Dental jaw model, orthodontic appliance, jaw pad generation method, equipment and medium

Abstract

The embodiment of the invention relates to the technical field of orthodontic digital design, and discloses a dental model, appliance and jaw pad generation method, equipment and medium. The method comprises the following steps: according to the height of a jaw pad and a dental three-dimensional digital model, generating at least two lug bosses at specified positions of the dental three-dimensional digital model; supporting bodies connected with the two protruding parts respectively are generated between the two protruding parts of the tooth jaw three-dimensional digital model according to the height of the jaw pad, and the supporting bodies are provided with curved surfaces protruding towards the opposite jaw of the tooth jaw three-dimensional digital model; and combining the dental three-dimensional digital model, the lug boss and the support body to generate the dental three-dimensional digital model with the jaw pad. By means of the structure, a pressure load can be converted into plane internal stress when the jaw pad is subjected to the pressure load, small plane external stress is achieved, the occlusal pressure intensity of the jaw pad position is improved, and meanwhile buckling deformation is not prone to occurring compared with an existing form.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of orthodontic digital design, and particularly to a method, device, and medium for generating a dental model, an orthodontic appliance, and a occlusal splint. Background Art

[0002] A shell-shaped dental orthodontic appliance is a dental orthodontic device made of a safe elastic transparent polymer material, which has the advantages of being completely invisible during the correction process, good aesthetics, simple operation, and easy oral cleaning, and has gradually become the first choice for dental orthodontic patients. During the application of the shell-shaped dental orthodontic appliance, in order to specifically design the force application position or form, it is usually necessary to combine accessories for correction. The occlusal splint added to the occlusal surface of the teeth is a common accessory, which is widely used and can open the occlusion, contact the occlusal interference, adjust the jaw position, etc.

[0003] In the prior art, the occlusal splint integrated with the orthodontic appliance formed by thermoforming has the characteristics of convenient manufacturing and good integrity. When the patient wears the orthodontic appliance and bites, the occlusal surface of the occlusal splint tends to deform under the pressure during occlusion, resulting in the collapse or flattening of the occlusal splint. Moreover, the occlusal action is relatively frequent, which increases the probability of damaging the occlusal splint. Therefore, the anti-deformation ability of the occlusal splint has always been a technical problem to be solved.

[0004] The inventors found that there are at least the following problems in the related art: The occlusal splint design mostly adopts the flat design of the occlusal surface or the simple Boolean method of the hexahedron and the opposing teeth. These methods do not consider the cutting and grinding effects of the shape of the teeth themselves. Often, a greater biting force is required to crush the food during chewing, which causes greater pressure on the occlusal splint. In addition, the flat design of the occlusal surface also makes the occlusal splint more prone to buckling deformation (i.e., the crushing phenomenon). Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide a method, device, and medium for generating a dental model, an orthodontic appliance, and a occlusal splint, so that the generated dental model or occlusal splint reduces the biting force required for chewing food. In addition, it can convert the load into in-plane stress when subjected to a pressure load, thereby improving the anti-deformation ability.

[0006] To solve the above technical problems, an embodiment of the present invention provides a method for generating a dental model, including: obtaining the height of the occlusal pad and the three-dimensional digital dental model; generating at least two convex portions at specified positions on the three-dimensional digital dental model according to the height of the occlusal pad and the three-dimensional digital dental model; generating a support body respectively connected to the two convex portions between the two convex portions of the three-dimensional digital dental model according to the height of the occlusal pad, wherein the support body has a curved surface protruding towards the opposing jaw of the three-dimensional digital dental model; merging the three-dimensional digital dental model, the convex portions, and the support body to generate a three-dimensional digital dental model with an occlusal pad.

[0007] An embodiment of the present invention further provides an electronic device, including: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the above method for generating a dental model.

[0008] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the above method for generating a dental model is implemented.

[0009] An embodiment of the present invention further provides a method for generating an orthodontic appliance, including: generating a three-dimensional digital dental model with an occlusal pad according to the above method for generating a dental model; manufacturing a shell-shaped body corresponding to the three-dimensional digital dental model with an occlusal pad.

[0010] An embodiment of the present invention further provides a method for generating an occlusal pad, including: obtaining the height of the occlusal pad and the dental data of a patient; generating at least two convex portions for placement at specified positions on the patient's dental arch according to the patient's dental data and the height of the occlusal pad; generating a support body with a curved surface protruding towards the opposing jaw of the three-dimensional digital dental model between the two convex portions according to the patient's dental data and the height of the occlusal pad; merging the convex portions and the support body to generate a digital occlusal pad model for placement on the patient's three-dimensional digital dental model.

[0011] In an embodiment of the present invention, at least two convex portions are generated at specified positions on the three-dimensional digital dental model according to the height of the occlusal pad and the three-dimensional digital dental model; between the two convex portions of the three-dimensional digital dental model, a support body connected to the two convex portions respectively is generated according to the height of the occlusal pad, and the support body has a curved surface protruding towards the opposing jaw of the three-dimensional digital dental model; subsequently, the three-dimensional digital dental model, the convex portions, and the support body are combined to generate a three-dimensional digital dental model with an occlusal pad. Since the curved surface of the support body connecting the two convex portions and protruding towards the opposing jaw of the three-dimensional digital dental model has a certain cutting and grinding effect, compared with directly connecting the two convex portions without adding a support body, the generated dental model reduces the biting force required when chewing food, that is, increases the occlusal pressure, thereby reducing the pressure received by the convex portions and the support body during occlusion. In addition, this morphological design can also enable the support body to convert the load into in-plane stress and less out-of-plane stress when subjected to a pressure load, and is therefore less likely to undergo buckling deformation, enhancing the anti-deformation ability.

[0012] In addition, generating at least two convex portions at specified positions on the three-dimensional digital dental model according to the height of the occlusal pad and the three-dimensional digital dental model includes: determining the tooth model at the specified position of the three-dimensional digital dental model; generating at least two convex portions at the specified position of the three-dimensional digital dental model according to the height of the occlusal pad and the shape and size of the tooth model. This is one of the convex portion generation strategies that retains the original characteristics of the tooth structure, further reducing the biting force required when chewing food, thereby reducing the pressure received by the occlusal pad, and further being less likely to undergo buckling deformation compared with the existing morphology.

[0013] In addition, generating at least two convex portions at specified positions on the three-dimensional digital dental model according to the height of the occlusal pad and the shape and size of the tooth model includes: generating at least two initial convex portions with a preset shape at the specified position of the three-dimensional digital dental model; adjusting the shape of the initial convex portions according to the shape of the tooth model, and adjusting the size of the initial convex portions according to the height of the occlusal pad and the mesiodistal length and buccolingual length in the size of the tooth model, and generating at least two convex portions at the specified position of the three-dimensional digital dental model. Further adjusting the initial convexity is more conducive to the fitting of the occlusal pad and the teeth.

[0014] In addition, according to the height of the jaw pad and the three-dimensional digital dental model, a raised portion is generated at a specified position on the three-dimensional digital dental model, including: determining the tooth model at the specified position on the three-dimensional digital dental model; scaling the tooth model at the specified position in the three-dimensional digital dental model to obtain a scaled tooth model; adjusting the height of the scaled tooth model according to the height of the jaw pad to obtain an adjusted tooth model; and generating the raised portion according to the adjusted tooth model and the three-dimensional digital dental model. This is a strategy for generating the raised portion that retains the original characteristics of the tooth structure, further reducing the biting force required when chewing food, thereby reducing the pressure received by the jaw pad, and further making it less likely to undergo buckling deformation compared to the existing form.

[0015] In addition, scaling the tooth model at the specified position in the three-dimensional digital dental model includes: when scaling the tooth model at the specified position in the three-dimensional digital dental model, the scaling ratio is between 0.5 and 0.9. The most appropriate scaling ratio is given.

[0016] In addition, obtaining the height of the jaw pad includes: calculating the height of the jaw pad according to the occlusal surface of the teeth in the three-dimensional digital dental model and the occlusal surface of the corresponding contralateral teeth in the contralateral dental model data corresponding to the three-dimensional digital dental model.

[0017] In addition, calculating the height of the jaw pad according to the occlusal surface of the teeth in the three-dimensional digital dental model and the occlusal surface of the corresponding contralateral teeth in the contralateral dental model data includes: selecting a calibration point on the occlusal surface of the teeth in the three-dimensional digital dental model; determining the projection point generated by the calibration point on the occlusal surface of the corresponding contralateral teeth in the contralateral dental model data along the normal direction of the jaw plane in the tooth occlusion state; and calculating the height of the jaw pad according to the height of the calibration point and the projection point corresponding to the calibration point. The optimal scheme for obtaining the height of the jaw pad is given.

[0018] In addition, determining the calibration point corresponding to the teeth in the three-dimensional digital dental model includes: determining the calibration point corresponding to the teeth in the three-dimensional digital dental model according to the occlusal physiological characteristics. This makes the position of the calibration point more reasonable, and thus a better jaw pad height can be obtained.

[0019] In addition, determining the calibration point corresponding to the teeth in the three-dimensional digital dental model according to the occlusal physiological characteristics includes: when the teeth in the three-dimensional digital dental model are maxillary teeth, determining the calibration point corresponding to the teeth in the three-dimensional digital dental model in the area near the lingual side according to the occlusal physiological characteristics; when the teeth in the three-dimensional digital dental model are mandibular teeth, determining the calibration point corresponding to the teeth in the three-dimensional digital dental model in the area near the buccal side according to the occlusal physiological characteristics. This makes the position of the calibration point more reasonable, and thus a better jaw pad height can be obtained.

[0020] In addition, generating the raised portion according to the adjusted tooth model and the three-dimensional digital model of the dental arch includes: generating the main structure of the raised portion according to the adjusted tooth model; obtaining the target jaw position corresponding to the three-dimensional digital model of the dental arch according to the three-dimensional digital model of the dental arch; generating a raised portion jaw position locking structure for guiding the jaw position on the mesial side or the distal side of the main structure of the raised portion according to the target jaw position; and generating the raised portion according to the main structure of the raised portion and the raised portion jaw position locking structure. This enables the raised portion to play a role in guiding the jaw position and assisting in jaw correction.

[0021] In addition, the raised portion jaw position locking structure includes a guiding surface for guiding the jaw position; wherein, the included angle between the guiding surface and the horizontal plane in the three-dimensional digital model of the dental arch is between 60° and 80°. This achieves a better tooth guiding effect.

[0022] In addition, before merging the three-dimensional digital model of the dental arch, the raised portion, and the support body to generate a three-dimensional digital model of the dental arch with a jaw pad, obtain the diaphragm thickness; the merging of the three-dimensional digital model of the dental arch, the raised portion, and the support body to generate a three-dimensional digital model of the dental arch with a jaw pad includes: translating the main structure of the raised portion in the raised portion, the raised portion jaw position locking structure in the raised portion, and the support body respectively according to the diaphragm thickness; and merging the translated raised portion, the translated support body, and the three-dimensional digital model of the dental arch through Boolean operation to generate a three-dimensional digital model of the dental arch with a jaw pad. This reserves sufficient space for the generation of the diaphragm and obtains a more suitable three-dimensional digital model of the dental arch with a jaw pad.

[0023] In addition, translating the main structure of the raised portion in the raised portion, the raised portion jaw position locking structure in the raised portion, and the support body respectively according to the diaphragm thickness includes: translating the raised portion jaw position locking structure in the raised portion towards the gingival side corresponding to the dental arch where it is located by a single time of the diaphragm thickness to adjust the height of the raised portion jaw position locking structure; and translating the main structure of the raised portion in the raised portion and the support body towards the gingival side corresponding to the dental arch where they are located by double times of the diaphragm thickness.

[0024] In addition, the radius of curvature of the curved surface protruding towards the opposing jaw of the three-dimensional digital model of the dental arch is between 0.2 mm and 0.8 mm. This enables the support body to better convert the load into in-plane stress.

[0025] In addition, the peak point on the curved surface of the support body connected to the two raised portions and protruding towards the opposing jaw of the three-dimensional digital model of the dental arch does not exceed, in the vertical upward direction, the peak point of any raised portion connected to the support body. This ensures that the support body will not be too long.

[0026] In addition, the support body with a curved surface protruding towards the opposing jaw of the three-dimensional digital dental model is: an ellipsoid or a sphere. Combining the geometric properties of the ellipsoid and the sphere further enhances the anti-deformation ability of the support body.

[0027] In addition, between the two convex portions of the three-dimensional digital dental model, a support body connected to the two convex portions is generated according to the occlusal pad height, including: when the support body generated between the convex portions of the three-dimensional digital dental model is ellipsoidal, the center point of the support body and the semi-major axis of the ellipsoid of the support body are determined according to two adjacent convex portions of the three-dimensional digital dental model, the occlusal pad height, and the three-dimensional digital dental model, and the support body is generated according to the center point of the support body, the semi-major axis of the ellipsoid of the support body, and a preset radius of curvature; when the support body generated between the convex portions of the three-dimensional digital dental model is spherical, the center point of the support body and the spherical radius are determined according to two adjacent convex portions of the three-dimensional digital dental model, the occlusal pad height, and the three-dimensional digital dental model, and the support body is generated. Combining the convex portions, the dental model, and the height accurately controls the shape of the support body.

[0028] In addition, the three-dimensional digital dental model has corresponding contralateral dental model data, and the contralateral dental model data includes the occlusal surface of the contralateral teeth; the determination of the center point of the support body and the semi-major axis of the ellipsoid of the support body according to two adjacent convex portions of the three-dimensional digital dental model, the occlusal pad height, and the three-dimensional digital dental model includes: projecting the feature points of two adjacent convex portions of the three-dimensional digital dental model along the positive and negative directions of the mesiodistal axis of the teeth of the three-dimensional digital dental model to each other, obtaining two projection points located on the convex portions, and the feature points are the center, centroid, buccal cusp center point, or lingual cusp center point of the tooth where the convex portion is located; taking the midpoint of the line connecting the two projection points located on the convex portions, and projecting the midpoint along the positive and negative directions of the normal of the occlusal plane of the three-dimensional digital dental model to the dental arch where the designated position of the three-dimensional digital dental model is located and the occlusal surface of the contralateral teeth, obtaining a first projection point located on the dental arch where the designated position of the three-dimensional digital dental model is located and a second projection point located on the occlusal surface of the contralateral teeth; constructing a ray passing through the first projection point with the second projection point as an endpoint, and determining the center point of the support body on the ray passing through the first projection point according to the occlusal pad height, and the length of the line segment formed between the center point of the support body and the second projection point is the semi-major axis of the ellipsoid of the support body. A support body with a more suitable shape is obtained.

[0029] In addition, determining the center point of the support on the ray passing through the first projection point includes: according to the height of the occlusal pad, determining the center point of the support at a position on the ray passing through the first projection point that is farther from the occlusal surface of the contralateral tooth relative to the first projection point. This makes the position of the center point more reasonable, and thus a support with a more suitable shape is obtained.

[0030] In addition, generating the support according to the center point of the support, the semi-major axis of the ellipsoid of the support, and a preset curvature radius includes: generating an elliptical surface corresponding to the support according to the semi-major axis of the ellipsoid of the support and the preset curvature radius; rotating the elliptical surface corresponding to the support 180 degrees around the central axis formed by the semi-major axis of the ellipsoid of the support and the center point of the support to generate the support. This significantly improves the speed of generating the support.

[0031] In addition, a corresponding occlusal pad generation area is designated at a position determined according to the buccolingual length in the three-dimensional dental digital model.

[0032] In addition, when merging the three-dimensional dental digital model, the raised part, and the support, when there is a part of the support that exceeds the occlusal pad generation area, the part of the support that exceeds the occlusal pad generation area is removed through Boolean operation. This avoids the part of the support that exceeds the occlusal pad generation area.

[0033] In addition, the occlusal pad area in the three-dimensional dental digital model with the occlusal pad is filled with undercuts to obtain the three-dimensional dental digital model with the occlusal pad after filling with undercuts. Filling with undercuts reduces the triangular area between the teeth and the raised part, avoids being adsorbed during diaphragm pressing, and facilitates demolding.

[0034] In addition, the designated position is in the posterior tooth area of the three-dimensional dental digital model. The occlusal pad set in the posterior tooth area helps to open the occlusion and facilitates contacting occlusal interferences. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, the drawings in the figures do not constitute a proportional limitation.

[0036] Figure 1 is a flowchart of a method for generating a dental model according to an embodiment of the present invention;

[0037] Figure 2 is a schematic diagram of scaling the tooth model of the dental model according to an embodiment of the present invention;

[0038] Figure 3Schematic diagram of adjusting the height of the convex part of the dental model provided according to an embodiment of the present invention;

[0039] Figure 4 Force diagram of the central compression deformation of the flat plate structure provided according to an embodiment of the present invention;

[0040] Figure 5 Force diagram of the central compression deformation of the ellipsoidal shell structure provided according to an embodiment of the present invention;

[0041] Figure 6 Schematic diagram of the support structure provided according to an embodiment of the present invention;

[0042] Figure 7 Schematic diagram of the dental model with the jaw position locking structure and the support provided according to an embodiment of the present invention;

[0043] Figure 8 Schematic diagram of the dental model for determining the center position of the support provided according to an embodiment of the present invention;

[0044] Figure 9 Schematic diagram of the dental model translated according to the diaphragm thickness provided according to an embodiment of the present invention;

[0045] Figure 10 Schematic diagram of the effect of the wax-filled dental model provided according to an embodiment of the present invention;

[0046] Figure 11 Schematic diagram of the structure of the electronic device provided according to another embodiment of the present invention;

[0047] Figure 12 Flowchart of the method for generating the orthodontic appliance provided according to another embodiment of the present invention;

[0048] Figure 13 Flowchart of the method for generating the occlusal splint provided according to another embodiment of the present invention. Detailed implementation manners

[0049] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will elaborate on each implementation manner of the present invention in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that in each implementation manner of the present invention, many technical details are proposed for the convenience of readers to understand the present application. However, even without these technical details and various changes and modifications based on the following implementation manners, the technical solutions claimed in the present application can still be implemented. The division of the following various embodiments is for the convenience of description and should not constitute any limitation to the specific implementation manners of the present invention. Various embodiments can be combined and cross-referenced with each other on the premise of no contradiction.

[0050] In each embodiment of the present application, the "anterior tooth area" and "posterior tooth area" mentioned are defined according to the tooth classification on pages 36-38 of the second edition of "Introduction to Stomatology" published by Peking University Medical Press, including premolars and molars, teeth numbered 4-8 in the FDI notation, and teeth numbered 1-3 in the FDI notation for the anterior tooth area. The teeth in the anterior tooth area include central incisors, lateral incisors, and canines.

[0051] One embodiment of the present invention relates to a method for generating a dental cast model, which can be applied to any electronic device capable of generating a digital dental cast model, such as computer devices like mobile phones and computers, or dedicated instruments for collecting dental cast data. In this embodiment, at least two protrusions are generated at designated positions on the three-dimensional digital dental cast model according to the height of the occlusal splint; between the two protrusions of the three-dimensional digital dental cast model, a support body connected to the two protrusions respectively is generated according to the height of the occlusal splint, and the support body has a curved surface protruding towards the opposing jaw of the three-dimensional digital dental cast model; the three-dimensional digital dental cast model, the protrusions, and the support body are combined to generate a three-dimensional digital dental cast model with an occlusal splint. Combining the anatomical features of the teeth themselves, when subjected to a pressure load, it can convert the load into in-plane stress and less out-of-plane stress, and is not prone to buckling deformation compared with other shapes. The implementation details of the method for generating the dental cast model in this embodiment are specifically described below. The following content is only provided for convenient understanding of the implementation details and is not necessary for implementing this solution.

[0052] As Figure 1As shown, in step 101, a computer device that can be used to generate a dental model acquires the occlusal splint height and a three-dimensional digital dental model. Here, the three-dimensional digital dental model is a digital three-dimensional model generated by collecting the dental data of a patient, which contains various parameters of the patient's teeth and three-dimensional views of the upper / lower dental arches. The occlusal splint height determines the height of the occlusal splint generated based on this dental model. This occlusal splint height can be preset or calculated. For example, the method of calculating the occlusal splint height can be: calculating the occlusal splint height based on the occlusal surface of the teeth in the three-dimensional digital dental model and the occlusal surface of the corresponding teeth in the contralateral dental model data corresponding to the three-dimensional digital dental model. In a more detailed example, it can be to first select a calibration point on the occlusal surface of the teeth in the three-dimensional digital dental model; then determine the projection point generated by the calibration point on the occlusal surface of the corresponding teeth in the contralateral dental model data along the normal direction of the occlusal plane in the tooth occlusion state; and then calculate the occlusal splint height based on the height of this calibration point and the projection point corresponding to the calibration point. In the above process, in the step of determining the calibration point corresponding to the teeth in the three-dimensional digital dental model, the calibration point corresponding to the teeth in the three-dimensional digital dental model can be determined according to the occlusal physiological characteristics. Considering that some patients actually cannot occlude accurately, the occlusal physiological characteristics include characteristics such as the medical principle of cusp-fossa alignment. By combining with these occlusal physiological characteristics to determine the calibration point, the selection of the tooth calibration point can be made more reasonable. Further, when the teeth in the three-dimensional digital dental model are maxillary teeth, the calibration point corresponding to the teeth in the three-dimensional digital dental model can be determined in the lingual side area close to the occlusal surface according to the occlusal physiological characteristics; when the teeth in the three-dimensional digital dental model are mandibular teeth, the calibration point corresponding to the teeth in the three-dimensional digital dental model can be determined in the buccal side area close to the occlusal surface according to the occlusal physiological characteristics. This further makes the selection of the calibration point more reasonable and thus obtains a more suitable occlusal splint height.

[0053] In step 102, a computer device that can be used to generate a dental model generates at least two protrusions at a specified position on the three-dimensional digital dental model according to the occlusal splint height and the three-dimensional digital dental model. There are many ways to generate the protrusions. In an example, the tooth model at the specified position on the three-dimensional digital dental model can be determined first; and then at least two protrusions are generated at the specified position on the three-dimensional digital dental model according to the occlusal splint height and the shape and size of the tooth model. The protrusions generated in this way combine the anatomical characteristics of the teeth themselves and are less likely to deform.

[0054] There are also many methods for generating the raised part by considering the anatomical feature structure of the patient's teeth itself, which can be roughly divided into two categories. One category is to first generate an initial raised part at a specified position on the three-dimensional digital dental model according to a preset template, and then adjust the generated initial raised part according to the anatomical feature structure of the teeth itself. The other category is to directly generate the raised part according to the patient's teeth, retaining the anatomical feature structure of the teeth itself to the greatest extent.

[0055] Let's first discuss the category of generating an initial raised part according to a preset template and then adjusting the initial raised part according to the anatomical feature structure of the teeth itself. For example, the tooth model at the specified position on the three-dimensional digital dental model can be determined first; then, at least two raised parts are generated at the specified position on the three-dimensional digital dental model according to the occlusal pad height and the shape and size of the tooth model. Further, the step of generating at least two raised parts at the specified position on the three-dimensional digital dental model according to the occlusal pad height and the shape and size of the tooth model can be: first generating at least two initial raised parts with a preset shape at the specified position on the three-dimensional digital dental model; then adjusting the shape of the initial raised part according to the shape of the tooth model, and adjusting the size of the initial raised part according to the occlusal pad height and the mesiodistal length and buccolingual length in the size of the tooth model, so as to generate at least two raised parts at the specified position on the three-dimensional digital dental model.

[0056] Next, let's discuss the category of directly generating the raised part according to the patient's teeth. For example, after determining the tooth model at the specified position on the three-dimensional digital dental model, the tooth model at the specified position in the three-dimensional digital dental model is directly scaled to obtain a scaled tooth model; then the height of the scaled tooth model is adjusted according to the occlusal pad height to obtain an adjusted tooth model; the raised part is generated according to the adjusted tooth model and the three-dimensional digital dental model. When scaling the tooth model at the specified position in the three-dimensional digital dental model (in this embodiment, three teeth in the scaled tooth area are taken as an example for illustration, and other positions and numbers of teeth can be set in actual applications, which will not be listed one by one here), the scaling ratio can be set between 0.5 and 0.9 to achieve better results (in this embodiment, the scaling ratio of 0.8 is taken as an example for display, and other values can be set in actual applications, which will not be listed one by one here), and the scaling effect is as Figure 2 shown, Figure 2 It can be clearly seen that the overall scaled tooth model A' is smaller than the unscaled tooth model A, but the shape remains unchanged. In one example, adjusting the height of the scaled tooth model according to the occlusal pad height to obtain the adjusted tooth model is as Figure 3 shown. Adjusting the height of the tooth model involves adjusting the specific height parameters of the tooth model. Finally, the height of the adjusted tooth model is atFigure 3 In the figure, they are represented by H1 to H3. The heights H1 to H3 of the adjusted tooth models are affected by the initial shapes of the individual tooth models and need to be adjusted differently, so they are not necessarily equal.

[0057] Moreover, in addition to the main structure of the convex part, a corresponding jaw position locking structure can be provided on the convex part. The jaw position locking structure can complete the guidance of the jaw position and generate an occlusal pad that can mesh between the jaws. For the above generation method of initially generating the convex part according to a preset template and then adjusting the initial convex part according to the anatomical feature structure of the tooth itself, the jaw position locking structure can be a part of the preset template or an additional structure added after adjusting the convex part. For the method of directly generating the convex part according to the patient's teeth, all the structures on the convex part are naturally generated during the generation of the convex part, which includes the jaw position locking structure of the convex part other than the main structure. For example, it can be: generating the main structure of the convex part according to the adjusted tooth model; then obtaining the target jaw position corresponding to the three-dimensional digital model of the dental arch according to the three-dimensional digital model of the dental arch; generating a convex part jaw position locking structure for guiding the jaw position on the mesial side or distal side of the main structure of the convex part according to the target jaw position; generating the convex part according to the main structure of the convex part and the convex part jaw position locking structure. It can be at the bottom of the convex part (the part meshing with the tooth), and at this time, it completes the guidance of the jaw position through the frictional force with the lower jaw. It can also be a structure with a guiding surface. When the teeth start to bite, the upper and lower guiding surfaces will contact and squeeze, and the pressure during this process is guided by the guiding surface to complete the guidance of the jaw position. When the convex part jaw position locking structure includes a guiding surface for guiding the jaw position; the included angle between the guiding surface and the horizontal plane in the three-dimensional digital model of the dental arch can be set between 60° and 80°.

[0058] In step 103, a computer device that can be used to generate a dental arch model generates a support body connected to the two convex parts respectively according to the occlusal pad height between the two convex parts of the three-dimensional digital model of the dental arch. Among them, the support body has a curved surface protruding towards the opposing jaw of the three-dimensional digital model of the dental arch; the radius of curvature of this curved surface protruding towards the opposing jaw of the three-dimensional digital model of the dental arch can be set between 0.2 mm and 0.8 mm. And the peak point on this curved surface protruding towards the opposing jaw of the three-dimensional digital model of the dental arch does not exceed the peak point of any convex part connected to the support body in the vertical upward direction (the peak point is the highest point among the extreme points of each protrusion on a convex part).

[0059] In one example, the support with a curved surface protruding towards the opposing jaw of the three-dimensional digital dental model is: an ellipsoid or a sphere. When subjected to a pressure load, an ellipsoid or a sphere can convert the load into in-plane stress and less out-of-plane stress, and is less likely to buckle compared to other shapes. In this regard, the inventor of the present application conducted experimental verification. Take a flat plate and an ellipsoidal shell with the same thickness, and apply a horizontal pressure of 100 N at the center respectively. After applying a horizontal pressure of 100 N at the center of the flat plate structure, as Figure 4 shown, Figure 4 shows the deformation of the flat plate structure under pressure. The framed part is the stress analysis diagram corresponding to the cross-section of the structure. Figure 4 The directions of the arrows f1 to f5 in it illustrate the directions of the out-of-plane stresses at 5 points on the flat plate structure, and the lengths of the arrows f1 to f5 represent the magnitudes of the out-of-plane stresses. After applying a horizontal pressure of 100 N at the center of the ellipsoidal shell structure, as Figure 5 shown, Figure 5 the directions of the arrows F1 to F6 in it illustrate the directions of the out-of-plane stresses at 6 points on the ellipsoidal shell structure, and the lengths of the arrows F1 to F6 represent the magnitudes of the out-of-plane stresses. Through the comparison of Figure 4 and Figure 5 , it can be seen that after the ellipsoidal shell or spherical shell bears external forces of the same magnitude and direction, part of the stress is converted into in-plane stress, and the remaining out-of-plane stress is smaller, and the deformation of the ellipsoidal shell is smaller than that of the flat plate structure. It can be seen that smaller out-of-plane stress will result in less bending and thus less likely to undergo buckling deformation. Therefore, the ellipsoidal shell structure is usually used more in components that bear pressure. In addition, the added ellipsoidal or spherical support can increase the contact points of occlusion. The ellipsoidal shell has higher compressive capacity compared to a jaw pad with a flat occlusal contact position when subjected to a vertical load. The top of the spherical shell can also bear part of the function of crushing food due to its smaller curvature and joint action with the opposing teeth.

[0060] When the support generated between the convex parts of the three-dimensional digital dental model is spherical, the method of generating supports respectively connected to the two convex parts can be: determining the center point and spherical radius of the support according to the convex parts of two adjacent three-dimensional digital dental models, the height of the jaw pad, and the three-dimensional digital dental model, and generating the support. For example, the center point of the support can be confirmed according to two adjacent convex parts and points on the dental model, and the spherical radius can be determined according to the height of the jaw pad to generate a spherical support between the two convex parts.

[0061] When the support generated between the convex portions of the three-dimensional digital dental model is an ellipsoid, the support connected to the two convex portions can be generated in the following way: determine the center point of the support and the semi-major axis of the ellipsoid of the support according to two adjacent convex portions of the three-dimensional digital dental model, the height of the occlusal pad, and the three-dimensional digital dental model, and generate the support according to the center point of the support, the semi-major axis of the ellipsoid of the support, and a preset radius of curvature. In an example, the three-dimensional digital dental model has corresponding contralateral dental model data, and the contralateral dental model data includes the occlusal surface of the contralateral teeth. In this example, as Figure 6As shown in the figure, the method for determining the dot of the support body and the semi-major axis of the ellipsoid of the support body based on the convex part, the height of the occlusal pad, and the three-dimensional digital model of the dental arch of two adjacent three-dimensional digital models of the dental arch can be as follows: Project the feature points g1 and g2 of the convex parts of the two adjacent three-dimensional digital models of the dental arch along the positive and negative directions of the mesiodistal direction of the teeth of the three-dimensional digital model of the dental arch on the side walls of the convex parts respectively (the "middle" in the mesial or distal of the teeth refers to the midline, which divides the craniofacial region into two equal left and right parts. The side closer to the midline of the teeth is the mesial, and vice versa, the side farther away is the distal. In other words, the positive direction of the mesiodistal direction of the teeth is the mesial direction, and the negative direction is the distal direction), to obtain two projection points gm1 and gd1 located on the convex parts. The feature points g1 and g2 can be one of the following types: the center, the centroid, the buccal cusp center point or the lingual cusp center point of the tooth corresponding to the convex part. Among them, there are 2 points on the buccal cusp of the tooth where the convex part is located, and the buccal cusp center point is the midpoint between the two buccal cusps. Similarly, the lingual cusp center point is the midpoint between the two lingual cusps. Then, take the midpoint G of the line connecting the two projection points located on the convex parts, and project the midpoint G along the positive and negative directions of the normal of the occlusal plane of the three-dimensional digital model of the dental arch onto the dental arch at the specified position of the three-dimensional digital model of the dental arch and the occlusal surface of the contralateral teeth respectively, to obtain the first projection point M1 located on the dental arch at the specified position of the three-dimensional digital model of the dental arch and the second projection point M2 located on the occlusal surface of the contralateral teeth. Construct a ray passing through the first projection point with the second projection point M2 as the endpoint, and determine the dot of the support body (not marked in the figure) on the ray passing through the first projection point according to the height of the occlusal pad. The length of the line segment formed between the dot of the support body and the second projection point M2 is the semi-major axis of the ellipsoid of the support body. The method for determining the dot of the support body can be: According to the height of the occlusal pad, determine the dot of the support body at a position on the ray passing through the first projection point M1 that is farther away from the occlusal surface of the contralateral teeth relative to the first projection point M1. Then, generate the support body according to the dot of the support body, the semi-major axis of the ellipsoid of the support body, and a preset radius of curvature. This method can be: First, generate the elliptical surface corresponding to the support body according to the semi-major axis of the ellipsoid of the support body and the preset radius of curvature. Then, rotate the elliptical surface corresponding to the support body 180 degrees around the central axis formed by the semi-major axis of the ellipsoid of the support body and the dot of the support body to generate the support body. As Figure 7 shown in Figure 7The characteristic points g1 and g2 of the convex parts of two adjacent three-dimensional digital dental models are projected onto each other along the positive and negative directions of the mesiodistal axis of the teeth of the three-dimensional digital dental models, respectively, to obtain two projection points gm1 and gd1 located on the convex parts; then, the midpoint G of the line connecting the two projection points located on the convex parts is taken, and the midpoint G is projected onto the dental arch where the specified position of the three-dimensional digital dental model is located and the occlusal surface of the contralateral teeth along the positive and negative directions of the normal of the dental arch plane of the three-dimensional digital dental model, respectively, to obtain a first projection point M1 and a second projection point M2 located on the occlusal surface of the contralateral teeth; a ray passing through the first projection point is constructed with the second projection point M2 as an endpoint, and the center point O of the support is determined on the ray passing through the first projection point according to the height of the occlusal pad. The length of the line segment formed between the center point O of the support and the second projection point M2 is the semi-major axis of the ellipsoid of the support. An elliptical surface corresponding to the support as shown in Figure 7 is generated according to the semi-major axis of the ellipsoid of the support and a preset radius of curvature. The elliptical surface corresponding to the support is rotated 180 degrees around the central axis formed by the semi-major axis of the ellipsoid of the support and the center point of the support to generate the support. The part of the support that extends beyond the occlusal pad generation area will be removed by Boolean operation in subsequent steps.

[0062] In step 104, the computer device combines the three-dimensional digital dental model, the convex part, and the support to generate a three-dimensional digital dental model with an occlusal pad. Specifically, the union of the above parts can be obtained by Boolean operation during combination, and the overlapping parts are automatically trimmed.

[0063] Continuing the description, the three-dimensional digital dental model with an occlusal pad is as shown in Figure 8 At this time, the convex part is provided with a jaw position locking structure B as shown in Figure 8 and the jaw position locking structure has a guiding surface b1 as shown in the figure.

[0064] In one example, before entering step 104, the diaphragm thickness is obtained; then when combining the three-dimensional digital dental model, the raised portion, and the support to generate a three-dimensional digital dental model with a dental pad, it includes: translating the raised portion main structure in the raised portion, the raised portion jaw position locking structure in the raised portion, and the support respectively according to the diaphragm thickness; subsequently, combining the translated raised portion, the translated support, and the three-dimensional digital dental model through Boolean operation to generate a three-dimensional digital dental model with a dental pad. This translation is mainly because a molding operation may be performed after generating the three-dimensional digital dental model with a dental pad to reserve thickness for the diaphragm. Further, this translation can be not only that the raised portion and the support are translated by the same height according to the diaphragm thickness as a whole, but also that the raised portion jaw position locking structure in the raised portion is translated by a single diaphragm thickness towards the gingival side corresponding to the dental arch where it is located to adjust the height of the raised portion jaw position locking structure; then the raised portion main structure in the raised portion and the support are translated by twice the diaphragm thickness towards the gingival side corresponding to the dental arch where they are located. As Figure 9 shown, assuming the diaphragm thickness is c, then the raised portion main structure in the raised portion and the support are translated by a distance of 2c towards the gingival side corresponding to the dental arch where they are located, and the raised portion jaw position locking structure in the raised portion is translated by a distance of c towards the gingival side corresponding to the dental arch where it is located. This translation is mainly considered that the jaw position locking structure on the opposite side also needs to be translated towards the opposite dental arch, and the translation distance is also c. Since there is no raised portion on the opposite tooth, the translation distance of the raised portion main structure and the support is twice that of the jaw position locking structure.

[0065] In one example, a dental pad generation area determined according to the buccolingual length in the three-dimensional digital dental model corresponds to a specified position in the three-dimensional digital dental model; at this time, when combining the three-dimensional digital dental model, the raised portion, and the support, when there is a part of the support that exceeds the dental pad generation area, the part of the support that exceeds the dental pad generation area is removed through Boolean operation. In one example, the specified position is in the posterior tooth area of the three-dimensional digital dental model.

[0066] In one example, after generating the three-dimensional digital dental model with a dental pad, the dental pad area in the three-dimensional digital dental model with a dental pad is filled with undercuts to obtain a three-dimensional digital dental model with a dental pad after filling with undercuts, for example Figure 10As shown, the undercuts in the areas d1, d2, and d3 in the occlusal pad region have all been filled. In some embodiments, the method for determining the undercut filling part can obtain the intermediate undercut filling grid based on the intermediate midpoint. The specific process includes: First, use the intermediate midpoint as the center of the sampling circle, and use the plane perpendicular to the line connecting the digital grid centers of two adjacent teeth as the plane where the sampling circle is located. Then, according to the preset radius, a complete sampling circle can be obtained. After that, a set of sampling points are evenly sampled on the circumference of the initial sampling circle. Then, calculate the distances between each vertex in the tooth digital grid of the two adjacent tooth models and each of the sampling points, and respectively select the points with the minimum distance from the two tooth models as the corresponding points, so as to obtain two sets of corresponding points. Then, interpolation circle points are added between the two sets of corresponding points, and the interpolation points in the interpolation circle points and the two sets of target corresponding points are connected by a triangular grid to form a tooth undercut closed grid, thereby obtaining the intermediate undercut filling grid. It can be understood that in addition to the above method for confirming the undercut filling area, in practical applications, other methods for confirming the undercut filling area can also be used, which will not be listed one by one here.

[0067] In this embodiment, according to the occlusal pad height and the three-dimensional dental digital model, at least two convex parts are generated at the specified positions on the three-dimensional dental digital model; between the two convex parts of the three-dimensional dental digital model, a support body connected to the two convex parts is generated according to the occlusal pad height. The support body has a curved surface protruding towards the opposing jaw of the three-dimensional dental digital model; the three-dimensional dental digital model, the convex parts, and the support body are combined to generate a three-dimensional dental digital model with an occlusal pad. Since the curved surface of the support body connecting the two convex parts and protruding towards the opposing jaw of the three-dimensional dental digital model has a certain cutting and grinding effect, compared with directly connecting the two convex parts without adding a support body, the generated dental model reduces the biting force required when chewing food, that is, increases the occlusal pressure, and further reduces the pressure received by the convex parts and the support body during occlusion. In addition, this morphological design can also enable the support body to convert the load into in-plane stress and less out-of-plane stress when subjected to a pressure load, and thus is less likely to undergo buckling deformation, enhancing the anti-deformation ability.

[0068] Another embodiment of the present invention relates to an electronic device, such as Figure 11 shown, including at least one processor 1101; and a memory 1102 communicatively connected to the at least one processor; wherein, 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 generating a dental model as described above.

[0069] Among them, the memory 1102 and the processor 1101 are connected in a bus manner. The bus may include any number of interconnected buses and bridges, and the bus connects various circuits of one or more processors 1101 and the memory 1102 together. The bus may also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art, and thus will not be further described herein. The bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or multiple elements, such as multiple receivers and transmitters, and provides a unit for communicating with various other devices on the transmission medium. The data processed by the processor 1101 is transmitted on the wireless medium through the antenna. Further, the antenna also receives data and transmits the data to the processor 1101.

[0070] The processor 1101 is responsible for managing the bus and general processing, and may also provide various functions, including timing, peripheral interface, voltage regulation, power management, and other control functions. The memory 1102 may be used to store data used by the processor 1101 when executing operations.

[0071] Another embodiment of the present invention relates to a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the above method embodiments are implemented.

[0072] That is, those skilled in the art can understand that all or part of the steps in implementing the above method embodiments can be completed by instructing relevant hardware through a program. The program is stored in a storage medium, including several instructions for causing a device (which may be a single-chip microcomputer, a chip, etc.) or a processor to execute all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical disks, etc., which can store program codes.

[0073] Another embodiment of the present invention relates to an orthodontic appliance generation method, which can be applied to any manufacturing device that can generate orthodontic appliances, such as computer devices like mobile phones and computers. In this embodiment, as Figure 12 shown, in step 1201, the manufacturing device of the orthodontic appliance generates a three-dimensional digital model of a dental arch with a jaw pad through the method for generating a dental arch model in the above embodiment;

[0074] In step 1202, the manufacturing device of the orthodontic appliance manufactures the shell-shaped body corresponding to the three-dimensional digital model of the dental arch with a jaw pad. In one example, there are two types of ways to manufacture the shell-shaped body corresponding to the three-dimensional digital model of the dental arch with a jaw pad, and each type has a corresponding implementation method. The first one can be: manufacturing a solid model of the three-dimensional digital model of the dental arch with a jaw pad by using additive manufacturing; according to the solid model of the three-dimensional digital model of the dental arch with a jaw pad, manufacturing the shell-shaped body corresponding to the three-dimensional digital model of the dental arch with a jaw pad by using thermoforming. The second implementation method can be: generating a digital model of the shell-shaped body corresponding to the three-dimensional digital model of the dental arch with a jaw pad according to the three-dimensional digital model of the dental arch with a jaw pad; manufacturing the shell-shaped body corresponding to the three-dimensional digital model of the dental arch with a jaw pad by using additive manufacturing according to the digital model of the shell-shaped body corresponding to the three-dimensional digital model of the dental arch with a jaw pad.

[0075] Another embodiment of the present invention relates to a method for generating a jaw pad, which can be applied to any electronic device capable of generating a jaw pad, such as computer devices like mobile phones and computers. In this embodiment, as Figure 13 shown, in step 1301, the computer device obtains the jaw pad height and obtains the patient's tooth data; the patient's tooth data can be obtained from the three-dimensional digital model of the dental arch. In step 1302, the computer device generates at least two convex portions for being placed at specified positions on the patient's dental arch according to the patient's tooth data and the jaw pad height; in one example, generating at least two convex portions according to the patient's tooth data and the jaw pad height includes: determining the relative positions between the at least two convex portions according to the patient's tooth data; adjusting the tooth parameters in the patient's tooth data to obtain the adjusted patient's tooth data; generating the at least two convex portions according to the adjusted patient's tooth data, the relative positions between the convex portions, and the jaw pad height. In one example, the generating the at least two convex portions according to the adjusted patient's tooth data, the relative positions between the convex portions, and the jaw pad height includes: generating the main body structure of the convex portion according to the tooth parameters in the adjusted patient's tooth data and the jaw pad height; obtaining the jaw target position corresponding to the three-dimensional digital model of the dental arch according to the adjusted patient's tooth data; generating a convex portion jaw position locking structure for guiding the jaw position on the mesial side or distal side of the main body structure of the convex portion according to the jaw target position and the relative positions between the convex portions; generating the at least two convex portions according to the main body structure of the convex portion, the convex portion jaw position locking structure, and the relative positions between the convex portions.

[0076] In step 1303, the computer device generates a support body with a curved surface protruding towards the opposing jaw of the three-dimensional digital model of the dental arch between the two convex portions;

[0077] In step 1304, the computer device combines the raised portion and the support to generate a digital occlusal splint model for placement on the three-dimensional digital model of the patient's dental arch.

[0078] It is not difficult to find that this embodiment is a method for generating a dental arch model corresponding to the above method embodiment, and this embodiment can be implemented in cooperation with the above method embodiment. The relevant technical details mentioned in the above method embodiment for generating a dental arch model (such as generating a raised portion, generating a support, the merging process between the support and the raised portion, etc.) are still valid in this embodiment. To avoid repetition, they will not be elaborated here. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied in the above method embodiment.

[0079] It is worth mentioning that each module involved in this embodiment is a logical module. In practical applications, a logical unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. In addition, to highlight the innovative part of the present invention, units that are not closely related to solving the technical problems proposed by the present invention are not introduced in this embodiment, but this does not mean that there are no other units in this embodiment.

[0080] Those of ordinary skill in the art can understand that the above embodiments are specific examples for implementing the present invention, and in practical applications, various changes can be made in form and details without departing from the spirit and scope of the present invention.

Claims

1. A method for generating a dental cast, characterized in that, Including: Obtaining the height of the occlusal splint and the three-dimensional digital model of the dental arch; Generating at least two convex portions at a specified position on the three-dimensional digital model of the dental arch according to the height of the occlusal splint and the three-dimensional digital model of the dental arch; Generating a support body respectively connected to the two convex portions between the two convex portions of the three-dimensional digital model of the dental arch according to the height of the occlusal splint, wherein the support body has a curved surface protruding towards the opposing dental arch of the three-dimensional digital model of the dental arch; Combining the three-dimensional digital model of the dental arch, the convex portions, and the support body to generate a three-dimensional digital model of the dental arch with an occlusal splint.

2. The method for generating a dental arch model according to claim 1, wherein The step of generating at least two convex portions at a specified position on the three-dimensional digital model of the dental arch according to the height of the occlusal splint and the three-dimensional digital model of the dental arch includes: Determining the tooth model at the specified position on the three-dimensional digital model of the dental arch; Generating at least two convex portions at the specified position on the three-dimensional digital model of the dental arch according to the height of the occlusal splint and the shape and size of the tooth model.

3. The method for generating a dental model according to claim 2, characterized in that, The step of generating at least two convex portions at the specified position on the three-dimensional digital model of the dental arch according to the height of the occlusal splint and the shape and size of the tooth model includes: Generating at least two initial convex portions with a preset shape at the specified position on the three-dimensional digital model of the dental arch; Adjusting the shape of the initial convex portions according to the shape of the tooth model, and adjusting the size of the initial convex portions according to the height of the occlusal splint and the mesiodistal length and buccolingual length in the size of the tooth model, so as to generate at least two convex portions at the specified position on the three-dimensional digital model of the dental arch.

4. The method for generating a dental arch model according to claim 2, wherein The step of generating a convex portion at a specified position on the three-dimensional digital model of the dental arch according to the height of the occlusal splint and the three-dimensional digital model of the dental arch includes: Determining the tooth model at the specified position on the three-dimensional digital model of the dental arch; Scaling the tooth model at the specified position on the three-dimensional digital model of the dental arch to obtain a scaled tooth model; Adjusting the height of the scaled tooth model according to the height of the occlusal splint to obtain an adjusted tooth model; Generating the convex portion according to the adjusted tooth model and the three-dimensional digital model of the dental arch.

5. The method for generating a dental model according to claim 4, wherein, The step of scaling the tooth model at the specified position on the three-dimensional digital model of the dental arch includes: When scaling the tooth model at the specified position on the three-dimensional digital model of the dental arch, the scaling ratio is between 0.5 and 0.

9.

6. The method for generating a dental arch model according to claim 4, characterized in that, The step of obtaining the height of the occlusal splint includes: Calculating the height of the occlusal splint according to the occlusal surface of the teeth in the three-dimensional digital model of the dental arch and the occlusal surface of the opposing teeth in the data of the opposing dental arch model corresponding to the three-dimensional digital model of the dental arch.

7. The method for generating a dental model according to claim 6, wherein The step of calculating the height of the occlusal splint according to the occlusal surface of the teeth in the three-dimensional digital model of the dental arch and the occlusal surface of the opposing teeth in the data of the opposing dental arch model includes: Selecting a calibration point on the occlusal surface of the teeth in the three-dimensional digital model of the dental arch; Determining the projection point generated by the calibration point on the occlusal surface of the opposing teeth in the data of the opposing dental arch model along the normal direction of the occlusal plane in the tooth occlusion state; Calculating the height of the occlusal splint according to the height of the calibration point and the projection point corresponding to the calibration point.

8. The method for generating a dental arch model according to claim 7, characterized in that, Determining the calibration points corresponding to the teeth in the three-dimensional digital dental model includes: Determining the calibration points corresponding to the teeth in the three-dimensional digital dental model according to the occlusal physiological characteristics.

9. The method for generating a dental cast according to claim 8, wherein, The determining the calibration points corresponding to the teeth in the three-dimensional digital dental model according to the occlusal physiological characteristics includes: When the teeth in the three-dimensional digital dental model are maxillary teeth, determining the calibration points corresponding to the teeth in the three-dimensional digital dental model in the area close to the lingual side according to the occlusal physiological characteristics; When the teeth in the three-dimensional digital dental model are mandibular teeth, determining the calibration points corresponding to the teeth in the three-dimensional digital dental model in the area close to the buccal side according to the occlusal physiological characteristics.

10. The method for generating a dental arch model according to claim 4, wherein Generating the raised part according to the adjusted tooth model and the three-dimensional digital dental model includes: Generating the main structure of the raised part according to the adjusted tooth model; Obtaining the jaw target position corresponding to the three-dimensional digital dental model according to the three-dimensional digital dental model; Generating a raised part jaw position locking structure for guiding the jaw position on the mesial side or distal side of the main structure of the raised part according to the jaw target position; Generating the raised part according to the main structure of the raised part and the raised part jaw position locking structure.

11. The method for generating a dental arch model according to claim 10, characterized in that, The raised part jaw position locking structure includes a guiding surface for guiding the jaw position; Wherein, the included angle formed between the guiding surface and the horizontal plane in the three-dimensional digital dental model is between 60° and 80°.

12. The method for generating a dental cast according to claim 10, wherein, The method further includes: Before merging the three-dimensional digital dental model, the raised part, and the support to generate a three-dimensional digital dental model with a jaw pad, obtaining the diaphragm thickness; The merging the three-dimensional digital dental model, the raised part, and the support to generate a three-dimensional digital dental model with a jaw pad includes: Translating the main structure of the raised part in the raised part, the raised part jaw position locking structure in the raised part, and the support respectively according to the diaphragm thickness; Merging the translated raised part, the translated support, and the three-dimensional digital dental model through Boolean operation to generate a three-dimensional digital dental model with a jaw pad.

13. The method for generating a dental cast according to claim 12, characterized in that, The translating the main structure of the raised part in the raised part, the raised part jaw position locking structure in the raised part, and the support respectively according to the diaphragm thickness includes: Translating the raised part jaw position locking structure in the raised part towards the gingival side corresponding to the jaw where it is located by a single-fold diaphragm thickness to adjust the height of the raised part jaw position locking structure; Translating the main structure of the raised part in the raised part and the support towards the gingival side corresponding to the jaw where they are located by a double-fold diaphragm thickness.

14. The method for generating a dental arch model according to claim 1, characterized in that, The radius of curvature of the curved surface protruding towards the opposing jaw of the three-dimensional digital dental model is between 0.2 mm and 0.8 mm.

15. The method for generating a dental arch model according to claim 1 or 14, characterized in that, The peak point on the curved surface protruding towards the opposing jaw of the three-dimensional digital dental model of the support connected to the two raised parts is not higher than the peak point of any raised part connected to the support in the vertical upward direction.

16. The method for generating a dental cast according to claim 15, characterized in that, The support with a curved surface protruding towards the opposing jaw of the three-dimensional digital dental model is: an ellipsoid or a sphere.

17. The method for generating a dental cast according to claim 16, wherein, Between the two convex portions of the three-dimensional digital dental model, a support body connected to the two convex portions is generated according to the occlusal splint height, including: When the support body generated between the convex portions of the three-dimensional digital dental model is an ellipsoid, the center point of the support body and the semi-major axis of the ellipsoid of the support body are determined according to two adjacent convex portions of the three-dimensional digital dental model, the occlusal splint height, and the three-dimensional digital dental model, and the support body is generated according to the center point of the support body, the semi-major axis of the ellipsoid of the support body, and a preset radius of curvature; When the support body generated between the convex portions of the three-dimensional digital dental model is a sphere, the center point of the support body and the spherical radius are determined according to two adjacent convex portions of the three-dimensional digital dental model, the occlusal splint height, and the three-dimensional digital dental model, and the support body is generated.

18. The method for generating a dental arch model according to claim 17, wherein The three-dimensional digital dental model has corresponding contralateral dental model data, and the contralateral dental model data includes the occlusal surface of the contralateral teeth; The determining the center point of the support body and the semi-major axis of the ellipsoid of the support body according to two adjacent convex portions of the three-dimensional digital dental model, the occlusal splint height, and the three-dimensional digital dental model includes: The characteristic points of two adjacent convex portions of the three-dimensional digital dental model are projected onto each other along the positive and negative directions of the mesiodistal axis of the teeth of the three-dimensional digital dental model to obtain two projection points located on the convex portions, and the characteristic points are the center, centroid, buccal cusp center point or lingual cusp center point of the tooth where the convex portion is located; Take the midpoint of the line connecting the two projection points located on the convex portions, and project the midpoint along the positive and negative directions of the normal of the occlusal plane of the three-dimensional digital dental model onto the dental arch where the specified position of the three-dimensional digital dental model is located and the occlusal surface of the contralateral teeth to obtain a first projection point located on the dental arch where the specified position of the three-dimensional digital dental model is located and a second projection point located on the occlusal surface of the contralateral teeth; Construct a ray passing through the first projection point with the second projection point as an endpoint, and determine the center point of the support body on the ray passing through the first projection point according to the occlusal splint height, and the length of the line segment formed between the center point of the support body and the second projection point is the semi-major axis of the ellipsoid of the support body.

19. The method for generating a dental arch model according to claim 18, characterized in that, The determining the center point of the support body on the ray passing through the first projection point according to the occlusal splint height includes: According to the occlusal splint height, on the ray passing through the first projection point, determine the center point of the support body at a position farther from the occlusal surface of the contralateral teeth relative to the first projection point.

20. The method for generating a dental arch model according to claim 17, wherein The generating the support body according to the center point of the support body, the semi-major axis of the ellipsoid of the support body, and a preset radius of curvature includes: Generate an elliptical surface corresponding to the support body according to the semi-major axis of the ellipsoid of the support body and a preset radius of curvature; Rotate the elliptical surface corresponding to the support body 180 degrees around the central axis formed by the semi-major axis of the ellipsoid of the support body and the center point of the support body to generate the support body.

21. The method for generating a dental cast according to claim 1, wherein The specified position corresponds to a occlusal splint generation area determined according to the buccolingual length in the three-dimensional digital dental model. The method further includes: when merging the three-dimensional digital dental model, the convex part, and the support body, if there is a part of the support body that exceeds the occlusal splint generation area, the part of the support body that exceeds the occlusal splint generation area is removed through Boolean operation.

22. The method for generating a dental arch model according to claim 1, wherein The method further includes: performing concave filling on the occlusal splint area in the three-dimensional digital dental model with occlusal splint to obtain a three-dimensional digital dental model with occlusal splint after concave filling.

23. The method for generating a dental arch model according to claim 1, wherein The specified position is within the posterior tooth area of the three-dimensional digital dental model.

24. An electronic device, characterized in that, It includes: At least one processor; And, A memory communicatively connected to the at least one processor; wherein, The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method for generating a dental model as described in any one of claims 1 to 23.

25. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the method for generating a dental model as described in any one of claims 1 to 23.

26. A method for generating an orthodontic appliance, characterized in that, It includes: Generating a three-dimensional digital dental model with occlusal splint according to the method for generating a dental model as described in any one of claims 1 - 23; Manufacturing a shell-shaped body corresponding to the three-dimensional digital dental model with occlusal splint.

27. The orthodontic appliance generation method according to claim 26, wherein The manufacturing of the shell-shaped body corresponding to the three-dimensional digital dental model with occlusal splint includes: Manufacturing a physical model of the three-dimensional digital dental model with occlusal splint by additive manufacturing; According to the physical model of the three-dimensional digital dental model with occlusal splint, manufacturing the shell-shaped body corresponding to the three-dimensional digital dental model with occlusal splint by thermoforming.

28. The method for generating an orthodontic appliance according to claim 26, wherein The manufacturing of the shell-shaped body corresponding to the three-dimensional digital dental model with occlusal splint includes: Generating a digital model of the shell-shaped body corresponding to the three-dimensional digital dental model with occlusal splint according to the three-dimensional digital dental model with occlusal splint; According to the digital model of the shell-shaped body corresponding to the three-dimensional digital dental model with occlusal splint, manufacturing the shell-shaped body corresponding to the three-dimensional digital dental model with occlusal splint by additive manufacturing.

29. A method for generating a jaw pad, characterized in that, It includes: Obtaining the occlusal splint height and obtaining patient tooth data; Generating at least two convex parts for placement at specified positions on the patient's dentition according to the patient tooth data and the occlusal splint height; Generating a support body with a curved surface protruding towards the opposing jaw of the three-dimensional digital dental model between the two convex parts according to the patient tooth data and the occlusal splint height; Merging the convex part and the support body to generate a digital occlusal splint model for placement on the patient's three-dimensional digital dental model.

30. The method for generating a jaw pad according to claim 29, wherein Generating at least two convex parts for placement at specified positions on the patient's dentition according to the patient tooth data and the occlusal splint height, including: Determining the relative positions between the at least two convex parts according to the patient tooth data; Adjusting the tooth parameters in the patient tooth data to obtain adjusted patient tooth data; Generating the at least two convex parts according to the adjusted patient tooth data, the relative positions between the convex parts, and the occlusal splint height.

31. The method for generating a jaw pad according to claim 30, characterized in that, Generating the at least two raised portions according to the relative positions between the adjusted patient tooth data and the raised portions and the height of the occlusal splint includes: Generating a main structure of the raised portion according to tooth parameters in the adjusted patient tooth data and the height of the occlusal splint; Obtaining a jaw target position corresponding to the three-dimensional digital model of the dental arch according to the adjusted patient tooth data; Generating a raised portion jaw position locking structure for guiding the jaw position on the mesial side or the distal side of the main structure of the raised portion according to the relative position between the jaw target position and the raised portion; Generating the at least two raised portions according to the main structure of the raised portion, the raised portion jaw position locking structure and the relative positions between the raised portions.

Images