and lower anterior teeth, which can cause the upper and lower anterior teeth to be indented or retracted.

[0256] This method can not only cause labial inclination of the maxillary anterior teeth T1 (or labial inclination of the mandibular anterior teeth T2) during the orthodontic process, but also cause intrusion and retraction of the maxillary and mandibular anterior teeth. For example, when the teeth are labially inclinated, they will be intruded or retracted. The relative position between the teeth and alveolar bone after labial inclination is more suitable for the realization of intrusion or retraction of the teeth, thereby accelerating the resolution of deep overbite problems.

[0257] Optionally, referring to Figures 26 and 27, one of the first part 11 and the second part 12 is a protrusion A1 protruding from the tooth, and the other is a protrusion A1 protruding from the tooth or a part A2 that conforms to the tooth.

[0258] The protrusion A1 is directly connected to the tooth, or the orthodontic appliance 100 also includes appliance bodies 101' and 102' with cavities S1 and S2 for accommodating the tooth, with the protrusion A1 connected to the appliance bodies 101' and 102'.

[0259] A1 protrusion refers to a protruding structure that protrudes from the teeth (or the orthodontic appliance body 101', 102').

[0260] The appliance bodies 101' and 102' are invisible aligners that match the teeth. The appliance bodies 101' and 102' can be a first appliance body 101' that matches the maxillary teeth and / or a second appliance body 102' that matches the mandibular teeth. The cavities S1 and S2 can be a first cavity S1 formed by the first appliance body 101' to accommodate the maxillary teeth and / or a second cavity S2 formed by the second appliance body 102' to accommodate the mandibular teeth.

[0261] The portion A2 that conforms to the teeth is the tooth area, or the portion A2 that conforms to the teeth is the area where the orthodontic appliance body 101', 102' is in close contact with the teeth.

[0262] The part A2 that fits the teeth refers to the area where the teeth themselves or the orthodontic appliance 101', 102' fits tightly against the teeth. The teeth themselves are, for example, the incisal edge of the anterior teeth, the labial surface of the anterior teeth, or the lingual surface of the anterior teeth.

[0263] Below, we will introduce several forms of Part 11 and Part 22.

[0264] In the first form, referring to Figure 26, both the first part 11 and the second part 12 are protrusions A1, and the two protrusions A1 are respectively connected to the first orthodontic body 101' and the second orthodontic body 102'.

[0265] Specifically, the orthodontic appliance 100 includes a first orthodontic appliance body 101' and a second orthodontic appliance body 102'. The first orthodontic appliance body 101' has a first cavity S1 for accommodating the maxillary tooth T1, and the second orthodontic appliance body 102' has a second cavity S2 for accommodating the mandibular tooth T2.

[0266] The first part 11 is located on the lingual side of the first orthodontic appliance body 101', and the first part 11 protrudes from the first orthodontic appliance body 101'. The first part 11 is integrally formed with the first orthodontic appliance body 101', or the first part 11 is an independent structure assembled to the first orthodontic appliance body 101'.

[0267] The second part 12 is located on the lip side of the second orthodontic appliance body 102', and the second part 12 protrudes from the second orthodontic appliance body 102'. The second part 12 is integrally formed with the second orthodontic appliance body 102', or the second part 12 is an independent structure assembled to the second orthodontic appliance body 102'.

[0268] In other forms, both the first part 11 and the second part 12 are protrusions A1, and both protrusions A1 can be directly connected to the teeth, or one of the two protrusions A1 can be directly connected to the teeth, while the other is connected to the first orthodontic appliance body 101' or the second orthodontic appliance body 102'.

[0269] In the second form, referring to Figure 27, one of the first part 11 and the second part 12 is a protrusion A1, and the other is a tooth-fitting part A2. The protrusion A1 is connected to the first orthodontic appliance body 101', and the tooth-fitting part A2 is the area of ​​the second orthodontic appliance body 102' corresponding to the incisal edge Q2.

[0270] Specifically, taking the first part 11 as a protrusion A1 and the second part 12 as a part A2 that fits the teeth as an example, the orthodontic appliance 100 includes a first orthodontic appliance body 101' and a second orthodontic appliance body 102'. The first orthodontic appliance body 101' has a first cavity S1 for accommodating the maxillary tooth T1, and the second orthodontic appliance body 102' has a second cavity S2 for accommodating the mandibular tooth T2.

[0271] The first part 11 is located on the lingual side of the first orthodontic appliance body 101', and the first part 11 protrudes from the first orthodontic appliance body 101'. The first part 11 is integrally formed with the first orthodontic appliance body 101', or the first part 11 is an independent structure assembled to the first orthodontic appliance body 101'.

[0272] The second part 12 is the area of ​​the second appliance body 102' corresponding to the incisal edge Q2 of the mandibular anterior tooth T2. The second part 12 is close to the incisal edge Q2 of the mandibular anterior tooth T2.

[0273] In other forms, one of the first part 11 and the second part 12 is a protrusion A1, and the other is a portion A2 that conforms to the teeth. The protrusion A1 is directly connected to the teeth and the portion A2 that conforms to the teeth is a tooth area. Alternatively, the protrusion A1 is directly connected to the teeth and the portion A2 that conforms to the teeth is an area where the orthodontic appliance body 101' and 102' are in close contact with the teeth. Alternatively, the protrusion A1 is connected to the orthodontic appliance body 101' and 102' and the portion A2 that conforms to the teeth is a tooth area.

[0274] For ease of explanation, the following description will be based on the example where both the first part 11 and the second part 12 are protrusions A1, and the two protrusions A1 are respectively connected to the first orthodontic appliance body 101' and the second orthodontic appliance body 102'.

[0275] Optionally, referring to Figure 28, when the first part 11 and the second part 12 abut against each other, the upper and lower jaws are in the target jaw position W1, the target jaw position W1 deviates from the initial jaw position W, and the occlusal force corresponding to the target jaw position W1 is greater than the initial occlusal force corresponding to the initial jaw position W.

[0276] The target jaw position W1 can be, for example, raised by the mutual abutment of the first part 11 and the second part 12, so that the target jaw position W1 formed between the upper and lower jaws deviates from the initial jaw position W before the elevation. The relatively higher target jaw position W1 corresponds to a relatively larger occlusal force.

[0277] The initial occlusal position W can be a custom occlusal position or a specific occlusal position. The initial occlusal position W has a relatively small initial occlusal force, while the target occlusal position W1 has a relatively large occlusal force. The occlusal force generated by the target occlusal position W1 can at least control the maxillary anterior teeth T1 to generate labial inclination force or labial inclination moment.

[0278] Optionally, the initial jaw position W can be the resting jaw position.

[0279] The resting jaw position can be defined as the position that the upper and lower jaws automatically find when they are in a normal relaxed state. For example, when the mouth is not chewing, swallowing, or speaking, the lower jaw is in a resting state, and the dental arches of the upper and lower jaws are naturally separated. The jaw position at this time is called the resting jaw position, and the initial biting force is zero.

[0280] The resting jaw position can also be a jaw position with a small biting force between the upper and lower jaws. For example, the jaw position when the initial biting force is less than a preset value is called the resting jaw position.

[0281] Optionally, the maxillary and mandibular opening angle corresponding to the target jaw position W1 is greater than the maxillary and mandibular opening angle corresponding to the starting jaw position W, and the maxillary and mandibular interspace corresponding to the target jaw position W1 is greater than the maxillary and mandibular interspace corresponding to the starting jaw position W.

[0282] The opening angle of the upper and lower jaws can refer to the rotation angle of the lower jaw relative to the upper jaw relative to the closed state.

[0283] The mandibular-maxillary gap can refer to the downward movement of the mandible relative to the maxilla during rotation relative to the maxilla when the mandible is in a closed state.

[0284] The target jaw position W1 can be seen as a jaw position obtained by further opening the initial jaw position W. Therefore, the target jaw position W1 has a larger opening angle and intermaxillary space compared to the initial jaw position W.

[0285] Optionally, the occlusal force corresponding to the target jaw position W1 is positively correlated with the degree of opening of the upper and lower jaws, which includes the opening angle of the upper and lower jaws or the gap between the upper and lower jaws.

[0286] When the upper and lower jaws open, the jaw muscles release to form a force state. This force state allows the first part 11 and the second part 12 to abut against each other and generate a force (i.e., the biting force corresponding to the target jaw position W1). When the opening angle of the upper and lower jaws or the gap between the upper and lower jaws is large, the greater the degree of release of the jaw muscles, the greater the force generated by the first part 11 and the second part 12 abutting against each other.

[0287] Optionally, the orthodontic appliance 100 can be implemented in various forms.

[0288] In the first implementation, referring to Figure 29, the first impedance center R1 of the maxillary anterior tooth T1 is located on the lingual side of the line of action L, and the second impedance center R2 of the mandibular anterior tooth T2 is located on the lingual side of the line of action L or on the line of action L. The line of action L is defined by the contact surface B formed by the mutual contact of the first part 11 and the second part 12.

[0289] The contact surface B is the area where the first part 11 and the second part 12 come into contact with each other. The contact surface B can be a plane or a curved surface. The line of action L is used to characterize the resultant force of the forces generated by the contact between the first part 11 and the second part 12. The line of action L passes through the geometric center O or the force center O of the contact surface B.

[0290] When the contact surface B is a plane, the line of action L is perpendicular to the plane and passes through the geometric center O or the center of force O of the plane. When the contact surface B is a curved surface, the line of action L is perpendicular to the tangent of the curved surface, and the tangent passes through the center of force O of the curved surface.

[0291] Optionally, when the contact surface B is a plane, the line of action L can be defined to pass through the geometric center O or the force center O of the plane. The geometric center O is defined as the center or centroid of the plane, and the force center O is defined as the resultant point of all forces acting on the plane. The force center O can overlap with the geometric center O.

[0292] When the contact surface B is a curved surface, the line of action L can be defined to pass through the force center O of the curved surface. The force center O is defined as the resultant point of all forces acting on the curved surface.

[0293] For descriptions of the geometric center and force center in other implementations, please refer to the description in the first implementation; further details will not be provided hereafter.

[0294] Optionally, when the first impedance center R1 of the maxillary anterior tooth T1 is located on the lingual side of the line of action L, the maxillary anterior tooth T1 can generate a non-zero labial tilting force or labial tilting torque.

[0295] When the second impedance center R2 of the mandibular anterior tooth T2 is located on the lingual side of the line of action L, the mandibular anterior tooth T2 can generate a non-zero labial tilting force or labial tilting torque.

[0296] When the second impedance center R2 of the mandibular anterior tooth T2 is located on the line of action L, the labial tilting force or labial tilting torque that the mandibular anterior tooth T2 can generate is zero, and the lingual tilting force or lingual tilting torque that can be generated is also zero.

[0297] In the first implementation, when the first part 11 and the second part 12 abut against each other and generate force, the force acts on the maxillary anterior tooth T1 to produce labial inclination. At the same time, the force acts on the mandibular anterior tooth T2 to produce labial inclination, or the mandibular anterior tooth T2 neither produces labial inclination nor lingual inclination. The labial and lingual inclination of the maxillary and mandibular anterior teeth can be controlled by controlling the relative positional relationship between the first impedance center R1, the second impedance center R2, and the line of action L.

[0298] In the second implementation, referring to Figures 30a to 31, the line of action L forms a first projection line L' at the first reference surface P1, the first impedance center R1 defined by the maxillary anterior tooth T1 has a first projection point R1' at the first reference surface P1 located on the first side E1 of the first projection line L', and the second impedance center R2 defined by the mandibular anterior tooth T2 has a second projection point R2' at the first reference surface P1 located on the first side E1 of the first projection line L' or located on the first projection line L'.

[0299] The line of action L passes through the geometric center O or force center O of the contact surface B formed by the mutual contact of the first part 11 and the second part 12. The contact surface B is the area where the first part 11 and the second part 12 are in contact with each other. The contact surface B can be a plane or a curved surface. The line of action L is used to characterize the resultant force of the forces generated by the mutual contact of the first part 11 and the second part 12.

[0300] The first side E1 includes the incisal edge Q2 of the mandibular anterior tooth T2, and the first side E1 is the right side region of the first projection line L'.

[0301] The first reference plane P1 is parallel to the sagittal plane, which is a longitudinal section that divides the entire jaw into left and right parts.

[0302] Alternatively, the first reference plane P1 passes through the line of action L and extends along the lip-tongue direction X.

[0303] Optionally, when the first projection point R1' is located on the first side E1 of the first projection line L', the maxillary anterior tooth T1 can generate a non-zero labial tilt force or labial tilt moment.

[0304] When the second projection point R2' is located on the first side E1 of the first projection line L', the mandibular anterior tooth T2 can generate a non-zero labial tilt force or labial tilt moment.

[0305] When the second projection point R2' is located on the first projection line L', the labial tilt force or labial tilt torque that the mandibular anterior tooth T2 can generate is zero, and the lingual tilt force or lingual tilt torque that can be generated is also zero.

[0306] In the second implementation, when the first part 11 and the second part 12 abut against each other and generate force, the force acts on the maxillary anterior tooth T1 to produce labial inclination, and at the same time, the force acts on the mandibular anterior tooth T2 to produce labial inclination, or the mandibular anterior tooth T2 neither produces labial inclination nor lingual inclination. The labial and lingual inclination of the maxillary and mandibular anterior teeth can be controlled by controlling the relative positional relationship between the first projection point R1', the second projection point R2', and the first projection line L'.

[0307] Optionally, in the second implementation, referring to Figure 31, there is a vertical distance between the first projection point R1' and the first projection line L', and the orthodontic device 100 in the Nth orthodontic step and the orthodontic device 100 in the N+Mth orthodontic step have a first vertical distance H1 and a second vertical distance H2, respectively. The first vertical distance H1 is not less than the second vertical distance H2, and N and M are both positive integers.

[0308] The first vertical distance H1 and the second vertical distance H2 can be used to characterize the magnitude of the labial tilt force or labial tilt moment generated by the maxillary anterior tooth T1. When the first vertical distance H1 is not less than the second vertical distance H2, it can characterize that the labial tilt force or labial tilt moment generated by the maxillary anterior tooth T1 in the Nth orthodontic step is not less than the labial tilt force or labial tilt moment generated by the maxillary anterior tooth T1 in the N+M orthodontic step.

[0309] The vertical distance between the first projection point R1' and the first projection line L' is positively correlated with the labial tilt force or labial tilt moment generated by the maxillary anterior tooth T1. The labial tilt force or labial tilt moment generated by the maxillary anterior tooth T1 in each orthodontic step can be adjusted by controlling the vertical distance.

[0310] Optionally, continuing with Figure 31, there is a vertical distance between the second projection point R2' and the first projection line L'. The orthodontic appliance 100 in the Nth orthodontic step and the orthodontic appliance 100 in the N+Mth orthodontic step have a third vertical distance H3 and a fourth vertical distance H4, respectively. The third vertical distance H3 is not greater than the fourth vertical distance H4, and N and M are both positive integers.

[0311] The third vertical distance H3 and the fourth vertical distance H4 can be used to characterize the magnitude of the labial tilt force or labial tilt moment generated by the mandibular anterior tooth T2. When the third vertical distance H3 is not greater than the fourth vertical distance H4, it can be used to characterize that the labial tilt force or labial tilt moment generated by the mandibular anterior tooth T2 in the Nth orthodontic step is not greater than the labial tilt force or labial tilt moment generated by the mandibular anterior tooth T2 in the N+M orthodontic step.

[0312] The vertical distance between the second projection point R2' and the first projection line L' is positively correlated with the labial tilt force or labial tilt moment generated by the mandibular anterior tooth T2. The labial tilt force or labial tilt moment generated by the mandibular anterior tooth T2 in each orthodontic step can be adjusted by controlling the vertical distance.

[0313] When deep overbite treatment is in the relatively early Nth orthodontic step, since the maxillary anterior teeth T1 and mandibular anterior teeth T2 are usually relatively vertical, a relatively large labial tilt force or labial tilt moment can be provided to adjust the relative position of the maxillary anterior teeth T1 and alveolar bone to a larger extent first. The relative position of the mandibular anterior teeth T2 and alveolar bone can be left unadjusted at first, or a relatively small labial tilt force or labial tilt moment can be provided to adjust the relative position of the mandibular anterior teeth T2 and alveolar bone to a smaller extent.

[0314] Optionally, while the maxillary anterior T1 is labially incised, there may also be a certain degree of intrusion of the maxillary anterior T1.

[0315] Then, when the deep overbite treatment is in the relatively late N+M treatment step, the labial inclination of the maxillary anterior tooth T1 has progressed to a certain extent. At this time, the labial inclination force or labial inclination moment of the maxillary anterior tooth T1 can be reduced to avoid excessive labial inclination of the maxillary anterior tooth T1. At the same time, the labial inclination force or labial inclination moment of the mandibular anterior tooth T2 can be increased, thereby adjusting the relative position of the mandibular anterior tooth T2 and the alveolar bone to a greater extent.

[0316] Optionally, while the mandibular anterior T2 is labially incised, there may also be a certain degree of intrusion of the mandibular anterior T2.

[0317] Then, when the labial inclination of the maxillary anterior tooth T1 and the mandibular anterior tooth T2 has reached a certain level, the deep overbite has also been improved to a certain extent, and there is a certain space between the maxillary anterior tooth T1 and the mandibular anterior tooth T2 to achieve absolute intrusion.

[0318] Absolute compression mainly refers to the force generated by the mutual contact between the first part 11 and the second part 12, which mainly achieves compression. For example, the first part 11 can be set near the incisal end Q1 of the maxillary anterior tooth T1 or directly set at the incisal end Q1, and the second part 12 can be set near the incisal end Q2 of the mandibular anterior tooth T2 or directly set at the incisal end Q2. This allows a larger proportion of the force to be used to compress the maxillary anterior tooth T1 and the mandibular anterior tooth T2.

[0319] In the third implementation, referring to Figures 32a and 32b, the line of action L forms a first projection line L' at the first reference surface P1, and the line segment D connecting the impedance centers forms a first projection line segment D' at the first reference surface P1. The first projection line L' and the first projection line segment D' have no intersection point or only intersect at the endpoint Q3 of the first projection line segment D' corresponding to the mandibular anterior tooth T2. The endpoint Q3 is the projection point of the second impedance center R2 in the first reference surface P1.

[0320] The line of action L passes through the geometric center O or force center O of the contact surface B formed by the mutual contact of the first part 11 and the second part 12. The contact surface B is the area where the first part 11 and the second part 12 are in contact with each other. The contact surface B can be a plane or a curved surface. The line of action L is used to characterize the resultant force of the forces generated by the mutual contact of the first part 11 and the second part 12.

[0321] The two endpoints of the line segment D connecting the impedance centers are the first impedance center R1 defined by the maxillary anterior tooth T1 and the second impedance center R2 defined by the mandibular anterior tooth T2.

[0322] The first reference plane P1 is parallel to the sagittal plane, which is a longitudinal section that divides the entire jaw into left and right parts.

[0323] Alternatively, the first reference plane P1 passes through the line of action L and extends along the lip-tongue direction X.

[0324] Optionally, when there is no intersection between the first projection line L' and the first projection line segment D', the maxillary anterior tooth T1 can generate a non-zero labial tilt force or labial tilt moment, and the mandibular anterior tooth T2 can generate a non-zero labial tilt force or labial tilt moment.

[0325] When the first projection line L' and the first projection line segment D' intersect only at the endpoint Q3 of the mandibular anterior tooth T2 corresponding to the first projection line segment D', the maxillary anterior tooth T1 can generate a non-zero labial tilting force or labial tilting moment, while the mandibular anterior tooth T2 can generate a zero labial tilting force or labial tilting moment, and the lingual tilting force or lingual tilting moment can also be zero.

[0326] In the third implementation, when the first part 11 and the second part 12 abut against each other and generate force, the force acts on the maxillary anterior tooth T1 to produce labial inclination. At the same time, the force acts on the mandibular anterior tooth T2 to produce labial inclination, or the mandibular anterior tooth T2 neither produces labial inclination nor lingual inclination. The labial and lingual inclination of the maxillary and mandibular anterior teeth can be controlled by controlling the relative positional relationship between the first projection line L' and the first projection line segment D'.

[0327] In the fourth implementation, referring to Figure 33, the geometric center O or force center O of the contact surface B is located on the lip side of the line segment D connecting the impedance centers.

[0328] The contact surface B is the contact surface formed by the mutual contact of the first part 11 and the second part 12. The contact surface B can be a plane or a curved surface.

[0329] The two endpoints of the line segment D connecting the impedance centers are the first impedance center R1 defined by the maxillary anterior tooth T1 and the second impedance center R2 defined by the mandibular anterior tooth T2.

[0330] When the geometric center O or the force center O of the contact surface B is located on the labial side of the line segment D connecting the impedance centers, it is easy to achieve the labial inclination of the maxillary anterior tooth T1 and the labial inclination of the mandibular anterior tooth T2. The labial and lingual inclination of the maxillary and mandibular anterior teeth can be controlled by controlling the relative position of the geometric center O or the force center O and the line segment D connecting the impedance centers.

[0331] In the fifth implementation, referring to Figures 34a to 35, the impedance center connecting line segment D forms the second projection line segment D” at the second reference surface P2. The geometric center O of the contact surface B or the force center O at the second reference surface P2 is located at the third projection point O’ on the second side E2 of the second projection line segment D”.

[0332] The two endpoints of the line segment D connecting the impedance centers are the first impedance center R1 defined by the maxillary anterior tooth T1 and the second impedance center R2 defined by the mandibular anterior tooth T2.

[0333] The contact surface B is the contact surface formed by the mutual contact of the first part 11 and the second part 12.

[0334] The second reference plane P2 is parallel to the sagittal plane, which is a longitudinal section that divides the entire jaw into left and right parts.

[0335] Alternatively, the second reference surface P2 can be determined by the geometric center O or force center O of the contact surface B, the first impedance center R1, and the second impedance center R2, i.e., the second reference surface P2 is determined by three points.

[0336] Alternatively, the second reference surface P2 passes through at least one of the geometric center O or force center O of the contact surface B, the first impedance center R1, and the second impedance center R2 and extends along the lip direction X, i.e., at least one point and the lip direction X determine the second reference surface P2.

[0337] The second side E2 includes the incisal edge Q1 of the maxillary anterior tooth T1, and the second side E2 is the left region of the second projection segment D”.

[0338] When the third projection point O' is located on the second side E2 of the second projection line segment D”, it is convenient to achieve the labial inclination of the maxillary anterior tooth T1 and the mandibular anterior tooth T2. The labial and lingual inclination of the maxillary and mandibular anterior teeth can be controlled by controlling the relative position of the third projection point O' and the second projection line segment D”.

[0339] Optionally, in the fifth implementation, in conjunction with Figure 35, there is a vertical distance between the third projection point O' and the second projection line segment D”. The orthodontic device 100 in the Nth orthodontic step and the orthodontic device 100 in the N+Mth orthodontic step have a first vertical distance K1 and a second vertical distance K2, respectively. The second vertical distance K2 is not less than the first vertical distance K1, and N and M are both positive integers.

[0340] The first vertical distance K1 and the second vertical distance K2 can be used to characterize the design space of the labial tilt force or labial tilt moment of the maxillary and mandibular anterior teeth. When the vertical distance is larger, the design space of the labial tilt force or labial tilt moment of the maxillary and mandibular anterior teeth is larger, and a relatively larger labial tilt force or labial tilt moment corresponding to the maxillary anterior tooth T1 or a relatively larger labial tilt force or labial tilt moment corresponding to the mandibular anterior tooth T2 can be designed, thereby achieving a larger maxillary labial tilt or mandibular labial tilt.

[0341] Optionally, the above-mentioned implementation forms can exist independently or in combination. For example, the third and fourth implementation forms can be combined to form a new implementation form, that is, controlling that there is no intersection between the first projection line L' and the first projection line segment D' or that they only intersect at the endpoint Q3 of the mandibular anterior tooth T2 corresponding to the first projection line segment D', and at the same time controlling that the geometric center O or the force center O of the contact surface B is located on the labial side of the impedance center connecting line segment D.

[0342] Optionally, for various implementations, referring to Figure 36, the first part 11 corresponds to the N-sized maxillary anterior tooth T1, and the second part 12 corresponds to the M-sized mandibular anterior tooth T2.

[0343] Alternatively, the first part 11' is set to connect the adjacent tooth space G1 of the maxillary anterior tooth T1 of the Nth tooth, and the first part 11' may also extend from the adjacent tooth space G1 to the maxillary anterior tooth T1 of the Nth tooth; the second part 12' is set to connect the adjacent tooth space G2 of the mandibular anterior tooth T2 of the Mth tooth, and the second part 12' may also extend from the adjacent tooth space G2 to the mandibular anterior tooth T2 of the Mth tooth.

[0344] Optionally, the first impedance center R1 can be the impedance center of maxillary anterior tooth T1 (N) or the two impedance centers of maxillary anterior tooth T1 (N) and maxillary anterior tooth T1 (N') located on both sides of the interdental space G1.

[0345] When the first impedance center R1 is the two impedance centers of maxillary anterior teeth T1 and T1 of maxillary anterior teeth N', the midpoint of the two impedance centers can be used as the first impedance center R1 used in the aforementioned implementation forms. Alternatively, each impedance center can be used as the first impedance center R1 used in the aforementioned implementation forms, and then two processing steps can be performed based on the two first impedance centers R1.

[0346] The second impedance center R2 is the impedance center of mandibular anterior tooth T2 of size M, or the two impedance centers of mandibular anterior tooth T2 of size M and mandibular anterior tooth T2 located on both sides of the interdental space.

[0347] When the second impedance center R2 is the two impedance centers of mandibular anterior teeth T2 of size M and mandibular anterior teeth T2 of size M', the midpoint of the two impedance centers can be used as the second impedance center R2 used in the aforementioned multiple implementation forms, or each impedance center can be used as the second impedance center R2 used in the aforementioned multiple implementation forms, and then two processing steps are performed based on the two second impedance centers R2 respectively.

[0348] Optionally, various design options are available for different orthodontic steps.

[0349] In the first design, referring to Figure 37, the line of action L forms a first acute angle α1 with the first tooth long axis Z1 of the maxillary anterior tooth T1, and the first acute angle α1 of the appliance 100 in the Nth orthodontic step is not less than the first acute angle α1 of the appliance 100 in the N+Mth orthodontic step.

[0350] Optionally, the line of action L and the long axis Z1 of the first tooth can be projected onto the same reference plane to obtain the first acute angle α1, which is oriented toward the mandibular anterior tooth T2.

[0351] The first acute angle α1 can be used to characterize the magnitude of the labial tilting force or labial tilting moment generated by the maxillary anterior tooth T1. When the first acute angle α1 of the appliance 100 in the Nth orthodontic step is not less than the first acute angle α1 of the appliance 100 in the N+Mth orthodontic step, it can characterize that the labial tilting force or labial tilting moment generated by the maxillary anterior tooth T1 in the Nth orthodontic step is not less than the labial tilting force or labial tilting moment generated by the maxillary anterior tooth T1 in the N+Mth orthodontic step.

[0352] The geometric center O or force center O of the contact surface B through which the line of action L passes is located on the lingual side of the long axis Z1 of the first tooth (the right side region of the long axis Z1 of the first tooth). When the geometric center O or force center O of the contact surface B remains approximately unchanged, the first acute angle α1 is positively correlated with the labial tilt force or labial tilt torque generated by the maxillary anterior tooth T1. The labial tilt force or labial tilt torque generated by the maxillary anterior tooth T1 in each orthodontic step can be adjusted by controlling the first acute angle α1.

[0353] The line of action L forms a second acute angle α2 with the second tooth long axis Z2 of the mandibular anterior tooth T2. The second acute angle α2 of the appliance 100 in the Nth orthodontic step is not less than the second acute angle α2 of the appliance 100 in the N+Mth orthodontic step.

[0354] Optionally, the line of action L and the long axis Z2 of the second tooth can be projected onto the same reference plane to obtain the second acute angle α2, which is oriented toward the maxillary anterior tooth T1.

[0355] The second acute angle α1 can be used to characterize the magnitude of the labial tilting force or labial tilting moment generated by the mandibular anterior tooth T2. When the second acute angle α2 of the appliance 100 in the Nth orthodontic step is not less than the second acute angle α2 of the appliance 100 in the N+Mth orthodontic step, it can characterize that the labial tilting force or labial tilting moment generated by the mandibular anterior tooth T2 in the Nth orthodontic step is not greater than the labial tilting force or labial tilting moment generated by the mandibular anterior tooth T2 in the N+Mth orthodontic step.

[0356] The geometric center O or force center O of the contact surface B through which the line of action L passes is located on the labial side of the long axis Z2 of the second tooth (the left side region of the long axis Z2 of the second tooth). When the geometric center O or force center O of the contact surface B remains approximately unchanged, the second acute angle α2 is inversely correlated with the labial tilt force or labial tilt moment generated by the mandibular anterior tooth T2. The labial tilt force or labial tilt moment generated by the mandibular anterior tooth T2 in each orthodontic step can be adjusted by controlling the second acute angle α2.

[0357] In the second design, referring to Figure 38, the first part 11 and the second part 12 of the Nth correction step abut against each other to generate a first torque M1, and the first part 11 and the second part 12 of the N+Mth correction step abut against each other to generate a second torque M2. The first torque M1 includes only the maxillary labial tilt torque M11 or the first torque M1 includes the maxillary labial tilt torque M11 and the mandibular labial tilt torque M12. The second torque M2 includes the maxillary labial tilt torque M21 and the mandibular labial tilt torque M22. N and M are both positive integers.

[0358] When the first torque M1 only includes the maxillary labial inclination torque M11, the first torque M1 only achieves the labial inclination of the maxillary anterior tooth T1.

[0359] When the first torque M1 includes the maxillary labial tilt torque M11 and the mandibular labial tilt torque M12, the first torque M1 simultaneously achieves the labial tilt of the maxillary anterior tooth T1 and the labial tilt of the mandibular anterior tooth T2.

[0360] When the second torque M2 includes the maxillary labial inclination torque M21 and the mandibular labial inclination torque M22, the second torque M2 simultaneously achieves the labial inclination of the maxillary anterior tooth T1 and the mandibular anterior tooth T2.

[0361] The absolute value of the lever arm corresponding to the maxillary labial inclination torque M11 in the first torque M1 is not less than the absolute value of the lever arm corresponding to the maxillary labial inclination torque M21 in the second torque M2. That is, the degree of labial inclination produced by the maxillary anterior tooth T1 in the Nth orthodontic step is not less than the degree of labial inclination produced by the maxillary anterior tooth T1 in the N+Mth orthodontic step.

[0362] The absolute value of the lever arm corresponding to the mandibular labial inclination torque M12 in the first torque M1 is not greater than the absolute value of the lever arm corresponding to the mandibular labial inclination torque M22 in the second torque M2. That is, the degree of labial inclination produced by the mandibular anterior tooth T2 in the Nth orthodontic step is not greater than the degree of labial inclination produced by the mandibular anterior tooth T2 in the N+Mth orthodontic step.

[0363] In the two design forms mentioned above, when deep overbite treatment is in the relatively early Nth treatment step, since the maxillary anterior teeth T1 and mandibular anterior teeth T2 are usually relatively vertical, a relatively large labial tilt force or labial tilt moment can be provided to adjust the relative position of the maxillary anterior teeth T1 and alveolar bone to a larger extent first. The relative position of the mandibular anterior teeth T2 and alveolar bone can be left unadjusted first, or a relatively small labial tilt force or labial tilt moment can be provided to adjust the relative position of the mandibular anterior teeth T2 and alveolar bone to a smaller extent.

[0364] Optionally, while the maxillary anterior T1 is labially incised, there may also be a certain degree of intrusion of the maxillary anterior T1.

[0365] Then, when the deep overbite treatment is in the relatively late N+M treatment step, the labial inclination of the maxillary anterior tooth T1 has progressed to a certain extent. At this time, the labial inclination force or labial inclination moment of the maxillary anterior tooth T1 can be reduced to avoid excessive labial inclination of the maxillary anterior tooth T1. At the same time, the labial inclination force or labial inclination moment of the mandibular anterior tooth T2 can be increased, thereby adjusting the relative position of the mandibular anterior tooth T2 and the alveolar bone to a greater extent.

[0366] Optionally, while the mandibular anterior T2 is labially incised, there may also be a certain degree of intrusion of the mandibular anterior T2.

[0367] Then, when the labial inclination of the maxillary anterior tooth T1 and the mandibular anterior tooth T2 has reached a certain level, the deep overbite has also been improved to a certain extent, and there is a certain space between the maxillary anterior tooth T1 and the mandibular anterior tooth T2 to achieve absolute intrusion.

[0368] Absolute compression mainly refers to the force generated by the mutual contact between the first part 11 and the second part 12, which mainly achieves compression. For example, the first part 11 can be set near the incisal end Q1 of the maxillary anterior tooth T1 or directly set at the incisal end Q1, and the second part 12 can be set near the incisal end Q2 of the mandibular anterior tooth T2 or directly set at the incisal end Q2. This allows a larger proportion of the force to be used to compress the maxillary anterior tooth T1 and the mandibular anterior tooth T2.

[0369] Optionally, referring to Figure 39, at least some of the orthodontic appliances 100 in different orthodontic steps have a first part 11 and a second part 12 with different parameters, so that the orthodontic appliances 100 in at least two orthodontic steps can be controlled to produce different labial inclinations of the maxillary and mandibular anterior teeth.

[0370] The first part 11 and the second part 12 of different orthodontic steps correspond to the same tooth area. That is, the force generated by the mutual contact between the first part 11 and the second part 12 of different orthodontic steps is used to correct the same tooth area. For example, the first part 11 and the second part 12 of different orthodontic steps are both used to correct the Nth maxillary anterior tooth T1 and the Mth mandibular anterior tooth T2.

[0371] The parameters include at least one of the following: the setting position of the contact surface B formed by the first part 11 and the second part 12 abutting each other, the shape of the contact surface B, the position of the geometric center O or the force center O of the contact surface B, and the direction of the line of action L passing through the geometric center O or the force center O.

[0372] The location of the abutment surface B is defined as the spatial position of the abutment surface B within the accommodating gap S', where the accommodating gap S' is the gap formed between the upper and lower jaws to accommodate the first part 11 and the second part 12.

[0373] Optionally, the location of the contact surface B may be, for example, the incisal edge Q1 near the maxillary anterior tooth T1, the incisal edge Q2 near the mandibular anterior tooth T2, or the area between the incisal edge Q1 of the maxillary anterior tooth T1 and the incisal edge Q2 of the mandibular anterior tooth T2.

[0374] The shape of the contact surface B includes at least one of the following: the geometry of the contact surface B, and the direction of extension of the contact surface B.

[0375] Optionally, the contact surface B can be a plane or a curved surface. When the contact surface B is a plane, the geometric shape of the contact surface B can be a regular shape such as a circle, ellipse, square, triangle or other irregular shape. When the contact surface B is a curved surface, the geometric shape of the contact surface B can be defined by the curvature of the contact surface B.

[0376] The direction of extension of the contact surface B is, for example, the horizontal direction, or the direction that forms different angles with the horizontal direction.

[0377] The position of the geometric center O or force center O of the contact surface B is defined as the spatial position of the geometric center O or force center O of the contact surface B within the accommodating gap S'.

[0378] Optionally, the location of the geometric center O or the force center O of the contact surface B is mainly determined by the shape of the contact surface B.

[0379] When the contact surface B is a plane, the geometric center O is defined as the center or centroid of the plane, and the force center O is defined as the resultant point of all forces acting on the plane. The force center O can overlap with the geometric center O.

[0380] When the contact surface B is a curved surface, the force center O is defined as the resultant point of all forces acting on the curved surface.

[0381] At least one parameter of the first part 11 and the second part 12 of the Nth and N+M orthodontic steps are different to produce different labial inclinations of the maxillary and mandibular anterior teeth.

[0382] In summary, the third embodiment ensures that the maxillary anterior tooth T1 exhibits labial inclination during orthodontic treatment. Firstly, the relative position of the maxillary anterior tooth T1 and the alveolar bone can be gradually adjusted to make the maxillary anterior tooth T1 suitable for intrusion. Secondly, the gap between the maxillary anterior tooth T1 and the mandibular anterior tooth T2 can be increased to facilitate the installation design of the first part 11 and the second part 12. Thirdly, the maxillary anterior tooth T1 has a certain degree of inclination, which facilitates its interaction with the mandibular anterior tooth T2, thereby facilitating the intrusion and retraction of the anterior teeth.

[0383] During the treatment of deep overbite, if the mandibular anterior tooth T2 becomes lingually inclined, it will worsen the deep overbite. If the maxillary anterior tooth T1 becomes lingually inclined, it will cause the maxillary anterior tooth T1 and the mandibular anterior tooth T2 to interfere with each other. The first part 11 of this invention is set on the lingual side of the maxillary anterior tooth T1, and the second part 12 is set on the labial side of the mandibular anterior tooth T2. By reasonably designing the first part 11 and the second part 12, the maxillary anterior tooth T1 can be labially inclined and the mandibular anterior tooth T2 can be kept from lingually inclined, which can effectively avoid the aggravation of deep overbite.

[0384] During the orthodontic process, this invention can not only cause labial inclination of the maxillary anterior teeth T1 (or labial inclination of the mandibular anterior teeth T2), but also cause intrusion and retraction of the maxillary and mandibular anterior teeth. For example, when the teeth are labially inclinated, they will be intruded or retracted. The relative position between the teeth and alveolar bone after labial inclination is more suitable for the realization of intrusion or retraction of the teeth, thereby accelerating the resolution of deep overbite problems.

[0385] Referring to Figures 40 to 42, this is a schematic diagram of the design method of the orthodontic system 500 according to the fourth embodiment of the present invention.

[0386] The design method for the 500 orthodontic system includes the following steps:

[0387] Step S1: Obtain the design quantities of the target region of the digital model of the upper and lower jaws. The design quantities include the translation and / or rotation of the target region.

[0388] Optionally, the digital model 300 of the upper and lower jaws includes a digital model 100a of the upper jaw and a digital model 200a of the lower jaw. The digital model 300 of the upper and lower jaws can be a three-dimensional digital dental model. The digital model 300 of the upper and lower jaws can be a complete dental model or a partial dental model.

[0389] There are multiple ways to obtain the digital model 300 of the upper and lower jaws. For example, the digital model 300 of the upper and lower jaws can be obtained or received from external sources, or it can be retrieved from internal storage. Alternatively, the digital model 300 of the upper and lower jaws can be obtained after some data processing.

[0390] "Target area" refers to the area in the digital model 300 of the upper and lower jaws that includes the teeth to be treated. The target area can be the anterior or posterior tooth area of ​​the digital model 300 of the upper and lower jaws. "Translation and / or rotation of the target area" refers to the translation and / or rotation required for the teeth to be treated to reach a certain preset position. The preset position can be the middle position in the entire orthodontic process or the final target position of the entire orthodontic process.

[0391] Step S2: Determine the design parameters of the guide plate structure 400 based on the design quantity. The guide plate structure 400 includes a first guide plate 41 and a second guide plate 42.

[0392] Step S3: Based on the design parameters, add a first guide plate 41 to the target area of ​​the maxillary digital model 100a, and add a second guide plate 42 to the target area of ​​the mandibular digital model 200a.

[0393] Optionally, the design parameters of the guide plate structure 400 can be used to reflect the design amount of the target area. Referring to Figure 42, when the corresponding orthodontic system 500 is formed according to the design method, the orthodontic system 500 includes a first orthodontic appliance 10a corresponding to the maxillary teeth and a second orthodontic appliance 20a corresponding to the mandibular teeth. The first orthodontic appliance 10a includes a first part 11 corresponding to the first guide plate 41, and the second orthodontic appliance 20a includes a second part 12 corresponding to the second guide plate 42. When the patient wears the first orthodontic appliance 10a and the second orthodontic appliance 20a, the first part 11 and the second part 12 abut against each other to provide additional orthodontic force, which corresponds to the completion of part or all of the design amount.

[0394] This embodiment determines the design parameters of the guide plate structure 400 based on the design quantity of the target area of ​​the digital model 300 of the upper and lower jaws. Compared with the standard guide plate structure in the prior art, the guide plate structure 400 added in this embodiment can more specifically complete the design quantity, and the design of the guide plate structure 400 is more personalized.

[0395] Optionally, one of the first guide plate 41 and the second guide plate 42 protrudes beyond the protrusion A1a of the single jaw digital model, and the other protrudes beyond the protrusion A1a of the single jaw digital model or a part of the single jaw digital model A2a, with the protrusion added to the labial or lingual side of the single jaw digital model.

[0396] The following describes several forms of the first guide plate 41 and the second guide plate 42.

[0397] In the first form, referring to Figure 43, both the first guide plate 41 and the second guide plate 42 are protrusions A1a, and the two protrusions A1a are respectively connected to the target area of ​​the maxillary digital model 100a and the target area of ​​the mandibular digital model 20a.

[0398] In the second implementation, referring to Figure 44, the first guide plate 41 is the protrusion A1a, the first guide plate 41 is connected to the target area of ​​the maxillary digital model 100a, and the second guide plate 42 is part of the area A2a of the mandibular digital model 200a.

[0399] Optionally, the design parameters include at least one of the following: the setting position of the guide plate structure 400, the shape of the abutment surface B, the position of the contact point O formed by the abutment surface B, and the direction of the line of action L passing through the contact point O.

[0400] The installation position of the guide plate structure 400 is defined as the installation position of the guide plate structure 400 within the installation gap S, where the installation gap S is the gap between the installation guide plate structure 400 formed between the digital models of the upper and lower jaws 300.

[0401] Optionally, taking the guide structure 400 added to the anterior tooth region of the upper and lower jaw digital model 300 as an example, the location of the guide structure 400 may be, for example, the incisal edge Q1 near the maxillary anterior tooth T1, the incisal edge Q2 near the mandibular anterior tooth T2, or the area between the incisal edge Q1 of the maxillary anterior tooth T1 and the incisal edge Q2 of the mandibular anterior tooth T2.

[0402] The contact surface B is defined as the boundary area formed when the first guide plate 41 and the second guide plate 42 abut against each other.

[0403] The shape of the contact surface B includes at least one of the following: the geometry of the contact surface B, and the direction of extension of the contact surface B.

[0404] Optionally, the contact surface B can be a plane or a curved surface. When the contact surface B is a plane, the geometric shape of the contact surface B can be a regular shape such as a circle, ellipse, square, triangle or other irregular shape. When the contact surface B is a curved surface, the geometric shape of the contact surface B can be defined by the curvature of the contact surface B.

[0405] The direction of extension of the contact surface B is, for example, the horizontal direction, or the direction that forms different angles with the horizontal direction.

[0406] The contact point O is defined as the spatial position of the geometric center or force center of the contact surface B within the installation gap S.

[0407] Optionally, the geometric center or force center of the contact surface B can be defined as the contact point O formed at the contact surface B.

[0408] When the contact surface B is a plane, the geometric center O is defined as the center or centroid of the plane, and the force center O is defined as the resultant point of all forces acting on the plane. The force center O can overlap with the geometric center O.

[0409] When the contact surface B is a curved surface, the force center O is defined as the resultant point of all forces acting on the curved surface.

[0410] Optionally, referring to Figures 45 to 49, step S2 specifically includes:

[0411] Step S21: Determine the force and / or torque in the target area based on the design parameters.

[0412] Optionally, the force and / or torque includes at least one of the following: a first force F10 and / or a first torque M10 corresponding to the target area of ​​the maxillary digital model 100a, and a second force F20 and / or a second torque M20 corresponding to the target area of ​​the mandibular digital model 200a.

[0413] "Force in the target area" includes the magnitude and direction of the force, and "torque in the target area" includes the magnitude and direction of the torque.

[0414] When the design quantity mainly corresponds to the target area of ​​the maxillary digital model 100a, only the first force F10 and / or the first torque M10 corresponding to the target area of ​​the maxillary digital model 100a can be considered. That is, it is determined which guide plate structure 400 to add can make the tooth to be treated with the added guide plate structure 400 generate the first force F10 and / or the first torque M10, and the first force F10 and / or the first torque M10 can drive the tooth to be treated to generate the translation and / or rotation corresponding to the design quantity.

[0415] To avoid unnecessary translation and / or rotation of the target area of ​​the mandibular digital model 200a, when the design quantity mainly corresponds to the target area of ​​the maxillary digital model 100a, the first force F10 and / or the first torque M10 corresponding to the target area of ​​the maxillary digital model 100a and the second force F20 and / or the second torque M20 corresponding to the target area of ​​the mandibular digital model 200a can be considered simultaneously.

[0416] Similarly, when the design quantity mainly corresponds to the target area of ​​the mandibular digital model 200a, only the second force F20 and / or the second torque M20 corresponding to the target area of ​​the mandibular digital model 200a can be considered. Alternatively, the first force F10 and / or the first torque M10 corresponding to the target area of ​​the maxillary digital model 100a and the second force F20 and / or the second torque M20 corresponding to the target area of ​​the mandibular digital model 200a can be considered simultaneously.

[0417] When the design quantity corresponds to the target area of ​​the maxillary digital model 100a and the target area of ​​the mandibular digital model 200a, the first force F10 and / or the first torque M10 corresponding to the target area of ​​the maxillary digital model 100a and the second force F20 and / or the second torque M20 corresponding to the target area of ​​the mandibular digital model 200a can be considered simultaneously.

[0418] Optionally, the relationship between the first force F10 and the second force F20 can be considered, such as the directional relationship and magnitude relationship between the first force F10 and the second force F20. Alternatively, the relationship between the first torque M10 and the second torque M20 can be considered, such as the directional relationship and magnitude relationship between the first torque M10 and the second torque M20.

[0419] Step S22: Determine the design parameters of the guide plate structure 400 based on the force and / or torque.

[0420] Optionally, step S22 specifically includes:

[0421] Step S221: Determine the position of the contact point O and the direction of the line of action L based on the force and / or torque.

[0422] Optionally, taking the anterior tooth region of the upper and lower jaw digital model 300 as an example, and with forces and / or torques including a first force F10, a first torque M10, a second force F20, and a second torque M20, the maxillary anterior tooth T1 includes a first impedance center R1, the first force F10 is a force parallel to the extension line L1 of the first major axis of the maxillary anterior tooth T1, the extension line L1 of the first major axis passes through the first impedance center R1, and the first torque M10 is the torque formed at the first impedance center R1; the mandibular anterior tooth T2 includes a second impedance center R2, the second force F20 is a force parallel to the extension line L2 of the second major axis of the mandibular anterior tooth T2, the extension line L2 of the second major axis passes through the second impedance center R2, and the second torque M20 is the torque formed at the second impedance center R2.

[0423] The first force F10 and the second force F20 are components of the force F. Therefore, the first force F10 is determined by the angle between the extension line L1 of the first major axis and the line of action L and the force F. The second force F20 is determined by the angle between the extension line L2 of the second major axis and the line of action L and the force F. The first torque M10 is determined by the positional relationship between the first impedance center R1 and the line of action L and the force F. The second torque M20 is determined by the positional relationship between the second impedance center R2 and the line of action L and the force F.

[0424] When the first force F10, the first torque M10, the second force F20, and the second torque M2 are fixed values, since the first impedance center R1, the second impedance center R2, the first major axis extension line L1, and the second major axis extension line L2 are fixed, the spatial position and size of the line of action L can be determined according to the aforementioned relationship. The spatial position of the line of action L corresponds to the position of the contact point O and the direction of the line of action L.

[0425] Step S222: Determine the guide plate structure 400 based on the position of the contact point O and the direction of the line of action L.

[0426] Optionally, the location of the guide plate structure 400 and the shape of the contact surface B can be determined based on the location of the contact point O and the direction of the line of action L.

[0427] Optionally, for example, a standard guide plate structure can be added to a suitable position in the target area of ​​the digital model 300 of the upper and lower jaws (e.g., a position with a large addition space), and then the standard guide plate structure can be adjusted according to the obtained contact point O position and the action line L direction to obtain the required guide plate structure 400; or, the required guide plate structure 400 can be obtained directly according to the obtained contact point O position and the action line L direction.

[0428] Optionally, step S22 specifically includes:

[0429] Step S221': Determine the magnitude of the force F along the line of action L based on the force and / or torque.

[0430] Optionally, taking the anterior tooth region of the upper and lower jaw digital model 300 as an example, and the force and / or torque including the first force F10, the first torque M10, the second force F20 and the second torque M20, when the first force F10, the first torque M10, the second force F20 and the second torque M2 are fixed values, since the first impedance center R1, the second impedance center R1, the first major axis extension line L1 and the second major axis extension line L2 are fixed, the magnitude of the applied force F can be determined according to the aforementioned relationship.

[0431] Step S222': Determine the occlusal force of the target area of ​​the digital model 300 of the upper and lower jaws based on the magnitude of the force F.

[0432] Step S223': Determine the target jaw position W1 based on the occlusal force. The target jaw position W1 is the jaw position formed when the first guide plate 41 and the second guide plate 42 abut against each other.

[0433] Optionally, when the first guide plate 41 and the second guide plate 42 abut against each other, the occlusal force applied to the target area of ​​the digital model 300 of the upper and lower jaws will be converted into an action force F between the first guide plate 41 and the second guide plate 42, and the greater the occlusal force, the greater the action force F.

[0434] Optionally, the target jaw position W1 deviates from the initial jaw position W, and the occlusal force corresponding to the target jaw position W1 is greater than the initial occlusal force corresponding to the initial jaw position W.

[0435] The target jaw position W1 can be achieved by elevating the maxilla through the mutual contact of the first guide plate 41 and the second guide plate 42, so that the target jaw position W1 formed between the upper and lower jaws deviates from the initial jaw position W before elevation. The relatively higher target jaw position W1 corresponds to a relatively larger occlusal force.

[0436] The initial jaw position W can be a custom jaw position or a specific jaw position. The initial jaw position W has a relatively small initial occlusal force, while the target jaw position W1 has a relatively large occlusal force.

[0437] Optionally, the initial jaw position W can be the resting jaw position.

[0438] The resting jaw position can be defined as the position that the upper and lower jaws automatically find when they are in a normal relaxed state. For example, when the mouth is not chewing, swallowing, or speaking, the lower jaw is in a resting state, and the dental arches of the upper and lower jaws are naturally separated. The jaw position at this time is called the resting jaw position, and the initial biting force is zero.

[0439] The resting jaw position can also be a jaw position with a small biting force between the upper and lower jaws. For example, the jaw position when the initial biting force is less than a preset value is called the resting jaw position.

[0440] Optionally, the maxillary and mandibular opening angle corresponding to the target jaw position W1 is greater than the maxillary and mandibular opening angle corresponding to the starting jaw position W, and the maxillary and mandibular interspace corresponding to the target jaw position W1 is greater than the maxillary and mandibular interspace corresponding to the starting jaw position W.

[0441] The opening angle of the upper and lower jaws can refer to the rotation angle of the lower jaw relative to the upper jaw relative to the closed state.

[0442] The mandibular-maxillary gap can refer to the downward movement of the mandible relative to the maxilla during rotation relative to the maxilla when the mandible is in a closed state.

[0443] The target jaw position W1 can be seen as a jaw position obtained by further opening the initial jaw position W. Therefore, the target jaw position W1 has a larger opening angle and intermaxillary space compared to the initial jaw position W.

[0444] Optionally, the occlusal force corresponding to the target jaw position W1 is positively correlated with the degree of opening of the upper and lower jaws, which includes the opening angle of the upper and lower jaws or the gap between the upper and lower jaws.

[0445] When the upper and lower jaws open, the jaw muscles release to form a force state. This force state allows the first guide plate 41 and the second guide plate 42 to abut against each other and generate occlusal force (i.e., the occlusal force corresponding to the target jaw position W1). When the opening angle of the upper and lower jaws or the gap between the upper and lower jaws is large, the greater the degree of release of the jaw muscles, the greater the occlusal force generated by the first guide plate 41 and the second guide plate 42 abutting against each other.

[0446] Below are some specific examples of determining design parameters.

[0447] In the first specific example, referring to Figure 49, assuming the design quantity corresponds to the anterior tooth region of the digital model 300 of the upper and lower jaws, the upper anterior tooth T1 needs a first force F10 and a first torque M10 to complete the design quantity, and the lower anterior tooth T2 needs a second force F20 and a second torque M20 to complete the design quantity, which must satisfy the following equations: F×cosθ1=F10 (1) F×cosθ2=F20 (2) F×d1=M10 (3) F×d2=M20 (4) F=kx (5)

[0448] Where F is the force F, θ1 is the angle between the line of action L and the extension of the first major axis L1, θ2 is the angle between the line of action L and the extension of the second major axis L2, d1 is the vertical distance from the first impedance center R1 to the line of action L, d1 can be regarded as the lever arm corresponding to the first torque M10, d2 is the vertical distance from the second impedance center R2 to the line of action L, d2 can be regarded as the lever arm corresponding to the second torque M20, x is the penetration amount, which can be defined as the elevation of the target jaw position W1 relative to the initial jaw position W, and k is a constant, which can be obtained from experiments.

[0449] When θ1 is determined, θ2 is determined simultaneously; when d1 is determined, d2 is determined simultaneously. Therefore, θ1, θ2, d1, and d2 actually only have two unknowns. Adding F and x, there are a total of four unknowns in the five equations. Based on the five equations, θ1, θ2, d1, d2, F, and x can be determined, thereby determining the position of the contact point O, the direction of the line of action L, and the magnitude of the force F. This allows for the determination of a suitable guide plate structure 400 and the provision of a suitable biting force.

[0450] When it is difficult to satisfy all five equations at the same time, relatively unimportant equations can be removed. For example, when the design quantity mainly realizes the labial inclination and intrusion of the maxillary anterior tooth T1 and the intrusion of the mandibular anterior tooth T2, the second torque M20 of the mandibular anterior tooth T2 is not an important parameter, so equation (4) can be removed, and then more accurate θ1, θ2, d1, F, x can be obtained.

[0451] Alternatively, when it is difficult to satisfy all five equations at the same time, some parameters can be adjusted to have a floating range. For example, the first force F10 can be adjusted to be within the range of 80%*F10-120%*F10, and θ1, θ2, d1, d2, F, and x can be obtained through computer iteration.

[0452] In the second specific example, assuming the design quantity corresponds to the anterior tooth region of the digital model 300 of the upper and lower jaws, the main difference between the second specific example and the first specific example is that the second specific example first obtains the first movement amount x1 and the first rotation amount β1 of the maxillary anterior tooth T1 in the sagittal direction, and the second movement amount x2 and the second rotation amount β2 of the mandibular anterior tooth T2 in the sagittal direction, and then obtains the first force F10, the first torque M10, the second force F20 and the second torque M20 based on the first movement amount x1, the first rotation amount β1, the second movement amount x2 and the second rotation amount β2.

[0453] In the second specific example, the relationship between the force and torque generated by the corresponding material orthodontic appliance under the movement and rotation of the teeth to be treated (i.e., the first movement x1, the first rotation β1, the second movement x2, and the second rotation β2) is first obtained through finite element simulation or physical experiments, satisfying the following formula:

[0454] A1, B1, C1, D1, A2, B2, C2, and D2 are obtained through finite element simulation or physical experiments. According to the above formula, the first force F10, the first torque M10, the second force F20, and the second torque M20 can be obtained. Furthermore, according to the first specific example, θ1, θ2, d1, d2, F, and x can be obtained.

[0455] Optionally, referring to Figure 50, the design method also includes:

[0456] Step G1: Obtain the first design quantity for the Nth correction step and the second design quantity for the (N+M)th correction step, where N and M are both positive integers.

[0457] Optionally, the first design amount and / or the second design amount may include different translation and / or rotation amounts.

[0458] Step G2: Determine the first design parameters and the second design parameters of the guide plate structure 400 based on the first design quantity and the second design quantity, respectively. The first design parameters and the second design parameters are different.

[0459] The guide plate structure 400 can be designed differently for different orthodontic steps, allowing for personalized design for each orthodontic step and greatly improving the orthodontic effect.

[0460] Optionally, the entire orthodontic process can be divided into multiple orthodontic stages, with the Nth orthodontic step and the N+Mth orthodontic step corresponding to different or the same orthodontic stages.

[0461] Each orthodontic stage includes at least one of the following: maxillary labial-buccal inclination correction, mandibular labial-buccal inclination correction, maxillary-lingual inclination correction, mandibular-lingual inclination correction, maxillary depressurization correction, mandibular depressurization correction, maxillary anterior retraction correction, and mandibular anterior retraction correction. Each orthodontic stage corresponds to the anterior and / or posterior regions.

[0462] Optionally, the guide plate structure 400 in the specific application scenario of deep bonding is introduced.

[0463] Referring to Figure 51, the first guide plate 41 is located on the lingual side or incisal edge Q1 of the maxillary digital model 100a anterior tooth (maxillary anterior tooth T1), and the second guide plate 42 is located on the labial side or incisal edge Q2 of the mandibular digital model 200a anterior tooth (mandibular anterior tooth T2). The force and / or torque include at least the maxillary labial tilt force of the corresponding maxillary digital model 100a anterior tooth or the maxillary labial tilt torque M1 of the corresponding maxillary digital model 100a anterior tooth.

[0464] In cases of deep overbite, the maxillary anterior tooth T1 covers at least part of the mandibular anterior tooth T2. It is necessary to indent the maxillary anterior tooth T1 and the mandibular anterior tooth T2 to improve the deep overbite. However, the maxillary anterior tooth T1 and the mandibular anterior tooth T2 are usually relatively vertical in their initial state. The initial relative positions of the maxillary anterior tooth T1, the mandibular anterior tooth T2 and the alveolar bone are not suitable for direct absolute indentation of the maxillary anterior tooth T1 and the mandibular anterior tooth T2. Therefore, it is necessary to first adjust the relative positions of the maxillary anterior tooth T1 and the alveolar bone as well as the relative positions of the mandibular anterior tooth T2 and the alveolar bone.

[0465] During orthodontic treatment, at least the maxillary anterior tooth T1 should be labially tilted. Firstly, the relative position of the maxillary anterior tooth T1 and the alveolar bone can be gradually adjusted to make the maxillary anterior tooth T1 suitable for intrusion. Secondly, the gap between the maxillary anterior tooth T1 and the mandibular anterior tooth T2 can be increased to facilitate the installation design of the first guide plate 41 and the second guide plate 42. Thirdly, the maxillary anterior tooth T1 has a certain degree of inclination, which facilitates its interaction with the mandibular anterior tooth T2, making it easier to achieve intrusion and retraction of the maxillary and mandibular anterior teeth.

[0466] During the treatment of deep overbite, if the mandibular anterior tooth T2 is lingually tilted, it will worsen the deep overbite. If the maxillary anterior tooth T11 is lingually tilted, it will cause the maxillary anterior tooth T1 and the mandibular anterior tooth T2 to interfere with each other. The first guide plate 41 is set on the lingual side of the maxillary anterior tooth T1, and the second guide plate 42 is set on the labial side of the mandibular anterior tooth T2. By properly designing the first guide plate 41 and the second guide plate 42, the maxillary anterior tooth T1 can be labially tilted and the mandibular anterior tooth T2 can be kept from lingually tilting, which can effectively prevent the deep overbite from worsening.

[0467] Optionally, the force and / or torque may also include the mandibular inclination force of the anterior teeth corresponding to the digital mandibular model 200a or the mandibular inclination torque M2 of the anterior teeth corresponding to the digital mandibular model 200a.

[0468] During the orthodontic treatment, the mandibular anterior tooth T2 is labially tilted. Firstly, this allows for gradual adjustment of the relative position of the mandibular anterior tooth T2 and the alveolar bone, making it suitable for intrusion. Secondly, it avoids the aggravation of deep overbite caused by lingual tilt of the mandibular anterior tooth T2. Thirdly, the mandibular anterior tooth T2 has a certain degree of tilt, which facilitates its interaction with the maxillary anterior tooth T1, making it easier to achieve intrusion and retraction of the maxillary and maxillary anterior teeth.

[0469] Optionally, the labial inclination of the maxillary anterior teeth T1 and the labial inclination of the mandibular anterior teeth T2 can be generated in the same orthodontic step or in different orthodontic steps, depending on the different orthodontic needs of each orthodontic step.

[0470] Optionally, the force and / or torque may also include indentation force on the corresponding upper and lower anterior teeth, which may cause the upper and lower anterior teeth to indent or retract.

[0471] During orthodontic treatment, not only can the maxillary anterior teeth T1 be labially tilted (or the mandibular anterior teeth T2 labially tilted), but the maxillary and mandibular anterior teeth can also be intruded or retracted. For example, when the teeth are labially tilted, they will be intruded or retracted. The relative position between the labially tilted teeth and the alveolar bone is more suitable for the intrusion or retraction of the teeth, thereby accelerating the resolution of deep overbite problems.

[0472] Optionally, referring to Figure 52, in the case of deep overbite correction, the entire correction process usually needs to be divided into multiple correction steps. The absolute value of the lever arm corresponding to the maxillary labial tilt torque M1 in the Nth correction step is not less than the absolute value of the lever arm corresponding to the maxillary labial tilt torque M1' in the N+Mth correction step, where N and M are both positive integers.

[0473] This corresponds to the degree of labial inclination of the maxillary anterior tooth T1 in the Nth orthodontic step being no less than the degree of labial inclination of the maxillary anterior tooth T1 in the N+M orthodontic step.

[0474] The absolute value of the lever arm corresponding to the mandibular tilting moment M2 in the Nth correction step is not greater than the absolute value of the lever arm corresponding to the mandibular tilting moment M2' in the N+Mth correction step, where N and M are both positive integers.

[0475] This corresponds to the fact that the degree of labial inclination produced by the mandibular anterior tooth T2 in the Nth orthodontic step is no greater than the degree of labial inclination produced by the mandibular anterior tooth T2 in the N+M orthodontic step.

[0476] When deep overbite treatment is in the relatively early Nth orthodontic step, since the maxillary anterior teeth T1 and mandibular anterior teeth T2 are usually relatively vertical, a relatively large labial inclination moment can be provided to the maxillary anterior teeth T1 to adjust the relative position of the maxillary anterior teeth T1 and alveolar bone to a larger extent first. The relative position of the mandibular anterior teeth T2 and alveolar bone can be left unadjusted at first, or a relatively small labial inclination moment can be provided to adjust the relative position of the mandibular anterior teeth T2 and alveolar bone to a smaller extent.

[0477] Optionally, while the maxillary anterior T1 is labially incised, there may also be a certain degree of intrusion of the maxillary anterior T1.

[0478] Then, when the deep overbite treatment is in the relatively late N+M treatment step, the labial inclination of the maxillary anterior tooth T1 has progressed to a certain extent. At this time, the labial inclination moment of the maxillary anterior tooth T1 can be reduced to avoid excessive labial inclination of the maxillary anterior tooth T1. At the same time, the labial inclination moment of the mandibular anterior tooth T2 can be increased, thereby adjusting the relative position of the mandibular anterior tooth T2 and the alveolar bone to a greater extent.

[0479] Optionally, while the mandibular anterior T2 is labially incised, there may also be a certain degree of intrusion of the mandibular anterior T2.

[0480] Then, when the labial inclination of the maxillary anterior tooth T1 and the mandibular anterior tooth T2 has reached a certain level, the deep overbite has also been improved to a certain extent, and there is a certain space between the maxillary anterior tooth T1 and the mandibular anterior tooth T2 to achieve absolute intrusion.

[0481] Absolute compression mainly refers to the force generated by the mutual contact between the first guide plate 41 and the second guide plate 42, which mainly achieves compression. For example, the first guide plate 41 can be set close to or directly at the incisal end of the maxillary anterior tooth T1, and the second guide plate 42 can be set close to or directly at the incisal end of the mandibular anterior tooth T2, so that a larger proportion of the force can be used to compress the maxillary anterior tooth T1 and the mandibular anterior tooth T2.

[0482] Referring to Figure 53, this embodiment of the invention also provides a method for molding a dental orthodontic system 500, comprising:

[0483] According to the design method of the orthodontic system 500 described above, a digital model 300 of the upper and lower jaws with a guide plate structure 400 added is obtained.

[0484] A dental orthodontic system 500 is generated based on the digital model 300 of the upper and lower jaws with the guide plate structure 400 added. The dental orthodontic system 500 includes a first appliance 10a corresponding to the upper teeth and a second appliance 20a corresponding to the lower teeth (see Figure 42).

[0485] Optionally, a physical model can be formed first based on the digital model 100a of the maxilla with the first guide plate 41 and the digital model 200a of the mandible with the second guide plate 42, and then a first orthodontic appliance 10a with the first part 11 and a second orthodontic appliance 20a with the second part 12 can be generated by hot pressing film process.

[0486] Alternatively, a first orthodontic appliance 10a with a first part 11 and a second orthodontic appliance 20a with a second part 12 can be generated by 3D printing based on the data of the digital model 100a of the maxilla with a first guide plate 41 and the digital model 200a of the mandible with a second guide plate 42.

[0487] The present invention also provides a dental orthodontic system 500, which is obtained according to the molding method of the dental orthodontic system 500 described above. The dental orthodontic system 500 includes a first orthodontic appliance 10a with a first portion 11 and a second orthodontic appliance 20a with a second portion 12 (refer to FIG42).

[0488] Referring to Figure 54, this embodiment of the invention also provides an apparatus 600 for designing a dental orthodontic system 500, comprising:

[0489] The first module 60 is used to obtain the design quantities of the target area of ​​the digital model 300 of the upper and lower jaws. The design quantities include the translation and / or rotation of the target area.

[0490] The second module 61 is used to determine the design parameters of the guide plate structure 400 according to the design quantity. The guide plate structure 400 includes a first guide plate 41 and a second guide plate 42.

[0491] The third module 62 is used to add a first guide plate 41 to the maxillary digital model 100a and a second guide plate 42 to the mandibular digital model 200a based on the design parameters.

[0492] The device 600 can also be configured based on the design method of the dental orthodontic system 500 in any of the aforementioned technical solutions. Specifically, based on the relationship between the steps, related steps can be implemented in the same or different modules.

[0493] The aforementioned device or its modules and units can be implemented by computer chips or physical entities, or by products with corresponding functions. While the device is described in terms of multiple modules, in other embodiments, the functions of the modules can be implemented in one or more software or hardware components.

[0494] This invention provides a storage medium, which may specifically be a computer-readable storage medium. The storage medium can be installed in a computer and store an application program. In this case, the storage medium can be any available medium that the computer can access data, or it can be a storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium such as a floppy disk, hard disk, or magnetic tape; an optical medium such as a DVD (Digital Video Disc); or a semiconductor medium such as an SSD (Solid State Disk).

[0495] When the application is executed, it implements the steps of any technical solution of the design method of the aforementioned dental orthodontic system 500.

[0496] The present invention provides an electronic device, which may be a computer, mobile phone, tablet computer, etc. The present invention does not limit the specific type of electronic device.

[0497] The electronic device includes at least one processor, at least one memory, and a communication bus. The at least one processor and at least one memory communicate with each other via the communication bus.

[0498] The communication bus can include any number of buses and bridge circuits. In some implementations, in addition to connecting the processor and memory, the communication bus can also be used to connect peripheral devices or other peripheral circuits.

[0499] The memory is used to store application programs.

[0500] The processor is used to implement any of the technical solutions of the aforementioned design method for the dental orthodontic system 500 when executing an application program stored in memory.

[0501] In summary, the fourth embodiment determines the design parameters of the guide plate structure 400 based on the design quantity of the target area of ​​the digital model 300 of the upper and lower jaws. Compared with the standard guide plate structure in the prior art, the guide plate structure 400 added in this embodiment can more effectively complete the design quantity, and the design of the guide plate structure 400 is more personalized.

[0502] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0503] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A dental system, characterized in that, The treatment includes two appliances corresponding to the Nth and N+Mth orthodontic steps, where N and M are both positive integers. Each appliance includes a jaw plate structure connecting the upper and lower jaws. The jaw plate structure includes a first part corresponding to the upper teeth and a second part corresponding to the lower teeth. When the jaw plate structure connects the upper and lower jaws, the first part and the second part abut against each other to form an abutment surface. The two jaw plate structures corresponding to the two appliances have different parameters. The different parameters are configured such that when the jaw plate structure connects the upper and lower jaws, the different parameters generate different forces and / or different torques.

2. A dental system, characterized in that, The treatment includes two appliances corresponding to the Nth and N+Mth orthodontic steps, where N and M are both positive integers. Each appliance includes a jaw plate structure connecting the upper and lower jaws. The jaw plate structure includes a first part corresponding to the upper teeth and a second part corresponding to the lower teeth. When the jaw plate structure connects the upper and lower jaws, the first part and the second part abut against each other to form an abutment surface. The two jaw plate structures of the two appliances have different parameters, including at least one of the following: the setting position of the jaw plate structure, the shape of the abutment surface, the position of the contact point formed by the abutment surface, and the direction of the line of action passing through the contact point. The setting position of the jaw plate structure is defined as the installation position of the jaw plate structure within the installation gap, and the installation gap is the gap formed between the upper and lower jaws for installing the jaw plate structure. The shape of the abutment surface includes at least one of the following: the geometry of the abutment surface and the extension direction of the abutment surface. The position of the contact point is defined as the spatial position of the geometric center or force center of the abutment surface within the installation gap.

3. The dental system according to any one of claims 1-2, characterized in that, The contact surface is a plane.

4. The dental system according to any one of claims 1-2, characterized in that, When the first part and the second part abut against each other, the upper and lower jaws form a target jaw position, and the parameters include the biting force on the jaw plate structure when the target jaw position is achieved.

5. The dental system according to claim 4, characterized in that, The biting force is positively correlated with the degree of opening of the upper and lower jaws corresponding to the target jaw position, and the degree of opening includes the opening angle or gap between the upper and lower jaws.

6. The dental system according to claim 4, characterized in that, The target jaw position deviates from the initial jaw position, and the occlusal force corresponding to the target jaw position is greater than the initial occlusal force corresponding to the initial jaw position.

7. The dental system according to claim 6, characterized in that, The initial jaw position is the resting jaw position, and the initial occlusal force is zero or less than a preset value.

8. The dental system according to claim 6, characterized in that, The opening angle of the upper and lower jaws corresponding to the target jaw position is greater than the opening angle of the upper and lower jaws corresponding to the starting jaw position, and the gap between the upper and lower jaws corresponding to the target jaw position is greater than the gap between the upper and lower jaws corresponding to the starting jaw position.

9. The dental system according to any one of claims 1-2, characterized in that, Different parameters produce different forces and / or different torques. The forces are depressing force, anterior tooth retraction force, labial / buccal tilting force, or lingual tilting force, and the torques are labial / buccal tilting torque or lingual tilting torque.

10. The dental system according to any one of claims 1-2, characterized in that, The Nth and N+Mth orthodontic steps correspond to different orthodontic stages or the same orthodontic stage. Each orthodontic stage includes at least one of the following: maxillary labial-buccal inclination correction, mandibular labial-buccal inclination correction, maxillary-lingual inclination correction, mandibular-lingual inclination correction, maxillary depressurization correction, mandibular depressurization correction, maxillary anterior retraction correction, and mandibular anterior retraction correction.

11. The dental system according to any one of claims 1-2, characterized in that, The first part of both the Nth and N+Mth orthodontic steps corresponds to the lingual or incisal edge of the maxillary anterior teeth, and the second part corresponds to the labial or incisal edge of the mandibular anterior teeth. The first and second parts of the Nth orthodontic step abut against each other to generate a first torque, and the first and second parts of the N+Mth orthodontic step abut against each other to generate a second torque. The first torque includes only the maxillary labial tilt torque or the first torque includes both the maxillary labial tilt torque and the mandibular labial tilt torque. The second torque includes both the maxillary labial tilt torque and the mandibular labial tilt torque.

12. The dental system according to claim 11, characterized in that, The absolute value of the lever arm corresponding to the maxillary inclination torque in the first torque is not less than the absolute value of the lever arm corresponding to the maxillary inclination torque in the second torque.

13. The dental system according to claim 11, characterized in that, The absolute value of the lever arm corresponding to the mandibular tilting torque in the first torque is not greater than the absolute value of the lever arm corresponding to the mandibular tilting torque in the second torque.

14. The dental system according to any one of claims 1-2, characterized in that, The first part corresponds to the lingual or incisal edge of the maxillary anterior teeth, and the second part corresponds to the labial or incisal edge of the mandibular anterior teeth. The line of action forms a first projection line at the first reference surface. The first projection point of the first impedance center defined by the maxillary anterior teeth at the first reference surface is located on the first side of the first projection line. The second projection point of the second impedance center defined by the mandibular anterior teeth at the first reference surface is located on the first side of the first projection line or on the first projection line. There is a vertical distance between the first projection point and the first projection line. The appliance of the Nth orthodontic step and the appliance of the N+Mth orthodontic step have a first vertical distance and a second vertical distance, respectively. The first vertical distance is not less than the second vertical distance. The line of action passes through the geometric center or force center of the contact surface. The first side includes the incisal edge of the mandibular anterior teeth. The first reference surface is parallel to the sagittal plane, or the first reference surface passes through the line of action and extends along the labial and lingual direction.

15. The dental system according to any one of claims 1-2, characterized in that, The first part corresponds to the lingual or incisal edge of the maxillary anterior teeth, and the second part corresponds to the labial or incisal edge of the mandibular anterior teeth. The line of action forms a first projection line at the first reference surface. The first projection point of the first impedance center defined by the maxillary anterior teeth at the first reference surface is located on the first side of the first projection line. The second projection point of the second impedance center defined by the mandibular anterior teeth at the first reference surface is located on the first side of the first projection line or on the first projection line. There is a vertical distance between the second projection point and the first projection line. The appliance of the Nth orthodontic step and the appliance of the N+Mth orthodontic step have a third vertical distance and a fourth vertical distance, respectively. The third vertical distance is not greater than the fourth vertical distance. The line of action passes through the geometric center or force center of the contact surface. The first side includes the incisal edge of the mandibular anterior teeth. The first reference surface is parallel to the sagittal plane, or the first reference surface passes through the line of action and extends along the labial and lingual direction.

16. The dental system according to any one of claims 1-2, characterized in that, The first part corresponds to the lingual side of the maxillary anterior teeth, and the second part corresponds to the labial side of the mandibular anterior teeth. The impedance center connecting segment forms a second projection segment at the second reference surface. The third projection point of the geometric center or force center of the abutment surface at the second reference surface is located on the second side of the second projection segment. There is a vertical distance between the third projection point and the second projection segment. The dental system of the Nth orthodontic step and the dental system of the N+Mth orthodontic step have a first vertical distance and a second vertical distance, respectively. The second vertical distance is not less than the first vertical distance. The two endpoints of the impedance center connecting segment are the first impedance center defined by the maxillary anterior teeth and the second impedance center defined by the mandibular anterior teeth, respectively. The second reference surface is parallel to the sagittal plane. Alternatively, the second reference surface is determined by the geometric center or force center of the abutment surface, the first impedance center, and the second impedance center. Alternatively, the second reference surface passes through at least one of the geometric center or force center of the abutment surface, the first impedance center, and the second impedance center and extends in the labial-lingual direction. The second side includes the incisal edge of the maxillary anterior teeth.

17. The dental system according to any one of claims 1-2, characterized in that, One of the first part and the second part is a protrusion extending out of the tooth, and the other is a protrusion extending out of the tooth or a part that conforms to the tooth.

18. The dental system according to claim 17, characterized in that, The protrusion is directly connected to the tooth, or the orthodontic appliance also includes an appliance body having a cavity for accommodating the tooth, and the protrusion is connected to the appliance body.

19. The dental system according to claim 17, characterized in that, The portion that conforms to the teeth is the tooth area, or the orthodontic appliance may also include an appliance body having a cavity for accommodating the teeth, the portion that conforms to the teeth being the area where the appliance body is in close contact with the teeth.

20. An orthodontic appliance, characterized in that, The first protrusion structure is provided on the labial or buccal side or lingual side corresponding to the first jaw. The first protrusion structure is configured such that when the first protrusion structure abuts against the opposing second jaw, a target jaw position is formed. The target jaw position deviates from the initial jaw position, and the occlusal force corresponding to the target jaw position is greater than the initial occlusal force corresponding to the initial jaw position.

21. The orthodontic appliance according to claim 20, characterized in that, The initial jaw position is the resting jaw position, and the initial occlusal force is zero or less than the initial value.

22. The orthodontic appliance according to claim 20, characterized in that, When the first and second jaws are in the target jaw position, a first opening angle is formed between the first and second jaws. When the first and second jaws are in the initial jaw position, an initial opening angle is formed between the first and second jaws. The first opening angle is greater than the initial opening angle.

23. The orthodontic appliance according to claim 20, characterized in that, When the first and second jaws are in the target jaw position, a first gap is formed between the first and second jaws. When the first and second jaws are in the initial jaw position, an initial gap is formed between the first and second jaws. The first gap is larger than the initial gap.

24. The orthodontic appliance according to claim 20, characterized in that, The degree of opening of the target jaw position is positively correlated with the occlusal force, and the degree of opening includes the opening angle or gap between the first jaw and the second jaw.

25. The orthodontic appliance according to claim 20, characterized in that, The orthodontic appliance includes a plurality of first protrusions corresponding to multiple teeth, at least some of the first protrusions being spaced apart from each other, or at least some of the first protrusions being connected as one unit.

26. The orthodontic appliance according to claim 20, characterized in that, The first protruding structure directly abuts against the incisal edge of the anterior tooth or the occlusal surface of the posterior tooth of the second jaw. Alternatively, the orthodontic appliance may also include a second appliance body having a second cavity for accommodating the second jaw, wherein the area of ​​the first protruding structure and the second appliance body that is in close contact with the incisal edge of the anterior tooth or the occlusal surface of the posterior tooth abuts against each other.

27. The orthodontic appliance according to claim 20, characterized in that, The orthodontic appliance further includes a second protrusion structure provided on the labial / buccal side, lingual side, incisal edge of the anterior teeth, or occlusal surface of the posterior teeth corresponding to the second dentition. The first protrusion structure and the second protrusion structure abut against each other to form the target jaw position.

28. The orthodontic appliance according to claim 27, characterized in that, The orthodontic appliance further includes a first appliance body having a first cavity for accommodating a first jaw, the first protrusion being located on the first appliance body; and / or the orthodontic appliance further includes a second appliance body having a second cavity for accommodating a second jaw, the second protrusion being located on the second appliance body.

29. The orthodontic appliance according to claim 27 or 28, characterized in that, The first protruding structure is provided on the labial / buccal side of the first jaw and the second protruding structure is provided on the lingual side of the second jaw, or the first protruding structure is provided on the lingual side of the first jaw and the second protruding structure is provided on the labial / buccal side of the second jaw.

30. The orthodontic appliance according to claim 27 or 28, characterized in that, The first protruding structure is provided on the lingual side of the maxillary anterior teeth and the second protruding structure is provided on the labial side of the mandibular anterior teeth. When the first protruding structure and the second protruding structure abut against each other, a torque is generated. The torque includes only the maxillary labial tilt torque or the torque includes both the maxillary labial tilt torque and the mandibular labial tilt torque.

31. The orthodontic appliance according to claim 30, characterized in that, The absolute value of the lever arm corresponding to the maxillary labial tilt moment in the Nth orthodontic step is not less than the absolute value of the lever arm corresponding to the maxillary labial tilt moment in the N+Mth orthodontic step, where N and M are both positive integers.

32. The orthodontic appliance according to claim 30, characterized in that, The absolute value of the lever arm corresponding to the mandibular tilt torque in the Nth correction step is not greater than the absolute value of the lever arm corresponding to the mandibular tilt torque in the N+Mth correction step, where N and M are both positive integers.

33. The orthodontic appliance according to any one of claims 20-22, characterized in that, The first protruding structure abuts against the opposing second tooth to form an abutment surface. At least some of the orthodontic appliances in different treatment steps have different abutment surfaces, and different abutment surfaces correspond to different translation and / or rotation amounts.

34. The orthodontic appliance according to claim 33, characterized in that, Different abutment surfaces have different parameters, including at least one of the following: the setting position of the abutment surface, the shape of the abutment surface, the position of the contact point formed by the abutment surface, and the direction of the line of action passing through the contact point. The setting position of the abutment surface is defined as the spatial position of the abutment surface within the installation gap, and the installation gap is the gap formed between the first jaw and the second jaw for installing the first protrusion structure. The shape of the abutment surface includes at least one of the following: the geometry of the abutment surface and the extension direction of the abutment surface. The position of the contact point is defined as the spatial position of the geometric center or force center of the abutment surface within the installation gap.

35. The orthodontic appliance according to claim 33, characterized in that, The contact surface is a plane.

36. An orthodontic appliance, characterized in that, It includes a first part provided on the lingual or incisal side of the corresponding maxillary anterior teeth and a second part provided on the labial or incisal side of the corresponding mandibular anterior teeth. The first part and the second part are configured such that when the maxilla and mandible occlude, the first part and the second part abut against each other to generate a force or torque, the force or torque including at least the labial inclination force of the corresponding maxillary anterior teeth or the labial inclination torque of the corresponding maxillary anterior teeth.

37. The orthodontic appliance according to claim 36, characterized in that, Force or torque also includes the indentation force corresponding to the upper and lower anterior teeth.

38. The orthodontic appliance according to claim 36, characterized in that, Force or torque also includes labial inclination force or labial inclination torque of the corresponding mandibular anterior teeth.

39. The orthodontic appliance according to claim 36, characterized in that, The first impedance center of the maxillary anterior teeth is located on the lingual side of the line of action, and the second impedance center of the mandibular anterior teeth is located on the lingual side of the line of action or on the line of action, wherein the line of action is defined by the contact surface formed by the mutual contact of the first part and the second part.

40. The orthodontic appliance according to claim 36, characterized in that, The line of action forms a first projection line at the first reference plane. The first projection point of the first impedance center defined by the maxillary anterior teeth at the first reference plane is located on the first side of the first projection line. The second projection point of the second impedance center defined by the mandibular anterior teeth at the first reference plane is located on the first side of the first projection line or on the first projection line. The line of action passes through the geometric center or force center of the contact surface formed by the mutual contact of the first part and the second part. The first side includes the incisal edge of the mandibular anterior teeth. The first reference plane is parallel to the sagittal plane, or the first reference plane passes through the line of action and extends in the labial-lingual direction.

41. The orthodontic appliance according to claim 36, characterized in that, The line of action forms a first projection line at the first reference plane, and the impedance center connecting segment forms a first projection line segment at the first reference plane. The first projection line and the first projection line segment have no intersection point or intersect only at the endpoint of the first projection line segment corresponding to the mandibular anterior tooth. The line of action passes through the geometric center or force center of the contact surface formed by the mutual contact of the first part and the second part. The two endpoints of the impedance center connecting segment are the first impedance center defined by the maxillary anterior tooth and the second impedance center defined by the mandibular anterior tooth, respectively. The first reference plane is parallel to the sagittal plane, or the first reference plane passes through the line of action and extends along the labial and lingual direction.

42. The orthodontic appliance according to claim 36, characterized in that, The geometric center or force center of the contact surface is located on the labial side of the line segment connecting the impedance centers. The contact surface is the contact surface formed by the first part and the second part abutting each other. The two endpoints of the line segment connecting the impedance centers are the first impedance center defined by the maxillary anterior teeth and the second impedance center defined by the mandibular anterior teeth, respectively.

43. The orthodontic appliance according to claim 36, characterized in that, The impedance center connecting segment forms a second projection segment at the second reference surface. The second projection point of the geometric center or force center of the contact surface at the second reference surface is located on the second side of the second projection segment. The two endpoints of the impedance center connecting segment are the first impedance center defined by the maxillary anterior teeth and the second impedance center defined by the mandibular anterior teeth, respectively. The contact surface is the contact surface formed by the first part and the second part abutting each other. The second reference surface is parallel to the sagittal plane. Alternatively, the second reference surface is determined by the geometric center or force center of the contact surface, the first impedance center, and the second impedance center. Alternatively, the second reference surface passes through at least one of the geometric center or force center of the contact surface, the first impedance center, and the second impedance center and extends in the labial-lingual direction. The second side includes the incisal edge of the mandibular anterior teeth.

44. An orthodontic appliance, characterized in that, It includes a first part provided on the lingual side or incisal edge of the corresponding maxillary anterior teeth and a second part provided on the labial side or incisal edge of the corresponding mandibular anterior teeth. The first impedance center of the maxillary anterior teeth is located on the lingual side of the line of action, and the second impedance center of the mandibular anterior teeth is located on the lingual side of the line of action or on the line of action. The line of action is defined by the contact surface formed by the mutual contact of the first part and the second part.

45. The orthodontic appliance according to claim 44, characterized in that, The line of action forms a first projection line at the first reference plane. The first projection point of the first impedance center defined by the maxillary anterior teeth at the first reference plane is located on the first side of the first projection line. The second projection point of the second impedance center defined by the mandibular anterior teeth at the first reference plane is located on the first side of the first projection line or on the first projection line. The line of action passes through the geometric center or force center of the abutment surface. The first side includes the incisal edge of the mandibular anterior teeth. The first reference plane is parallel to the sagittal plane. Alternatively, the first reference plane passes through the line of action and extends along the labial-lingual direction.

46. ​​The orthodontic appliance according to claim 45, characterized in that, There is a vertical distance between the first projection point and the first projection line. The orthodontic appliance of the Nth orthodontic step and the orthodontic appliance of the N+Mth orthodontic step have a first vertical distance and a second vertical distance, respectively. The first vertical distance is not less than the second vertical distance, and N and M are both positive integers.

47. The orthodontic appliance according to claim 45, characterized in that, The second projection point has a vertical distance from the first projection line. The orthodontic appliance of the Nth orthodontic step and the orthodontic appliance of the N+Mth orthodontic step have a third vertical distance and a fourth vertical distance, respectively. The third vertical distance is not greater than the fourth vertical distance. N and M are both positive integers.

48. An orthodontic appliance, characterized in that, It includes a first part provided on the lingual or incisal side corresponding to the maxillary anterior teeth and a second part provided on the labial or incisal side corresponding to the mandibular anterior teeth. The geometric center or force center of the abutment surface is located on the labial side of the line segment connecting the impedance centers. The abutment surface is the contact surface formed by the first part and the second part abutting against each other. The two endpoints of the line segment connecting the impedance centers are the first impedance center defined by the maxillary anterior teeth and the second impedance center defined by the mandibular anterior teeth, respectively.

49. The orthodontic appliance according to claim 48, characterized in that, The line of action forms a first projection line at the first reference plane, and the line segment connecting the impedance centers forms a first projection line segment at the first reference plane. The first projection line and the first projection line segment have no intersection point or intersect only at the endpoint of the corresponding mandibular anterior tooth of the first projection line segment. The line of action passes through the geometric center or force center of the contact surface formed by the mutual contact of the first part and the second part. The first reference plane is parallel to the sagittal plane, or the first reference plane passes through the line of action and extends along the labial and lingual direction.

50. The orthodontic appliance according to claim 48, characterized in that, The impedance center connecting segment forms a second projection segment at the second reference surface. The third projection point of the geometric center or force center of the abutment surface at the second reference surface is located on the second side of the second projection segment. The second reference surface is parallel to the sagittal plane. Alternatively, the second reference surface is determined by the geometric center or force center of the abutment surface, the first impedance center, and the second impedance center. Alternatively, the second reference surface passes through at least one of the geometric center or force center of the abutment surface, the first impedance center, and the second impedance center and extends in the labial-lingual direction. The second side includes the incisal edge of the maxillary anterior teeth.

51. The orthodontic appliance according to claim 50, characterized in that, The third projection point has a vertical distance from the second projection line segment. The orthodontic appliance of the Nth orthodontic step and the orthodontic appliance of the N+Mth orthodontic step have a first vertical distance and a second vertical distance, respectively. The second vertical distance is not less than the first vertical distance. N and M are both positive integers.

52. An orthodontic appliance, characterized in that, The device includes a first portion located on the lingual or incisal side of the maxillary anterior teeth and a second portion located on the labial or incisal side of the mandibular anterior teeth. The line of action forms a first projection line at a first reference plane, and the impedance center connecting segment forms a first projection line segment at the first reference plane. The first projection line and the first projection line segment have no intersection point or intersect only at the endpoint of the first projection line segment corresponding to the mandibular anterior teeth. The line of action passes through the geometric center or force center of the contact surface formed by the mutual contact of the first portion and the second portion. The two endpoints of the impedance center connecting segment are the first impedance center defined by the maxillary anterior teeth and the second impedance center defined by the mandibular anterior teeth, respectively. The first reference plane is parallel to the sagittal plane, or the first reference plane passes through the line of action and extends along the labial and lingual direction.

53. The orthodontic appliance according to any one of claims 39-52, characterized in that, The first part corresponds to the space between the adjacent teeth of the Nth maxillary anterior tooth or the adjacent teeth of the Nth maxillary anterior tooth, and the second part corresponds to the space between the adjacent teeth of the Mth mandibular anterior tooth or the adjacent teeth of the Mth mandibular anterior tooth.

54. The orthodontic appliance according to claim 53, characterized in that, The first impedance center is the impedance center of the N-sized maxillary anterior tooth or the two impedance centers of the N-sized maxillary anterior tooth and the N'-sized maxillary anterior tooth located on both sides of the interdental space; the second impedance center is the impedance center of the M-sized mandibular anterior tooth or the two impedance centers of the M-sized mandibular anterior tooth and the M'-sized mandibular anterior tooth located on both sides of the interdental space.

55. The orthodontic appliance according to any one of claims 39-52, characterized in that, When the contact surface is a plane, the line of action is perpendicular to the plane; when the contact surface is a curved surface, the line of action is perpendicular to the tangent of the curved surface, and the tangent passes through the force center of the curved surface.

56. The orthodontic appliance according to any one of claims 39-52, characterized in that, The line of action forms a first acute angle with the long axis of the first tooth of the maxillary anterior teeth, and the first acute angle of the appliance in the Nth orthodontic step is not less than the first acute angle of the appliance in the N+Mth orthodontic step.

57. The orthodontic appliance according to any one of claims 39-52, characterized in that, The line of action forms a second acute angle with the long axis of the second tooth of the mandibular anterior teeth, and the second acute angle of the appliance in the Nth orthodontic step is not less than the second acute angle of the appliance in the N+Mth orthodontic step.

58. The orthodontic appliance according to any one of claims 36-52, characterized in that, The first part of the Nth orthodontic step abuts against the second part to generate a first torque, and the first part of the N+Mth orthodontic step abuts against the second part to generate a second torque. The first torque includes only the maxillary labial tilt torque or the first torque includes both the maxillary labial tilt torque and the mandibular labial tilt torque. The second torque includes both the maxillary labial tilt torque and the mandibular labial tilt torque. N and M are both positive integers.

59. The orthodontic appliance according to claim 58, characterized in that, The absolute value of the lever arm corresponding to the maxillary inclination torque in the first torque is not less than the absolute value of the lever arm corresponding to the maxillary inclination torque in the second torque.

60. The orthodontic appliance according to claim 58, characterized in that, The absolute value of the lever arm corresponding to the mandibular tilting torque in the first torque is not greater than the absolute value of the lever arm corresponding to the mandibular tilting torque in the second torque.

61. The orthodontic appliance according to any one of claims 36-52, characterized in that, The orthodontic appliance for at least some different orthodontic steps has a first part and a second part with different parameters. The first part and the second part for different orthodontic steps are set in the same tooth area. The parameters include at least one of the following: the setting position of the abutment surface formed by the first part and the second part abutting each other, the shape of the abutment surface, the position of the geometric center or force center of the abutment surface, and the direction of the line of action passing through the geometric center or force center. The setting position of the abutment surface is defined as the spatial position of the abutment surface within the receiving gap, and the receiving gap is the gap formed between the upper and lower jaws to receive the first part and the second part. The shape of the abutment surface includes at least one of the following: the geometric shape of the abutment surface and the extension direction of the abutment surface. The position of the geometric center or force center of the abutment surface is defined as the spatial position of the geometric center or force center of the abutment surface within the receiving gap.

62. The orthodontic appliance according to claim 61, characterized in that, The contact surface is a plane.

63. The orthodontic appliance according to any one of claims 36-62, characterized in that, One of the first part and the second part is a protrusion extending out of the tooth, and the other is a protrusion extending out of the tooth or a part that conforms to the tooth.

64. The orthodontic appliance according to claim 63, characterized in that, The protrusion is directly connected to the tooth, or the orthodontic appliance also includes an appliance body having a cavity for accommodating the tooth, and the protrusion is connected to the appliance body.

65. The orthodontic appliance according to claim 63, characterized in that, The portion that conforms to the teeth is the tooth area, or the orthodontic appliance may also include an appliance body having a cavity for accommodating the teeth, the portion that conforms to the teeth being the area where the appliance body is in close contact with the teeth.

66. The orthodontic appliance according to any one of claims 36-62, characterized in that, When the first part and the second part abut against each other, the upper and lower jaws are in the target jaw position, which is deviated from the initial jaw position, and the biting force corresponding to the target jaw position is greater than the initial biting force corresponding to the initial jaw position.

67. The orthodontic appliance according to claim 66, characterized in that, The initial jaw position is the resting jaw position, and the initial occlusal force is zero or less than a preset value.

68. The orthodontic appliance according to claim 66, characterized in that, The maxillary and mandibular opening angle corresponding to the target jaw position is greater than the maxillary and mandibular opening angle corresponding to the starting jaw position, and the maxillary and mandibular gap corresponding to the target jaw position is greater than the maxillary and mandibular gap corresponding to the starting jaw position.

69. The orthodontic appliance according to claim 66, characterized in that, The occlusal force corresponding to the target jaw position is positively correlated with the degree of opening of the upper and lower jaws, which includes the opening angle of the upper and lower jaws or the gap between the upper and lower jaws.

70. A design method for a dental orthodontic system, characterized in that... include: The design quantities of the target region in the digital model of the upper and lower jaws are obtained, and the design quantities include the translation and / or rotation of the target region. The design parameters of the guide plate structure are determined based on the design quantity, and the guide plate structure includes a first guide plate and a second guide plate. Based on the design parameters, a first guide plate is added to the target area of ​​the maxillary digital model, and a second guide plate is added to the target area of ​​the mandibular digital model.

71. The design method according to claim 70, characterized in that, The design parameters include at least one of the following: the setting position of the guide plate structure, the shape of the abutment surface, the position of the contact point formed by the abutment surface, and the direction of the line of action passing through the contact point. The setting position of the guide plate structure is defined as the installation position of the guide plate structure within the installation gap, where the installation gap is the gap formed between the digital models of the upper and lower jaws for installing the guide plate structure. The abutment surface is defined as the boundary area formed when the first guide plate and the second guide plate abut against each other. The shape of the abutment surface includes at least one of the following: the geometry of the abutment surface and the extension direction of the abutment surface. The position of the contact point is defined as the spatial position of the geometric center or force center of the abutment surface within the installation gap.

72. The design method according to claim 71, characterized in that, The contact surface is a plane.

73. The design method according to claim 71, characterized in that, The design method includes: Determine the force and / or moment in the target area based on the design parameters; The design parameters of the guide plate structure are determined based on the force and / or torque.

74. The design method according to claim 73, characterized in that, The force and / or torque includes at least one of the following: a first force and / or a first torque corresponding to the target area of ​​the maxillary digital model, and a second force and / or a second torque corresponding to the target area of ​​the mandibular digital model.

75. The design method according to claim 73, characterized in that, The design method includes: The location of the contact point and the direction of its line of action are determined based on the force and / or torque. The guide plate structure is determined based on the location of the contact point and the direction of the line of action.

76. The design method according to claim 75, characterized in that, The design method includes: The location of the guide plate structure and the shape of the contact surface are determined based on the location of the contact point and the direction of the line of action.

77. The design method according to claim 73, characterized in that, The design method includes: The magnitude of the force along the line of action is determined based on the force and / or torque. Determine the biting force of the target area in the digital model of the upper and lower jaws based on the magnitude of the applied force; The target jaw position is determined based on the biting force. The target jaw position is the jaw position formed when the first guide plate and the second guide plate abut against each other.

78. The design method according to claim 77, characterized in that, The target jaw position deviates from the initial jaw position, and the target occlusal force corresponding to the target jaw position is greater than the initial occlusal force corresponding to the initial jaw position.

79. The design method according to claim 78, characterized in that, The initial jaw position is the resting jaw position, and the initial occlusal force is zero or less than a preset value.

80. The design method according to claim 78, characterized in that, The maxillary and mandibular opening angle corresponding to the target jaw position is greater than the maxillary and mandibular opening angle corresponding to the starting jaw position, and the maxillary and mandibular gap corresponding to the target jaw position is greater than the maxillary and mandibular gap corresponding to the starting jaw position.

81. The design method according to claim 73, characterized in that, The first guide plate is located on the lingual side or incisal end of the anterior teeth of the maxillary digital model, and the second guide plate is located on the labial side or incisal end of the anterior teeth of the mandibular digital model. The force and / or torque includes at least the maxillary labial tilt force or the maxillary labial tilt torque of the anterior teeth of the corresponding maxillary digital model.

82. The design method according to claim 81, characterized in that, The absolute value of the lever arm corresponding to the maxillary labial tilt moment in the Nth orthodontic step is not less than the absolute value of the lever arm corresponding to the maxillary labial tilt moment in the N+Mth orthodontic step, where N and M are both positive integers.

83. The design method according to claim 81, characterized in that, The force and / or torque also includes the mandibular inclination force of the anterior teeth in the digital mandibular model or the mandibular inclination torque of the anterior teeth in the digital mandibular model. The absolute value of the lever arm corresponding to the mandibular inclination torque in the Nth orthodontic step is not greater than the absolute value of the lever arm corresponding to the mandibular inclination torque in the N+Mth orthodontic step. N and M are both positive integers.

84. The design method according to any one of claims 70-83, characterized in that, The design method includes: Obtain the first design quantity for the Nth correction step and the second design quantity for the (N+M)th correction step, where N and M are both positive integers; The first design parameters and the second design parameters of the guide plate structure are determined based on the first design quantity and the second design quantity, respectively. The first design parameters are different from the second design parameters.

85. The design method according to claim 84, characterized in that, The Nth and N+Mth orthodontic steps correspond to different orthodontic stages or the same orthodontic stage. Each orthodontic stage includes at least one of the following: maxillary labial-buccal inclination correction, mandibular labial-buccal inclination correction, maxillary-lingual inclination correction, mandibular-lingual inclination correction, maxillary depressurization correction, mandibular depressurization correction, maxillary anterior retraction correction, and mandibular anterior retraction correction. Each orthodontic stage corresponds to the anterior and / or posterior regions.

86. The design method according to claim 70, characterized in that, One of the first guide plate and the second guide plate protrudes beyond the protrusion of the single jaw digital model, and the other protrudes beyond the protrusion of the single jaw digital model or a part of the single jaw digital model. The protrusion is added to the labial or lingual side of the single jaw digital model.

87. A method for molding a dental orthodontic system, characterized in that... include: The design method of the orthodontic system according to any one of claims 70-86 obtains a digital model of the maxilla and mandible with a guide plate structure added; A dental orthodontic system is generated based on a digital model of the upper and lower jaws with an added guide plate structure. The dental orthodontic system includes a first appliance corresponding to the upper teeth and a second appliance corresponding to the lower teeth.

88. A dental orthodontic system, characterized in that... Includes a first orthodontic appliance and a second orthodontic appliance generated by the molding method of the dental orthodontic system according to claim 87.

89. A device for designing a dental orthodontic system, characterized in that, include: The first module is used to obtain the design amount of the target region of the digital model of the upper and lower jaws, the design amount including the translation and / or rotation of the target region; The second module is used to determine the design parameters of the guide plate structure based on the design quantity, wherein the guide plate structure includes a first guide plate and a second guide plate; The third module is used to add a first guide plate to the maxillary digital model and a second guide plate to the mandibular digital model based on the design parameters.

90. An electronic device, characterized in that, It includes a processor, a memory, and a communication bus, wherein the processor and the memory communicate with each other through the communication bus; The memory is used to store application programs; The processor is configured to implement the steps of the design method of the orthodontic system according to any one of claims 70-86 when executing an application program stored in the memory.

91. A storage medium having an application program stored thereon, characterized in that, When the application is executed, it implements the steps of the design method for the orthodontic system according to any one of claims 70-86.

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