Shell-shaped appliance and generation method, orthodontic system, and dentomaxillary model and design method

Abstract

Disclosed are a shell-shaped appliance and a generation method, an orthodontic system, and a dentomaxillary model and a design method. The shell-shaped appliance comprises a shell-shaped body (1) for accommodating teeth. The shell-shaped body (1) is of an integrally formed structure; a first protrusion part (12) for reconstructing an upper and lower jaw engagement position protrudes from an occlusal surface of a posterior tooth region of the shell-shaped body (1) toward the opposite jaw; a buccal side surface of the first protrusion part (12) is provided with a first reinforcing ridge (121) for improving the deformation resistance of the first protrusion part (12); the first reinforcing ridge (121) is formed by inwardly recessing the buccal side surface of the first protrusion part (12); a lingual side surface of the first protrusion part (12) is provided with a second reinforcing ridge (122) for improving the deformation resistance of the first protrusion part (12); the second reinforcing ridge (122) is formed by inwardly recessing the lingual side surface of the first protrusion part (12); at least two adjacent first reinforcing ridges (121) and second reinforcing ridges (122) are arranged in a staggered manner in the buccal and lingual directions.

Description

Shell-shaped appliance and generation method, treatment system, dental model and design method CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is based on the Chinese Patent Application No. 2024110447481 entitled “Shell-shaped appliance and generation method, treatment system, dental model and design method” and “Shell-shaped appliance, treatment system and dental model” filed on July 31, 2024, and the Chinese Patent Application No. 202421843167X entitled “Shell-shaped appliance and generation method, treatment system, dental model and design method”, the application documents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the field of orthodontic technology, and in particular to a shell-shaped appliance and generation method, treatment system, dental model and design method. BACKGROUND

[0003] At present, in the field of orthodontic treatment technology, functional tooth treatment is a conventional treatment method for children and adolescents during the deciduous tooth period and the replacement tooth period. Single jaw plate or Twin-Block treatment technology is a conventional treatment method.

[0004] Since the development of invisible tooth aligners, more and more people have chosen them due to their comfort, convenience, and aesthetic advantages. With the continuous improvement of invisible treatment technology, functional invisible treatment has also appeared in people's field of vision, such as the advent of invisible single jaw plate aligners or invisible Twin-Block aligners. Among them, the invisible single jaw plate aligner can open the bite while flattening the SPEE curve and treating mild mandibular retrusion cases by designing a protruding structure in the posterior region; the invisible Twin-Block aligner guides the mandibular protrusion through the mesial-distal inclined surface of the two protruding jaw pads when the patient bites. The reverse invisible Twin-Block aligner guides the mandibular retrusion through the mesial-distal inclined surface of the two protruding jaw pads when the patient bites.

[0005] At present, most of the existing invisible single-jaw plate correctors or invisible Twin-Block correctors are molded by pressing film, and the convex jaw pads are mostly hollow structures. In the process of use by the patient, on the one hand, the jaw pad may be deformed after being bitten for many times due to insufficient rigidity or insufficient support. In the prior art, a reinforcing ridge structure is added on both sides of the convex jaw pad (for example, Chinese patent 202320657561.3) to solve this technical problem. In this case, in order to obtain better support in the vertical direction, the reinforcing ridges on both sides are arranged at the interproximal space. This arrangement method may cause a new technical problem, that is, the difference between the width of the reinforcing ridges on both sides of the occlusal surface of the convex part and the width of the adjacent convex part is large. Due to the hollow structure of the convex part, stress concentration is more likely to occur at the position with a large width on the occlusal surface of the convex part during biting, that is, the convex part at these positions is more likely to collapse. If the patient continues to use the corrector with the deformed convex part, the following problems may occur: (1) the correction force is insufficient, and the preset occlusal position cannot be reached, and the subsequent correction steps cannot be normally performed; (2) the direction of the predetermined force is changed, and the teeth are moved in an unexpected direction due to unexpected force, and finally the entire correction plan is destroyed. On the other hand, the two hollow structure convex jaw pads may be directly bitten and damaged by the patient during use, and cannot be used continuously. In this case, the patient needs to re-press the film to produce the invisible corrector required for this step, which increases the correction cost and prolongs the treatment cycle. At the same time, during the waiting period for the production of the new invisible corrector, the teeth may move in an unexpected direction due to the interruption of treatment, and the subsequent invisible corrector cannot match the teeth that have moved, which may eventually lead to the restart of correction. In addition, due to the existence of unexpected force, the jaw pads may slide in the buccal-lingual direction during use, and the upper and lower jaws cannot accurately reach the preset occlusal position, which may cause a malocclusion problem.

[0006] Therefore, it is of great significance to research a functional invisible corrector that has the characteristics of comfort and convenience of an invisible corrector and does not reduce the correction force of a functional corrector. SUMMARY

[0007] The purpose of the embodiments of the present application is to provide a shell-shaped corrector and a generation method, a correction system, a dental model and a design method, which effectively solve the above problems and avoid stress concentration on the occlusal surface when the reinforcing ridge is arranged on the convex part.

[0008] To achieve the above object, the embodiment of the present application provides a shell-shaped appliance, comprising a shell-shaped body for accommodating teeth, the shell-shaped body being an integral structure, the shell-shaped body being provided with a first protruding part for reconstructing the upper and lower occlusal position in the occlusal surface of the posterior tooth area in the opposite jaw direction, the buccal side of the first protruding part being provided with a first reinforcing ridge for improving the deformation resistance of the first protruding part, the first reinforcing ridge being formed by inwardly recessing the buccal side of the first protruding part, the lingual side of the first protruding part being provided with a second reinforcing ridge for improving the deformation resistance of the first protruding part, the second reinforcing ridge being formed by inwardly recessing the lingual side of the first protruding part, wherein at least two adjacent first reinforcing ridges and second reinforcing ridges are arranged in a staggered manner in the buccal-lingual direction.

[0009] Another embodiment of the present application provides a shell-shaped appliance, comprising a first shell-shaped body for accommodating the upper teeth and a second shell-shaped body for accommodating the lower teeth, the first shell-shaped body being the shell-shaped appliance described in any one of the above embodiments, the second shell-shaped body being provided with a second protruding part for cooperating with the first protruding part of the first shell-shaped body to move the lower jaw in the sagittal direction in the occlusal surface of the posterior tooth area in the opposite jaw direction; when the shell-shaped appliance is worn, the mesial surface of the first protruding part and the distal surface of the second protruding part interact to move the lower jaw in the sagittal direction to the target occlusal position.

[0010] Another embodiment of the present application provides a method for generating a shell-shaped appliance, the method comprising: manufacturing an entity model of a digital dental arch model obtained by the method for designing a digital dental arch model described in any one of the above embodiments by additive manufacturing; and manufacturing the shell-shaped appliance by hot stamping according to the entity model, or generating a digital model of the shell-shaped appliance according to the digital dental arch model obtained by the method for designing a digital dental arch model described in any one of the above embodiments, and manufacturing the shell-shaped appliance by additive manufacturing according to the digital model of the shell-shaped appliance.

[0011] The shell-shaped appliance, the method for generating the shell-shaped appliance, the orthodontic system, the dental arch model and the method for designing the dental arch model provided by the present application have the following advantages compared with the prior art:

[0012] The first protruding part on the shell-shaped body in each embodiment in the present application solves the problem of mandibular retrusion, deep overbite, deep overjet and other jaw position problems. In order to avoid the problem of local stress concentration caused by the large width difference of the first protruding part on the occlusal surface of the first protruding part provided with a hollow structure and the reinforcing ridge, the reinforcing ridges on both sides of the first protruding part are arranged in a staggered manner, the size ratio between the buccal-lingual width of the first protruding part is reduced, and the limit load of the first protruding part in the occlusal direction is improved, so that the first protruding part is not prone to compression buckling deformation in the occlusal direction. Therefore, the structure improvement of the reinforcing ridge on the first protruding part in the present application can improve the anti-deformation ability of the first protruding part in the occlusal direction, and ensure the accuracy and stability of the treatment effect.

[0013] The shell-shaped appliance in another embodiment of the present application comprises a first shell-shaped body for the upper jaw and a second shell-shaped body for the lower jaw, the first shell-shaped body has a first protruding part, and the second shell-shaped body has a second protruding part. The mesial surface of the first protruding part interacts with the distal surface of the second protruding part to move the lower jaw forward or backward in the sagittal direction to a target occlusal position. The first protruding part and the second protruding part both have reinforcing ridges arranged in a staggered manner on both sides, so that the anti-deformation ability of the first protruding part and the second protruding part in the occlusal direction is improved, and the first shell-shaped body and the second shell-shaped body are not prone to deformation in the occlusal direction during use.

[0014] The present application also provides a treatment system. In one embodiment, the treatment system comprises a plurality of shell-shaped appliances each comprising a first shell-shaped body and a second shell-shaped body. During the entire treatment process, the height of the first protruding part and the second protruding part is gradually adjusted to gradually adjust the upper and lower jaw position relationship, and N sets of shell-shaped appliances adjust the teeth to be aligned while adjusting the upper and lower jaw position relationship, so that the orthodontic treatment is performed simultaneously. In another embodiment, the treatment system comprises N shell-shaped appliances, at least M first shell-shaped bodies are arranged continuously in the N shell-shaped appliances, and the maximum buccal-lingual width of the first protruding part on different first shell-shaped bodies can be inconsistent. The advantage of this arrangement is that the position of the occlusal force on the occlusal surface of the first protruding part is different at different stages, and the maximum width is set to avoid these positions, thereby avoiding compression buckling deformation of the first protruding part in the occlusal direction during use.

[0015] The present application also provides a design method of digital dental and jaw model. The initial model of the protruding part is obtained through the morphology of the occlusal surface of the posterior teeth or the accessory library, and the size of the initial model of the protruding part is further adjusted, and the first reinforcing ridge and the second reinforcing ridge arranged in a staggered manner are arranged on both sides of the initial model of the protruding part according to the requirements, so as to realize the design and manufacture of the shell-shaped appliance with the first protruding part. And the first protruding part has the first reinforcing ridge and the second reinforcing ridge arranged in a staggered manner. BRIEF DESCRIPTION OF DRAWINGS

[0016] One or more embodiments are illustrated by way of example in the figures that are part of this disclosure and which are illustrative, but not restrictive, of the embodiments, in which like references indicate similar elements, and in which the scope of the embodiments is not limited to the specific depictions depictions in the figures. The figures in the drawings are not necessarily to scale, except insofar as otherwise indicated.

[0017] Fig. 1 is a structural schematic diagram of a shell-shaped appliance with a protrusion in the prior art;

[0018] Fig. 2 is a structural schematic diagram of a shell-shaped appliance with two side reinforcing ridges on the protrusion in the prior art;

[0019] Fig. 3 is a structural schematic diagram of a shell-shaped appliance in an embodiment of the present application;

[0020] Fig. 4 is a structural schematic diagram of a first protrusion in an embodiment of the present application;

[0021] Fig. 5 is a schematic diagram of the force on the first protrusion in some embodiments of the present application;

[0022] Fig. 6 is a schematic diagram of different shapes of the occlusal surface of the first protrusion in some embodiments of the present application;

[0023] Figs. 7-11 are structural schematic diagrams of the first protrusion in an embodiment of the present application;

[0024] Figs. 12 and 13 are structural schematic diagrams of a shell-shaped appliance in an embodiment of the present application;

[0025] Figs. 14-16 are structural schematic diagrams of a second protrusion in an embodiment of the present application;

[0026] Fig. 17 is a structural schematic diagram of a treatment system in an embodiment of the present application;

[0027] Fig. 18 is a structural schematic diagram of a treatment system in an embodiment of the present application;

[0028] Fig. 19 is a structural schematic diagram of a first protrusion on at least two shell-shaped appliances of M shell-shaped appliances in an embodiment of the present application;

[0029] Fig. 20 is a structural schematic diagram of a dental model in an embodiment of the present application;

[0030] Fig. 21 is a flowchart of a design method of a digital dental model in an embodiment of the present application;

[0031] Fig. 22 is a schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] In order to make the purposes, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the drawings. However, those skilled in the art can understand that, in the embodiments of the present application, many technical details are presented in order to make the readers better understand the present application. However, the technical solutions claimed by the present application can be implemented even without these technical details and various changes and modifications based on the following embodiments. The division of the following embodiments is for the convenience of description, and should not constitute any limitation on the specific implementation modes of the present application, and the embodiments can be combined and referenced with each other on the premise of no contradiction.

[0033] The “posterior teeth region” mentioned in the embodiments of the present application is defined according to the classification of teeth in the 2nd edition of “Introduction to Oral Medicine” published by Peking University Medical Publishing House, pages 36-38, and includes premolars and molars, which are teeth 4-8 in the FDI marking method, and the teeth in the anterior teeth region are teeth 1-3 in the FDI marking method. The teeth in the anterior teeth region include central incisors, lateral incisors, and canines. In addition, for teeth in the deciduous tooth stage, the “posterior teeth region” is defined according to the classification of deciduous teeth in the 2nd edition of “Introduction to Oral Medicine” published by Peking University Medical Publishing House, pages 40-41, which includes three types of deciduous incisors, deciduous canines, and deciduous molars, among which the deciduous incisors include deciduous central teeth and deciduous lateral incisors, and the deciduous molars include the first deciduous molar and the second deciduous molar.

[0034] The shell-shaped body is provided with a plurality of cavities for accommodating a plurality of teeth, and is divided into a lingual surface and a labial surface, a mesial surface and a distal surface. Among them, the “lingual surface” is named according to the naming of the surfaces of the tooth crown in the 2nd edition of “Introduction to Oral Medicine” published by Peking University Medical Publishing House, pages 35-36, in which the labial surface and the buccal surface are the surface of the crown of the anterior teeth close to the lips, which is called the labial surface, and the surface of the crown of the posterior teeth close to the cheek, which is called the buccal surface. The lingual surface is the surface of the crown of the anterior teeth and the posterior teeth close to the tongue, which is collectively called the lingual surface. The mesial surface and the distal surface are the two surfaces of the crown adjacent to the adjacent teeth, collectively called the adjacent surface. The surface closer to the midline of the surface part is called the mesial surface, and the surface farther away from the midline of the surface part is called the distal surface.

[0035] The shell-shaped appliance is a hidden and aesthetic dental correction mechanical device designed and produced by computer three-dimensional design, usually worn on the teeth in the mouth, composed of high polymer materials, such as TPU, PETG, or both materials, etc., which can generate force to change the deformed jaw, misaligned teeth, and periodontal tissue, which is beneficial to the normal growth and development of the teeth and jaw. The shell-shaped appliance uses the principle of biomechanics to correct deformed teeth, applies gentle and persistent biological force through a series of shell-shaped appliances, slowly moves the teeth, and restores the teeth to the normal position to arrange the teeth in order. Of course, in the present application, in addition to aligning the teeth, the shell-shaped appliance can also adjust the jaw position relationship of the upper and lower jaws by setting the protruding part structure.

[0036] The core technical problem solved in various embodiments of the present application is that for the invisible aligner with the protruding part, in order to produce and manufacture simply and quickly and ensure the comfort of the patient during wearing, the protruding part and the shell body are arranged in an integral structure. However, due to this design, the protruding part inside is a cavity structure that does not contact the teeth during wearing of the shell body, which can cause the protruding part to be easily deformed and other problems during use. In the prior art, a reinforcing ridge is generally arranged on both sides of the protruding part. Referring to the prior art scheme shown in FIGS. 1 and 2, generally, the protruding part has sufficient width in the buccolingual direction to ensure the stability of the protruding part during use. In order to enable the upper and lower edges of the protruding part to obtain more support edges on the occlusal surface of the teeth and the occlusal surface of the opposite teeth, especially at the interproximal space, the upper and lower edges of the protruding part also do not hang in the air but are also supported on the occlusal surface of the teeth, the reinforcing ridges on both sides need to be arranged corresponding to the interproximal space. The interproximal spaces on both sides of the teeth are symmetrical, that is, the reinforcing ridges on both sides are arranged in position in the buccolingual direction.

[0037] The present inventors have found that when the reinforcing ridges on both sides are arranged in position, the width of the reinforcing ridges in the buccolingual direction is much smaller than the width of the non-reinforcing ridge part on the occlusal surface in the buccolingual direction, which can cause the area with a larger width in the buccolingual direction on the occlusal surface of the protruding part to be more prone to stress concentration, so that the protruding part is prone to deformation in these areas during occlusion. In various embodiments of the present application, the reinforcing ridges on both sides of the protruding part are arranged in a staggered manner, which can effectively increase the width in the buccolingual direction or the length in the mesiodistal direction of the area prone to deformation in the prior art, so that the limit load of the protruding part in the occlusal direction is improved, the anti-deformation ability of the protruding part as a whole is improved, and the stability of the shell aligner during use is ensured.

[0038] The various embodiments of the present application will be described below with reference to the accompanying drawings.

[0039] Embodiment One

[0040] Referring to FIGS. 3 and 4, the embodiment of the present application provides a shell-shaped appliance, which comprises a shell-shaped body 1 for accommodating teeth, the shell-shaped body 1 being a one-piece structure, the shell-shaped body 1 having a plurality of tooth receiving cavities 11, the plurality of tooth receiving cavities 11 wrapping all teeth of a jaw of the shell-shaped appliance. The shell-shaped body 1 is provided with a first protrusion 12 for reconstructing the occlusal position of the upper and lower jaws on the occlusal surface of the tooth receiving cavities 11 wrapping the posterior teeth, the buccal side of the first protrusion 12 having a first reinforcing ridge 121 for improving the deformation resistance of the first protrusion 12, the first reinforcing ridge 121 being formed by inwardly recessing the buccal side of the first protrusion 12, the lingual side of the first protrusion 12 having a second reinforcing ridge 122 for improving the deformation resistance of the first protrusion 12, the second reinforcing ridge 122 being formed by inwardly recessing the lingual side of the first protrusion 12, wherein at least two adjacent first reinforcing ridges 121 and second reinforcing ridges 122 are arranged in a staggered manner in the buccal-lingual direction, thereby improving the ultimate load of the first protrusion 12 in the occlusal direction and improving the overall compression resistance of the first protrusion 12. The inwardly recessed recess direction is the direction towards the cavity structure inside the first protrusion 12.

[0041] In some embodiments, the projections of the adjacent first reinforcing ridges 121 and second reinforcing ridges 122 on the sagittal plane overlap, i.e., the adjacent first reinforcing ridges 121 and second reinforcing ridges 122 are arranged in a partially staggered manner in the buccal-lingual direction. Alternatively, the projections of the adjacent first reinforcing ridges 121 and second reinforcing ridges 122 on the sagittal plane do not overlap, i.e., the adjacent first reinforcing ridges 121 and second reinforcing ridges 122 are arranged in a completely staggered manner in the buccal-lingual direction. In contrast to the prior art, the completely staggered or partially staggered arrangement of the first reinforcing ridges 121 and second reinforcing ridges 122 in the buccal-lingual direction can reduce the length in the mesial-distal direction and / or the width in the buccal-lingual direction of the area where stress concentration is prone to occur, thereby improving the ultimate load of the protrusion in the occlusal direction and improving the deformation resistance of the first protrusion 12.

[0042] The inventor of the present application analyzes the prior art and arranges the reinforcing ridges on both sides to be misaligned in the buccal-lingual direction (partially misaligned and completely misaligned), which can improve the limit load of the protruding part in the occlusal direction and is less likely to deform. For specific analysis, refer to FIG. 5 and FIG. 6. FIG. 5 is a schematic diagram of the force on the protruding part, wherein the X-axis is the mesiodistal direction, the Z-axis is the occlusal direction, and F is the force on the protruding part during occlusion. FIG. 6 is the shape of the occlusal surface of different protruding parts, wherein the Y-axis is parallel to the buccal-lingual direction, FIG. A is the shape of the protruding part with the two reinforcing ridges on both sides aligned, FIG. B is the shape of the occlusal surface of the protruding part when the first reinforcing ridge 121 and the second reinforcing ridge 122 on both sides of the protruding part are completely misaligned, and FIG. C is the shape of the occlusal surface of the protruding part when the first reinforcing ridge 121 and the second reinforcing ridge 122 on both sides of the protruding part are partially misaligned.

[0043] When the cusps of the opposite teeth act on the occlusal surface of the protruding part, the occlusal surface of the protruding part is compressed. Since the protruding part is a hollow structure, the edge of the occlusal surface of the protruding part can be approximately regarded as a thin plate. The limit load of the four-edge fixed rectangular thin plate subjected to central vertical load is:

[0044]

[0045] E is the elastic modulus of the material, v is the Poisson's ratio of the material, a is the width of the rectangle, b is the length of the rectangle, and t is the thickness of the material (in each embodiment of the present application, it refers to the thickness of the corresponding diaphragm of the protruding part).

[0046] It can be seen from the above formula that for a rectangular thin plate, the longer the side length, the smaller the limit load. The occlusal surface of the protruding part with the reinforcing ridges on both sides aligned and the protruding part with the reinforcing ridges misaligned can be regarded as several rectangular thin plates spliced together.

[0047] As can be seen from the above, in FIG. A and FIG. B, HA is greater than HB, that is, the limit load of the occlusal surface of the protruding part when the first reinforcing ridge 121 and the second reinforcing ridge 122 are completely misaligned is greater than the limit load of the occlusal surface of the protruding part when the reinforcing ridges on both sides are aligned. Therefore, compared with the arrangement in FIG. A, the completely misaligned arrangement of the first reinforcing ridge 121 and the second reinforcing ridge 122 can improve the anti-deformation ability of the protruding part. In FIG. A and FIG. C, that is, the limit load of the occlusal surface of the protruding part when the first reinforcing ridge 121 and the second reinforcing ridge 122 are partially misaligned is greater than the limit load of the occlusal surface of the protruding part when the reinforcing ridges on both sides are aligned. Therefore, compared with the arrangement in FIG. A, the completely misaligned arrangement of the first reinforcing ridge 121 and the second reinforcing ridge 122 can improve the anti-deformation ability of the protruding part.

[0048] The occlusal surface of the first protruding portion 12 in each embodiment of the present application refers to the surface that contacts the occlusal surface of the opposing tooth or the occlusal surface of the opposing shell aligner during wearing of the shell aligner.

[0049] In some embodiments, when the projections of the adjacent first reinforcing ridge 121 and the second reinforcing ridge 122 in the sagittal plane partially overlap, in order to further improve the ultimate load of the occlusal surface of the first protruding portion 12, i.e., the less the projections of the adjacent first reinforcing ridge 121 and the second reinforcing ridge 122 in the sagittal plane overlap, the greater the ultimate load of the occlusal surface of the first protruding portion 12. Therefore, under the premise that the overlap of the projections of the adjacent first reinforcing ridge 121 and the second reinforcing ridge 122 in the sagittal plane is as small as possible, and the first reinforcing ridge 121 and the second reinforcing ridge 122 have a sufficient number on both sides of the first protruding portion 12 to ensure the deformation resistance of the first protruding portion 12 in the mesial-distal direction, the width of the overlapping portion of the first reinforcing ridge 121 and the second reinforcing ridge 122 in the mesial-distal direction is less than or equal to 1 / 2 of the width of the first reinforcing ridge 121 in the mesial-distal direction. For example, with reference to FIG. 7, line P is a boundary line parallel to the buccal-lingual direction passing through the most distal point of the first reinforcing ridge 121 in the mesial direction, line P' is a boundary line parallel to the buccal-lingual direction passing through the most distal point of the second reinforcing ridge 122 in the mesial direction, and the shaded portion D in the figure is the overlapping portion of the first reinforcing ridge 121 and the second reinforcing ridge 122, the width h1 of the overlapping portion in the mesial-distal direction is less than or equal to 1 / 2 of the width H1 of the first reinforcing ridge 121 in the mesial-distal direction.

[0050] In other embodiments, when the projections of the adjacent first reinforcing ridge 121 and second reinforcing ridge 122 in the sagittal plane partially overlap, in order to further improve the ultimate load of the occlusal surface of the first protruding portion 12, i.e. the less the projections of the adjacent first reinforcing ridge 121 and second reinforcing ridge 122 in the sagittal plane overlap, the greater the ultimate load of the occlusal surface of the first protruding portion 12. Therefore, under the premise that the overlap of the projections of the adjacent first reinforcing ridge 121 and second reinforcing ridge 122 in the sagittal plane is as small as possible, and that the first reinforcing ridge 121 and second reinforcing ridge 122 have a sufficient number on both sides of the first protruding portion 12 to ensure the deformation resistance of the first protruding portion 12 in the mesiodistal direction, the width of the overlap of the second reinforcing ridge 122 and the first reinforcing ridge 121 in the mesiodistal direction is less than or equal to 1 / 2 of the width of the second reinforcing ridge 122 in the mesiodistal direction. For example, with reference to FIG. 8, line P is a boundary line parallel to the buccolingual direction passing through the most distal point of the first reinforcing ridge 121 in the mesial direction, line P' is a boundary line parallel to the buccolingual direction passing through the most distal point of the second reinforcing ridge 122 in the mesial direction, and the shaded portion E in the figure is the overlap of the first reinforcing ridge 121 and the second reinforcing ridge 122, the width h2 of the overlap in the mesiodistal direction is less than or equal to 1 / 2 of the width H2 of the second reinforcing ridge 122 in the mesiodistal direction.

[0051] In some embodiments, as shown in FIG. 9, the projections of the adjacent first reinforcing ridge 121 and the second reinforcing ridge 122 on the sagittal plane do not overlap. That is, the first reinforcing ridge 121 and the second reinforcing ridge 122 are completely staggered in the buccolingual direction. In some embodiments, the shortest distance between the first reinforcing ridge 121 and the contour edge where the second reinforcing ridge 122 is located is a first distance L1, and the shortest distance between the second reinforcing ridge 122 and the contour edge where the first reinforcing ridge 121 is located is a second distance L2, and the difference between any one first distance and any one second distance is within a predetermined range, wherein the predetermined range is 0-4 mm, and the difference between any one first distance and any one second distance can be 0 mm or 2 mm or 4 mm, and the optimal embodiment is that the difference between any one first distance and any one second distance is 0 mm. However, since the width of the first protruding part 12 in the buccolingual direction needs to be as small as possible, it is generally less than or equal to the buccolingual width of the occlusal surface of the tooth where it is located, so the width of the first protruding part 12 in the buccolingual direction is not completely equal in general, but in order to ensure that the occlusal surface of the first protruding part 12 does not have a problem of stress concentration due to excessive local width, the difference between any one first distance L1 and any one second distance L2 in the present embodiment is within a predetermined range, which can ensure that the difference between the corresponding buccolingual width at any one first reinforcing ridge 121 and the corresponding buccolingual width at any one second reinforcing ridge 122 on the occlusal surface of the first protruding part 12 is not too large, so that the first protruding part 12 does not have a problem of local extreme load being too small at the corresponding first reinforcing ridge 121 or second reinforcing ridge 122, avoiding stress concentration and deformation in the local area.

[0052] In some embodiments, all adjacent first reinforcing ridges 121 and second reinforcing ridges 122 are staggered in the buccolingual direction. This further ensures that the difference between the width of the occlusal surface of the first protruding part 12 in the buccolingual direction is not too large when multiple first reinforcing ridges 121 and multiple second reinforcing ridges 122 are provided on both sides of the first protruding part 12, avoiding the problem of local extreme load being too small, stress concentration and further deformation in the local area, which affects the treatment effect of the shell-shaped aligner.

[0053] In some embodiments, as shown in FIGS. 7, 8 and 9, the first reinforcing ridge 121 and the second reinforcing ridge 122 each have multiple, and the number of first reinforcing ridges 121 is consistent with the number of second reinforcing ridges 122. The advantage of this arrangement is that the bending section coefficient of the side surface where the first reinforcing ridge 121 and the second reinforcing ridge 122 of the first protruding part 12 are located is basically consistent. In some embodiments, the multiple first reinforcing ridges 121 and the multiple second reinforcing ridges 122 are staggered in the mesiodistal direction. Similarly, this arrangement can ensure that the difference between the width of the occlusal surface of the first protruding part 12 in the buccolingual direction is not too large.

[0054] In some embodiments, the first reinforcing ridge 121 and the second reinforcing ridge 122 have the same shape and size. The bending resistance coefficient of the side surface where the first reinforcing ridge 121 and the second reinforcing ridge 122 are located can be ensured to be substantially the same, so that the first protruding part 12 has stable anti-deformation ability during use.

[0055] Further, the width of the first reinforcing ridge 121 in the mesial-distal direction gradually decreases from the buccal side to the lingual side; and / or, the width of the second reinforcing ridge 122 in the mesial-distal direction gradually decreases from the lingual side to the buccal side. The advantage of such an arrangement is that, when the shell-shaped appliance is made by the hot pressing film process, the arrangement of gradually decreasing width from the lingual side to the buccal side is easier to absorb and form, and also easier to demold when the shell-shaped appliance is separated from the dental model. Referring to FIGS. 7, 8 and 9, the cross-sectional shape of the first reinforcing ridge 121 and the second reinforcing ridge 122 in the horizontal plane is polygonal or semicircular. Different cross-sectional shapes result in different anti-deformation abilities of the first protruding part 12. The bending resistance coefficient of the trapezoidal shape is the largest, followed by the semicircular shape, and then the V-shaped (triangular) shape. However, the first reinforcing ridge 121 and the second reinforcing ridge 122 of the trapezoidal shape require the side surface of the first protruding part 12 to have a certain length in the mesial-distal direction. In some embodiments, referring to FIG. 10, the maximum width Y1 of the first reinforcing ridge 121 in the mesial-distal direction is between 2.0 mm and 3.0 mm (including the end point value); and the maximum width Y2 of the second reinforcing ridge 122 in the mesial-distal direction is between 2.0 mm and 3.0 mm (including the end point value). Here, the maximum width of the first reinforcing ridge 121 and the second reinforcing ridge 122 in the mesial-distal direction refers to the width value near the edge of the first protruding part 12. The inventors have found through a large number of verifications that such a width value can ensure that the first reinforcing ridge 121 and the second reinforcing ridge 122 have greater bending resistance, and during the process of making the shell-shaped appliance by the hot pressing film process, such a width value can ensure the consistency of the thickness of the first protruding part 12, so that the overall thickness of the first protruding part 12 is relatively uniform, and the problem of deformation occurring more easily at a position with thinner thickness during use can be avoided.

[0056] That is, in some embodiments, referring to FIG. 3, the first protruding part 12 covers the occlusal surfaces of three teeth between tooth No. 3 and tooth No. 7, and a number of first reinforcing ridges 121 and second reinforcing ridges 122 are arranged, the first reinforcing ridges 121 and the second reinforcing ridges 122 are arranged in the mesial-distal direction in turn, and the cross-sectional shape of the first reinforcing ridges 121 and the second reinforcing ridges 122 in the horizontal plane is trapezoidal.

[0057] In some embodiments, as shown in FIG. 11, the inward recessing depth value X1 of the first reinforcing ridge 121 is between 1 / 4-1 / 3 of the average buccolingual width value of the first protruding part 12, and / or the inward recessing depth value X2 of the second reinforcing ridge 122 is between 1 / 4-1 / 3 of the average buccolingual width value of the first protruding part 12. The inward recessing depth value of the first reinforcing ridge 121 and / or the second reinforcing ridge 122 refers to the recessing depth of the side surface of the first protruding part 12 in the direction of the hollow interior of the first protruding part 12. In this embodiment, the inward recessing depth value of the first reinforcing ridge 121 and / or the second reinforcing ridge 122 is set to be between 1 / 4-1 / 3 of the average buccolingual width value of the first protruding part 12, so that if the first reinforcing ridge 121 or the second reinforcing ridge 122 is recessed too deeply during the manufacturing of the shell aligner by the thermoforming process, the thickness of the film at the recessed position of the first reinforcing ridge 121 and the second reinforcing ridge 122 is thinner than other positions, which makes the overall thickness of the first protruding part 12 uneven, and the position with thinner thickness is more prone to deformation during use. Therefore, after a large number of research and experimental verification, the inventors of the present application set the inward recessing depth value X1 of the first reinforcing ridge 121 to be between 1 / 4-1 / 3 of the average buccolingual width value of the first protruding part 12, and / or the inward recessing depth value X2 of the second reinforcing ridge 122 to be between 1 / 4-1 / 3 of the average buccolingual width value of the first protruding part 12, so that the first reinforcing ridge 121 and / or the second reinforcing ridge 122 has a certain inward recessing depth, which ensures the bending resistance of the side surface of the first protruding part 12. At the same time, the inward recessing depth value is not too large, which avoids the consistency of the thickness of the first protruding part 12 during the manufacturing of the shell aligner by the thermoforming process.

[0058] Further, the inward recessing depth value X1 of the first reinforcing ridge 121 can be the average inward recessing depth value of the first reinforcing ridge 121 or the inward recessing depth value of the first reinforcing ridge 121 on the occlusal surface of the first protruding part 12, and the inward recessing depth value X2 of the second reinforcing ridge 122 can be the average inward recessing depth value of the second reinforcing ridge 122 or the inward recessing depth value of the second reinforcing ridge 122 on the occlusal surface of the first protruding part 12.

[0059] In some embodiments, the buccolingual width value of the first protruding part 12 is 5mm-10mm, and the inward recessing depth value of the first reinforcing ridge 121 or the second reinforcing ridge 122 is 1.0mm-2.0mm. In this way, the first reinforcing ridge 121 and / or the second reinforcing ridge 122 has a certain inward recessing depth, which ensures the bending resistance of the side surface of the first protruding part 12. At the same time, the inward recessing depth value of the first reinforcing ridge 121 or the second reinforcing ridge 122 is between 1.0mm-2.0mm, which is not too large, which avoids the consistency of the thickness of the first protruding part 12 during the manufacturing of the shell aligner by the thermoforming process.

[0060] In some embodiments, as shown in FIG. 3, when worn, the first protruding portion 12 is supported on the occlusal surface of the teeth of the same jaw adjacent to the lower contour edge of the same jaw; the first protruding portion 12 is supported on the occlusal surface of the teeth of the opposite jaw adjacent to the upper contour edge of the opposite jaw; the first reinforcing ridge 121 and the second reinforcing ridge 122 pass through the upper contour edge and the lower contour edge, respectively. The advantage of such an arrangement is that the first protruding portion 12 of the first reinforcing ridge 121 and the second reinforcing ridge 122 in each embodiment has a long enough support edge in the occlusal direction / vertical direction, thereby improving the support of the first protruding portion 12 in the occlusal direction or the vertical direction during use, and further avoiding problems such as collapse or occlusal compression deformation of the hollow structure of the first protruding portion 12 during use. In some embodiments, in order to ensure the consistency of the bending resistance of the side surface of the first protruding portion 12, the depth value of the inward recess of the first reinforcing ridge 121 is equal in the occlusal direction / vertical direction, and the depth value of the inward recess of the second reinforcing ridge 122 is equal in the occlusal direction / vertical direction.

[0061] Embodiment Two

[0062] The present embodiment provides a shell-shaped appliance, as shown in FIG. 12 and FIG. 13, the shell-shaped appliance includes a first shell-shaped body 10 that at least partially accommodates the upper teeth and a second shell-shaped body 20 that at least partially accommodates the lower teeth, the first shell-shaped body 10 is as described in the shell-shaped appliance of embodiment 1 described above; the second shell-shaped body 20 is provided with a second protruding portion 22 in the occlusal surface of the posterior region that protrudes in the direction of the opposite jaw to cooperate with the first protruding portion 12 in the first shell-shaped body 10 to move the lower jaw in the sagittal direction; when worn, the mesial surface of the first protruding portion 12 and the distal surface of the second protruding portion 22 interact to move the lower jaw forward or backward in the sagittal direction to the target occlusal position. And in some embodiments, the tooth receiving cavities of the first shell-shaped body 10 and the second shell-shaped body 20 have a geometry that moves the patient's teeth from a first arrangement to a second arrangement, so that the shell-shaped appliance in the present application can complete the orthodontic treatment synchronously, shortening the treatment process.

[0063] In some embodiments, the first protruding portion 12 and the first shell-shaped body 10 are a one-piece structure, and the second protruding portion 22 and the second shell-shaped body 20 are a one-piece structure.

[0064] The first shell body 10 of the shell-shaped appliance in each embodiment of the present application and the design of the first reinforcing ridge 121 and the second reinforcing ridge 122 on the first protruding portion 12 of the first shell body 10 are the same as the design of the first reinforcing ridge 121 and the second reinforcing ridge 122 in the shell-shaped appliance worn on a single jaw in Embodiment 1, and thus no further elaboration is provided herein. The second shell body 20 of the shell-shaped appliance in each embodiment of the present application has a plurality of tooth receiving cavities that wrap all erupted teeth of the opposite jaw of the jaw on which the first shell body 10 is worn.

[0065] In some embodiments, the buccal side of the second protruding portion 22 has a third reinforcing ridge 221 formed by inwardly recessing the buccal side of the second protruding portion 22 to improve the deformation resistance of the second protruding portion 22, and the lingual side of the second protruding portion 22 has a fourth reinforcing ridge 222 formed by inwardly recessing the lingual side of the second protruding portion 22 to improve the deformation resistance of the second protruding portion 22, wherein at least two adjacent third reinforcing ridges 221 and fourth reinforcing ridges 222 are arranged in a buccal-lingual direction.

[0066] The occlusal surface of the second protruding portion 22 in each embodiment of the present application refers to the surface that contacts the occlusal surface of the teeth of the opposite jaw or the occlusal surface of the shell-shaped appliance worn on the opposite jaw during the wearing of the shell-shaped appliance.

[0067] In some embodiments, when the projections of adjacent third reinforcing ridges 221 and fourth reinforcing ridges 222 on the sagittal plane overlap, in order to further improve the ultimate load of the occlusal surface of the second protruding portion 22, the less the projections of adjacent third reinforcing ridges 221 and fourth reinforcing ridges 222 on the sagittal plane overlap, the greater the ultimate load of the occlusal surface of the second protruding portion 22. Therefore, under the premise that the overlapping part of the projections of adjacent third reinforcing ridges 221 and fourth reinforcing ridges 222 on the sagittal plane is as small as possible, and there are a sufficient number of third reinforcing ridges 221 and fourth reinforcing ridges 222 on both sides of the second protruding portion 22 to ensure the deformation resistance of the second protruding portion 22 in the mesiodistal direction, the width of the overlapping part of the third reinforcing ridges 221 and the fourth reinforcing ridges 222 in the mesiodistal direction is less than or equal to 1 / 2 of the width of the third reinforcing ridges 221 in the mesiodistal direction. For example, referring specifically to FIG. 14, line R’ is a boundary line parallel to the buccal-lingual direction passing through the most distal point of the third reinforcing ridge 221 in the mesial direction, line R is a boundary line parallel to the buccal-lingual direction passing through the most distal point of the fourth reinforcing ridge 222 in the mesial direction, and the shaded part F in the figure is the overlapping part of the third reinforcing ridge 221 and the fourth reinforcing ridge 222, and the width h3 of the overlapping part in the mesiodistal direction is less than or equal to 1 / 2 of the width H3 of the fourth reinforcing ridge 222 in the mesiodistal direction.

[0068] In other embodiments, when the projections of the adjacent third reinforcing ridge 221 and fourth reinforcing ridge 222 in the sagittal plane partially overlap, in order to further increase the ultimate load of the occlusal surface of the second raised portion 22, i.e. the less the projections of the adjacent third reinforcing ridge 221 and fourth reinforcing ridge 222 in the sagittal plane overlap, the greater the ultimate load of the occlusal surface of the second raised portion 22. Therefore, under the premise that the overlapping part of the projections of the adjacent third reinforcing ridge 221 and fourth reinforcing ridge 222 in the sagittal plane is as small as possible, and the third reinforcing ridge 221 and fourth reinforcing ridge 222 have a sufficient number on both sides of the second raised portion 22 to ensure the deformation resistance of the second raised portion 22 in the mesial-distal direction, the width of the overlapping part of the fourth reinforcing ridge 222 and the third reinforcing ridge 221 in the mesial-distal direction is less than or equal to 1 / 2 of the width of the fourth reinforcing ridge 222 in the mesial-distal direction. For example, with reference to FIG. 15, in which line R' is a boundary line parallel to the buccal-lingual direction passing through the most distal point of the third reinforcing ridge 221 in the mesial direction, line R is a boundary line parallel to the buccal-lingual direction passing through the most distal point of the fourth reinforcing ridge 222 in the mesial direction, and the shaded part G is the overlapping part of the third reinforcing ridge 221 and the fourth reinforcing ridge 222, the width h4 of the overlapping part in the mesial-distal direction is less than or equal to 1 / 2 of the width H4 of the third reinforcing ridge 221 in the mesial-distal direction.

[0069] In some embodiments, as shown in FIG. 16, the projections of the third reinforcing ridge 221 and the fourth reinforcing ridge 222 on the sagittal plane do not overlap. That is, the third reinforcing ridge 221 and the fourth reinforcing ridge 222 are completely staggered in the buccolingual direction. In some embodiments, the shortest distance between the third reinforcing ridge 221 and the contour edge where the fourth reinforcing ridge 222 is located is the third distance L3, and the shortest distance between the fourth reinforcing ridge 222 and the contour edge where the third reinforcing ridge 221 is located is the fourth distance L4. The difference between any one third distance and any one fourth distance is within a predetermined range, wherein the predetermined range is 0-4 mm, and the difference between any one third distance and any one fourth distance can be 0 mm or 2 mm or 4 mm. The optimal embodiment is that the difference between any one third distance and any one fourth distance is 0 mm. However, since the width of the second protruding portion 22 in the buccolingual direction needs to be as small as possible, it is generally less than or equal to the buccolingual width of the occlusal surface of the tooth where it is located. Therefore, the width of the second protruding portion 22 in the buccolingual direction is not completely equal in general. However, in order to ensure that the occlusal surface of the second protruding portion 22 does not have a problem of stress concentration due to excessive local width, the difference between any one third distance L3 and any one fourth distance L4 in the present embodiment is within a predetermined range, which can ensure that the difference between the corresponding buccolingual width at any one third reinforcing ridge 221 and the corresponding buccolingual width at any one fourth reinforcing ridge 222 on the occlusal surface of the second protruding portion 22 is not too large. Therefore, the second protruding portion 22 at the third reinforcing ridge 221 or the fourth reinforcing ridge 222 does not have a problem of local extreme load being too small, and stress concentration and local deformation are avoided.

[0070] In some embodiments, all adjacent third reinforcing ridges 221 and fourth reinforcing ridges 222 are staggered in the buccolingual direction. This further ensures that the difference between the width of the occlusal surface of the second protruding portion 22 in the buccolingual direction is not too large when multiple third reinforcing ridges 221 and multiple fourth reinforcing ridges 222 are provided on both sides of the second protruding portion 22. This avoids the problem of local extreme load being too small, stress concentration, and further local deformation, which affects the treatment effect of the shell-shaped aligner.

[0071] In some embodiments, the mesial surface of the first protruding portion 12 and the distal surface of the second protruding portion 22 are parallel to each other. When the mesial surface of the first protruding portion 12 and the distal surface of the second protruding portion 22 are planes, the mesial surface of the first protruding portion 12 or the distal surface of the second protruding portion 22 is arranged at an angle with the buccolingual direction at the corresponding position, and the angle is between 30°-75° or 105°-150°.

[0072] In some embodiments, the mesial surface of the first protrusion 12 and the distal surface of the second protrusion 22 are parallel to each other. In some embodiments, the mesial surface of the first protrusion 12 and the distal surface of the second protrusion 22 are curved surfaces parallel to each other. In some embodiments, the mesial surface of the first protrusion 12 and the distal surface of the second protrusion 22 are curved surfaces parallel to each other, and the mesial surface of the first protrusion 12 is provided with a convex or concave reinforcing structure, and the reinforcing structure is matched with the convexity or concavity of the distal surface of the second protrusion 22. In some embodiments, the mesial surface of the first protrusion 12 and the distal surface of the second protrusion 22 are curved surfaces parallel to each other, and the mesial surface of the first protrusion 12 is provided with a convex or concave reinforcing structure, and the reinforcing structure is matched with the convexity or concavity of the distal surface of the second protrusion 22, and the tangent line at the highest point of the mesial surface of the first protrusion 12 or the tangent line at the highest point of the distal surface of the second protrusion 22 is arranged at an angle with the buccolingual direction at the corresponding position, and the angle is between 30°-75° or 105°-150°.

[0073] In some embodiments, the first shell-shaped body 10 has a left first protrusion 12 and a right first protrusion 12, and the distal surface of the left first protrusion 12 and the distal surface of the right first protrusion 12 are axially symmetrical about the dental midline. The second shell-shaped body 20 has a left second protrusion 22 and a right second protrusion 22, and the distal surface of the left second protrusion 22 and the distal surface of the right second protrusion 22 are axially symmetrical about the dental midline.

[0074] For example, when the first shell-shaped body 10 and the second shell-shaped body 20 are used together, the left first protrusion 12 and the left second protrusion 22, and the right first protrusion 12 and the right second protrusion 22 are matched. The mesial surface of the left first protrusion 12 and the distal surface of the left second protrusion 22 are parallel to each other, and the angle between the buccolingual direction at the corresponding position of the mesial surface of the left first protrusion 12 and the distal surface of the left second protrusion 22 is between 30°-75°; the mesial surface of the right first protrusion 12 and the distal surface of the right second protrusion 22 are parallel to each other, and the angle between the buccolingual direction at the corresponding position of the mesial surface of the right first protrusion 12 and the distal surface of the right second protrusion 22 is between 105°-150°. The advantage of such arrangement is that by designing the angle of the inclined surface of the left and right first protrusion 12 and the second protrusion 22, the movement of the left and right mandibles can be restricted by the first protrusion 12 and the second protrusion 22. The forward limit of the mandible is achieved, and the left and right malocclusion deviation does not occur during the treatment process, which plays a good positioning role.

[0075] The "left" and "right" direction descriptions in this application only represent the position in the figure, and not the actual position of the shell-shaped appliance in use.

[0076] In some embodiments, referring to FIG. 13, the second protruding part 22 is located at the position corresponding to the No. 4 tooth. The length of the second protruding part 22 in the mesial-distal direction is equal to the length of the No. 4 tooth in the mesial-distal direction. In the use of the shell-shaped appliance in the present application, the first protruding part 12 and the second protruding part 22 work together to move the mandible forward. The second protruding part 22 mainly serves as the stress receiving part for moving the mandible forward. The size of the second protruding part 22 only covers the No. 4 tooth. A smaller size can make the movement of the mandible more flexible, and at the same time, can avoid the deformation of the second protruding part 22 when it is stressed. Of course, the second protruding part 22 can also be located between the positions corresponding to the No. 3 tooth and the No. 4 tooth. Generally, this is the position of the deepest Spee curve. The advantage of this setting is that the shell-shaped appliance in the present embodiment can ensure the occlusal stability of the shell-shaped appliance when it is worn, because the deepest position of the patient's Spee curve will not be suspended.

[0077] In some embodiments, the length of the first protruding part 12 in the mesial-distal direction is greater than the length of the second protruding part 22 in the mesial-distal direction. In order to make the support force of the first protruding part 12 and the second protruding part 22 in the occlusal direction more uniform and stable during the use of the shell-shaped appliance, the maximum width of the auxiliary support part on the first protruding part 12 in the mesial-distal direction is greater than the maximum width of the auxiliary support part on the second protruding part 22 in the mesial-distal direction.

[0078] In some embodiments, the occlusal surfaces of the first protruding part 12 and the second protruding part 22 have occlusal mark structures that match the occlusal surfaces of the opposite teeth at the target occlusal position.

[0079] Embodiment Three

[0080] The present embodiment provides a treatment system, which comprises a plurality of shell-shaped appliances as described in Embodiment Two, and the plurality of shell-shaped appliances correspond to a plurality of successive treatment steps, respectively. The sagittal jaw target positions corresponding to the plurality of shell-shaped appliances are consistent. The reconstruction of the jaw position refers to the change of the relative position relationship between the upper and lower jaws, and the upper and lower jaws are kept at the target position. Therefore, the sagittal reconstruction of the jaw position needs to keep the upper and lower jaws at the same sagittal position through a plurality of shell-shaped appliances, so as to reconstruct the muscle memory. The patient can complete the sagittal reconstruction of the jaw position by wearing a plurality of shell-shaped appliances, and the plurality of shell-shaped appliances can also synchronously complete the gradual alignment of the teeth, so that the orthodontic treatment is completed synchronously, and the treatment time is shortened.

[0081] In some embodiments, the protruding heights of the first protruding part and the second protruding part of the shell-shaped appliance corresponding to different treatment stages in the direction of the opposite jaw are associated with the treatment stages.

[0082] With reference to FIG. 17, the protrusion height of the first protrusion 12 and the second protrusion 22 of the plurality of sets of shell aligners gradually decreases in the protrusion direction towards the opposite jaw as the treatment progresses. This arrangement has the advantage of gradually flattening the dentition to the target state and assisting the gradual elevation of the teeth in the posterior region. With reference to at least two of the plurality of sets of shell aligners shown in FIG. 17, the shell aligner 200 is a shell aligner that is required for use in a subsequent treatment step of the shell aligner 100, wherein the height of the first protrusion 12 and the height of the second protrusion 22 of the shell aligner 200 are less than the height of the first protrusion 12 and the height of the second protrusion 22 of the shell aligner 100.

[0083] Embodiment Four

[0084] An embodiment of the present application provides a treatment system comprising N shell aligners to be worn on a single jaw, the N shell aligners being arranged in N successive treatment steps, each of the N shell aligners being capable of repositioning teeth from an initial arrangement of the corresponding treatment step to a target arrangement of the corresponding treatment step, wherein at least M of the N shell aligners are shell aligners as in Embodiment 1, the M shell aligners corresponding to M successive treatment steps, M being greater than or equal to 2 and less than or equal to N. The M shell aligners can be in the initial stage, or in the intermediate stage, or in the final stage of the treatment system, which can be determined by the specific arrangement in the treatment plan.

[0085] In some embodiments, the positions or sizes of the maximum buccolingual width of the first protrusions on at least two of the M shell aligners are inconsistent. For example, referring to FIG. 19, in some embodiments, the at least two of the M shell aligners are shell aligner 300 and shell aligner 400. The maximum buccolingual width of the first protrusion 12 on the shell aligner 300 is width Q1 near the anterior tooth area, and the maximum buccolingual width of the first protrusion 12 on the shell aligner 400 is width Q2 near the posterior tooth area. The reason for such arrangement is that, in order to improve the situation that the corresponding M first protrusions in the M steps of the treatment process are not easily deformed by biting, and to avoid interruption of the treatment, the positions or sizes of the maximum buccolingual width of the first protrusions need to be adjusted in different steps according to different situations, with the purpose of avoiding the situation that the maximum occlusal force area is the minimum load limit of the first protrusion, so that the first protrusion is easily deformed by biting. Therefore, in the design process, the maximum buccolingual width of the first protrusion is avoided from the maximum occlusal force area of the posterior tooth area of the patient, and in the treatment process, the maximum occlusal force area of the posterior tooth area of the patient may change, that is, the positions or sizes of the maximum buccolingual width of the M first protrusions also need to change. In some embodiments, the positions or sizes of the maximum buccolingual width of the first protrusions are adjusted by adjusting the positions or sizes of the first reinforcing ridges and the second reinforcing ridges on different first protrusions.

[0086] Embodiment five

[0087] Referring to FIG. 20, the present embodiment provides a dental arch model used as a mold for forming a shell-shaped dental aligner by hot pressing film, comprising a dental arch model body 1000, a first protrusion solid model 1012 for reconstructing the occlusal position of the upper and lower jaws is provided on the posterior occlusal surface of the dental arch model body 1000 in the direction of the opposite jaw, the buccal side of the first protrusion solid model 1012 has a first reinforcing ridge solid model 1111, the first reinforcing ridge solid model 1111 is formed by extending inwardly and concavely from the buccal side of the first protrusion solid model 1012, the lingual side of the first protrusion solid model 1012 has a second reinforcing ridge solid model 1112, the second reinforcing ridge solid model 1112 is formed by extending inwardly and concavely from the lingual side of the first protrusion solid model 1012, wherein at least two adjacent first reinforcing ridge solid models 1111 and second reinforcing ridge solid models 1112 are arranged in a staggered manner in the buccolingual direction.

[0088] In some embodiments, the dental arch body comprises a tooth part 1001 and a support part 1002, the tooth part 1001 has a tooth layout in the same arrangement as the target tooth layout of the patient, and the support part 1002 is located at the bottom of the tooth part 1001 and is used to provide support for the tooth part 1001 during the hot pressing process. The first protruding part solid model 1012 is arranged on the occlusal surface of the posterior tooth area of the tooth part 1001 between tooth No. 3 and tooth No. 7. In some embodiments, the first protruding part solid model 1012 is located on the left side and / or the right side of the tooth part 1001. The buccal side of the first protruding part solid model 1012 extends inwardly and concavely to form a first reinforcing ridge solid model 1111, and the lingual side of the first protruding part solid model 1012 extends inwardly and concavely to form a second reinforcing ridge solid model 1112. The arrangement of the first reinforcing ridge and the second reinforcing ridge on the first protruding part in the arrangement and embodiments of the first reinforcing ridge and the second reinforcing ridge is consistent with the arrangement of the third reinforcing ridge and the fourth reinforcing ridge in Embodiment Two, which will not be described here.

[0089] Embodiment Six

[0090] This embodiment provides a design method of a digital dental arch model, as shown in FIG. 21.

[0091] Step 101, obtaining a basic digital dental arch model and a protruding part height.

[0092] Generally, a three-dimensional model of the current tooth layout of the patient is obtained according to the oral scanning data or the plaster model, and then the three-dimensional model of the current tooth is adjusted according to the treatment plan to obtain the basic digital dental arch model, that is, the tooth layout under the stage target.

[0093] The protruding part height can be obtained according to the target relative position relationship of the upper and lower jaws set by the doctor in the clinic, or can be calculated according to the target relative position relationship of the three-dimensional digital model of the upper and lower jaws.

[0094] Step 102, generating a first protruding part digital model of the reconstructed upper and lower jaw occlusion position in the specified area of the occlusal surface of the posterior tooth area of the basic digital dental arch model according to the basic digital dental arch model and the protruding part height; wherein the buccal side of the first protruding part digital model has a first reinforcing ridge that is inwardly concave, the lingual side of the first protruding part has a second reinforcing ridge that is inwardly concave, and at least two adjacent first reinforcing ridges and second reinforcing ridges are arranged in a staggered manner in the buccal-lingual direction.

[0095] In some embodiments, according to the base digital dental arch model and the height of the protrusion, a first protrusion digital model of the reconstructed upper and lower jaw bite position is generated in a designated area of the occlusal surface of the posterior tooth region of the base digital dental arch model, including: obtaining the occlusal surface morphology and size of the tooth model in the designated area of the occlusal surface of the posterior tooth region of the base digital dental arch model; according to the height of the protrusion and the occlusal surface morphology and size of the tooth model, a first protrusion digital model is generated in the designated area of the occlusal surface of the posterior tooth region of the base digital dental arch model.

[0096] In some embodiments, a preset initial protrusion model corresponding to the first protrusion digital model is obtained, the preset initial protrusion model is obtained from a model library by an operator, and the preset initial protrusion model has a quadrangular prism structure. A region corresponding to the teeth on the occlusal surface of the posterior tooth region of the base digital dental arch model is selected as a designated area for generating the first protrusion model, and then the morphology and size of the initial protrusion model are adjusted according to the occlusal surface morphology and size of the tooth model in the designated area to obtain the first protrusion digital model, including adjusting the height of the initial protrusion model in the gingival arch direction according to the protrusion height, and then adjusting the surface morphology of the initial protrusion model located in the designated area according to the occlusal surface morphology of the tooth model in the designated area, so that the surface morphology of the initial protrusion model located in the designated area matches the concave-convex of the occlusal surface of the tooth in the designated area. In some embodiments, the surface of the initial protrusion model opposite to the surface located in the designated area (i.e. the surface adjacent to the opposite jaw) can be set as a surface parallel to the horizontal plane or the occlusal plane, or a surface matching the concave-convex of the occlusal surface of the opposite tooth.

[0097] In some embodiments, adjusting the size of the initial protrusion model according to the occlusal surface size of the tooth model in the designated area includes adjusting the width of the initial protrusion model in the buccal-lingual direction, so that the width of the surface of the initial protrusion model located in the designated area in the buccal-lingual direction is less than or equal to the width of the corresponding occlusal surface of the tooth in the buccal-lingual direction in the designated area.

[0098] In some embodiments, adjusting the morphology and size of the initial protrusion model according to the occlusal surface morphology and size of the tooth model to obtain the first protrusion digital model further includes: obtaining the size and morphology of the first reinforcing ridge and the second reinforcing ridge respectively, and generating the first protrusion digital model with the first reinforcing ridge and the second reinforcing ridge on the side surface of the adjusted initial protrusion model according to the size and morphology of the first reinforcing ridge and the second reinforcing ridge. Adjacent first reinforcing ridges and second reinforcing ridges are arranged in a staggered manner.

[0099] In some embodiments, the method further comprises: obtaining the occlusal surface of the tooth model in the designated area of the posterior occlusal surface of the base digital dental model as the lower surface of the initial protrusion model, or obtaining the occlusal surface of the antagonistic tooth model in the designated area as the upper surface of the initial protrusion model, or copying the lower surface and taking the surface obtained by copying the lower surface as the upper surface of the initial protrusion model, then generating the side surface of the initial protrusion model according to the upper surface and the lower surface, and finally generating the initial protrusion model with the upper surface, the lower surface and the side surface.

[0100] In some embodiments, the method of obtaining the occlusal surface of the tooth model in the designated area of the posterior occlusal surface of the base digital dental model as the lower surface of the initial protrusion model comprises: obtaining the two most distal points on the occlusal surface of the tooth model in the designated area of the posterior occlusal surface in the buccal direction, which are taken as two control points of each tooth. Finally, uniform interpolation is performed between all the obtained control points to obtain the boundary of the lower surface grid of the initial protrusion model; wherein the parameters such as the interval of uniform interpolation can be adaptively adjusted according to actual conditions. After obtaining the boundary of the lower surface grid, the grid inside the boundary box can be filled to obtain the lower surface of the initial protrusion model.

[0101] Similarly, the upper surface of the initial protrusion model can be obtained by copying the upper surface, or by obtaining the occlusal surface of the antagonistic tooth model in the designated area as the upper surface of the initial protrusion model. In some embodiments, the method of obtaining the upper surface of the initial protrusion model comprises: obtaining the two most distal points on the occlusal surface of the antagonistic tooth model in the designated area of the posterior occlusal surface in the buccal direction, which are taken as two control points of each tooth. Finally, uniform interpolation is performed between all the obtained control points to obtain the boundary of the upper surface grid of the initial protrusion model; wherein the parameters such as the interval of uniform interpolation can be adaptively adjusted according to actual conditions. After obtaining the boundary of the upper surface grid, the grid inside the boundary box can be filled to obtain the upper surface of the initial protrusion model.

[0102] In some embodiments, generating the side surface of the initial relief model according to the upper surface and the lower surface further comprises generating the side surface of the initial relief model after scaling the upper surface and / or the lower surface, wherein the scaling ratio is between 0.5 and 0.9. In some embodiments, the scaling method comprises that the area corresponding to each tooth on the edge of the lower surface of the initial relief model has two control points in the buccolingual direction, and the scaling of the lower surface is completed according to the adjustment of the positions of the control points on the occlusal surface of the corresponding tooth. Similarly, the area corresponding to each tooth on the edge of the upper surface of the initial relief model has two control points in the buccolingual direction, and the scaling of the upper surface is completed according to the adjustment of the positions of the control points on the occlusal surface of the corresponding tooth. The width of the initial relief model in the buccolingual direction after scaling is smaller than the width of the occlusal surface of the tooth at the corresponding position in the specified area in the buccolingual direction, so that the first relief digital model can be supported on the occlusal surface of the tooth.

[0103] Step 103: merging the basic digital dental model and the first relief digital model to generate a digital dental model with relief.

[0104] The basic digital dental model and the first relief digital model are merged by Boolean operation to generate a digital dental model with relief. The acquisition process is simple and direct, and the composite model of the basic digital dental model and the first relief digital model can be quickly obtained.

[0105] In some embodiments, the first relief digital model can be directly generated from the basic digital dental model, which is also included in the protection scope of the present step.

[0106] Embodiment Seven

[0107] The present embodiment provides a method for generating a shell-shaped appliance. In some embodiments, the physical model of the digital dental model obtained by the design method of the digital dental model in Embodiment Six is manufactured by additive manufacturing, which can also be referred to as 3D printing. Additive manufacturing is a manufacturing technology that integrates computer-aided design, material processing and forming technology, and is based on digital model files. Special metal materials, non-metal materials and medical biological materials are used to manufacture physical objects by means of extrusion, sintering, melting, light curing, spraying and other methods through software and numerical control system. Then, the shell-shaped appliance is manufactured by hot stamping film according to the physical model.

[0108] In some other embodiments, the digital dental arch model obtained by the method for designing a digital dental arch model according to Embodiment Six is used to generate a digital model of a shell-shaped appliance, the digital model of the shell-shaped appliance is a negative mold of the digital dental arch model and has a certain thickness, generally between 0.5mm and 1.5mm. Then the shell-shaped appliance is manufactured by using an additive manufacturing method according to the digital model of the shell-shaped appliance.

[0109] It is worth mentioning that each module involved in the embodiment is a logical module. In actual application, a logical 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 application, units not closely related to solving the technical problems proposed in the present application are not introduced in the embodiment, but this does not mean that there are no other units in the embodiment.

[0110] One embodiment of the present application relates to an electronic device, as shown in FIG. 22, comprising at least one processor 1101; and,

[0111] a memory 1102 connected in communication with the at least one processor 1101; wherein,

[0112] The memory 1102 stores instructions executable by the at least one processor 1101, and the instructions are executed by the at least one processor 1101 to enable the at least one processor 1101 to execute the method for designing a digital dental arch model or the method for generating a shell-shaped appliance.

[0113] The memory and the processor are connected by a bus, which can 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 peripheral devices, voltage regulators and power management circuits, etc., which are well known in the art, and therefore, will not be 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, which provide a unit for communicating with various other devices on the transmission medium. The data processed by the processor is transmitted on the wireless medium through the antenna, and further, the antenna also receives data and transmits the data to the processor.

[0114] The processor is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interface, voltage regulation, power management and other control functions. And the memory can be used to store the data used by the processor in the execution operation.

[0115] One embodiment of the present application relates to a computer readable storage medium storing a computer program. The computer program is executed by a processor to implement the method embodiments.

[0116] That is, those skilled in the art can understand that all or part of the steps in the above-mentioned method embodiments can be completed by instructing the relevant hardware through a program, the program is stored in a storage medium, and includes a plurality of instructions to make a device (which can be a single-chip microcomputer, a chip, etc.) or a processor execute all or part of the steps of the method described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0117] It should be noted that the above embodiments can be freely combined as needed to form different new embodiments without producing contradictions, and such combined embodiments are within the protection scope of the present application. In order to save the length of the application text, the details are not described here.

[0118] The above is only a specific embodiment of the present application, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered within the protection scope of the present application.

[0119] Similarly, the above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, and all of these should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A shell aligner comprising a shell body for receiving teeth, the shell body being a unitary structure, wherein: The shell-shaped body is provided with a first protruding part for reconstructing the upper and lower occlusal position in the occlusal surface of the posterior region in the direction of the opposite jaw, the buccal side of the first protruding part has a first reinforcing ridge for improving the deformation resistance of the first protruding part, the first reinforcing ridge is formed by inwardly recessing the buccal side of the first protruding part, the lingual side of the first protruding part has a second reinforcing ridge for improving the deformation resistance of the first protruding part, the second reinforcing ridge is formed by inwardly recessing the lingual side of the first protruding part, wherein at least two adjacent first reinforcing ridges and second reinforcing ridges are arranged in the buccal-lingual direction.

2. The shell aligner of claim 1, wherein, The projections of the adjacent first reinforcing ridges and second reinforcing ridges in the sagittal plane partially overlap.

3. The shell aligner of claim 2, wherein, The width of the overlapping part of the first reinforcing ridge and the second reinforcing ridge in the mesiodistal direction is less than or equal to 1 / 2 of the width of the first reinforcing ridge in the mesiodistal direction; and / or, the width of the overlapping part of the second reinforcing ridge and the first reinforcing ridge in the mesiodistal direction is less than or equal to 1 / 2 of the width of the second reinforcing ridge in the mesiodistal direction.

4. The shell aligner of claim 1, wherein, The projections of the adjacent first reinforcing ridges and second reinforcing ridges in the sagittal plane do not overlap.

5. The shell aligner of claim 4, wherein, The shortest distance between the contour edges where the first reinforcing ridges and the second reinforcing ridges are located is a first distance, the shortest distance between the contour edges where the second reinforcing ridges and the first reinforcing ridges are located is a second distance, and the difference between any one of the first distances and any one of the second distances is within a predetermined range, wherein the predetermined range is 0-4mm.

6. The shell aligner of claim 1, wherein, All adjacent first reinforcing ridges and second reinforcing ridges are arranged in the buccal-lingual direction.

7. The shell aligner of any one of claims 1-6, wherein, The first reinforcing ridges and the second reinforcing ridges are consistent in shape and size.

8. The shell aligner of any one of claims 1-6, wherein, The first reinforcing ridges and the second reinforcing ridges each have a plurality, and the number of the first reinforcing ridges is consistent with the number of the second reinforcing ridges.

9. The shell aligner of claim 8, wherein, The plurality of first reinforcing ridges and the plurality of second reinforcing ridges are arranged in the mesiodistal direction in sequence.

10. The shell aligner of any one of claims 1-6, wherein, The depth value of the inward recess of the first reinforcing ridge and / or the second reinforcing ridge is between 1 / 4-1 / 3 of the average width value of the first protruding part in the buccal-lingual direction.

11. The shell aligner of claim 10, wherein, The depth value of the inward recess of the first reinforcing ridge or the second reinforcing ridge is between 1.0mm-2.0mm.

12. The shell aligner of claim 1, wherein, The width of the first reinforcing ridge in the mesiodistal direction gradually decreases from the buccal side to the lingual side; and / or, the width of the second reinforcing ridge in the mesiodistal direction gradually decreases from the lingual side to the buccal side.

13. The shell aligner of claim 12, wherein, The maximum width value of the first reinforcing ridge in the mesiodistal direction is between 2.0mm-3.0mm; the maximum width value of the second reinforcing ridge in the mesiodistal direction is between 2.0mm-3.0mm.

14. The shell aligner of claim 1, wherein, When worn, the first protruding part is supported on the occlusal surface of the teeth of the ipsilateral jaw adjacent to the lower contour edge of the ipsilateral jaw; the first protruding part is supported on the occlusal surface of the teeth of the opposite jaw adjacent to the upper contour edge of the opposite jaw; the first reinforcing ridges and the second reinforcing ridges respectively penetrate the upper contour edge and the lower contour edge.

15. A shell aligner, wherein: The first shell body includes a first protrusion part for moving the lower jaw in the sagittal direction, and the second shell body includes a second protrusion part for moving the lower jaw in the sagittal direction, the mesial surface of the first protrusion part and the distal surface of the second protrusion part interact with each other to move the lower jaw in the sagittal direction to a target occlusal position.

16. The shell aligner of claim 15, wherein, The buccal surface of the second protrusion part has a third reinforcing ridge for improving the deformation resistance of the second protrusion part, the third reinforcing ridge is formed by inwardly recessing the buccal surface of the second protrusion part, the lingual surface of the second protrusion part has a fourth reinforcing ridge for improving the deformation resistance of the second protrusion part, the fourth reinforcing ridge is formed by inwardly recessing the lingual surface of the second protrusion part, wherein at least two adjacent third reinforcing ridges and fourth reinforcing ridges are arranged in a staggered manner in the buccal-lingual direction.

17. The shell aligner of claim 16, wherein, The projections of the adjacent third reinforcing ridges and fourth reinforcing ridges in the sagittal plane partially overlap or do not overlap.

18. The shell aligner of claim 17, wherein, The shortest distance between the third reinforcing ridges and the contour edges where the third reinforcing ridges are located is a third distance, the shortest distance between the fourth reinforcing ridges and the contour edges where the fourth reinforcing ridges are located is a fourth distance, the difference between any one third distance and any one fourth distance is within a predetermined range, wherein the predetermined range is 0-4mm.

19. The shell aligner of claim 15, wherein, The mesial surface of the first protrusion part and the distal surface of the second protrusion part are parallel to each other.

20. The shell aligner of claim 19, wherein, When the mesial surface of the first protrusion part and the distal surface of the second protrusion part are planes, the mesial surface of the first protrusion part or the distal surface of the second protrusion part is arranged at an angle with the buccal-lingual direction at the corresponding position, and the angle is between 30°-75° or 105°-150°.

21. The shell aligner of claim 19, wherein, When the mesial surface of the first protrusion part and the distal surface of the second protrusion part are curved surfaces, the tangent line at the highest point of the mesial surface of the first protrusion part or the tangent line at the highest point of the distal surface of the second protrusion part is arranged at an angle with the buccal-lingual direction at the corresponding position, and the angle is between 30°-75° or 105°-150°.

22. The shell aligner of claim 15, wherein, The first shell body has a left first protrusion part and a right first protrusion part, the distal surface of the left first protrusion part is axially symmetrical to the distal surface of the right first protrusion part about the dental midline, and / or the second shell body has a left second protrusion part and a right second protrusion part, the distal surface of the left second protrusion part is axially symmetrical to the distal surface of the right second protrusion part about the dental midline.

23. An orthodontic system wherein, The shell aligner includes a plurality of groups of shell aligners as claimed in any one of claims 15-22, and each group of shell aligners corresponds to a plurality of successive treatment steps, wherein the target positions of the plurality of groups of shell aligners in the sagittal direction are consistent.

24. The treatment system according to claim 23, wherein, The protrusion heights of the first protrusion parts and the second protrusion parts on the shell aligners corresponding to different treatment stages are associated with the treatment stages.

25. The treatment system according to claim 24, wherein, The protruding height of the first protrusion and the second protrusion provided on the shell-shaped aligner gradually decreases along with the treatment process.

26. An orthodontic system comprising N shell-like orthodontic appliances to be worn on a single jaw, wherein, The N shell-shaped aligners correspond to N successive treatment steps, and each of the N shell-shaped aligners can reposition teeth from an initial layout of a corresponding treatment step to a target layout of the corresponding treatment step, wherein at least M of the N shell-shaped aligners are the shell-shaped aligner of any one of claims 1-14, and the M shell-shaped aligners correspond to M successive treatment steps, M is greater than or equal to 2 and less than or equal to N.

27. The treatment system according to claim 26, wherein, The first protrusion on at least two of the M shell-shaped aligners is different in position or size of the maximum width in the buccal-lingual direction.

28. A dental cast for use as a mold for thermoforming a shell-like dental appliance, comprising a dental cast body, wherein, The occlusal surface of the dental model body is provided with a first protrusion entity model for reconstructing the upper and lower jaw occlusion position, the buccal side of the first protrusion entity model has a first reinforcing ridge entity model, the first reinforcing ridge entity model is formed by the buccal side of the first protrusion entity model extending inwardly, the lingual side of the first protrusion entity model has a second reinforcing ridge entity model, the second reinforcing ridge entity model is formed by the lingual side of the first protrusion entity model extending inwardly, wherein at least two adjacent first reinforcing ridge entity models and second reinforcing ridge entity models are arranged in a staggered manner in the buccal-lingual direction.

29. A design method of a digital dental model, wherein: obtaining a basic digital dental model and a protrusion height; generating a first protrusion digital model for reconstructing the upper and lower jaw occlusion position in a specified area of the occlusal surface of the posterior tooth region of the basic digital dental model according to the basic digital dental model and the protrusion height; wherein the buccal side of the first protrusion digital model has a first reinforcing ridge inwardly recessed, the lingual side of the first protrusion has a second reinforcing ridge inwardly recessed, and at least two adjacent first reinforcing ridges and second reinforcing ridges are arranged in a staggered manner in the buccal-lingual direction; merging the basic digital dental model and the first protrusion digital model to generate a digital dental model with protrusion.

30. The method of designing a digitized dental model according to claim 29, wherein, The first protrusion digital model for reconstructing the upper and lower jaw occlusion position in a specified area of the occlusal surface of the posterior tooth region of the basic digital dental model according to the basic digital dental model and the protrusion height, comprises: obtaining the occlusal surface shape and size of the tooth model in the specified area of the occlusal surface of the posterior tooth region of the basic digital dental model; generating a first protrusion digital model in the specified area of the occlusal surface of the posterior tooth region of the basic digital dental model according to the protrusion height and the occlusal surface shape and size of the tooth model.

31. The method of designing a digitized dental model according to claim 30, wherein, The first protrusion digital model for reconstructing the upper and lower jaw occlusion position in a specified area of the occlusal surface of the posterior tooth region of the basic digital dental model according to the basic digital dental model and the protrusion height, comprises: obtaining a preset initial protrusion model corresponding to the first protrusion digital model; Adjusting the shape and size of the initial protrusion model according to the shape and size of the occlusal surface of the dental model to obtain the first protrusion digital model.

32. The method of designing a digitized dental model according to claim 31, wherein, The adjusting the shape and size of the initial protrusion model according to the shape and size of the occlusal surface of the dental model to obtain the first protrusion digital model comprises: Respectively acquiring the size and shape of the first reinforcing ridge and the second reinforcing ridge, and generating the first protrusion digital model with the first reinforcing ridge and the second reinforcing ridge on the side surface of the adjusted initial protrusion model according to the size and shape of the first reinforcing ridge and the second reinforcing ridge.

33. The method of designing a digitized dental model according to claim 29, wherein, The generating the first protrusion digital model for reconstructing the upper and lower occlusal position in the designated area of the occlusal surface of the posterior tooth region of the basic digital dental arch model according to the basic digital dental arch model and the protrusion height comprises: Acquiring the occlusal surface of the dental model in the designated area of the occlusal surface of the posterior tooth region of the basic digital dental arch model as the lower surface of the initial protrusion model, acquiring the occlusal surface of the opposite dental model in the designated area as the upper surface of the initial protrusion model, or copying the lower surface and taking the surface obtained by copying the lower surface as the upper surface of the initial protrusion model; Generating the side surface of the initial protrusion model according to the upper surface and the lower surface; Generating the initial protrusion model according to the upper surface, the lower surface and the side surface; Respectively acquiring the size and shape of the first reinforcing ridge and the second reinforcing ridge, and generating the first protrusion digital model with the first reinforcing ridge and the second reinforcing ridge on the side surface of the initial protrusion model according to the size and shape of the first reinforcing ridge and the second reinforcing ridge.

34. The method of designing a digitized dental model according to claim 33, wherein, The generating the side surface of the initial protrusion model according to the upper surface and the lower surface further comprises generating the side surface of the initial protrusion model after scaling the upper surface and / or the lower surface, wherein the scaling ratio is between 0.5 and 0.

9.

35. A method of generating a shell aligner, wherein, Manufacturing the physical model of the digital dental arch model obtained by the design method of the digital dental arch model according to any one of claims 29-34 by additive manufacturing, manufacturing the shell-shaped appliance according to the physical model by hot stamping film, or generating the digital model of the shell-shaped appliance according to the digital dental arch model obtained by the design method of the digital dental arch model according to any one of claims 29-34, and manufacturing the shell-shaped appliance by additive manufacturing according to the digital model of the shell-shaped appliance.

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