Dental instrument for occlusal adjustment, generation method and tooth correction system

Abstract

The embodiment of the invention provides a dental instrument for occlusion adjustment, a generation method and a tooth correction system.The dental instrument comprises a first shell-shaped body for containing maxillary teeth and a second shell-shaped body for containing mandibular teeth, an adjusting part for adjusting the vertical occlusion relation of anterior teeth of the upper jaw and the lower jaw is arranged on the tongue side of the anterior tooth area of the first shell-shaped body, and at least part of the adjusting part is connected to the tongue side of the anterior tooth area of the first shell-shaped body. And the surface, adjacent to the jaw teeth, of the adjusting part applies a pressing force to the area, corresponding to the anterior tooth area teeth of the lower jaw, of the second shell-shaped body, so that the tooth accommodating cavity, accommodating the posterior tooth area teeth, of the second shell-shaped body drives the posterior tooth area teeth to move towards the jaw direction. According to the dental instrument, the upper jaw shell-shaped body and the lower jaw shell-shaped body which have different functions and have a synergistic effect are designed, so that correction of a deep overjaw and leveling of a Spee curve are synchronously completed, the correction effect is improved, and the correction period is shortened.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of oral orthodontics, and in particular to a dental instrument, a generation method and a dental correction system for occlusal adjustment. Background Art

[0002] Bad oral habits are one of the most common causes of malocclusion. According to statistics from Peking University Medical School, it accounts for about 1 / 4 of the causes of all types of malocclusion. Deep overbite is a malocclusion caused by abnormal vertical development of the maxillary and mandibular dental arches and / or maxillary and mandibular bones. It manifests as the incisor of the upper front teeth covering more than one-third of the labial length of the lower front teeth crown, or the incisor of the lower front teeth occluding more than one-third of the lingual side of the upper front teeth crown, making it easy for patients to bite their gums, leading to periodontitis of the anterior teeth and facial joint diseases. For most malocclusion patients, correction of deep overbite may be the first step in the entire dental treatment process, and opening the bite is the key to correcting deep overbite.

[0003] The existing technology usually uses maxillary removable appliances to keep the height of the anterior alveolar bone unchanged, focusing on raising the height of the posterior teeth, adjusting the jaw pads one by one from the last tooth, so that each pair of teeth can be extended and contacted, and after the posterior teeth are raised, the lingual misalignment of the anterior teeth and the distalization of the posterior teeth are corrected. There is also a method of setting a flat guide on the lingual side of the maxillary anterior teeth area, but this method requires the flat guide made of metal and resin to be fixed on the maxilla, which not only causes some teeth to be suspended after wearing, but also has a certain impact on the patient's chewing, and the patient has a strong foreign body sensation. In the prior art, there is also a method of using invisible shell-shaped appliances to add a flat guide structure to correct deep overbite. However, both the maxillary removable appliance and the invisible shell-shaped appliance are fixed to the maxillary anterior teeth through the flat guide structure, so as to use the flat guide structure to lower the mandibular anterior teeth. However, most cases of deep overbite often have the problem of too steep mandibular Spee curve. Simply lowering the mandibular anterior teeth through the flat guide structure cannot achieve the flattening of the Spee curve. In this case, other correction devices are needed to lift and move the teeth in the mandibular posterior area to complete the flattening of the Spee curve. This will require additional correction steps, increase the correction cycle and reduce the correction efficiency.

[0004] Therefore, it is of great significance to study a corrective device that can simultaneously correct deep overbite and complete the leveling of the Spee curve. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a dental instrument, a generation method and a dental correction system for occlusal adjustment, by designing a maxillary shell-like body and a mandibular shell-like body with different functions and cooperating with each other, thereby simultaneously completing the correction of deep overbite and leveling of Spee curve, improving the correction effect and shortening the correction cycle.

[0006] To achieve the above-mentioned objectives, an embodiment of the present application provides a dental device for occlusal adjustment, comprising a first shell-like body for accommodating maxillary teeth and a second shell-like body for accommodating mandibular teeth, the lingual side of the anterior teeth area of ​​the first shell-like body being provided with an adjustment portion for adjusting the vertical occlusal relationship between the upper and lower anterior teeth, the adjustment portion being at least partially connected to the lingual side of the anterior teeth area of ​​the first shell-like body, and when worn, the surface of the adjustment portion adjacent to the opposing teeth applies a depressing force to the area of ​​the second shell-like body corresponding to the teeth in the anterior teeth area of ​​the mandible so that the tooth receiving cavity of the second shell body for accommodating the teeth in the posterior teeth area drives the teeth in the posterior teeth area to move toward the opposite jaw.

[0007] Preferably, the tooth receiving cavity of the second shell-shaped body for accommodating the teeth in the posterior region has a geometric structure capable of wrapping the movement of the teeth.

[0008] Preferably, the tooth receiving cavity of the second shell-like body corresponding to the raised teeth in the posterior tooth area has a force application point formed concave inwardly toward the tooth near the gingival end.

[0009] Preferably, it also includes a raised attachment provided on the buccal and / or lingual sides of the teeth in the posterior region, wherein the length of the raised attachment in the mesiodistal direction is 1 / 2-2 / 3 of the length of the corresponding tooth in the mesiodistal direction.

[0010] Preferably, the second shell-like body has a raised accommodating cavity consistent with the contour of the raised attachment at the position corresponding to the raised position. When worn, the raised attachment interacts with the raised accommodating cavity so that the teeth provided with the raised attachment are subjected to a raised force.

[0011] Preferably, a traction structure for hanging a traction member is provided on the buccal side of the tooth receiving cavity of the second shell-like body accommodating the posterior teeth. The traction structure is pulled by the traction member and applies an auxiliary lifting force to the teeth wrapped in the tooth receiving cavity of the posterior teeth.

[0012] Preferably, the traction structure is formed by extending the buccal side of the tooth receiving cavity of the second shell-shaped body that accommodates the teeth in the posterior region toward the gingival end.

[0013] Preferably, the traction structure is not connected to the corresponding tooth receiving cavity in the mesiodistal direction.

[0014] Preferably, the traction structure has a gap with another portion of the tooth receiving cavity surface in the mesiodistal direction.

[0015] Preferably, the second shell-shaped body has a geometric structure that allows it to accommodate the teeth in the anterior region to gradually move from a first position to a second position.

[0016] Preferably, the second shell-shaped body is used for accommodating a tooth receiving cavity of the front teeth to apply a depressing force to the teeth wrapped therein.

[0017] Preferably, the height of the tooth receiving cavity of the second shell-like body for accommodating the teeth in the anterior region in the vertical direction is smaller than the height of the tooth crowns thereof for accommodating the teeth in the vertical direction.

[0018] Preferably, the height difference between the tooth receiving cavity of the second shell-shaped body for accommodating the teeth in the anterior region and the crown of the tooth accommodated therein in the vertical direction is between 0.1 mm and 0.2 mm.

[0019] Preferably, a depression attachment is provided on the surface of the canine or molar adjacent to the anterior teeth, and when worn, the depression attachment applies a vertical downward force to the second shell-like body so that the second shell-like body applies a depression force to the anterior teeth.

[0020] Preferably, the surface of the depression attachment adjacent to the gingival end is a concave curved surface that is recessed toward the opposite jaw.

[0021] Preferably, the second shell-like body has a depression accommodating cavity having the same contour as the depression accessory at a position corresponding to the depression accessory.

[0022] Preferably, when worn, the concave curved surface applies a vertical downward force to the depressed accommodating cavity.

[0023] Preferably, the adjustment portion comprises a cavity structure formed by the lingual side surface of the front teeth area of ​​the first shell-like body extending first toward the opposite jaw direction and then toward the posterior teeth direction.

[0024] Preferably, the surface of the cavity structure adjacent to the opposing jaw is a plane parallel to the occlusal surface.

[0025] Preferably, the plane has a bite mark structure for locating the position of the mandible, and the bite mark structure has the same shape as the teeth in the anterior area of ​​the opposing jaw.

[0026] Preferably, the surface of the cavity structure adjacent to the opposing jaw is an inclined surface for guiding the mandible to move forward.

[0027] Preferably, the mechanical strength of the adjustment portion is greater than the mechanical strength of the first shell-like body.

[0028] Preferably, the adjustment portion further includes a filling piece located in the cavity structure.

[0029] Preferably, the lingual end of the cavity structure adjacent to the jaw surface extends toward the palate to form a reinforcement portion for resisting deformation of the cavity structure caused by occlusion.

[0030] Preferably, when worn, at least part of the reinforcement portion fits the upper palate and is consistent with the curvature of the upper palate.

[0031] The embodiment of the present application also provides a method for generating a dental instrument, comprising:

[0032] Obtain the initial SPEE curve depth of the current patient's dentition, and obtain the target SPEE curve depth at the correction target position according to the correction plan;

[0033] Determine the first digital dental model and the second digital dental model corresponding to the first shell-shaped body and the second shell-shaped body; wherein the first digital dental model is provided with an adjustment part for adjusting the vertical occlusal relationship of the upper and lower anterior teeth on the lingual side of the anterior teeth area, and the adjustment part is at least partially connected to the lingual side of the anterior teeth area of ​​the first digital dental model; design the tooth elevation amount of the posterior teeth area of ​​the second digital dental model according to the SPEE curve depth and the target SPEE curve depth;

[0034] Manufacturing the dental instrument: manufacturing a first shell-shaped body and a second shell-shaped body according to the first digital jaw model and the second digital jaw model respectively.

[0035] The method for generating a dental instrument according to claim 25 is characterized in that the manufacturing of the dental instrument includes: manufacturing a solid model of the first digital dental model and the second digital dental model by additive manufacturing, and manufacturing the first shell-shaped body and the second shell-shaped body by hot pressing film according to the solid model.

[0036] Preferably, the manufacturing of the dental instrument includes: generating a digital model of the first shell-like body and a digital model of the second shell-like body according to the first digital jaw model and the second digital jaw model, and manufacturing the first shell-like body and the second shell-like body by additive manufacturing according to the digital model of the first shell-like body and the digital model of the second shell-like body.

[0037] An embodiment of the present application also provides a dental correction system, comprising M dental instruments as described in any of the above, wherein the M dental instruments are designed to gradually flatten the mandibular SPEE curve in a step-by-step manner, wherein the second shell-shaped body in the M dental instruments is used to achieve the step-by-step depression movement of the teeth in the mandibular anterior region in the correction plan and is simultaneously used to achieve the step-by-step elevation movement of the teeth in the mandibular posterior region in the correction plan, and M is a natural number greater than or equal to 2.

[0038] Preferably, the M dental instruments cause at least part of the teeth in the mandibular anterior region to be depressed by 1 / 3-1 / 2 of the total movement required to flatten the mandibular SPEE curve.

[0039] Preferably, the single-step depression amount of a dental instrument for occlusal adjustment on at least part of the teeth in the mandibular anterior region is between 0.1 mm and 0.2 mm.

[0040] Preferably, the M dental instruments raise at least part of the teeth in the mandibular posterior region by 1 / 2-2 / 3 of the total movement required to flatten the mandibular SPEE curve.

[0041] Preferably, the single-step elevation amount of a dental instrument for occlusal adjustment for at least a portion of the teeth in the mandibular posterior region is between 0.1 mm and 0.2 mm.

[0042] Preferably, the relative position relationship between each adjustment portion in the M dental instruments and its corresponding first shell-shaped body is consistent.

[0043] Preferably, as the correction process progresses, each adjustment portion of the M dental instruments gradually approaches the upper palate at the lowest point in the vertical direction.

[0044] The dental device, production method and dental correction system for occlusal adjustment provided by the present invention have at least the following beneficial effects compared with the prior art:

[0045] The dental device for occlusal adjustment disclosed in the present application comprises a first shell-like body for accommodating the upper jaw and a second shell-like body for accommodating the lower jaw. The adjustment portion of the first shell-like body can not only open the occlusion to provide space for the movement of the posterior teeth of the lower jaw, but also utilize the special structural design of the second shell-like body with a seesaw structure to simultaneously raise the posterior teeth of the lower jaw while lowering the anterior teeth of the lower jaw, and the lower jaw can be corrected at the same time. For patients with a deep mandibular spee curve, the lower anterior teeth can be lowered and the posterior teeth can be raised at the same time to level the spee curve, thereby simultaneously completing the correction of deep overbite and leveling of the Spee curve, improving the correction effect and shortening the correction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0047] Figure 1 is a schematic diagram of wearing a dental appliance for occlusal adjustment in some embodiments of the present application;

[0048] Figure 2 is a schematic diagram of the structure of a dental instrument used for occlusal adjustment in some embodiments of the present application;

[0049] Figure 3is a schematic structural diagram of the second shell-shaped body in some embodiments of the present application;

[0050] Figure 4 is a schematic diagram of the structure of the elevated attachment in some embodiments of the present application;

[0051] Figure 5 is a schematic diagram of the structure of the elevated attachment in some embodiments of the present application;

[0052] Figure 6 is a schematic structural diagram of the second shell-shaped body in some embodiments of the present application;

[0053] Figure 7 yes Figure 6 A magnified view of the part A in the middle;

[0054] Figure 8 is a schematic structural diagram of the second shell-shaped body in some embodiments of the present application;

[0055] Fig. 9 is a schematic structural diagram of the second shell-shaped body in some other embodiments of the present application;

[0056] Fig.10 is a schematic structural diagram of the second shell-shaped body in some other embodiments of the present application;

[0057] Fig.11 is a schematic structural diagram of the first shell-shaped body in some embodiments of the present application;

[0058] Fig.12 is a schematic structural diagram of the first shell-shaped body in some other embodiments of the present application;

[0059] Fig.13 is a schematic structural diagram of the first shell-shaped body in some other embodiments of the present application;

[0060] Fig.14 is a schematic structural diagram of the first shell-shaped body in some other embodiments of the present application;

[0061] Fig.15 is a schematic structural diagram of the first shell-shaped body in some other embodiments of the present application;

[0062] Fig.16 is a flow chart of a method for generating a dental appliance for occlusal adjustment in some embodiments of the present application;

[0063] Fig.17 is a schematic diagram of the structure of a graphics processor provided by one embodiment of the present application;

[0064] Fig.18 It is a schematic diagram of the structure of a series of dental instruments in other embodiments of the present application. DETAILED DESCRIPTION

[0065] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in each embodiment of the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not constitute any limitation, and the various embodiments can be combined with each other and referenced to each other without contradiction.

[0066] The "posterior tooth area" mentioned in each embodiment of the present application is defined according to the classification of teeth in the second edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 36-38, including premolars and molars, which are displayed as teeth 4-8 by the FDI marking method, and the teeth 1-3 in the anterior tooth area by the FDI marking method. The teeth in the anterior tooth area include central incisors, lateral incisors, and canines. In addition, for the teeth in the deciduous tooth stage, the "posterior tooth area" is defined according to the classification of deciduous teeth in the second edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 40-41, including three categories: deciduous incisors, deciduous canines, and deciduous molars, among which deciduous incisors include deciduous central teeth and deciduous lateral incisors, and deciduous molars include first deciduous molars and second deciduous molars.

[0067] The shell-like body is provided with a number of cavities for accommodating multiple teeth, and is divided into lingual surface, labial surface, mesial surface and distal surface. Among them, "lingual surface" is named according to the names of various surfaces of the crown in the 2nd edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 35-36, where the labial surface and buccal surface are the sides of the crown of the front teeth close to the lips, and the sides of the crown of the back teeth close to the cheek are called buccal surfaces. The lingual surface is the side of the crown of the front teeth and the back teeth close to the tongue, collectively referred to as the lingual surface. The mesial surface and the distal surface are the two surfaces adjacent to the crown of the adjacent teeth, collectively referred to as the adjacent surfaces. The side closer to the midline of the face is called the mesial surface, and the side farther from the midline of the face is called the distal surface.

[0068] refer to Figure 1 and Figure 2As shown, an embodiment of the present application provides a dental device for occlusal adjustment, including a first shell-like body 11 for accommodating maxillary teeth and a second shell-like body 12 for accommodating mandibular teeth. The lingual side of the anterior teeth area of ​​the first shell-like body 11 is provided with an adjustment portion 111 for adjusting the vertical occlusal relationship between the upper and lower anterior teeth. The adjustment portion 111 is at least partially connected to the lingual side of the anterior teeth area of ​​the first shell-like body 11. When worn, the adjustment portion 111 can adjust the vertical occlusal relationship between the upper and lower teeth to open the occlusion of the posterior teeth, and the surface of the adjustment portion 111 adjacent to the teeth in the opposing jaw applies a depressing force F1 to the area of ​​the second shell-like body 12 corresponding to the teeth in the anterior teeth area of ​​the mandibular teeth so that the tooth receiving cavity of the second shell-like body 12 accommodating the teeth in the posterior teeth area applies a force F2 in the opposite direction to F1 to the wrapped teeth, thereby driving the wrapped teeth to move toward the opposite jaw. In addition, the occlusal opening height can be adjusted by adjusting the distance between the adjustment portion 111 and the incisal end of the teeth in the anterior teeth area of ​​the first shell-like body 11, and the magnitude of the depressing force and the lifting force can be further adjusted.

[0069] In some embodiments, the tooth receiving cavity of the second shell-shaped body 12 for accommodating the teeth in the posterior region has a geometric structure that allows the teeth to move. Specifically, the overall size of the inner surface of the tooth receiving cavity of the second shell-shaped body 12 for accommodating the teeth in the posterior region is smaller than the teeth that need to be accommodated, so that when the tooth receiving cavity in the posterior region is subjected to the seesaw effect, the teeth can be driven to move upward together. Or, in some embodiments, refer to Figure 3 As shown, the structural improvement of the tooth receiving cavity of the second shell-shaped body 12 is that the tooth receiving cavity of the second shell-shaped body 12 corresponding to the raised teeth in the posterior tooth area has a force application point 121 formed concave in the direction of the teeth near the gingival end. The force application point 121 is designed near the gingival end to avoid the undesirable torque that occurs when the tooth incisal end is subjected to force.

[0070] In some embodiments, it also includes a lifting attachment 14 provided on the buccal and / or lingual side of the teeth in the posterior teeth area, and the length of the lifting attachment 14 in the mesiodistal direction is 1 / 2-2 / 3 of the length of the corresponding tooth in the mesiodistal direction. The second shell-shaped body 12 has a lifting accommodating cavity 124 that is consistent with the contour of the lifting attachment 14 at the position corresponding to the lifting. When worn, the lifting attachment 14 interacts with the lifting accommodating cavity 124 so that the tooth provided with the lifting attachment 14 is subjected to a lifting force, thereby achieving the application of a lifting force to the tooth with the lifting attachment 14 attached. Figure 4As shown, the lifting attachment 14 can be a rectangular attachment bonded to the buccal side of the tooth that needs to be lifted. The bottom surface of the rectangular attachment adjacent to the gingival end interacts with the second shell body 12, that is, when the second shell body 12 is worn, the bottom surface of the rectangular attachment adjacent to the gingival end is misaligned with the lifting accommodation cavity 124 of the second shell body 12, and the lifting accommodation cavity 124 of the second shell body 12 undergoes elastic deformation, thereby driving the tooth to move upward. Figure 5 As shown, the lifting attachment 14 can be a triangular-shaped attachment bonded to the buccal and lingual sides of the teeth that need to be lifted. Similarly, the bottom surface of the triangular-shaped attachment adjacent to the gingival end interacts with the second shell-shaped body 12, that is, when the second shell-shaped body 12 is worn, the bottom surface of the triangular-shaped attachment adjacent to the gingival end is misaligned with the lifting accommodation cavity 124 of the second shell-shaped body 12, and the lifting accommodation cavity 124 of the second shell-shaped body 12 undergoes elastic deformation to drive the teeth to move upward. The triangular-shaped attachment is arranged on the buccal and lingual sides at the same time, which can drive the teeth to lift more, and the triangular-shaped attachment has a weaker foreign body sensation in the oral cavity than the rectangular attachment.

[0071] In some embodiments, reference Figure 6 and Figure 7 As shown, in order for the second shell-like body 12 to accommodate the buccal side of the tooth receiving cavity of the posterior teeth, a traction structure 15 for hanging a traction member is provided. The traction structure 15 is pulled by the traction member and applies an auxiliary lifting force to the teeth wrapped in the tooth receiving cavity of the posterior teeth. The traction structure 15 is formed by extending the buccal side of the tooth receiving cavity of the posterior teeth of the second shell-like body 12 toward the gingival end. The traction structure 15 is not connected to the corresponding tooth receiving cavity in the mesiodistal direction. The traction structure 15 has a gap 15a between it and another part of the surface of the corresponding tooth receiving cavity in the mesiodistal direction.

[0072] In some embodiments, the second shell-like body has a geometric structure that allows it to accommodate the teeth in the front teeth area to gradually move from a first position to a second position. The second shell-like body 12 achieves the movement of the teeth through elastic deformation after being worn on the teeth. In various embodiments of the present application, the first shell-like body and the second shell-like body can be made of the same material and thickness. However, different materials or different thicknesses can also be used according to the needs of the correction plan. For example, when a greater correction force is required to obtain a greater amount of movement, a material with a larger elastic modulus / rigidity or a material with a larger thickness can be used.

[0073] In some embodiments, reference Figure 8As shown, the height of the tooth receiving cavity of the second shell-like body 12 for accommodating at least part of the teeth in the anterior teeth area in the vertical direction is less than the height of the crown of the tooth to be accommodated in the vertical direction. That is, the height of the tooth receiving cavity corresponding to the teeth in the anterior teeth area that need to be depressed in the vertical direction is less than the height of the crown of the tooth to be depressed in the vertical direction. Specifically, the overall height Y1 of the tooth receiving cavity in the vertical direction is less than the height Y2 of the crown of the tooth to be depressed, and the height difference between the tooth receiving cavity of the second shell-like body 12 for accommodating at least part of the teeth in the anterior teeth area and the crown of the tooth to be accommodated in the vertical direction is between 0.1mm-0.2mm. The advantage of this design is that when the second shell-like body 12 is worn on the patient's mandibular dentition, after the teeth in the posterior teeth area and the tooth receiving cavity of the posterior teeth area of ​​the second shell-like body 12 are completely in place, the tooth receiving cavity corresponding to the part of the anterior teeth that need to be depressed applies a downward depression force to the incisal end of the anterior teeth that need to be depressed, so that during the wearing process of the second shell-like body 12, part of the teeth in the anterior teeth area are always subjected to a downward depression force.

[0074] In another embodiment, the local height of the tooth receiving cavity corresponding to the tooth to be depressed in the anterior tooth area of ​​the second shell-shaped body 12 in the vertical direction is less than the height of the corresponding part of the crown of the depressed tooth, Fig. 9 As shown, specifically, the local height reduction can be formed by the incisal end of the corresponding tooth receiving cavity being partially concave downward (ie, concave toward the gingival side). The range H1 of the local height reduction is between 0.1 mm and 0.2 mm.

[0075] In other embodiments, the dental device further comprises a depression attachment 13 provided on the surface of the canine or molar adjacent to the anterior teeth. When worn, the depression attachment 13 applies a vertical downward force to the second shell body 12 so that the second shell body 12 applies a depression force to at least a portion of the anterior teeth. Specifically, referring to Fig.10 The second shell-like body 12 of the example, when the second shell-like body 12 needs to depress all the front teeth, that is, when the central incisor, lateral incisor and canine need to be depressed, a depressing attachment 13 is bonded to the labial surface of the premolars on both sides of the mandible, and the surface of the depressing attachment 13 adjacent to the gingival end is a concave curved surface 13a formed by being concave toward the opposite jaw. The second shell-like body 12 has a depressing accommodating cavity 123 consistent with the contour of the depressing attachment 13 at the position corresponding to the depressing attachment 13. When worn, the concave curved surface 13a applies a vertical downward force to the depressing accommodating cavity 123. The second shell-like body 12 applies a downward force to the central incisor, lateral incisor and canine, thereby achieving the depressing of the central incisor, lateral incisor and canine.

[0076] In other embodiments, similarly, if the teeth in the anterior region that need to be depressed are the central incisors and the lateral incisors, then depression attachments 13 are bonded to the labial surfaces of the canines on both sides. Fig.10 The same as the example in, the surface of the depression attachment 13 adjacent to the gingival end is a concave curved surface 13a formed by being concave toward the jaw. The second shell-like body 12 has a depression accommodating cavity having the same contour as the depression attachment 13 at the position corresponding to the depression attachment 13. When worn, the concave curved surface applies a vertical downward force to the depression accommodating cavity. The second shell-like body 12 applies the downward force to the central incisor and the lateral incisor, thereby achieving depression of the central incisor and the lateral incisor.

[0077] In some embodiments of the present application, reference Fig.11 As shown, the adjustment portion 111 includes a cavity structure 111a formed by the lingual side surface of the anterior teeth area of ​​the first shell-like body 11 extending first toward the jaw direction and then toward the posterior teeth direction. Specifically, the adjustment portion 111 includes a side wall extending and bending from the lingual side of the anterior teeth area of ​​the first shell-like body 11 to form a cavity structure 111a, and the cavity structure 111a at least accommodates a part of the incisal edge or adjacent incisal edge of the teeth in the anterior teeth area of ​​the mandible; and includes a reinforcement portion 113 that at least partially offsets the deformation of the shell-like body caused by occlusion, and one end of the reinforcement portion 113 is connected to an end of the side wall away from the first shell-like body 11. More specifically, one end of the lingual side of the anterior teeth region of the first shell-like body 11 is bent and extended toward a side away from the teeth of the maxillary anterior teeth region, and the side wall of the cavity structure 111a formed by the bent extension can be a smoothly transitioned curved surface or an extended surface surrounded by polygons. That is to say, the side of the cavity structure 111a adjacent to the teeth of the maxillary anterior teeth region is connected to the lingual side of the anterior teeth region of the first shell-like body 11, and the side of the cavity structure 111a away from the teeth of the maxillary anterior teeth region is connected to the reinforcement part 113. Among them, the specific position of the connection between the cavity structure 111a and the lingual side of the anterior teeth area of ​​the first shell-like body 11 can be the lingual side of the anterior teeth area of ​​the first shell-like body 11 adjacent to the gingival margin or the lingual fossa of the first shell-like body 11 that accommodates the teeth in the anterior teeth area. Specifically, the connection can be from the lingual gingival margin of the anterior teeth area of ​​the first shell-like body in the maxilla to 1 / 4-1 / 2 of the length of the crown of the anterior teeth area as the starting point, that is, the connection is not the lingual gingival margin of the anterior teeth area of ​​the shell-like body, but from the lingual side of the anterior teeth area of ​​the first shell-like body 11 adjacent to the gingival margin or the lingual fossa of the first shell-like body 11 that accommodates the teeth in the anterior teeth area as the extension starting point, extending away from the side of the teeth in the anterior teeth area of ​​the maxilla. The reinforcement part 113 is formed by the lingual end of the cavity structure 111a adjacent to the surface of the opposite jaw extending toward the palate. The reinforcement part 113 can partially or completely fit the upper palate area of ​​the patient and be consistent with the curvature of the upper palate, thereby offsetting the deformation of the adjustment part 111 during wearing. Alternatively, refer to Fig.12As shown, the reinforcement portion 113 is a convex point structure formed by the surface of the distal end of the cavity structure 111a protruding in a direction away from the maxillary anterior teeth, thereby increasing the deformation resistance of the cavity structure 111a in the vertical direction.

[0078] The cavity structure 111a at least accommodates the incisal edge of the teeth in the anterior region of the mandible or a part of the adjacent incisal edge. More specifically, "overbite" refers to the vertical distance that the maxillary teeth cover the mandibular teeth, which is generally 1-3mm. In the anterior teeth, if the covered portion does not exceed the incisal 1 / 3 of the labial surface of the incisor, it is considered a normal overbite. If it exceeds, it is considered a deep overbite. The degree depends on the position of the incisal edge of the mandibular incisor biting on the lingual surface of the maxillary incisor. If it bites in the incisal 1 / 3, it is a normal overbite; if it bites within the middle 1 / 3, it is called a degree I deep overbite; if it bites within the cervical 1 / 3, it is called a degree II deep overbite; if it bites above the cervical 1 / 3, it is called a degree III deep overbite. The cavity structure 111a accommodates the incisal edge or a part of the adjacent incisal edge of the teeth in the mandibular anterior teeth area, 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 part of the adjacent incisal edge is the adjacent 1 / 3 of the labial surface of the mandibular anterior teeth, such as between 1 / 4-1 / 3 or between 1 / 3-1 / 2, and the more preferred way is between 1 / 4-1 / 3. At this time, the vertical distance that the maxillary teeth cover the mandibular teeth does not exceed the incisal 1 / 3 of the labial surface of the mandibular incisor.

[0079] In some embodiments, the adjustment portion 111 includes a cavity structure 111a formed by a lingual side surface of at least one tooth receiving cavity in the anterior tooth region of the first shell-shaped body 11 partially protruding toward the distal direction; Fig.13 As shown, the first shell-like body 11 has a plurality of cavity structures 111a extending from the local lingual side of the tooth receiving cavity to the distal direction, and the cavity structure 111a is connected to the tooth receiving cavity. The advantage of such a design is that the adjustment portion 111 and the first shell-like body 11 are integrally formed, which is suitable for large-scale production and manufacturing. In addition, the design of the adjustment portion 111 does not affect the wrapping property of the tooth receiving cavity on the teeth too much.

[0080] In some embodiments, reference Fig.14 In the schematic cross-sectional view of the first shell-like body 11 along the sagittal plane, the surface of the cavity structure 111a adjacent to the opposing jaw is a plane parallel to the occlusal plane. Specifically, the surface of the cavity structure 111a adjacent to the opposing jaw is a plane as a whole, or there is a bite mark structure 111b on the surface for positioning the mandibular position, and the bite mark structure 111b has the same shape as the teeth in the anterior teeth area of ​​the opposing jaw. The advantage of this design is that the mandibular position can be better positioned through the bite mark structure 111b, and the sagittal upward movement of the mandibular can also be guided to solve some cases of deep overbite or crossbite.

[0081] Alternatively, in other embodiments, reference Fig.15The schematic cross-sectional view of the first shell-like body 11 along the sagittal plane shows that the surface of the cavity structure 111a adjacent to the opposing jaw is an inclined surface for guiding the mandible to move forward. The inclined surface can drive the mandibular teeth to move forward during the occlusion process, thereby guiding the mandible forward and correcting the deep overbite problem.

[0082] In some embodiments, the mechanical strength of the adjustment portion 111 is greater than the mechanical strength of the first shell-like body 11. Specifically, the adjustment portion 111 and the first shell-like body 11 are made of the same material, such as one of PETG, PC or TPU, or other polymer materials that can be used in the oral cavity and are safe for use as medical devices, so that the adjustment portion 111 and the first shell-like body 11 are respectively made of different single materials or different multi-layer composite materials. More specifically, when the adjustment portion 111 and the first shell-like body 11 are made of different single materials, they can be any combination of two of PETG, PC or TPU. In particular, different materials can be selected for the adjustment portion 111 and the first shell-like body 11 during design or preparation, such as the material of the first shell-like body 11 is TPU, and the material of the adjustment portion 111 can be PETG. At this time, the diaphragm prepared by hot pressing can be made of different materials in some parts, or different materials can be used for local areas during 3D direct printing. When the adjustment portion 111 is a multilayer composite material different from the first shell-like body 11, it can be a multilayer composite material composed of any combination of PETG, PC or TPU. The adjustment portion 111 can be a multilayer composite material, while the first shell-like body 11 is a single material; the adjustment portion 111 can also be a single material, while the first shell-like body 11 is a multilayer composite material; or both the adjustment portion 111 and the first shell-like body 11 are multilayer composite materials. More specifically, the adjustment portion 111 is a multilayer composite material different from the first shell-like body 11, such as the first shell-like body 11. The shell body 11 is a single-layer structure or a multi-layer composite structure, and the adjustment part 111 is a multi-layer composite material, wherein one layer of the multi-layer structure of the adjustment part 111 can be the same as the first shell body 11, or it can be different, such as the adjustment part 111 is composed of a double-layer composite material, specifically PETG and TPU, and the material of the first shell body 11 is PETG; or the adjustment part 111 is composed of a double-layer composite material, specifically PETG and TPU, and the first shell body 11 is composed of a double-layer composite material, specifically PETG and PC. The above list is only part of the preferred implementation methods, and various material combinations that can achieve the effects of the present invention are within the protection scope of the present invention and will not be repeated here.

[0083] In other embodiments, reference Fig.12The schematic cross-sectional view of the first shell-like body 11 along the sagittal plane, the adjustment part 111 also includes a filling piece located in the cavity structure 111a. The filling piece can be made of a glass resin material that meets the standards of oral medicine. When the dental device in this application is worn in the early stage of correction, the mandibular teeth of the patient will have a large bite force on the adjustment part 111, and the cavity structure 111a of the adjustment part 111 is likely to collapse and deform during use, thereby causing the dental device to lose its correction function and cannot be worn. Therefore, the filling piece in this application can solve the above problem well. The solid filling piece can effectively improve the anti-deformation ability of the cavity structure 111a, so that the dental device in the early stage of correction can obtain a more reliable and stable correction result.

[0084] The embodiment of the present application also provides a method for generating a dental instrument, such as Fig.16 As shown, including:

[0085] Step 101, obtaining the initial SPEE curve depth of the current patient's dentition, and obtaining the target SPEE curve depth at the correction target position according to the correction plan;

[0086] Step 102, determining the first digital dental model and the second digital dental model corresponding to the first shell-shaped body and the second shell-shaped body; wherein the first digital dental model is provided with an adjustment portion for adjusting the vertical occlusal relationship of the upper and lower anterior teeth on the lingual side of the anterior teeth area, and the adjustment portion is at least partially connected to the lingual side of the anterior teeth area of ​​the first digital dental model; the tooth elevation amount of the posterior teeth area of ​​the second digital dental model is designed according to the SPEE curve depth and the target SPEE curve depth;

[0087] Step 103, manufacturing the dental appliance: manufacturing a first shell-shaped body and a second shell-shaped body according to the first digital jaw model and the second digital jaw model respectively.

[0088] In some embodiments, manufacturing dental instruments includes: manufacturing a physical model corresponding to the digital dental models corresponding to the series of dental instruments by additive manufacturing, and manufacturing the series of dental instruments by hot pressing film according to the physical model. Additive manufacturing can also be called 3D printing, which integrates computer-aided design, material processing and molding technology, and is based on digital model files. It uses software and numerical control systems to stack special metal materials, non-metal materials and medical biomaterials layer by layer in accordance with extrusion, sintering, melting, light curing, spraying, etc. to manufacture physical objects.

[0089] In other embodiments, the manufacturing of the dental instruments includes: generating digital models of the series of dental instruments according to digital jaw models corresponding to the series of dental instruments, and manufacturing the series of dental instruments by additive manufacturing based on the digital models of the series of dental instruments.

[0090] It is worth mentioning that all modules involved in this embodiment are logic modules. In practical applications, a logic unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, this embodiment does not introduce units that are not closely related to solving the technical problem proposed by the present invention, but this does not mean that there are no other units in this embodiment.

[0091] One embodiment of the present invention relates to an electronic device, such as Fig.17 As shown, it includes at least one processor 401; and

[0092] A memory 402 is communicatively connected to the at least one processor 401; wherein,

[0093] The memory 402 stores instructions that can be executed by the at least one processor 401 . The instructions are executed by the at least one processor 401 so that the at least one processor 401 can perform a method for generating a shell-shaped dental appliance.

[0094] Among them, the memory and the processor are connected in a bus manner, and the bus may include any number of interconnected buses and bridges, and the bus connects various circuits of one or more processors and memories together. The bus can also connect various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. The data processed by the processor is transmitted on a wireless medium via an antenna, and further, the antenna also receives data and transmits the data to the processor.

[0095] The processor is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory can be used to store data used by the processor when performing operations.

[0096] One embodiment of the present invention relates to a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the above method embodiment is implemented.

[0097] That is, those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions for making a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0098] The embodiment of the present application provides another dental system for occlusal adjustment, referring to Fig.18 As shown, it includes M dental instruments for gradually implementing the correction plan in steps, and the multiple dental instruments are designed to gradually flatten the mandibular SPEE curve in a step-by-step manner. Each of the M dental instruments has a maxillary shell-like body for accommodating the maxillary dentition and a mandibular shell-like body for accommodating the mandibular dentition, the M maxillary shell-like bodies each have an adjustment portion for opening the occlusal height of the anterior teeth, and the M mandibular shell-like bodies have a geometric structure for applying a depression force to the mandibular teeth, wherein the M mandibular shell-like bodies are used to realize the depression movement of the teeth in the mandibular anterior teeth area in the correction plan in steps, and the M adjustment portions make the relative position relationship of the upper and lower mandibular teeth in the anterior teeth area in the vertical direction consistent or inconsistent during the correction process, and M is a natural number greater than or equal to 2. Specifically, the M dental devices that gradually implement the correction plan in steps include dental device 100, dental device 200 and dental device 300. The adjustment part 111 in the dental device 100, the adjustment part 211 in the dental device 200 and the adjustment part 311 in the dental device 300 ensure that the relative position relationship of the upper and lower teeth in the anterior area remains consistent during the wearing process, and the second shell 12, the second shell 22 and the second shell 32 correspond to the amount of depression of the anterior teeth in the corresponding correction stage in the correction step.

[0099] In some embodiments, when it is necessary to design step-by-step movement, the pressing force in each step needs to be controlled. In this application, the relative position relationship of the upper teeth of the adjustment part is adjusted to adjust the movement amount applied by the adjustment part to the teeth of the opposing jaw. In other words, as the correction process progresses, each adjustment part of the multiple dental instruments for occlusal adjustment gradually approaches the upper palate at the lowest point in the vertical direction. This design can not only adjust the movement amount of each step, but also keep the vertical relationship between the upper and lower jaws in the correct position after the correction is completed.

[0100] In cases of deep overbite, the mandibular dentition of the patient is often accompanied by a deep SPEE curve. Generally speaking, for patients with a deep SPEE, the anterior teeth area of ​​the mandibular dentition needs to be depressed and the teeth in the posterior area need to be elevated, that is, the mandibular SPEE curve needs to be leveled. Especially for patients with low-angle horizontal growth, the facial shape can be improved by increasing the inter-mandibular height of the posterior area by elongating the posterior teeth. Therefore, in some embodiments, the series of dental instruments are also designed to achieve the elevation and movement of the teeth in the posterior area of ​​the mandible in steps.

[0101] In some embodiments, the total movement of the series of dental instruments to level the mandibular SPEE curve is the sum of the total depression movement of the teeth in the anterior region of the mandible and the total elevation movement of the teeth in the posterior region of the mandible. Specifically, the series of dental instruments makes the total depression movement of the teeth in the anterior region of the mandible 1 / 3-1 / 2 of the total movement required to level the mandibular SPEE curve. Therefore, the series of dental instruments makes the total elevation movement of the teeth in the posterior region of the mandible 1 / 2-2 / 3 of the total movement required to level the mandibular SPEE curve. Generally, the total amount of posterior tooth extension is designed to be between 1mm-1.5mm, and the single-step elevation of the teeth in the posterior region of the mandible corresponding to the orthodontic instruments in each stage of the series of dental instruments is between 0.1mm-0.2mm.

[0102] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

[0103] Similarly, the above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A dental instrument for occlusal adjustment, characterized in that: It includes a first shell-like body for accommodating maxillary teeth and a second shell-like body for accommodating mandibular teeth, wherein the lingual side of the anterior teeth area of ​​the first shell-like body is provided with an adjustment portion for adjusting the vertical occlusal relationship between the upper and lower anterior teeth, and the adjustment portion is at least partially connected to the lingual side of the anterior teeth area of ​​the first shell-like body. When worn, the surface of the adjustment portion adjacent to the opposing teeth applies a depressing force to the area of ​​the second shell-like body corresponding to the teeth in the anterior teeth area of ​​the mandible so that the tooth receiving cavity of the second shell body for accommodating the teeth in the posterior teeth area drives the teeth in the posterior teeth area to move toward the opposite jaw.

2. The dental apparatus according to claim 1, characterized in that The tooth receiving cavity of the second shell-shaped body for accommodating the teeth in the posterior tooth region has a geometric structure capable of wrapping the teeth for movement.

3. The dental apparatus according to claim 2, characterized in that: The tooth receiving cavity of the second shell-shaped body corresponding to the raised teeth in the posterior tooth area has a force application point formed by being concave inwardly toward the tooth near the gum end.

4. The dental apparatus according to claim 2, characterized in that: It also includes a raised attachment provided on the buccal and / or lingual sides of the teeth in the posterior region, wherein the length of the raised attachment in the mesiodistal direction is 1 / 2-2 / 3 of the length of the corresponding tooth in the mesiodistal direction.

5. The dental apparatus according to claim 4, characterized in that: The second shell-like body has a raised accommodation cavity consistent with the contour of the raised attachment at the position corresponding to the raised position. When worn, the raised attachment interacts with the raised accommodation cavity so that the tooth provided with the raised attachment is subjected to a raised force.

6. The dental apparatus according to claim 1 or 4, characterized in that: A traction structure for hanging a traction member is provided on the buccal side of the tooth receiving cavity of the second shell-shaped body accommodating the posterior teeth. The traction structure is pulled by the traction member and applies an auxiliary lifting force to the teeth wrapped in the tooth receiving cavity of the posterior teeth.

7. The dental apparatus according to claim 6, characterized in that The traction structure is formed by extending the buccal side of the tooth receiving cavity of the second shell-shaped body that accommodates the teeth in the posterior tooth area toward the gingival end.

8. The dental apparatus according to claim 6, wherein: The traction structure is not connected to the corresponding tooth receiving cavity in the mesiodistal direction.

9. The dental apparatus according to claim 8, characterized in that The traction structure has a gap with another portion of the surface of the tooth receiving cavity in the mesiodistal direction.

10. The dental apparatus according to claim 1, wherein: The second shell body has a geometric structure that allows the teeth in the anterior region to be accommodated to gradually move from a first position to a second position.

11. The dental apparatus according to claim 10, characterized in that The second shell-shaped body is used for accommodating a tooth receiving cavity of the front teeth and exerts a depressing force on the teeth wrapped therein.

12. The dental apparatus according to claim 11, characterized in that The height of the tooth receiving cavity of the second shell-shaped body for accommodating teeth in the front teeth area in the vertical direction is smaller than the height of the crown of the tooth accommodated therein in the vertical direction.

13. The dental apparatus according to claim 12, characterized in that The height difference between the tooth receiving cavity of the second shell-shaped body for accommodating the teeth in the front teeth area and the crown of the tooth accommodated therein in the vertical direction is between 0.1 mm and 0.2 mm.

14. The dental apparatus according to claim 11 or 12, characterized in that: It also includes a depression attachment provided on the surface of the canine or molar adjacent to the front teeth. When worn, the depression attachment applies a vertical downward force to the second shell-like body so that the second shell-like body applies a depression force to the front teeth.

15. The dental apparatus according to claim 14, characterized in that The surface of the depression attachment adjacent to the gingival end is a concave curved surface formed by being concave toward the opposite jaw.

16. The dental apparatus according to claim 15, characterized in that The second shell-shaped body has a depression accommodating cavity having the same contour as the depression accessory at a position corresponding to the depression accessory.

17. The dental apparatus according to claim 16, characterized in that When worn, the concave curved surface applies a vertical downward force to the depressed accommodating cavity.

18. The dental apparatus according to claim 1, wherein: The adjustment portion includes a cavity structure formed by the lingual side surface of the front teeth area of ​​the first shell-shaped body extending first toward the opposite jaw direction and then toward the posterior teeth direction.

19. The dental apparatus according to claim 18, characterized in that The surface of the cavity structure adjacent to the opposing jaw is a plane parallel to the occlusal surface.

20. The dental apparatus according to claim 19, wherein: The plane is provided with a bite mark structure for locating the position of the mandible, and the bite mark structure is the same shape as the teeth in the anterior teeth area of ​​the opposing jaw.

21. The dental apparatus according to claim 18, wherein: The surface of the cavity structure adjacent to the opposing jaw is an inclined surface for guiding the mandible to move forward.

22. The dental apparatus according to claim 18, wherein: The mechanical strength of the adjusting portion is greater than the mechanical strength of the first shell-shaped body.

23. The dental apparatus according to claim 22, characterized in that The adjusting portion further includes a filling piece located in the cavity structure.

24. The dental apparatus according to claim 18, wherein: The lingual end of the cavity structure adjacent to the surface of the opposing jaw extends toward the palate to form a reinforcement portion for resisting deformation of the cavity structure caused by occlusion.

25. The dental apparatus according to claim 24, characterized in that When worn, at least part of the reinforcement portion fits against the upper palate and is consistent with the curvature of the upper palate.

26. A method for producing a dental instrument, characterized in that: Obtaining the initial SPEE curve depth of the current patient's dentition, and obtaining the target SPEE curve depth at the correction target position according to the correction plan; Determine the first digital dental model and the second digital dental model corresponding to the first shell-shaped body and the second shell-shaped body; wherein the first digital dental model is provided with an adjustment part for adjusting the vertical occlusal relationship of the upper and lower anterior teeth on the lingual side of the anterior teeth area, and the adjustment part is at least partially connected to the lingual side of the anterior teeth area of ​​the first digital dental model; design the tooth elevation amount of the posterior teeth area of ​​the second digital dental model according to the SPEE curve depth and the target SPEE curve depth; Manufacturing the dental instrument: manufacturing a first shell-shaped body and a second shell-shaped body according to the first digital jaw model and the second digital jaw model respectively.

27. The method for producing a dental instrument according to claim 26, characterized in that: The manufacturing of the dental instrument includes: manufacturing the first digital jaw model and the second digital jaw model by additive manufacturing, and manufacturing the first shell body and the second shell body by hot pressing film according to the physical model.

28. The method for producing a dental instrument according to claim 27, characterized in that: The manufacturing of the dental instrument includes: generating a digital model of the first shell-like body and a digital model of the second shell-like body according to the first digital jaw model and the second digital jaw model, and manufacturing the first shell-like body and the second shell-like body by additive manufacturing according to the digital model of the first shell-like body and the digital model of the second shell-like body.

29. A dental correction system, characterized in that: The method comprises M dental instruments as described in any one of claims 1 to 25, wherein the M dental instruments are designed to gradually flatten the mandibular SPEE curve in a step-by-step manner, wherein the second shell-like body in the M dental instruments is used to realize the step-by-step depression movement of the teeth in the mandibular anterior region in the correction plan and is synchronously used to realize the step-by-step elevation movement of the teeth in the mandibular posterior region in the correction plan, and M is a natural number greater than or equal to 2.

30. The dental correction system according to claim 29, characterized in that: The M dental instruments cause at least part of the teeth in the mandibular anterior region to be depressed by 1 / 3-1 / 2 of the total movement required to flatten the mandibular SPEE curve.

31. The dental correction system according to claim 30, characterized in that: A dental instrument for occlusal adjustment has a single-step depression amount of 0.1 mm to 0.2 mm on at least part of the teeth in the mandibular anterior region.

32. The dental correction system according to claim 29, characterized in that: The M dental instruments raise at least part of the teeth in the mandibular posterior area by 1 / 2-2 / 3 of the total movement required to flatten the mandibular SPEE curve.

33. The dental correction system according to claim 32, characterized in that: A dental instrument for occlusal adjustment can raise at least part of the teeth in the mandibular posterior region by a single step of 0.1 mm to 0.2 mm.

34. The dental correction system according to claim 29, characterized in that: The relative position relationship between each adjustment part in the M dental instruments and its corresponding first shell-shaped body is consistent.

35. The dental correction system according to claim 29, characterized in that: As the correction process progresses, each adjustment portion of the M dental instruments gradually approaches the upper palate at the lowest point in the vertical direction.

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