Shell tooth aligner and design and preparation method, tooth alignment kit and system

Abstract

A shell-shaped tooth appliance comprises a shell-shaped body provided with a cavity accommodating a plurality of maxillary teeth, and a sagittal adjustment part provided on the lingual side of the anterior tooth area of the shell-shaped body and capable of adjusting the maxillo-mandibular relationship and simultaneously at least partially offsetting the deformation of the shell-shaped body caused by occlusion, the sagittal adjustment part being at least partially connected to the lingual side of the anterior tooth area of the shell-shaped body; the sagittal adjustment part has a geometry for adjusting the position of the lower anterior teeth in the sagittal direction to a target occlusion position relative to the upper jaw while stabilizing the maxillo-mandibular occlusion relationship and reducing the occlusion deformation of the shell-shaped body. The present application also provides a tooth correction kit and a tooth correction system, which realize the adjustment of the sagittal position of the lower anterior teeth using a shell-shaped tooth appliance while reducing the occlusion deformation of the shell-shaped tooth appliance.

Description

Technical Field

[0001] This invention belongs to the field of medical devices and relates to a shell-shaped orthodontic appliance, an orthodontic kit, and an orthodontic system, as well as the design and manufacturing methods of the shell-shaped orthodontic appliance. Background Technology

[0002] Poor oral habits are one of the most common causes of malocclusion. According to statistics from Beijing Medical University, they account for about one-quarter of all types of malocclusion. Deep overbite of the anterior teeth is a common cause. Malocclusion is a type of malocclusion caused by one or two vertical developmental abnormalities in the maxillary and mandibular arches and / or jawbones. It is characterized by the incisal edge of the upper anterior teeth covering more than one-third of the labial length of the crown of the lower anterior teeth, or the incisal edge of the lower anterior teeth biting onto more than one-third of the lingual incisal edge of the crown of the upper anterior teeth. This makes it easy for the patient to bite their gums, leading to periodontitis of the anterior teeth and diseases of the facial joints. Deep overbite. The success of orthodontic treatment largely depends on the correction of deep overbite. The goal is to correct the excessively steep Spee curve of the mandible and the compensating curve of the maxilla, ultimately achieving a normal Spee curve and compensating curve for both the upper and lower jaws, thus harmonizing the overbite and overjet relationships. In most malocclusion patients, deep overbite is a common issue. Orthodontic treatment may be the first step in the entire orthodontic process, and opening the bite is the key to correcting a deep overbite. The key.

[0003] Current techniques typically use maxillary removable appliances to maintain the height of the alveolar bone in the anterior teeth, focusing on raising the height of the posterior teeth, and adjusting them one by one starting from the last tooth. A pad is used to allow each pair of teeth to elongate and make contact. After the posterior teeth have increased in height, the lingual misalignment of the anterior teeth and the distal misalignment of the posterior teeth can be corrected. Another method is to use a flat guide on the lingual side of the maxillary anterior teeth area. However, this method requires fixing a flat guide made of metal and resin to the maxilla. For the patient, this not only causes some teeth to be suspended after wearing, but also affects the patient's chewing and causes a strong foreign body sensation.

[0004] Therefore, it is of great significance to improve the structure of clear aligners so that they can achieve the same effect as those using maxillary removable aligners or flat guides, while also having the advantages of wearing clear aligners. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects existing in the prior art and provide a shell-shaped orthodontic appliance, a dental orthodontic kit and a dental orthodontic system, as well as a design method and a manufacturing method for the shell-shaped orthodontic appliance. This invention can solve the problem that the existing technology cannot achieve by using invisible aligners to adjust the sagittal position of the mandibular anterior teeth while reducing the occlusal deformation caused by the shell-shaped orthodontic appliance.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] A shell-shaped orthodontic appliance includes a shell-shaped body with a cavity for accommodating multiple maxillary teeth. The shell-shaped body also has a sagittal adjustment section on the lingual side of its anterior region, capable of adjusting the positional relationship between the mandible and mandible and simultaneously at least partially offsetting deformation of the shell-shaped body caused by occlusion. The sagittal adjustment section is at least partially connected to the lingual side of the shell-shaped body's anterior region. The sagittal adjustment section has a geometric structure that, while stabilizing the mandibular occlusal relationship and reducing occlusal deformation of the shell-shaped body, adjusts the position of the mandibular anterior teeth relative to the maxilla in the sagittal direction to a target occlusal position.

[0008] Furthermore, the sagittal adjustment portion includes a sidewall extending from the lingual side of the anterior tooth region of the shell-shaped body to form an accommodating space and a first reinforcing portion that at least partially counteracts the deformation of the shell-shaped body caused by occlusion; wherein the accommodating space at least accommodates the incisal edge of the mandibular anterior tooth region or a portion of the adjacent incisal edge, and one end of the first reinforcing portion is connected to the end of the sidewall away from the shell-shaped body.

[0009] Furthermore, in the sagittal section along the long axis of the tooth, the area where the first reinforcing part contacts the mandible is closer to the incisal edge of the maxillary anterior tooth region than the area where the accommodating space contacts the mandible.

[0010] Furthermore, in the sagittal section, the first included angle formed at the connection between the first reinforcing part and the side wall of the accommodating space is α, where 90°≤α≤160°.

[0011] Furthermore, the connection between the first reinforcing part and the shell-shaped body is a smoothly transitioning curved surface.

[0012] Furthermore, the first reinforcing part is smoothly connected to the proximal end face of the cavity on the left and right sides of the shell-shaped body that accommodates the first premolar.

[0013] Furthermore, the curvature of the first reinforcing part on the side of the maxillary anterior teeth region that is far from the teeth in the anterior teeth region basically matches the curvature of the anterior teeth region.

[0014] Furthermore, in the sagittal section, the width of the first reinforcing portion in the mesiodistal direction is 2-5 mm.

[0015] Furthermore, the accommodating space is a groove that is continuously or partially continuously distributed on the lingual side of the teeth in the maxillary anterior region and concave in the direction of the palate. The groove can reduce the buccal or sagittal deformation generated by the shell-like body.

[0016] Furthermore, the height difference of the accommodating space along the long axis of the tooth in the sagittal section is 1 / 4 to 1 / 2 of the length of the crown of the mandibular anterior tooth along the long axis.

[0017] Furthermore, the width of the accommodating space in the sagittal section along the mesiodistal direction is 1.5-4.0 mm.

[0018] Furthermore, the elastic modulus of the first reinforcing part is greater than the elastic modulus of the shell-shaped body.

[0019] Furthermore, the hardness of the first reinforcing part is greater than the hardness of the shell-shaped body.

[0020] Furthermore, the Shore hardness of the first reinforcing part is 65D-80D, and the Shore hardness of the shell-shaped body is 50D-75D.

[0021] Furthermore, the first reinforcing part is a multi-layer structure, the multi-layer structure including a base layer and a reinforcing layer, wherein at least one reinforcing layer at least partially covers the base layer.

[0022] Furthermore, the overall thickness of the first reinforcing portion formed by the multi-layer structure is greater than the thickness of the shell-like body.

[0023] Furthermore, the elastic modulus of the reinforcing layer is greater than that of the base layer.

[0024] Furthermore, the thickness of the first reinforcing part is 0.7-2.0 mm, and the thickness of the shell-shaped body is 0.5-1.0 mm.

[0025] Furthermore, the first reinforcing part, the accommodating space, and the shell-shaped body are integrally formed.

[0026] Furthermore, a second reinforcing part is provided at one end of the first reinforcing part extending in the distal direction, and the first reinforcing part and the second reinforcing part together form a receiving space. The first reinforcing part and the second reinforcing part are arranged at a second included angle β, and 90°≤β<180°.

[0027] Furthermore, the containment space includes reinforcing blocks.

[0028] Furthermore, the second reinforcing part is provided with a male and female structure that cooperates with the reinforcing block.

[0029] Furthermore, the second reinforcing part is provided with a protruding bubble protruding in the distal direction, and the contact area between the reinforcing block and the second reinforcing part is also provided with a protrusion that cooperates with the protruding bubble at the location corresponding to the protruding bubble.

[0030] Furthermore, the sidewalls of the accommodating space include a mesial accommodating sidewall and a distal accommodating sidewall. The mesial accommodating sidewall is at least partially connected to the lingual side of the anterior tooth region of the shell-shaped body on the side adjacent to the maxillary incisal edge. The side of the mesial accommodating sidewall away from the maxillary incisal edge is at least partially connected to one end of the distal accommodating sidewall. The other end of the distal accommodating sidewall is at least partially connected to the first reinforcing portion.

[0031] Furthermore, the distal accommodating sidewall has a guide surface that guides the mandible to slide into the accommodating space.

[0032] Furthermore, the guiding surface is a guiding plane, a guiding curved surface, or a combination of a guiding plane and a guiding curved surface.

[0033] Furthermore, when the distal receiving sidewall is a guiding plane or partially a guiding plane, in the sagittal section, the tilt angle is the third included angle γ formed between the distal receiving sidewall and the jaw plane, wherein 30°≤γ≤80°.

[0034] Furthermore, the mesial accommodating sidewall is provided with a stabilizing surface, the stabilizing surface having an inclination angle that stabilizes the mandible within the accommodating space.

[0035] Furthermore, the stabilizing surface is a stabilizing plane, a stabilizing surface, or a combination of a stabilizing plane and a stabilizing surface.

[0036] Furthermore, when the distal receiving sidewall is a guiding plane or partially a guiding plane, the tilt angle in the sagittal section is the fourth included angle δ formed between the mesial receiving sidewall and the jaw plane, where 30°≤δ≤80°.

[0037] Furthermore, the shell-like body has a geometric structure that allows the maxillary teeth to be gradually repositioned from their initial position to the target orthodontic position.

[0038] The present invention also provides a dental orthodontic system comprising a plurality of shell-shaped dental appliances, characterized in that at least one of the plurality of shell-shaped dental appliances is a shell-shaped dental appliance as described in any of the preceding claims.

[0039] The present invention also provides a dental orthodontic kit, including an upper dental appliance and a lower dental appliance, wherein the upper dental appliance is a shell-shaped dental appliance as described in any of the preceding claims, and the lower dental appliance includes a lower shell-shaped body for enclosing the lower teeth.

[0040] The present invention also provides a dental orthodontic system, comprising multiple sets of dental orthodontic kits, characterized in that the multiple sets of dental orthodontic kits include at least one set of dental orthodontic kits as described above, and the multiple sets of dental orthodontic kits have a geometry that adjusts the position of the mandibular anterior teeth relative to the maxilla in the sagittal direction to the target occlusal position while gradually repositioning the teeth from the initial position to the target position.

[0041] The present invention also provides a design method for a shell-shaped orthodontic appliance, comprising:

[0042] Obtaining a digital dental model: Obtaining a digital dental model, wherein the digital dental model includes a digital tooth model body;

[0043] Design of a shell-shaped orthodontic appliance: Based on a digital dental model, design a shell-shaped orthodontic appliance as described above. The designed shell-shaped orthodontic appliance includes a shell-shaped body designed based on the digital dental model and a sagittal adjustment part that is at least partially connected to the lingual side of the shell-shaped body. The sagittal adjustment part is designed to have a geometric structure that adjusts the position of the mandibular anterior teeth relative to the maxilla in the sagittal direction to the target occlusal position while stabilizing the occlusal relationship between the mandible and the maxilla and reducing the occlusal deformation generated by the shell-shaped body.

[0044] The present invention also provides a method for manufacturing a shell-shaped orthodontic appliance, characterized in that the designed orthodontic appliance is manufactured according to the above-mentioned design method, and the manufacturing method includes: a manufacturing method of first hot pressing and then cutting or a direct 3D printing method.

[0045] Compared with the prior art, the beneficial effects of the present invention include at least the following:

[0046] This invention discloses a shell-shaped orthodontic appliance, which employs a sagittal adjustment portion on the lingual side of the anterior tooth region of the shell-shaped body. This adjustment portion can adjust the positional relationship between the mandible and the maxilla, and at least partially offset the deformation of the shell-shaped body caused by occlusion. When the mandible and maxilla interact, the sagittal adjustment portion contacts the mandible. The geometric structure of the sagittal adjustment portion stabilizes the occlusal relationship between the mandible and the maxilla, reduces the occlusal deformation caused by the shell-shaped body, and adjusts the position of the mandibular anterior teeth relative to the maxilla in the sagittal direction to the target occlusal position. This invention addresses the problem of adjusting the sagittal position of the mandibular anterior teeth while reducing the occlusal deformation caused by the shell-shaped orthodontic appliance using an invisible aligner.

[0047] The orthodontic kit disclosed in this invention includes an upper jaw appliance and a lower jaw appliance. The upper jaw appliance is a shell-shaped appliance with a sagittal adjustment section, while the lower jaw appliance includes a lower jaw shell-shaped body for the lower teeth. The upper and lower jaws are treated simultaneously. For patients with a deep lower jaw Spee curve, the lower anterior teeth can be depressed or the posterior teeth can be raised to flatten the Spee curve, so that the upper and lower jaw teeth are corrected while the relationship between the upper and lower jaws is adjusted, thus achieving simultaneous orthodontic treatment.

[0048] The orthodontic system provided by this invention comprises a series of shell-shaped orthodontic appliances with sagittal adjustment sections, enabling teeth to be gradually repositioned from their initial positions to target positions. It also adjusts the relative sagittal position of the mandibular anterior teeth relative to the maxilla. Another orthodontic system provided by this invention consists of a series of orthodontic sets that can be worn simultaneously on both the upper and lower jaws, allowing for adjustment of the maxillary-mandibular occlusal relationship while simultaneously correcting the gradual repositioning of the upper and lower teeth from their initial positions to target positions. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the structure of a shell-shaped orthodontic appliance 10 according to one embodiment of the present invention.

[0050] Figure 2 A flowchart illustrating the design method of the shell-shaped orthodontic appliance provided by this invention.

[0051] Figure 3 for Figure 1 Partial sectional view along the A-A' direction.

[0052] Figure 4 for Figure 1 A partial cross-sectional view showing the height difference between the accommodating space and the first reinforcing part in the A-A' direction.

[0053] Figure 5 This is a movement trend diagram of the interaction between the upper and lower jaws according to one embodiment of the present invention.

[0054] Figure 6 This is a partial cross-sectional view of a shell-shaped orthodontic appliance with a first reinforcing part having a multi-layered structure, according to one embodiment of the present invention.

[0055] Figure 7 This is a schematic diagram of the structure of a shell-shaped orthodontic appliance 20 according to one embodiment of the present invention.

[0056] Figure 8 for Figure 7 Partial sectional view along the B-B' direction.

[0057] Figure 9This is a partial cross-sectional view of a shell-shaped orthodontic appliance with reinforcing blocks according to one embodiment of the present invention.

[0058] Figure 10 This is a schematic diagram of the structure of a shell-shaped orthodontic appliance 30 according to one embodiment of the present invention.

[0059] Figure 11 for Figure 10 Partial sectional view along the C-C' direction.

[0060] Figure 12 This is a diagram showing the movement trend of the interaction between the upper and lower jaws in one of the orthodontic appliance sets of the present invention.

[0061] Figure 13 This is a partial cross-sectional view of a shell-shaped orthodontic appliance with a guide surface according to one embodiment of the present invention.

[0062] Figure 14 This is a lateral view of the skull of a patient in the initial state according to the present invention.

[0063] Figure 15 This is a lateral cephalometric view of a patient wearing the shell-shaped orthodontic appliance according to the present invention. Detailed Implementation

[0064] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, but do not exclude other elements or objects.

[0065] For deep coverage In this case, during orthodontic treatment, a removable maxillary appliance is typically used to maintain the height of the alveolar bone in the anterior teeth, while the focus is on raising the height of the posterior teeth, starting with the last tooth and gradually adjusting each one. A pad is used to allow each pair of teeth to elongate and contact. After the posterior teeth have increased in height, the lingual misalignment of the anterior teeth and the distal misalignment of the posterior teeth are corrected. Another method involves placing a flat guide on the lingual side of the maxillary anterior teeth area. However, this method requires fixing a flat guide made of metal and resin to the maxilla, which not only causes some teeth to be suspended after wearing, but also affects the patient's chewing and causes a strong foreign body sensation. This invention uses a shell-shaped orthodontic appliance with a sagittal adjustment part, which can adjust the position of the mandibular anterior teeth relative to the maxilla in the sagittal direction to the target occlusal position. Simultaneously, it can at least partially counteract the deformation of the shell-shaped appliance caused by occlusion, and the intraoral foreign body sensation is reduced, making it more comfortable for the patient.

[0066] Example

[0067] like Figure 1 As shown, the shell-shaped orthodontic appliance 10 provided by the present invention is used to adjust the relationship between the upper and lower jaws and can at least partially offset the deformation of the shell-shaped body caused by occlusion; specifically,

[0068] The shell-shaped orthodontic appliance 10 includes a shell-shaped body 100, which has a cavity for accommodating multiple teeth. The shell-shaped body 100 also has a sagittal adjustment part 110, which adjusts the positional relationship between the upper and lower jaws and can at least partially offset the deformation of the shell-shaped body caused by occlusion. The sagittal adjustment part 110 is at least partially connected to the lingual side of the shell-shaped body 100. When the upper and lower jaws interact, the sagittal adjustment part 110 contacts the lower jaw. The sagittal adjustment part 110 has a geometric structure that adjusts the position of the lower anterior teeth relative to the upper jaw in the sagittal direction to the target occlusal position while stabilizing the occlusal relationship between the upper and lower jaws and reducing the occlusal deformation of the shell-shaped body 100.

[0069] The design method of the above-mentioned shell-shaped orthodontic appliance 10 is as follows: Figure 2 As shown, the steps include the following:

[0070] S1: Obtain a digital dental model: Obtain a digital dental model, which includes a digital tooth model body;

[0071] S2: Design of shell-shaped dental appliance 10: A shell-shaped dental appliance 10 is designed based on a digital dental model. The shell-shaped dental appliance 10 includes a shell-shaped body 100 designed based on the digital dental model and a sagittal adjustment part 110 that is at least partially connected to the lingual side of the shell-shaped body 100. The sagittal adjustment part 110 is designed to have a geometric structure that adjusts the position of the mandibular anterior teeth relative to the maxilla in the sagittal direction to the target occlusal position while stabilizing the occlusal relationship between the mandible and the maxilla and reducing the occlusal deformation generated by the shell-shaped body.

[0072] The shell-shaped body 100 can be configured with several cavities to accommodate multiple teeth, and is divided into anterior and posterior regions. The "posterior region" is defined according to the tooth classification in the 2nd edition of *Introduction to Stomatology*, published by Peking University Medical Press, pages 36-38, and includes premolars and molars, teeth marked as 4-8 using the FDI notation. The anterior region is marked as 1-3 using the FDI notation. The anterior region of the shell-shaped body 100 can accommodate the central incisors, lateral incisors, and canines of the maxilla, while the posterior region can accommodate the first premolar, second premolar, first molar, second molar, and third molar of the maxilla. The shell-shaped body 100 has several cavities to accommodate multiple teeth, and is divided into lingual and labial surfaces, and mesial and distal surfaces. The term "lingual surface" is based on the nomenclature of the various surfaces of the tooth crown as described on pages 35-36 of the 2nd edition of *Introduction to Stomatology*, published by Peking University Medical Press. The labial and buccal surfaces are the surfaces of the crown of anterior teeth that are closest to the lips, while the buccal surfaces are the surfaces of the crown of posterior teeth that are closest to the cheek. The lingual surface is the surface of the crown of both anterior and posterior teeth that is closest to the tongue. The mesial and distal surfaces are the two surfaces of the crown that are adjacent to the adjacent teeth, collectively called the proximal surfaces. The surface closer to the facial midline is called the mesial surface, and the surface farther from the facial midline is called the distal surface.

[0073] The explanation of the names of the various surfaces of the tooth crown on page 44 of the second edition of "Dental Anatomy and Oral Physiology" and Figure 6-8 In this context, the "incisal edge" refers to the part of the anterior teeth that performs the incisive biting function. On the lingual surface of the anterior teeth, a rounded ridge forms, called the "incisal ridge"; while on the labial surface, it is generally smoother and called the "incisal edge." Page 43 defines the "tripartitioning of the tooth body." To clearly identify the location of a specific part on each surface of the tooth, the crown and root are often divided into three equal parts. For example, the lingual surface can be divided into the mesial 1 / 3, middle 1 / 3, and distal 1 / 3; the proximal surface can be divided into the buccal 1 / 3, middle 1 / 3, and lingual 1 / 3; the labial surface can be divided into the incisal 1 / 3, middle 1 / 3, and cervical 1 / 3; and for posterior teeth, it is the occlusal 1 / 3, middle 1 / 3, and cervical 1 / 3.

[0074] In some embodiments of the present invention, the shell-shaped body 100 can also adjust the plurality of teeth from the initial position to the target orthodontic position. The initial position of the teeth can be the initial position of the teeth to be orthodontized, or any position before orthodontic treatment during the orthodontic process. The target orthodontic position of the teeth can be any position that is closer to the orthodontic target than the initial position.

[0075] In some embodiments of the present invention, such as Figure 1 and Figure 3As shown in the sagittal section (i.e., along section A-A'), the sagittal adjustment portion 110 includes a sidewall extending from the lingual side of the anterior region of the shell-like body 100, forming an accommodating space 111. The accommodating space 111 accommodates at least a portion of the incisal edge or adjacent incisal edge of the mandibular anterior teeth. It also includes a first reinforcing portion 112 that at least partially counteracts the deformation of the shell-like body caused by occlusion. One end of the first reinforcing portion 112 is connected to the end of the sidewall away from the shell-like body 100. More specifically, the lingual end of the shell-like body 100 in the anterior region extends and curves away from the maxillary anterior teeth. The sidewall of the accommodating space 111 formed by this curvature can be a smoothly transitioned curved surface or an extended surface enclosed by polygons. That is, the side of the accommodating space 111 adjacent to the maxillary anterior teeth is connected to the lingual side of the shell-like body 100 in the anterior region, while the side of the accommodating space 111 away from the maxillary anterior teeth is connected to the first reinforcing portion 112. The specific location of the connection between the accommodating space 111 and the lingual side of the anterior tooth region of the shell-shaped body 100 can be either near the gingival margin on the lingual side of the anterior tooth region of the shell-shaped body 100 or near the lingual fossa of the anterior tooth region accommodated by the shell-shaped body 100. Specifically, the connection point can be a point extending from the lingual gingival margin of the anterior tooth region of the shell-shaped body 100 to a location 1 / 4 to 1 / 2 of the length of the crown of the anterior tooth region accommodated. That is, the connection point is not at the lingual gingival margin of the anterior tooth region of the shell-shaped body, but rather extends from either the lingual gingival margin of the anterior tooth region of the shell-shaped body 100 or near the lingual fossa of the anterior tooth region accommodated by the shell-shaped body 100, towards the side away from the maxillary anterior tooth region. The accommodating space 111 accommodates at least the incisal edge or a portion of the adjacent incisal edge of the mandibular anterior tooth region, more specifically, "overlapping..." Overbite refers to the vertical distance by which the maxillary teeth overlie the mandibular teeth, generally 1-3 mm. In the anterior teeth, if the overlying portion does not exceed one-third of the labial surface of the incisors, it is considered a normal overbite. Those who exceed this become deeply covered. The degree of overbite depends on where the incisal edge of the mandibular incisor bites onto the lingual surface of the maxillary incisor. If it bites onto the incisal third, it is considered a normal overbite. Overbite that is within the middle third of the bite is called a first-degree deep overbite. A deep overbite that bites within the neck's first third is called a second-degree deep overbite. A bite extending into the neck more than one-third is called a third-degree deep overbite. The accommodating space 111 accommodates the incisal edge or a portion of the adjacent incisal edge of the mandibular anterior teeth, which may include the following situations: 1) the incisal edge is the incisal 1 / 3 of the labial surface of the mandibular anterior teeth; 2) a portion of the adjacent incisal edge is the adjacent 1 / 3 of the labial surface of the mandibular anterior teeth, such as between 1 / 4 and 1 / 3 or between 1 / 3 and 1 / 2, with a more preferred approach being between 1 / 4 and 1 / 3, in which case the vertical distance by which the maxillary teeth cover the mandibular teeth does not exceed the incisal 1 / 3 of the labial surface of the mandibular incisors.

[0076] In one embodiment of the present invention, such as Figure 4 and Figure 5 As shown, in the sagittal section along the long axis of the tooth, the area where the first reinforcing part 112 contacts the mandible is closer to the incisal edge of the maxillary anterior region than the area where the accommodating space 111 contacts the mandible. In other words, there is a height difference Δh between the area where the first reinforcing part 112 contacts the mandible and the area where the accommodating space contacts the mandible. For deep overbite... The patient, after wearing a shell-shaped orthodontic appliance for 10 years, such as Figure 5 As shown, the mandibular anterior teeth first contact the first reinforcing part 112, and then, with the biting action of the upper and lower jaws, the incisal edge of the mandibular anterior teeth enters the receiving space 111, that is, it contacts the receiving space 111 later. The final stable contact point between the mandibular anterior teeth and the maxilla is the furthest point of the receiving space 111 from the incisal ridge of the maxillary anterior teeth. The height difference Δh allows the incisal edge of the mandibular anterior teeth to be contained within the receiving space 111, and adjusts the position of the mandibular anterior teeth relative to the maxilla in the sagittal direction to the target occlusal position. The target occlusal position is when the vertical distance by which the maxilla covers the mandibular teeth does not exceed the incisal 1 / 3 of the labial surface of the mandibular incisors.

[0077] In some embodiments of the present invention, such as Figure 3 As shown, in the sagittal section, the first included angle α formed at the connection between the first reinforcing part 112 and the free end of the sidewall of the accommodating space 111 is 90°≤α≤160°; one specific form is that the first included angle α can be 90°, in which case the first reinforcing part 112 and the free end of the sidewall of the accommodating space 111 are perpendicular to each other. Of course, the included angle can also be any angle greater than 90° and less than or equal to 160°, that is, the first included angle α formed by the connection between the first reinforcing part 112 and the sidewall of the accommodating space 111 is an obtuse angle. All of the above embodiments are possible. The first included angle is 90°≤α≤160°. The first reinforcing part 112 extends along the side away from the teeth in the maxillary anterior region. When it comes into contact with the mandible, it will form a guiding surface that guides the mandible to slide into the accommodating space 111. When the mandible and mandible interact, the mandible tends to move relative to the position of the mandible in the sagittal direction toward the target occlusal position.

[0078] In some embodiments of the present invention, the connection between the first reinforcing part 112 and the shell-shaped body 100 is a smoothly transitioning curved surface. More specifically, the connection between the free end of the first reinforcing part 112 extending in the distal direction and the shell-shaped body 100 is a smoothly transitioning curved surface. This configuration allows for a smooth transition surface at the junction of the free end of the first reinforcing part 112 extending distally with the shell-shaped body 100. The side of the first reinforcing part 112 adjacent to the maxillary anterior teeth connects to the side of the receiving space 111. At this time, the side of the first reinforcing part 112 adjacent to the maxillary anterior teeth is the mesial end, while the free end of the first reinforcing part 112 extending distally is the side extending in the opposite direction to the mesial end of the side of the first reinforcing part 112 adjacent to the maxillary anterior teeth. The free end of the first reinforcing part 112 extending distally can be the free end connecting the left and right anterior teeth regions of the shell-shaped body 100. The junction of this free end with the left and right sides of the shell-shaped body 100 has a smooth transition surface. This configuration makes the surface of the shell-shaped orthodontic appliance 10 that contacts the oral cavity more rounded or smooth, resulting in less foreign body sensation in the oral cavity and greater comfort for the patient. In one embodiment, the first reinforcing part 112 extends from the free end of the side wall of the accommodating space 111 in the anterior tooth region of the shell-shaped body 100 toward the distal direction, and the connection between the first reinforcing part 112 and the cavity on the left and right sides of the shell-shaped body 100 that accommodates the first premolar is a smoothly transitioning curved surface. More specifically, the connection between the first reinforcing part 112 and the mesial end face of the cavity accommodating the first premolar on the left and right sides of the shell-shaped body 100 is a smoothly transitioning curved surface. That is, the connection between the first reinforcing part 112 and the left and right sides of the shell-shaped body 100 is from the mesial end face of the cavity accommodating the first premolar. More specifically, since the first premolar has a buccal cusp and a lingual cusp on the occlusal surface, while the canine has only one cusp on the occlusal surface, when making a smooth transition, the connection width of the connection between the first reinforcing part 112 and the shell-shaped body 100 (that is, the sagittal mesial width of the first reinforcing part 112) can partially fill the problem of unsmooth connection caused by the difference in the occlusal surfaces of the canine and the first premolar. That is, the connection between the first reinforcing part 112 and the mesial end face of the shell-shaped body 100 accommodating the first premolar fills part of the canine area or the occlusal surface of the other anterior teeth to compensate for the connection, thereby achieving a smooth transition at the connection.

[0079] In some embodiments of the present invention, the width of the first reinforcing part 112 in the mesiodistal direction in the sagittal section is 2-5 mm. This width allows the mandible to contact the first reinforcing part first when it comes into contact with the maxilla, thereby guiding the mandible into the receiving space 111 and causing the mandible to move relative to the maxilla in the sagittal direction toward the target occlusal position. In addition, this width reduces the width of the sagittal adjustment part 110 covering the maxilla, which not only reduces the foreign body sensation in the patient's mouth but also facilitates the fabrication of the shell-shaped orthodontic appliance 10. It reduces the use of maxillary information. When collecting information in the patient's mouth, traditional intraoral impression methods can be used, followed by scanning to obtain the corresponding digital information. Alternatively, an intraoral scanner can be used to acquire intraoral information. Both of these acquisition methods only require maxillary teeth and some gingival information to complete the design and fabrication of the corresponding products.

[0080] In some embodiments of the present invention, such as Figure 1 As shown, the side of the first reinforcing part 112 away from the maxillary anterior teeth basically matches the curvature of the anterior teeth region. Specifically, the basic match includes the first reinforcing part being consistent with the curvature of the anterior teeth region on the side away from the maxillary anterior teeth region, and similar to the curvature of the anterior teeth region on the side away from the maxillary anterior teeth region. The variation range of the similar curvature is ±10 degrees, ensuring that the side of the first reinforcing part away from the maxillary anterior teeth region has a concave curvature towards the incisors similar to that of the anterior teeth region. This setting provides a relatively large space for the tongue after the patient wears the device, and reduces the foreign body sensation of the tongue while adjusting the relationship between the upper and lower jaws.

[0081] In some embodiments of the present invention, the elastic modulus of the first reinforcing part 112 is greater than that of the shell-shaped body 100. The first reinforcing part 112 has a larger elastic modulus, which can at least partially offset the deformation of the shell-shaped body 100 caused by occlusion. During maxillary and mandibular occlusion, the mandible first contacts the first reinforcing part 112. At this time, the first reinforcing part 112 needs to generate sufficient strength to support the generated occlusal force. Therefore, the elastic modulus of the first reinforcing part 112 is greater than that of the shell-shaped body 100. Meanwhile, the elastic modulus of the shell-shaped body 100 is smaller, making it more comfortable for the patient to wear. It should be noted that the shell-shaped body 100 can have a geometric structure that causes relative displacement of the teeth, or it can simply have the function of wrapping the teeth. In one embodiment, the hardness of the first reinforcing part 112 is greater than the hardness of the shell-shaped body 100. More specifically, the Shore hardness of the first reinforcing part 112 is 65D-80D, such as any one of 65D, 70D, 75D, or 80D, or other values ​​within this range, or any two points being the apex of the range; the Shore hardness of the shell-shaped body 100 is 50D-75D, such as any one of 50D, 55D, 60D, 65D, 70D, or 75D, or other values ​​within this range, or any two points being the apex of the range. This arrangement ensures that during maxillary and mandibular occlusion, the first reinforcing part 112 is sufficient to generate support for the occlusal force generated by contact with the mandible, thereby reducing the occlusal deformation of the first reinforcing part 112 and the shell-shaped body 100. In another embodiment, such as... Figure 6As shown, the first reinforcing part 112 has a multi-layer structure, wherein at least one reinforcing layer 1121 at least partially covers the base layer. The base layer and the reinforcing layer 1121 can be made of the same material or different materials. The base layer can be made of the same material as the shell-shaped body 100 and / or the accommodating space 111, or the base layer, shell-shaped body 100, and / or accommodating space 111 can be integrally formed. In one preferred embodiment, the elastic modulus of the reinforcing layer 1121 is greater than that of the base layer, that is, the reinforcing layer 1121 can support the upper and lower jaws during biting and prevent the biting force generated from causing biting deformation of the shell-shaped body 100. In the above embodiment, the thickness of the first reinforcing part 112 is 0.7-2.0 mm, such as any one of 0.7 mm, 1.0 mm, 1.5 mm or 2.0 mm or other values ​​within this range, or any two points within the range's apex; the thickness of the shell-like body is 0.5-1.0 mm, such as any one of 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1.0 mm or other values ​​within this range, or any two points within the range's apex; within the above range, the overall thickness of the first reinforcing part 112 formed by the multi-layer structure is greater than the thickness of the shell-like body 100, ensuring that the first reinforcing part 112 generates sufficient strength to support the generated biting force while the interaction between the shell-like body 100 and the teeth makes the patient more comfortable to wear.

[0082] In some embodiments of the present invention, the first reinforcing part 112 and the shell-shaped body 100 are made of the same material, such as PETG, PC, or TPU. Alternatively, they can be other polymeric materials that are safe for use in the oral cavity and have medical device safety features, thus providing both safety and orthodontic effects. In other embodiments, the first reinforcing part 112 and the shell-shaped body 100 are made of different single materials or different multilayer composite materials. More specifically, when the first reinforcing part 112 and the shell-shaped body 100 are different single materials, they can be any combination of two of PETG, PC, or TPU. The first reinforcing part 112 and the shell-shaped body 100 can be made of different materials during design or fabrication. For example, if the shell-shaped body 100 is made of TPU, the first reinforcing part 112 can be made of PETG. In this case, the diaphragm prepared by thermoforming can be made of locally different materials, or different materials can be used for localized areas during 3D direct printing. When the first reinforcing part 112 is a multilayer composite material of a different type from the shell-shaped body 100, it can be a multilayer composite material composed of any combination of PETG, PC, or TPU. The first reinforcing part 112 can be a multilayer composite material, while the shell-shaped body 100 can be a single material; the first reinforcing part 112 can be a single material, while the shell-shaped body 100 can be a multilayer composite material; both the first reinforcing part 112 and the shell-shaped body 100 can be multilayer composite materials. More specifically, the first reinforcing part 112 is a multilayer composite material different from the shell-shaped body 100, such as... The shell-shaped body 100 is a single-layer structure or a multi-layer composite structure, while the first reinforcing part 112 is a multi-layer composite material. One layer of the multi-layer structure of the first reinforcing part 112 may be the same as or different from that of the shell-shaped body 100. For example, the first reinforcing part 112 may be composed of a double-layer composite material, specifically PETG and TPU, while the shell-shaped body 100 is made of PETG; or the first reinforcing part 112 may be composed of a double-layer composite material, specifically PETG and TPU, while the shell-shaped body 100 may be composed of a double-layer composite material, specifically PETG and PC. The above examples are only some preferred embodiments. Various material combinations that can achieve the effects of this invention are within the scope of protection of this invention and will not be elaborated further here.

[0083] In some embodiments of the present invention, such as Figure 7 and Figure 8As shown in the sagittal section (i.e., along section B-B'), the first reinforcing part 112 of the shell-shaped orthodontic appliance 20 has a second reinforcing part 113 at one end in the distal direction, which, together with the first reinforcing part 112, forms a receiving space. The first reinforcing part 112 and the second reinforcing part 113 are arranged at a second angle. The first reinforcing part 112 extends distally in the sagittal section direction, while the second reinforcing part 113 extends at a second angle to the first reinforcing part 112. That is, the extension directions of the first reinforcing part 112 and the second reinforcing part 113 are different. In a preferred embodiment, the second angle is β, and 90°≤β<180°. In this arrangement, the second reinforcing part 113... The first reinforcing part 112 is a planar or curved surface structure. When both the first reinforcing part 112 and the second reinforcing part 113 are planar, the angle between the first reinforcing part 112 and the second reinforcing part 113 is a second angle formed by the extension directions of the two parts. When the first reinforcing part 112 and the second reinforcing part 113 are curved surfaces, the angle formed by the two parts is a second angle formed by the tangents from the connection point to the extension directions of the two parts. When one of the first reinforcing part 112 or the second reinforcing part 113 is a curved surface and the other is a planar surface, the angle formed by the two parts is a second angle formed by the tangent direction at the connection point between the curved surface and the planar surface and the extension direction of the planar surface. The range of the second included angle β is 90°≤β<180°. In this configuration, when the second included angle β is 90°, that is, the connection between the first reinforcing part 112 and the second reinforcing part 113 is perpendicular, when the upper and lower jaws perform biting actions, the lower anterior teeth gradually slide from the area in contact with the first reinforcing part 112 into the receiving space 111, and the second reinforcing part 113 and the first reinforcing part 112 enclose a receiving space. In the sagittal section direction, the second reinforcing part 113 provides a direct force or a force decomposed in this direction along the long axis of the tooth, enhancing the supporting effect of the first reinforcing part 112 during upper and lower jaw biting, and assisting in partially offsetting the deformation of the shell-like body caused by biting. To provide a stronger supporting effect, in some preferred embodiments, such as Figures 9-11 As shown in the sagittal section (i.e., along the C-C' section), the enclosed receiving space also includes a reinforcing block 114. The reinforcing block 114 is a reinforcing block made of a material suitable for use in the intraoral cavity of medical devices, such as a medical-grade polymer resin-filled or pre-formed polymer material structure. To ensure the stable relationship of the reinforcing block 114 within the receiving space, mating male and female structures, such as 10 and..., are also provided on the reinforcing block 114 and the second reinforcing part 113. Figure 11As shown, in one preferred embodiment, the second reinforcing part 113 of the shell-shaped orthodontic appliance 30 is provided with a protruding bubble 1131 protruding distally. The contact area between the reinforcing block 114 (reinforcing block) and the second reinforcing part 113, corresponding to the protruding bubble 1131, is also provided with a protrusion that cooperates with the protruding bubble 1131. The two cooperate to ensure that the reinforcing block 114 is stably placed within the receiving space formed by the first reinforcing part 112 and the second reinforcing part 113, preventing the reinforcing block 114 from being accidentally swallowed by the patient due to unstable bonding, thus avoiding unnecessary medical accidents. Of course, the above-described concave-convex matching is a preferred embodiment; other structures that can increase the mutual stability between the second reinforcing part 113 and the reinforcing block 114 are also within the scope of protection of this invention and will not be described further here.

[0084] In some embodiments of the present invention, the accommodating space 111 is a structure continuously or partially continuously distributed inwardly recessed on the lingual side of the maxillary anterior teeth towards the palatal direction. This concave structure can effectively accommodate at least a portion of the mandibular anterior teeth, thereby adjusting the position of the mandibular anterior teeth relative to the maxilla in the sagittal direction to the target occlusal position; furthermore, when the accommodating space 111 is a structure continuously distributed inwardly recessed on the lingual side of the maxillary anterior teeth towards the palatal direction, such as Figure 12As shown, the concave structure formed by the accommodating space 111 can be regarded as a continuous ridge structure, which can reduce the buccal-lingual or sagittal deformation generated by the shell-shaped body 100. More specifically, when the upper and lower jaws bite, when the mandibular anterior teeth contact the shell-shaped orthodontic appliance, the mandibular anterior teeth act on the first reinforcing part 112 of the shell-shaped orthodontic appliance and then enter the target position, i.e., the accommodating space 111. At this time, the mandible generates an upward biting force against the palate. If the first reinforcing part 112 or the strong part of the accommodating space 111 in contact with the mandible... When the degree is small, the shell-shaped body 100 will produce sagittal deformation. For example, the stretching of the shell-shaped body 100 on the lingual side of the anterior tooth region may indirectly cause the corresponding anterior teeth covered by the shell-shaped body 100 to be depressed. Another situation may also produce buccal-lingual deformation. For example, when the mandible and the first reinforcing part 112 come into contact with each other, while the shell-shaped body 100 produces sagittal deformation, it may also cause both sides of the posterior teeth covered by the shell-shaped body 100 to move lingually, resulting in unexpected lingual tilting or arch contraction of the corresponding teeth. When the accommodating space 111 is a partially continuous structure formed by indentation on the lingual side of the teeth in the maxillary anterior region towards the gingiva, the accommodating space 111 can be multiple structures dispersed indented on the lingual side of the teeth in the maxillary anterior region towards the gingiva. These indented structures can accommodate at least a portion of the mandibular anterior region's teeth, such as the area adjacent to the incisal edge. For example, the accommodating space 111 may consist of six indented structures dispersedly accommodating two central incisors, two lateral incisors, and two canines in the mandibular anterior region. These six indented structures match the shape of the corresponding mandibular teeth or the orthodontic appliance that covers the corresponding mandibular teeth. In one preferred embodiment, the indented structure is an arched structure. When the arched structure contacts the mandibular anterior region's teeth, it accommodates a portion of the adjacent incisal edge of the mandibular anterior region's teeth. At this time, the position of the mandibular anterior region's teeth relative to the maxilla is in the sagittal direction towards the target occlusal position, i.e., the vertical distance by which the maxilla covers the mandibular teeth does not exceed one-third of the labial incisal surface of the mandibular incisors, matching the target occlusal position of the mandible. More specifically, the height difference Δh of the accommodating space 111 along the long axis of the tooth in the sagittal section is 1 / 4 to 1 / 2 of the length of the crown of the mandibular anterior teeth along the long axis. At this point, the design can be made according to the patient's own target position for orthodontic treatment, so that when the mandibular occlusion reaches the final target orthodontic position, the vertical distance by which the maxillary teeth cover the mandibular teeth does not exceed 1 / 3 of the labial incisal surface of the mandibular incisors, achieving deep overbite. Orthodontic treatment for patients. In another embodiment, the width of the accommodating space 111 in the sagittal section along the mesiodistal direction is 1.5-4.0 mm. This width range coincides with the width of the corresponding sagittal section of the mandibular anterior teeth along the mesiodistal direction. That is, this width range can better accommodate the corresponding width of the mandibular anterior teeth, so that the mandibular anterior teeth can remain stable within the accommodating space 111, that is, the target occlusal position of the mandible is stable, so as to ensure the relative positional relationship of the maxilla and mandible.

[0085] In one embodiment of the present invention, the elastic modulus of the accommodating space 111 is greater than that of the shell-shaped body 100. When the mandible and mandible occlude, the accommodating space 111, which is in stable contact with the mandible and mandible, comes into contact, the accommodating space 111 needs to generate sufficient strength to support the generated occlusal force. Therefore, the elastic modulus of the accommodating space 111 is greater than that of the shell-shaped body 100. Meanwhile, the elastic modulus of the shell-shaped body 100 is smaller, making it more comfortable for the patient to wear. It should be noted that the shell-shaped body 100 can have a geometric structure that allows it to wrap around the teeth and cause relative displacement, or it can simply have the function of wrapping around the teeth. In one embodiment, the hardness of the accommodating space 111 is greater than the hardness of the shell-shaped body 100. More specifically, the Shore hardness of the accommodating space 111 is 65D-80D, such as any one of 65D, 70D, 75D or 80D, or other values ​​within this range, or any two points being the apex of the range; the Shore hardness of the shell-shaped body 100 is 50D-75D, such as any one of 50D, 55D, 60D, 65D, 70D or 75D, or other values ​​within this range, or any two points being the apex of the range; this arrangement enables the accommodating space 111 to generate sufficient support for the biting force generated by contact with the mandible during maxillary and mandibular occlusion, thereby reducing the biting deformation generated by the accommodating space 111 and the shell-shaped body 100. In another embodiment, the accommodating space 111 has a multi-layer structure, including a base layer and at least one reinforcing layer. The base layer and the reinforcing layer can be made of the same material or different materials. The base layer can be made of the same material as the shell-like body 100, or the base layer and the shell-like body 100 can be integrally formed. In a preferred embodiment, the elastic modulus of the reinforcing layer is greater than that of the base layer, that is, the reinforcing layer can support the upper and lower jaws during occlusion and prevent the occlusal force generated from occlusal deformation of the shell-like body 100. In the above embodiments, the thickness of the accommodating space 111 is 0.7-2.0 mm, such as any one of 0.7 mm, 1.0 mm, 1.5 mm or 2.0 mm or other values ​​within this range, or any two points within the range's apex; the thickness of the shell-like body is 0.5-1.0 mm, such as any one of 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1.0 mm or other values ​​within this range, or any two points within the range's apex; within the above range, the overall thickness of the accommodating space 111 formed by the multi-layer structure is greater than the thickness of the shell-like body 100. This ensures that the accommodating space 111 generates sufficient strength to support the generated biting force, assists in partially offsetting the deformation of the shell-like body caused by biting, and at the same time, the interaction between the shell-like body 100 accommodating the teeth and the teeth makes the patient more comfortable to wear.

[0086] In one embodiment of the present invention, such as Figure 13 As shown, the sidewalls of the accommodating space 111 include a mesial accommodating sidewall 1112 and a distal accommodating sidewall 1111. The mesial accommodating sidewall 1112 is at least partially connected to the lingual side of the anterior tooth region of the shell-like body 100 on the side adjacent to the maxillary incisal edge. The side of the mesial accommodating sidewall 1112 away from the maxillary incisal edge is at least partially connected to one end of the distal accommodating sidewall 1111. The other end of the distal accommodating sidewall 1111 is at least partially connected to the first reinforcing portion 112. In one embodiment, the mesial accommodating sidewall 1112 is continuously connected to the lingual side of the anterior tooth region of the shell-shaped body 100 on the side adjacent to the maxillary incisal edge, thereby enhancing the stability of the accommodating space 111 during maxillary occlusion. In another embodiment, the mesial accommodating sidewall 1112 is connected to the lingual side of the anterior tooth region of the shell-shaped body 100 on the side adjacent to the maxillary incisal edge. Specifically, it can be a partially connected spaced space to form a gap or a perforation. This arrangement not only ensures the stability of maxillary occlusion but also increases the breathability of the patient's mouth, preventing bacterial growth in the patient's mouth due to prolonged wearing in a closed environment. In some embodiments, the mesial receiving sidewall 1112, on the side away from the maxillary incisal edge, is continuously connected to one end of the distal receiving sidewall 1111, enhancing the stability of the receiving space 111 during maxillary and mandibular occlusion. In another embodiment, the mesial receiving sidewall 1112, on the side away from the maxillary incisal edge, is partially connected to one end of the distal receiving sidewall 1111, forming a slit or slit hole. This arrangement ensures the stability of maxillary and mandibular occlusion while also increasing the breathability of the patient's clothing, preventing bacterial growth in the patient's mouth due to prolonged wearing in a closed environment. In some embodiments, the other end of the distal receiving sidewall 1111 is continuously connected to the first reinforcing part 112, enhancing the stability of the receiving space 111 during maxillary and mandibular occlusion. In another embodiment, the other end of the distal receiving sidewall 1111 is partially connected to the first reinforcing part 112, forming a gap or spacer. This arrangement ensures the stability of maxillary and mandibular occlusion while increasing the breathability of the patient's clothing, preventing bacterial growth in the patient's mouth due to prolonged wearing in a closed environment. The above-mentioned embodiments can be tailored to the specific needs of the actual case, allowing for continuous or partial connection of specific components, improving patient comfort and oral environment while achieving the desired orthodontic effect. Of course, a planar or curved structure can also be provided between the mesial receiving sidewall 1112 and the distal receiving sidewall 1111 to match the incisal edge or incisal ridge of the mandibular anterior teeth, better accommodating and stabilizing the relative position of the mandibular anterior teeth.

[0087] In one embodiment of the present invention, the distal receiving sidewall 1111 is a guide surface with an inclined angle that guides the mandible to slide into the receiving space 111. The guide surface can be a guide plane, a guide curved surface, or a combination of a guide plane and a guide curved surface. When the guide surface is a plane, as shown in Figure 13, after the mandibular anterior teeth come into contact with the first reinforcing part 112, the mandibular anterior teeth slide into the receiving space 111 through the guiding action of the guide surface, thereby guiding the position of the mandibular anterior teeth relative to the maxilla to be adjusted to the target occlusal position in the sagittal direction. In another embodiment, the guiding surface can also be a curved guiding surface. This guiding surface can be a curved surface structure with only one arc, or a curved surface structure formed by connecting multiple arcs, or a structure formed by connecting a plane and a curved surface. For example, a plane can be connected to the first reinforcing part 112, or a curved surface can be connected to the first reinforcing part 112. The above structures can guide the position of the mandibular anterior teeth relative to the maxilla to the target occlusal position in the sagittal direction. All of these methods are within the protection scope of this invention. The specific connection position relationships of various combinations are not limited here. In a preferred embodiment of the present invention, when the distal receiving sidewall 1111 is a guiding plane or partially a guiding plane, the inclination angle on the sagittal section is the third included angle γ formed between the distal receiving sidewall 1111 and the occlusal plane, wherein 30°≤γ≤80°, and the third included angle γ is an acute angle. Its inclination angle can guide the mandibular anterior teeth to slide into the receiving space 111 and slide to the top of the receiving space 111 (i.e., the receiving space 111 is furthest from the incisal ridge of the maxillary anterior teeth) and the position within the receiving space 111 is relatively stable. In another preferred embodiment of the present invention, a stabilizing surface is further provided on the mesial receiving sidewall 1112. The stabilizing surface has an inclination angle that stabilizes the mandible within the receiving space 111. More specifically, the stabilizing surface is a stabilizing plane, a stabilizing curved surface, or a combination of a stabilizing plane and a stabilizing curved surface. This stabilizing curved surface can be a curved structure with only one arc segment, or a curved structure formed by connecting multiple arc segments, or a structure formed by connecting a plane and a curved surface. For example, the plane can be connected to the lingual side of the anterior tooth region of the shell-shaped body 100, or the curved surface can be connected to the lingual side of the anterior tooth region of the shell-shaped body 100. The above structures can stabilize the position of the mandibular anterior teeth relative to the maxilla in the sagittal direction and adjust it to the target occlusal position. All such methods are within the protection scope of the present invention. The specific connection position relationships of various combinations are not limited here. In a preferred embodiment of the present invention, when the mesial receiving sidewall is a guiding plane or partially a guiding plane, the inclination angle on the sagittal section is the fourth included angle δ formed between the mesial receiving sidewall and the occlusal plane, wherein 30°≤δ≤80°; the formed fourth included angle δ is an acute angle, and its inclination angle can stabilize the mandibular anterior teeth within the receiving space 111 so that they cannot slide, and stabilize them to the top of the receiving space 111 (i.e., the receiving space 111 is furthest from the incisal ridge of the maxillary anterior teeth).

[0088] In some embodiments of the present invention, the shell-shaped body 100 has a geometric structure that allows multiple teeth to gradually change from their initial positions to their target orthodontic positions. Specifically, when a patient wears the shell-shaped orthodontic appliance, the shell-shaped body 100 not only wraps around the teeth but also orthodontically corrects them. For example, it can adjust the position of the mandibular anterior teeth relative to the maxilla in the sagittal direction to the target occlusal position while gradually repositioning the teeth from their initial positions to the target positions. This not only improves the efficiency of the treatment at each stage but also enhances the overall orthodontic treatment plan. In a specific orthodontic case, such as for deep overbite... In cases where patients have a deep mandibular Spee curve, a shell-shaped orthodontic appliance can be used to adjust the relationship between the upper and lower jaws. Simultaneously, the shell body 100 of the appliance assists in depressing the lower anterior teeth or raising the posterior teeth to level the Spee curve, achieving simultaneous orthodontic treatment. In other implementations, the shell body 100 may simply cover the teeth without providing any orthodontic effect. This configuration enhances patient comfort, only adjusting the position of the mandibular anterior teeth relative to the maxilla in the sagittal direction to the target occlusal position, without affecting other teeth. This targeted treatment reduces discomfort caused by the shell body 100 during orthodontic treatment.

[0089] In some embodiments of the present invention, the shell-like body 100, the accommodating space 111, the first reinforcing part 112, and / or the second reinforcing part 113 are integrally formed or separately formed. More specifically, in one embodiment, the shell-like body 100, the accommodating space 111, and the first reinforcing part 112 are integrally formed. The shell-like body 100, the accommodating space 111, and the first reinforcing part 112 can be integrally thermoformed and then cut according to actual orthodontic needs, or directly 3D printed. When an integrally formed structure is used, the manufacturing process is simple, it is convenient for patients to wear, and the tight connection between the shell-like body 100, the accommodating space 111, and the first reinforcing part 112 ensures high wearing safety and prevents unnecessary injury caused by accidental ingestion due to instability between the shell-like body 100, the accommodating space 111, and the first reinforcing part 112. In another embodiment, the shell-shaped body 100, the accommodating space 111, and the first reinforcing part 112 are separately molded structures. These components can be connected separately using adhesive, magnetic attraction, or snap-fit ​​methods. This separate molding structure facilitates installation, allowing for the selection of shell-shaped body 100, accommodating space 111, and first reinforcing part 112 to achieve different orthodontic effects based on the patient's oral condition, thus providing personalized treatment. In other embodiments, the connection methods of the shell-shaped body 100 and / or accommodating space 111 and / or first reinforcing part 112 and / or second reinforcing part 113 are similar to the formation methods of the aforementioned integral or separate molding structures of the shell-shaped body 100, accommodating space 111, and first reinforcing part 112, and will not be described in detail here.

[0090] This invention also provides a dental orthodontic system comprising multiple shell-shaped dental appliances, wherein at least one of the multiple shell-shaped dental appliances is a shell-shaped dental appliance as described in any of the above embodiments, and the multiple shell-shaped dental appliances have a geometry that allows teeth to be gradually repositioned from an initial position to a target position. More specifically, this orthodontic system can be used for single-jaw orthodontic treatment, such as maxillary orthodontic treatment only. During the orthodontic process, the multiple shell-shaped dental appliances used achieve the orthodontic effect of gradually repositioning teeth from an initial position to a target position. For example, when the multiple shell-shaped dental appliances are worn on the maxillary teeth, the sagittal adjustment part 110 can adjust the position of the mandibular anterior teeth relative to the maxilla in the sagittal direction to the target occlusal position. At the same time, the shell-shaped body 100 has a geometry that allows teeth to be gradually repositioned from an initial position to a target position, so that the patient's teeth are treated simultaneously with the adjustment of the maxillary-mandibular relationship, achieving simultaneous orthodontic treatment and improving treatment efficiency while improving patient comfort.

[0091] In some embodiments of the present invention, a series of different shell-shaped orthodontic appliances can gradually move the teeth from an initial position to a target orthodontic position. The initial position is the relative position of the digital model collected when the patient seeks treatment, and the target orthodontic position is the position of the final orthodontic effect determined by clinicians and medical designers based on the patient's needs and intraoral condition. Due to individual differences, the intraoral conditions of different patients are different, and it is necessary to gradually move the teeth from the initial position to the target position. In this process, a series of different shell-shaped orthodontic appliances are needed to wear and treat the teeth.

[0092] The present invention also provides an orthodontic system comprising multiple sets of orthodontic kits, wherein at least one set is the aforementioned orthodontic kit, and the multiple sets of orthodontic kits have a geometry that gradually repositions the teeth from an initial position to a target position. The following is a detailed description of one set of orthodontic kits in this embodiment:

[0093] A set of orthodontic appliances includes a maxillary appliance and a mandibular appliance. The maxillary appliance is any of the shell-shaped appliances described in the above embodiments, and the mandibular appliance is a shell-shaped appliance worn opposite to the maxillary appliance. When the shell-shaped appliance is worn on the maxilla, the shell body 100 covers the maxillary teeth, and the sagittal adjustment part 110 adjusts the position of the mandibular anterior teeth relative to the maxilla in the sagittal direction to the target occlusal position. Simultaneously, the mandibular shell-shaped appliance is worn on the mandibular teeth, covering them. It can be a shell-shaped appliance that simply covers the mandibular teeth, or it can be a geometric structure that gradually repositions the mandibular teeth from their initial position to the target orthodontic position. Simultaneous treatment of the maxilla and mandible is achieved. For patients with a deep mandibular Spee curve, the mandibular anterior teeth can be lowered or the posterior teeth raised to flatten the Spee curve, allowing for simultaneous adjustment of the maxillary-mandibular position relationship and correction of the maxillary and mandibular teeth, thus achieving simultaneous orthodontic treatment.

[0094] In some embodiments of the present invention, a series of different shell-shaped orthodontic appliances can gradually move teeth from an initial position to a target orthodontic position. The initial position is the relative position of the digital model collected when the patient seeks treatment, and the target orthodontic position is the position of the final orthodontic effect determined by clinicians and medical designers based on the patient's needs and intraoral condition. Due to individual differences, the intraoral conditions of different patients are different, and it is necessary to gradually move the teeth from the initial position to the target position. In this process, a series of different shell-shaped orthodontic appliances are needed to wear and treat the teeth.

[0095] Through the wearing of the shell-shaped dental appliance, dental appliance set, dental orthodontic system, or orthodontic system as described above, the relative position of the patient's upper and lower jaws will change as follows: Figure 14The initial state shown is adjusted to be as follows Figure 15 The target correction location is shown in the figure.

[0096] The present invention also provides a method for manufacturing a shell-shaped orthodontic appliance. The design method involved in any of the above embodiments is used to manufacture the designed orthodontic appliance. The manufacturing method includes: a method of hot pressing followed by cutting or a method of direct 3D printing.

[0097] In some embodiments of the present invention, the manufacturing module in the preparation method can be an additive manufacturing machine, and the dental appliance is prepared by additive manufacturing technology. That is, the dental appliance is directly printed into a dental appliance after obtaining a finite element digital model of the dental appliance that meets the requirements by using 3D printing technology. The 3D printing technology can be SLA (stereolithography) or DLP (digital light projection).

[0098] In some embodiments of the present invention, the manufacturing module in the preparation method can also be a 3D printing device, a lamination device, a cutting device, a polishing device, and a cleaning and disinfection device. The specific preparation process is as follows: first, a finite element digital model of a 3D jaw model that meets the requirements is directly printed using 3D printing technology; second, a lamination operation is performed on the printed 3D jaw model; and finally, the lamination of the orthodontic appliance is cut, polished, cleaned, and disinfected to obtain the orthodontic appliance.

[0099] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A shell-shaped orthodontic appliance, comprising a shell-shaped body, wherein the shell-shaped body is provided with a cavity for accommodating multiple maxillary teeth, characterized in that, The shell-shaped body is further provided with a sagittal adjustment portion on the lingual side of the anterior tooth region, which can adjust the positional relationship between the mandible and the maxilla and at least partially offset the deformation of the shell-shaped body caused by occlusion. The sagittal adjustment portion is at least partially connected to the lingual side of the anterior tooth region of the shell-shaped body. The sagittal adjustment portion has a geometric structure that adjusts the position of the mandibular anterior teeth relative to the maxilla in the sagittal direction to the target occlusion position while stabilizing the occlusal relationship between the mandible and the maxilla and reducing the occlusal deformation of the shell-shaped body. The sagittal adjustment portion includes a sidewall extending and bending from the lingual side of the anterior tooth region of the shell-shaped body to form an accommodating space and a first reinforcing portion that at least partially offsets the deformation of the shell-shaped body caused by occlusion. The accommodating space at least accommodates the incisal edge or a portion of the adjacent incisal edge of the mandibular anterior teeth, and one end of the first reinforcing portion is connected to the end of the sidewall away from the shell-shaped body. The accommodating space is a groove that is continuously or partially continuously distributed on the lingual side of the teeth in the maxillary anterior region and is concave in the direction of the palate. The groove can reduce the buccal or sagittal deformation of the shell-like body. The width of the accommodating space in the sagittal section along the mesiodistal direction is 1.5-4.0 mm.

2. The shell-shaped orthodontic appliance according to claim 1, characterized in that, In the sagittal section along the long axis of the tooth, the area where the first reinforcing part contacts the mandible is closer to the incisal edge of the maxillary anterior tooth region than the area where the accommodating space contacts the mandible.

3. The shell-shaped orthodontic appliance according to claim 2, characterized in that, In the sagittal section, the first included angle formed at the connection between the first reinforcing part and the side wall of the accommodating space is α, where 90°≤α≤160°.

4. The shell-shaped orthodontic appliance according to claim 1, characterized in that, The connection between the first reinforcing part and the shell-shaped body is a smoothly transitioning curved surface.

5. The shell-shaped orthodontic appliance according to claim 4, characterized in that, The first reinforcing part is smoothly connected to the proximal end face of the cavity on the left and right sides of the shell-shaped body that accommodates the first premolar.

6. The shell-shaped orthodontic appliance according to claim 5, characterized in that, The curvature of the first reinforcing part on the side away from the maxillary anterior teeth basically matches that of the anterior teeth region.

7. The shell-shaped orthodontic appliance according to claim 1, characterized in that, In the sagittal section, the width of the first reinforcing part in the mesiodistal direction is 2-5 mm.

8. The shell-shaped orthodontic appliance according to claim 1, characterized in that, The height difference of the accommodating space in the sagittal section along the long axis of the tooth is 1 / 4 to 1 / 2 of the length of the crown of the mandibular anterior tooth along the long axis.

9. The shell-shaped orthodontic appliance according to any one of claims 1-7, characterized in that, The elastic modulus of the first reinforcing part is greater than that of the shell-shaped body.

10. The shell-shaped orthodontic appliance according to any one of claims 1-7, characterized in that, The hardness of the first reinforcing part is greater than the hardness of the shell-shaped body.

11. The shell-shaped orthodontic appliance according to claim 10, characterized in that, The Shore hardness of the first reinforcing part is 65D-80D, and the Shore hardness of the shell-shaped body is 50D-75D.

12. The shell-shaped orthodontic appliance according to any one of claims 1-7, characterized in that, The first reinforcing part is a multi-layer structure, which includes a base layer and a reinforcing layer, wherein at least one reinforcing layer at least partially covers the base layer.

13. The shell-shaped orthodontic appliance according to claim 12, characterized in that, The overall thickness of the first reinforcing section formed by the multi-layer structure is greater than the thickness of the shell-shaped body.

14. The shell-shaped orthodontic appliance according to claim 12, characterized in that, The elastic modulus of the reinforcing layer is greater than that of the base layer.

15. The shell-shaped orthodontic appliance according to any one of claims 1-7, characterized in that, The thickness of the first reinforcing part is 0.7-2.0 mm, and the thickness of the shell-shaped body is 0.5-1.0 mm.

16. The shell-shaped orthodontic appliance according to any one of claims 1-7, characterized in that, The first reinforcing part, the accommodating space, and the shell-shaped body are integrally formed.

17. The shell-shaped orthodontic appliance according to claim 1, characterized in that, A second reinforcing part is provided at one end of the first reinforcing part extending in the distal direction, and the first reinforcing part and the second reinforcing part together form a receiving space. The first reinforcing part and the second reinforcing part are arranged at a second included angle β, and 90°≤β<180°.

18. The shell-shaped orthodontic appliance according to claim 17, characterized in that, The containment space houses a reinforcing block.

19. The shell-shaped orthodontic appliance according to claim 18, characterized in that, The second reinforcing part is provided with a male and female structure that cooperates with the reinforcing block.

20. The shell-shaped orthodontic appliance according to claim 19, characterized in that, The second reinforcing part is provided with a protruding bubble protruding in the distal direction, and the contact area between the reinforcing block and the second reinforcing part is also provided with a protrusion that cooperates with the protruding bubble at the location corresponding to the protruding bubble.

21. The shell-shaped orthodontic appliance according to claim 1, characterized in that, The sidewalls of the accommodating space include a mesial accommodating sidewall and a distal accommodating sidewall. The mesial accommodating sidewall is at least partially connected to the lingual side of the anterior tooth region of the shell-shaped body on the side adjacent to the maxillary incisal edge. The side of the mesial accommodating sidewall away from the maxillary incisal edge is at least partially connected to one end of the distal accommodating sidewall. The other end of the distal accommodating sidewall is at least partially connected to the first reinforcing portion.

22. The shell-shaped orthodontic appliance according to claim 21, characterized in that, The distal accommodating sidewall has a guiding surface that guides the mandible to slide into the accommodating space.

23. The shell-shaped orthodontic appliance according to claim 22, characterized in that, The guiding surface is a guiding plane, a guiding curved surface, or a combination of a guiding plane and a guiding curved surface.

24. The shell-shaped orthodontic appliance according to claim 23, characterized in that, When the distal receiving sidewall is a guiding plane or partially a guiding plane, the third included angle γ formed between the distal receiving sidewall and the jaw plane in the sagittal section is 30°≤γ≤80°.

25. The shell-shaped orthodontic appliance according to claim 21, characterized in that, The mesial receiving sidewall is provided with a stabilizing surface, which has an inclination angle that enables the mandible to stably bite within the receiving space.

26. The shell-shaped orthodontic appliance according to claim 25, characterized in that, The stable surface is a stable plane, a stable curved surface, or a combination of a stable plane and a stable curved surface.

27. The shell-shaped orthodontic appliance according to claim 26, characterized in that, When the distal receiving sidewall is a stable plane or partially a stable plane, the fourth included angle δ formed between the mesial receiving sidewall and the jaw plane in the sagittal section is 30°≤δ≤80°.

28. The shell-shaped orthodontic appliance according to claim 1, characterized in that, The shell-like body has a geometric structure that allows the maxillary teeth to be gradually repositioned from their initial position to the target orthodontic position.

29. A dental orthodontic system, characterized in that, It includes a plurality of shell-shaped orthodontic appliances, wherein at least one of the plurality of shell-shaped orthodontic appliances is a shell-shaped orthodontic appliance as described in any one of claims 1-28.

30. A set of orthodontic appliances, comprising an upper jaw appliance and a lower jaw appliance, characterized in that, The maxillary orthodontic appliance is a shell-shaped orthodontic appliance as described in any one of claims 1-28, and the mandibular orthodontic appliance includes a mandibular shell-shaped body for enclosing the mandibular teeth.

31. A dental orthodontic system, characterized in that, The device includes multiple sets of orthodontic treatment kits, including at least one set as described in claim 30. The multiple sets of orthodontic treatment kits have a geometry that adjusts the position of the mandibular anterior teeth relative to the maxilla in the sagittal direction to the target occlusal position while gradually repositioning the teeth from their initial position to the target position.

32. A design method for a shell-shaped orthodontic appliance, characterized in that, include: Obtaining a digital dental model: Obtaining a digital dental model, wherein the digital dental model includes a digital tooth model body; Design of a shell-shaped orthodontic appliance: Based on a digital dental model, a shell-shaped orthodontic appliance as described in any one of claims 1-29 is designed. The designed shell-shaped orthodontic appliance includes a shell-shaped body designed based on the digital dental model and a sagittal adjustment part at least partially connected to the lingual side of the shell-shaped body. The sagittal adjustment part is designed to have a geometric structure that, while stabilizing the maxillary and mandibular occlusal relationship and reducing the occlusal deformation caused by the shell-shaped body, adjusts the position of the mandibular anterior teeth relative to the maxilla in the sagittal direction to the target occlusal position. The sagittal adjustment part includes a sidewall extending and bending from the lingual side of the anterior teeth of the shell-shaped body to form an accommodating space and a first reinforcing part that at least partially offsets the deformation of the shell-shaped body caused by occlusion. The accommodating space at least accommodates the incisal edge or a portion of the adjacent incisal edge of the mandibular anterior teeth, and one end of the first reinforcing part is connected to the end of the sidewall away from the shell-shaped body.

33. A method for preparing a shell-shaped orthodontic appliance, characterized in that, The designed orthodontic appliance is prepared according to the design method described in claim 32. The preparation method includes: a preparation method of hot pressing followed by cutting or a direct 3D printing method.

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