Dental jaw model bottom support, dental jaw model and dental jaw model set

Abstract

The utility model discloses a dental model collet which is used for bearing a dental model, a plurality of boss structures are arranged on a bearing surface, used for bearing the dental model, of the dental model collet, and the boss structures are matched with groove structures arranged on the bottom surface of the dental model in a concave-convex mode. The end, away from the bearing face, of the boss structure abuts against the end, away from the bottom face of the tooth jaw model, of the groove structure, and a preset gap is formed between the bearing face and the bottom face of the tooth jaw model. The utility model also provides a dental model, and the bottom surface of the dental model is provided with a plurality of groove structures which are matched with the boss structures on the bearing surface of the collet of the dental model in a concave-convex manner. The utility model further provides a tooth jaw model set which comprises the tooth jaw model bottom support and a tooth jaw model. According to the dental model bottom support, the dental model and the dental model set provided by the utility model, the problem of unstable placement caused by uneven printing of the bottom surface of the dental model can be solved, and the cutting precision in the cutting process of an invisible orthodontic appliance can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of dental orthodontics, and more specifically relates to dental instrument manufacturing technology, in particular to a dental jaw model base, a dental jaw model and a dental jaw model set. Background Art

[0002] In the field of dental orthodontic technology, invisible dental appliances based on polymer materials are becoming more and more popular due to their advantages such as beauty, convenience and ease of cleaning. Invisible dental appliances are usually an integrated shell that forms a cavity to accommodate multiple teeth, and the geometry of the cavity is basically consistent with the teeth under the corresponding layout. At present, in the automated processing of invisible dental appliances, it is usually necessary to go through the processes of dental model printing, film preparation, film pressing, dental appliance cutting, and cleaning. In the film pressing process, the dental model is very important. The specific dental model process is to first place the printed dental model on the carrier of the film pressing equipment, and then place the film to be pressed on the heater for preheating, and then cover the heated film on the carrier carrying the dental model, and complete the hot pressing molding by positive pressure or negative pressure to generate an invisible dental appliance with a dental model.

[0003] Among them, the dental model is a three-dimensional model that simulates the patient's dentition. It is crucial in the production of invisible dental braces. Generally, the patient's dentition layout or the image of the teeth and their surrounding tissues can be directly obtained through optical scanning, three-dimensional photography, three-dimensional video or medical CT scanning, and the dental digital model can be obtained after computer processing. Then, the physical dental model is directly printed using the 3D printing process. However, the printing of dental models in the prior art has the following problems: Based on the 3D printing process, in order to facilitate the removal of the printed dental model from the printing workbench of the 3D printing equipment, it is usually necessary to remove the printed dental model from the printing workbench of the 3D printing equipment. Several thin support columns or hollow support frames are printed on the bottom surface to ensure the integrity of the bottom surface of the dental model when the dental model is removed, and to reduce the difficulty and workload of the removal. However, usually during the removal, several thin support columns or hollow support frames are not removed evenly, resulting in an uneven bottom surface of the dental model. When the dental model with an uneven bottom surface is placed on a traditional dental model base, it will be unstable and shaken. In subsequent cutting processes, this will lead to inaccurate cutting, thereby affecting the cutting accuracy of the invisible dental appliance, which will directly lead to a decrease in the yield rate of the invisible dental appliance. Summary of the invention

[0004] The technical problem solved by the utility model is to overcome the defects of the prior art and provide a dental model base, a dental model and a dental model set, which can not only solve the problem of instability after being assembled on the dental model base due to the uneven bottom surface of the dental model, but also improve the cutting accuracy of the invisible dental orthodontic appliance; and can also save 3D printing materials for the dental model, save raw materials and reduce costs.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A dental model base is used to carry a dental model. The dental model base is used to carry a bearing surface of the dental model and is provided with a plurality of boss structures. The boss structures are matched with groove structures arranged on the bottom surface of the dental model. After assembly, one end of the boss structure away from the bearing surface abuts against one end of the groove structure away from the bottom surface of the dental model, and a preset gap is provided between the bearing surface and the bottom surface of the dental model.

[0007] Preferably, the preset gap is always equal in a direction perpendicular to the bearing surface.

[0008] Preferably, the ends of the plurality of boss structures away from the bearing surface are located in the same horizontal plane.

[0009] Preferably, the preset gap ranges from 1 mm to 2 mm.

[0010] Preferably, the outer contour size of the boss structure gradually increases from an end thereof far from the bearing surface to an end thereof adjacent to the bearing surface.

[0011] Preferably, the cross-section of the boss structure has a non-axisymmetric structure, so that the boss structure and the corresponding groove structure on the dental model can be matched and assembled in a predetermined manner.

[0012] Preferably, after assembly, the boss structure is arranged at least corresponding to the area close to the front teeth and the areas close to the back teeth on the left and right sides of the dental model.

[0013] Preferably, there are three boss structures, and the two boss structures corresponding to the left and right sides of the dental model close to the posterior teeth area are symmetrically arranged along a symmetry axis of the boss structure corresponding to the dental model close to the anterior teeth area.

[0014] Preferably, the boss structure is detachably connected to the bearing surface of the dental model base.

[0015] Preferably, magnets with opposite magnetic properties are provided at one end of the boss structure away from the bearing surface and at one end of the groove structure away from the bottom surface of the dental model, so that the boss structure and the groove structure can be adsorbed to each other during assembly.

[0016] In order to achieve the purpose of the utility model, the utility model also provides a dental model, the bottom surface of the dental model is provided with a plurality of groove structures, the groove structure is matched with the boss structure on the supporting surface of the dental model base as described in any one of the above items, and the inner contour shape of the groove structure is consistent with the outer contour shape of the boss structure.

[0017] In order to achieve the purpose of the utility model, the utility model also provides a dental model set, including: a dental model base and a dental model as described in any of the above items; the bottom surface of the dental model is provided with a plurality of groove structures, the groove structure is matched with the boss structure, and the inner contour shape of the groove structure is consistent with the outer contour shape of the boss structure.

[0018] Preferably, a plurality of the boss structures are arranged corresponding to a plurality of the groove structures, wherein the ends of the plurality of the boss structures away from the bearing surface are located in the same horizontal plane, and the ends of the plurality of corresponding groove structures away from the bottom surface of the dental model are located in the same horizontal plane.

[0019] Preferably, a plurality of the boss structures are arranged corresponding to a plurality of the groove structures, wherein the height difference between any two of the boss structures is equal to the depth difference between their corresponding two groove structures.

[0020] Compared with the prior art, the present invention adopts the above technical solution, which has at least one of the following beneficial effects:

[0021] (1) The dental model base provided by the utility model has a plurality of boss structures arranged on its bearing surface; the dental model provided has a plurality of groove structures arranged at corresponding positions on its bottom surface; so that in the assembled dental model set, a preset gap is maintained between the bottom surface of the dental model and the bearing surface of the dental model base. Since the surface area of ​​contact between the groove structure and the boss structure is smaller than the surface area of ​​the entire bottom surface of the dental model, the area and probability of unevenness are greatly reduced. Moreover, the groove structure on the bottom surface of the dental model does not contact the printing workbench of the 3D printing device, and there is no need to print small support columns or hollow support frames. When the printing workbench is shoveled away, there is no residue in the groove structure. On the one hand, by setting the preset gap, the entire bottom surface of the dental model can be prevented from directly contacting the bearing surface of the dental model base, thereby avoiding the problem of unstable placement of the dental model caused by large-area unevenness of the bottom surface of the dental model caused by the 3D printing process. On the other hand, since a plurality of groove structures are arranged on the dental model, the raw materials for 3D printing of the dental model are greatly saved, thereby reducing the production cost.

[0022] (2) The utility model designs the cross-sectional shape of the boss structure to be an asymmetric structure, so that the groove structure and the boss structure can be assembled in a predetermined manner, thereby reducing the probability of trial and error and improving assembly efficiency.

[0023] (3) The utility model designs the outer contour size of the boss structure to be a structure that gradually increases from the end away from the bearing surface to the end adjacent to the bearing surface, and the overall cross-section is trapezoidal; at the same time, the groove structure on the bottom surface of the dental model is designed to match the boss structure, and the corresponding inclined surfaces between the two are in parallel contact, so that the boss structure and the groove structure can be stably assembled and convenient for assembly and disassembly.

[0024] (4) The utility model provides magnets with opposite magnetic properties at one end of the boss structure away from the bearing surface and at one end of the groove structure away from the bottom surface of the dental model. Due to the magnetic attraction, the boss structure and the groove structure are adsorbed on each other during assembly, which is more conducive to improving the accuracy and efficiency of assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same numerical labels represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0026] Figure 1 This is a structural schematic diagram of a dental model set in one embodiment of the utility model;

[0027] Figure 2 It is a structural schematic diagram of a dental model set in another embodiment of the utility model;

[0028] Figure 3 This is a structural schematic diagram of a dental model base in one embodiment of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of a dental jaw model in one embodiment of the utility model;

[0030] Figure 5 It is a structural schematic diagram of a dental model set in another embodiment of the utility model;

[0031] Figure 6 It is a schematic longitudinal section diagram of a boss structure in one embodiment of the utility model;

[0032] Figure 7 It is a longitudinal cross-sectional schematic diagram of a boss structure and a groove structure in one embodiment of the utility model;

[0033] Figure 8 It is a longitudinal cross-sectional schematic diagram of a boss structure and a groove structure in another embodiment of the utility model;

[0034] Fig. 9 It is a longitudinal cross-sectional schematic diagram of a boss structure in another embodiment of the utility model;

[0035] Fig.10 It is a cross-sectional schematic diagram of a boss structure in one embodiment of the utility model;

[0036] Fig.11 It is a structural schematic diagram of a dental model base in another embodiment of the utility model;

[0037] Fig.12 It is a schematic longitudinal section diagram of a boss structure and a groove structure in another embodiment of the utility model. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the various embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings. However, it can be understood by those skilled in the art that in each embodiment of the utility model, many technical details are proposed in order to enable readers to better understand the utility model. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed for protection of the utility model can also be implemented. The division of the following embodiments is for the convenience of description and should not constitute any limitation on the specific implementation of the utility model.

[0039] Directional terms such as "upper", "lower", "left", and "right" used in the description herein are directions in the drawings and do not refer to special limitations. Unless otherwise specified and limited, the term "connection" in this article should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be directly connected or indirectly connected through an intermediate medium.

[0040] The "posterior tooth area" mentioned in each embodiment of the present invention is defined according to the classification of teeth in the second edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 36-38, including premolars and molars, teeth 4-8 in the FDI notation, and teeth 1-3 in the anterior tooth area in the FDI notation. The teeth in the anterior tooth area include central incisors, lateral incisors and canines.

[0041] As can be seen from the background technology, in the prior art, based on the 3D printing process, in order to facilitate the removal of the printed dental model from the printing workbench of the 3D printing equipment, it is usually necessary to print a number of small support columns or hollow support frames on the bottom surface of the dental model, so as to ensure the integrity of the bottom surface of the dental model when removing the dental model, and reduce the difficulty and workload of the removal; however, usually when removing, the several small support columns or hollow support frames are not removed smoothly, resulting in an uneven bottom surface of the dental model. When the dental model with an uneven bottom surface is placed on a traditional dental model base, it will be unstable and shaken. In subsequent cutting processes, such a situation will lead to inaccurate cutting, thereby affecting the cutting accuracy of the invisible dental appliance, which will directly lead to a decrease in the yield rate of the invisible dental appliance.

[0042] Based on this, the applicant proposes a dental model base, a dental model and a dental model set, wherein the bearing surface of the dental model base is provided with a plurality of boss structures; the bottom surface of the dental model is provided with a plurality of groove structures; the boss structure matches the groove structure in a concave-convex manner, and after assembly, the end of the boss structure away from the bearing surface abuts against the end of the groove structure away from the bottom surface of the dental model, and the bearing surface and the bottom surface of the dental model have a preset gap. Through such a structural design, since the surface area of ​​the contact between the groove structure and the boss structure is smaller than the surface area of ​​the entire bottom surface of the dental model, the printing accuracy is better controlled, and the area and probability of unevenness are greatly reduced. On the one hand, by setting the preset gap, the entire bottom surface of the dental model can be avoided from directly contacting the bearing surface of the dental model base, avoiding the problem of unstable placement of the dental model caused by the large area of ​​unevenness of the bottom surface of the dental model caused by the 3D printing process; on the other hand, since a plurality of groove structures are provided on the dental model, the raw materials for 3D printing of the dental model are greatly saved, and the production and manufacturing costs are reduced.

[0043] Example 1

[0044] Please see Figures 1 to 5 As shown, the present application provides a dental model base 100 for carrying a dental model 200, wherein the surface of the dental model base 100 carrying the dental model 200 is a bearing surface S1, and a plurality of boss structures 1 are provided on the bearing surface S1. In some embodiments, the boss structure 1 can be integrally manufactured with the dental model 200 during manufacturing, and the integrally manufactured dental model base 100 is not easy to cause parts to fall off; in other embodiments, the boss structure 1 and the dental model base 100 can also be processed separately, and then installed by detachable means such as concave-convex matching plug-in or threaded connection, and the detachable connection is convenient for timely replacement of the boss structure 1. Since the boss structure 1 is often assembled and disassembled with the groove structure 2 of the bottom surface S2 of the dental model, it is easy to cause wear of the boss structure 1. If the boss structure 1 is replaced in time, there is no need to replace the dental model 200 as a whole, which is conducive to saving the manufacturing materials of the dental model base 100.

[0045] In some embodiments, the preset gap H ranges from 1 mm to 2 mm. In general, as described in the background art, in the 3D printing process, in order to facilitate the removal of the dental model 200 from the printing workbench of the 3D printing device, a number of thin support columns or hollow support frames are usually printed on the bottom surface S2 of the dental model 200. If the preset gap H is less than 1 mm, it is impossible to avoid the contact between these thin support columns or hollow support frames remaining on the bottom surface S2 of the dental model and the bearing surface S1 of the dental model base 100, thereby failing to achieve the purpose of the invention; if the preset gap H is too large, for example, greater than 2 mm, the dental model 200 may be damaged. There is a large gap between the bottom surface S2 of the model and the base 100 of the dental model. During hot pressing, the membrane is easily pressed between the dental model 200 and the bearing surface S1 of the base 100 of the dental model. In this way, the membrane covering the dental model 200 will be over-stretched and extended, resulting in a thin invisible dental appliance, which may easily lead to insufficient correction force and even cause the invisible dental appliance to break. Not only does it require the invisible dental appliance to be reworked, which increases the cost, but if the invisible dental appliance is reworked at the patient's end, it will also bring a bad experience to the patient.

[0046] In some embodiments, please continue to see Figure 2 As shown, the preset gap is always equal in the direction perpendicular to the bearing surface S1. Figure 2The preset gaps at three different positions are illustrated, corresponding to the preset gap H1 at the area close to the front teeth, the preset gap H2 at the middle area, and the preset gap H3 at the area close to the back teeth of the dental model 200, wherein H1=H2=H3. Because the dental model 200 and the dental model base 100 run through various processes in the automated processing of the invisible dental appliance, such a structural design is conducive to the stable assembly of the dental model 200 on the dental model base 100, especially in the hot lamination process. The specific lamination process is to first place the printed dental model 200 on the carrier of the lamination equipment, and then place the film to be laminar on the heater for preheating, and then cover the heated film on the carrier carrying the dental model 200, and complete hot pressing molding in the form of positive pressure or negative pressure to generate an invisible dental appliance with a dental model 200. If the dental model 200 is not placed stably, it will cause the dental model 200 to deflect under the action of positive pressure or negative pressure during lamination, thereby causing the film covering the dental model 200 to be heated inconsistently, which is easy to cause local breakage of the invisible dental appliance, directly affecting the yield rate of the invisible dental appliance.

[0047] In some embodiments, see Figure 6 As shown, the present application designs the ends 11 of the plurality of boss structures 1 away from the bearing surface S1 to be located on the same horizontal plane S3. Such a design can reduce the difficulty of designing and processing the boss structures 1, thereby achieving consistent protruding heights of the boss structures 1.

[0048] In some embodiments, the outer contour size of the boss structure 1 gradually increases from an end 11 away from the bearing surface S1 to an end 12 adjacent to the bearing surface S1. Fig. 9 As shown, the side wall of the boss structure 1 has a first inclined portion 10, and the outer contour size of the boss structure 1 designed in this way gradually increases from the end 11 away from the bearing surface S1 to the end 12 adjacent to the bearing surface S1, and the overall cross-section is trapezoidal; and the matching groove structure 2 can be designed to have a corresponding shape, that is, to have a second inclined portion 20, and the second inclined portion 20 is in parallel contact with the first inclined portion 10, so that the boss structure 1 and the groove structure 2 can be stably assembled and convenient for assembly and disassembly.

[0049] In some embodiments, the cross section of the boss structure 1 has a non-axisymmetric structure, so that the boss structure 1 and the corresponding groove structure 2 on the dental model 200 can be assembled in a predetermined manner. For example, the cross section of the boss structure 1 is roughly a triangle with three unequal sides; for another example, the cross section of the boss structure 1 can also be a non-axisymmetric trapezoid; or Fig.10 The non-axisymmetric "B" shaped structure shown in the figure, or other non-axisymmetric figures. The inner contour of the corresponding groove structure 2 can be designed to have a corresponding shape, so that when placing the dental model 200, the boss structure 1 and the groove structure 2 can only be placed in a unique predetermined manner according to the asymmetric figure, and the placement direction cannot be arbitrarily changed.

[0050] In order to consider the balance of the dental model 200 after assembly, the boss structure 1 is respectively provided in the area of ​​the boss structure 1 corresponding to the dental model 200 close to the front teeth and the areas close to the back teeth on the left and right sides. Figure 3 As shown, there are four boss structures 1, which are respectively arranged corresponding to the positions on the left and right sides of the dental model 200, and the boss structures 1 on the left and right sides are axially symmetrically arranged along a center line L1 of the dental model base 100.

[0051] In some other embodiments, see Fig.11 As shown, there are three boss structures 1, and the two boss structures 1 corresponding to the left and right sides of the dental model 200 near the posterior teeth area are symmetrically arranged along a symmetry axis L2 corresponding to the boss structure 1 near the anterior teeth area of ​​the dental model 200. In some embodiments, a symmetry axis L2 of the boss structure 1 near the anterior teeth area of ​​the dental model 200 can coincide with a center line of the dental model base 100. Based on the principle of stability of the triangular structure, fewer boss structures 1 can be arranged to satisfy the requirement of placing the dental model 200 on the dental model base 100 in a balanced manner.

[0052] In some embodiments, see Fig.12 As shown, the end of the boss structure 1 away from the bearing surface S1 and the end of the groove structure 2 away from the bottom surface S2 of the dental model are respectively provided with magnets 3 with opposite magnetic properties. With such a design, during assembly, the boss structure 1 and the groove structure 2 are attracted to each other magnetically, thereby guiding the assembly of the boss structure 1 and the groove structure 2, making the assembly of the two more convenient and accurate.

[0053] Example 2

[0054] To achieve the technical problem to be solved by this utility model, please continue to refer to Figure 2As shown, the present application also provides a dental model 200, on which a film is covered for hot pressing to form an invisible dental appliance, the dental model 200 includes a dental part 201 consistent with the patient's dentition layout and a support part 202 supporting the dental part 201, the bottom surface S2 of the dental model 200 refers to the surface of the support part 202 away from the dental part 201, and the bottom surface S2 is provided with a plurality of groove structures 2, and the setting positions of the groove structures 2 correspond to the positions of the boss structures 1 on the dental model base 100 in Example 1, and the groove structures 2 are matched with the boss structures 1 on the bearing surface S1 of the dental model base 100 in Example 1, and the inner contour shape of the groove structure 2 is consistent with the outer contour shape of the boss structure 1. In this embodiment, the groove structure 2 is formed by the bottom surface S2 of the dental model 200 being partially concave in a direction away from the bottom surface S2 of the dental model. With such a structural design, since a plurality of groove structures 2 are provided on the bottom surface S2 of the dental model 200 , the raw materials for 3D printing of the dental model can be greatly saved, and the production cost of the dental model 200 can be reduced.

[0055] Example 3

[0056] To achieve the technical problem to be solved by this utility model, please continue to refer to Figure 1 , Figure 2 , Figure 5As shown, the present application also provides a dental model set 1000 of the present application, that is, a set after the dental model 200 is assembled on the dental model base 100 described in Example 1, the dental model 200 and the dental model base 100 are assembled through the concave-convex matching of the groove structure 2 and the boss structure 1, and after assembly, the end of the boss structure 1 away from the bearing surface S1 abuts against the end of the groove structure 2 away from the bottom surface S2 of the dental model, so that a preset gap H is maintained between the bottom surface S2 of the dental model 200 and the bearing surface S1 of the dental model base 100. Among them, the specific structure of the dental model base is consistent with the structure of the dental model base 100 in Example 1, and the inner contour shape of the groove structure 2 on the bottom surface of the dental model 200 is consistent with the outer contour shape of the boss structure 1 on the bearing surface of the dental model base 100, which will not be repeated here. With such a design, since the contact surface area between the groove structure 2 and the boss structure 1 is smaller than the surface area of ​​the entire bottom surface S2 of the dental model, and since the groove structure 2 on the bottom surface of the dental model 200 does not contact the printing workbench of the 3D printing device, and there is no need to print small support columns or hollow support frames, there is no residue after scraping off. After assembly, the area and probability of unevenness are greatly reduced. By setting a preset gap H, the entire bottom surface S2 of the dental model 200 can be prevented from directly contacting the bearing surface S1 of the dental model base 100, thereby avoiding the problem of unstable placement of the dental model 200 caused by the large area of ​​unevenness of the bottom surface S2 of the dental model caused by the 3D printing process.

[0057] In some embodiments, please combine Figure 7 As shown, one end 11 of several boss structures 1 away from the bearing surface S1 is designed to be located on the same horizontal plane S3; correspondingly, one end 21 of several groove structures 2 away from the bottom surface S2 of the dental model is also located on another same horizontal plane S4. This structure is relatively simple and easy to operate in terms of design and processing. Such a design can ensure that the preset gap H is always equal in the direction perpendicular to the bearing surface S1.

[0058] In other embodiments, a plurality of the boss structures 1 are arranged corresponding to a plurality of the groove structures 2. In the present application, a height difference is designed between any two of the boss structures 1, and a depth difference equal to the height difference is also designed between the two corresponding groove structures 2. Such an equal height difference and depth difference design can also achieve that the preset gap H is always equal in the direction perpendicular to the bearing surface S1, that is, it can ensure that the dental model 200 can be placed on the dental model base 100 in a balanced manner. Figure 8As shown, from left to right, the height difference h1 between the first and second boss structures 1 is equal to the depth difference h1' between the corresponding first and second groove structures 2; the height difference h2 between the second and third boss structures 1 is equal to the depth difference h2' between the corresponding second and third groove structures 2.

[0059] It should be noted that the above embodiments can be freely combined as needed to form different new implementation plans without causing any contradiction. The implementation plans formed after such combination are all within the scope of protection of this application. In order to save the length of the application text, they will not be repeated here.

[0060] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the creative principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present application.

[0061] Similarly, the above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A dental model base, used to carry a dental model, characterized in that: The dental model base is used to support the dental model and has a bearing surface with a plurality of boss structures, the boss structures are matched with the groove structures arranged on the bottom surface of the dental model, after assembly, one end of the boss structure away from the bearing surface abuts against one end of the groove structure away from the bottom surface of the dental model, and the bearing surface and the bottom surface of the dental model have a preset gap.

2. The dental model base according to claim 1, characterized in that: The preset gap is always equal in a direction perpendicular to the bearing surface.

3. The dental model base according to claim 2, characterized in that: Ends of the plurality of boss structures away from the bearing surface are located in the same horizontal plane.

4. The dental model base according to claim 1 or 2, characterized in that: The preset gap ranges from 1 mm to 2 mm.

5. The dental model base according to claim 1, characterized in that: The outer contour size of the boss structure gradually increases from an end thereof away from the bearing surface to an end thereof adjacent to the bearing surface.

6. The dental model base according to claim 1, characterized in that: The cross section of the boss structure has a non-axisymmetric structure, so that the boss structure and the corresponding groove structure on the dental model can be matched and assembled in a predetermined manner.

7. The dental model base according to claim 1, characterized in that: After assembly, the boss structure is at least respectively arranged corresponding to the area close to the front teeth and the areas close to the back teeth on the left and right sides of the dental model.

8. The dental model base according to claim 7, characterized in that: There are three boss structures, and two boss structures corresponding to the left and right sides of the dental model close to the posterior teeth area are symmetrically arranged along a symmetry axis of the boss structure corresponding to the dental model close to the anterior teeth area.

9. The dental model base according to claim 1, characterized in that: The boss structure is detachably connected to the bearing surface of the dental model base.

10. The dental model base according to claim 1, characterized in that: One end of the boss structure away from the bearing surface and one end of the groove structure away from the bottom surface of the dental model are respectively provided with magnets with opposite magnetic properties, so that the boss structure and the groove structure are adsorbed to each other during assembly.

11. A dental model, characterized in that: The bottom surface of the dental model is provided with a plurality of groove structures, and the groove structures are matched with the boss structures on the dental model base bearing surface according to any one of claims 1 to 10, and the inner contour shape of the groove structures is consistent with the outer contour shape of the boss structures.

12. A dental model set, characterized in that: include: A dental model base and a dental model according to any one of claims 1 to 10; the bottom surface of the dental model is provided with a plurality of groove structures, the groove structures are concavely matched with the boss structures, and the inner contour shape of the groove structures is consistent with the outer contour shape of the boss structure.

13. The dental model set according to claim 12, characterized in that: A plurality of the boss structures are arranged corresponding to a plurality of the groove structures, wherein the ends of the plurality of the boss structures away from the bearing surface are located in the same horizontal plane, and the ends of the plurality of corresponding groove structures away from the bottom surface of the dental model are located in the same horizontal plane.

14. The dental model set according to claim 12, characterized in that: A plurality of the boss structures are arranged corresponding to a plurality of the groove structures, wherein a height difference between any two of the boss structures is equal to a depth difference between the corresponding two of the groove structures.

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