Complete denture teaching aid

Abstract

The utility model discloses a complete denture teaching aid. An upper jaw bone and a zygomatic arch are integrally connected, and the upper jaw bone and a lower jaw bone are oppositely arranged at intervals; the upper false tooth is detachably connected with the upper jawbone, and the lower false tooth is detachably connected with the lower jawbone; the two telescopic pieces are fixedly connected to the side portion of the zygomatic arch and the side portion of the mandible respectively, and the fixed ends of the two telescopic pieces are connected to the periphery of the outer side of the zygomatic arch and the top of the outer side of the mandible respectively. The adjusting parts are arranged among the corresponding telescopic parts, the zygomatic arch and the mandible in a suspended mode, and the adjusting parts are fixedly connected with the movable ends of the corresponding telescopic parts respectively. The upper jawbone is integrally connected with the zygomatic arch and is arranged opposite to the lower jawbone at an interval, and the upper jawbone and the lower jawbone in a real oral cavity are simulated. The upper false tooth and the lower false tooth are detachably connected to the upper jawbone and the lower jawbone respectively and are used for simulating and replacing missing teeth. The stretching length and angle of the telescopic piece are controlled through the adjusting piece, and the relative distance and position relation between the maxilla and the mandible are adjusted, so that the alignment process of the maxilla and the mandible is displayed in real time.

Description

Technical Field

[0001] This application relates to the field of medical model technology, and in particular to a complete denture teaching aid. Background Technology

[0002] In the current technological context, traditional two-dimensional teaching tools for complete dentures only have the function of demonstrating the changes in the position of the mandible in edentulous patients under the traction of elastic materials such as springs and rubber bands. That is, they can demonstrate the shift in the position of the mandible due to missing teeth before wearing complete dentures, and the scenario where the distance between the mandible and the maxilla returns to normal after wearing them.

[0003] However, this two-dimensional teaching aid has a significant drawback: when complete dentures (including upper and lower dentures) are removed, it cannot visually demonstrate the actual real-time dynamic changes in the relative position and distance between the mandible and maxilla under traction. In clinical practice, the generation of this traction force is complex, often resulting from a combination of factors such as the patient's muscle activity, joint movement, and personal habits.

[0004] Therefore, there is an urgent need for a new type of teaching tool for complete dentures to overcome the limitations of existing two-dimensional teaching aids. Utility Model Content

[0005] This application provides a complete denture teaching aid designed to ensure that the real-time positional changes of the mandible and its relationship with the complete denture can be fully demonstrated.

[0006] To achieve the above objectives, this application provides the following technical solutions:

[0007] A complete denture teaching device includes a zygomatic arch, maxilla, mandible, upper denture, lower denture, two telescopic components, and an adjustment component;

[0008] The maxilla is integrated with the zygomatic arch and is spaced apart from the mandible;

[0009] The side of the upper denture furthest from the mandible is detached and connected to the bottom of the maxilla, while the side of the lower denture furthest from the maxilla is detached and connected to the top of the mandible.

[0010] Two telescopic components are fixedly connected to the sides of the zygomatic arch and the mandible, respectively, and the fixed ends of the two telescopic components are connected to the outer periphery of the zygomatic arch and the outer top of the mandible, respectively.

[0011] The adjusting component is suspended between the corresponding telescopic component and the zygomatic arch and mandible, and the output end of the adjusting component is fixedly connected to the movable end of the corresponding telescopic component.

[0012] Further adjustment components include the housing, pivot, and rotating cover;

[0013] The outer casing is fixedly positioned between the movable ends of the two telescopic components;

[0014] The rotating shaft is located inside the housing, and the bottom of the rotating shaft is fixedly connected to the movable end of the telescopic component. The top of the rotating shaft passes vertically through the housing and is rotatably connected to the top of the housing.

[0015] The rotating cover is fixedly mounted on the top of the rotating shaft, and the edge of the rotating cover is engaged with the top circumference of the outer casing.

[0016] Furthermore, a toothed groove is provided inward at the connection between the outer shell and the rotating cover, and an elastic tooth extends inward along the edge of the rotating cover, with the tooth surface of the elastic tooth abutting against the groove surface of the toothed groove.

[0017] Furthermore, a first slot for installing an upper denture is provided at the bottom of the maxilla, and a second slot for installing a lower denture is provided at the top of the mandible.

[0018] Furthermore, the top of the upper denture is provided with a third slot for installing the first clasp, with the opening of the third slot facing away from the mandible, and the bottom of the lower denture is provided with a fourth slot for installing the second clasp; the opening of the fourth slot faces towards the side closer to the maxilla.

[0019] Furthermore, the first locking block is vertically positioned within the third locking groove, and the middle part of the first locking block is hinged to one side wall of the third locking groove, while the circumferential surface of its end near the maxilla is engaged with the wall of the first locking groove.

[0020] The second locking block is vertically positioned within the fourth locking slot, with its middle portion hinged to one side wall of the fourth locking slot, and its circumferential surface near the mandible engaging with the wall of the second locking slot.

[0021] Furthermore, a first elastic element is provided at the end of the first locking block away from the maxilla. One end of the first elastic element is fixedly connected to the bottom of the first locking block, and the other end is fixedly connected to the groove wall of the first locking groove.

[0022] The second locking block has a second elastic element at the end furthest from the mandible. One end of the second elastic element is fixedly connected to the bottom of the second locking block, and the other end is fixedly connected to the wall of the second locking groove.

[0023] Furthermore, the walls of both the first and second card slots are curved, with the highest point of curvature of the first card slot wall abutting against the corresponding side of the first card block; and the highest point of curvature of the second card slot wall abutting against the corresponding side of the second card block.

[0024] One or more technical solutions provided in the embodiments of this utility model have at least the following technical effects:

[0025] The complete denture teaching aid in this application mainly consists of a zygomatic arch, mandible, upper denture, lower denture, telescopic component, and adjustable component. The zygomatic arch and mandible are positioned at intervals to simulate the upper and lower jaws in a real oral cavity. The upper and lower dentures are detachably connected to the bottom of the zygomatic arch and the top of the mandible, respectively, to simulate and replace missing teeth. The fixed ends of the telescopic components are connected to the outer top of the zygomatic arch and the outer bottom of the mandible, respectively, allowing the telescopic components to extend and retract within a certain range. The output end of the adjustable component is fixedly connected to the movable end of the telescopic component. By adjusting the adjustable component, the extension length and angle of the telescopic component can be controlled, adjusting the relative distance and positional relationship between the zygomatic arch and the mandible, thereby demonstrating the alignment relationship between the upper and lower dentures and the upper and lower jaws in real time. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments of this utility model or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 Schematic diagram of the structure of the complete denture teaching apparatus provided in the embodiments of this application Figure 1 ;

[0028] Figure 2 for Figure 1 Structural diagram of the adjusting component and the telescopic component;

[0029] Figure 3 for Figure 2 A magnified view of a portion of region A in the middle;

[0030] Figure 4 Schematic diagram of the structure of the complete denture teaching apparatus provided in the embodiments of this application Figure 2 ;

[0031] Figure 5 for Figure 4 Structural diagram of the adjusting component and the telescopic component;

[0032] Figure 6 This is a schematic diagram of the structure of the maxilla in the edentulous state provided in the embodiments of this application;

[0033] Figure 7 for Figure 6 A sectional view of region C in the diagram;

[0034] Figure 8 A schematic diagram of the structure of the mandibular denture in the edentulous state provided in an embodiment of this application;

[0035] Figure 9for Figure 8 A sectional view of region D in the diagram;

[0036] Figure 10 A schematic diagram of the connection between the zygomatic arch and the upper denture provided in an embodiment of this application;

[0037] Figure 11 for Figure 10 A partial sectional view of region E in the diagram;

[0038] Figure 12 This is a schematic diagram of the connection between the mandible and the lower denture provided in an embodiment of this application.

[0039] Figure 13 for Figure 12 A partial sectional view of region F in the diagram.

[0040] Icons: 10-Zygomatic arch; 11-Maxilla; 12-First slot; 20-Mandible; 21-Second slot; 30-Upper denture; 31-First clasp; 32-Third slot; 40-Lower denture; 41-Second clasp; 42-Fourth slot; 50-Telescopic component; 60-Adjusting component; 61-Outer shell; 612-Alveolar groove; 62-Spindle; 63-Swivel cover; 631-Elastic tooth; 70-First elastic component; 71-Second elastic component; 80-Condyle. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0042] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0043] Combination Figures 1-13 A complete denture teaching aid, characterized in that it comprises a zygomatic arch 10, a maxilla 11, a mandible 20, an upper denture 30, a lower denture 40, two telescopic components 50, and an adjusting component 60; the maxilla 11 is integrally connected to the zygomatic arch 10 and is spaced apart from the mandible 20; the side of the upper denture 30 away from the mandible 20 is detachably connected to the bottom of the maxilla 11, and the side of the lower denture 40 away from the maxilla 11 is detachably connected to the top of the mandible 20; the two telescopic components 50 are respectively fixedly connected to the sides of the zygomatic arch 10 and the mandible 20, and the fixed ends of the telescopic components 50 are fixedly connected to the outer periphery of the zygomatic arch 10 and the outer top of the mandible 20; the adjusting components 60 are respectively suspended between the corresponding telescopic components 50 and the zygomatic arch 10 and the mandible 20, and the output ends of the adjusting components 60 are respectively fixedly connected to the movable ends of the corresponding telescopic components 50.

[0044] In the above scheme, the maxilla 11 is integrally connected to the zygomatic arch 10 and is spaced apart from the mandible 20 to simulate the upper and lower jaws in a real oral cavity. The upper denture 30 and the lower denture 40 are detachably connected to the bottom of the zygomatic arch 10 and the top of the mandible 20, respectively, to simulate and replace missing teeth. The fixed end of the telescopic component 50 is connected to the outer top of the zygomatic arch 10 and the outer bottom of the mandible 20, respectively, so that the telescopic component 50 can extend or retract in the adjustment direction of the adjusting component. The output end of the adjusting component 60 is fixedly connected to the movable end of the telescopic component 50. By adjusting the adjusting component 60, the telescopic length of the telescopic component 50 can be controlled, and the relative distance and positional relationship between the zygomatic arch 10 and the mandible 20 can be adjusted, thereby displaying the real-time positional changes when the upper denture 20 is connected to the maxilla 11 and the lower denture 40 is connected to the mandible 20.

[0045] In this application, one end of the telescopic component 50, away from the adjusting component 60, is fixedly connected to the side of the zygomatic arch 10, and the other end of the telescopic component 50, away from the adjusting component 60, is fixedly connected to the mandible 20 near the condyle 80. Furthermore, the two adjusting components 60 and the telescopic component 50 in this application can be separately divided into two sets of structurally identical adjusting components, and fixedly connected to the corresponding sides of the zygomatic arch 10 and the mandible 20 respectively, jointly adjusting the opening and closing degree of the maxilla 11 and the mandible 20. Alternatively, the two adjusting components 60 and the telescopic component 50 can also function as a single adjusting component to achieve adjustment of the opening and closing of the maxilla 11 and the mandible 20.

[0046] The adjusting component 60 includes a housing 61, a rotating shaft 62, and a rotating cover 63. The housing 61 is fixedly disposed between the movable ends of the two telescopic components 50. The rotating shaft 62 is disposed inside the housing 61, and the bottom of the rotating shaft 62 is fixedly connected to the movable end of the telescopic component 50. The top of the rotating shaft 62 passes vertically through the housing 61 and is rotatably connected to the top of the housing 61. The rotating cover 63 is fixedly disposed on the top of the rotating shaft 62, and the edge of the rotating cover 63 is engaged with the top circumferential surface of the housing 61.

[0047] In the above-described scheme, the top of the adjustable member swivel 62 passes through the top of the housing 61 and is rotatably connected to the top of the housing 61, allowing the swivel 62 to rotate inside the housing 61 while maintaining its top (i.e., the rotating cover 63) rotatable relative to the housing 61. The snap-fit ​​design between the edge of the rotating cover 63 and the top circumference of the housing 61 ensures that the rotating cover 63 is securely locked when rotated to the closed position, while preventing dust or moisture from entering. When it is necessary to change the relative position of the zygomatic arch 10 and the mandible 20 to adjust the opening degree of the maxilla 11 and the mandible 20, the operator only needs to manually rotate the rotating cover 63.

[0048] In practice, the two telescopic members 50 in this application are springs. The two telescopic members 50 are vertically connected to the zygomatic arch 10 and the mandible 20. One end of one telescopic member 50 is fixedly connected to the zygomatic arch 10, and the other end is fixedly connected to one side of the rotating shaft 62. One end of the other telescopic member 50 is connected to the mandible 20, and the other end is fixedly connected to the opposite side of the rotating shaft 62.

[0049] In this application, the two telescopic components 50 are telescopic rods with racks on their circumferential surfaces. The bottom circumferential surface of the rotating shaft 62 is recessed with toothed grooves. One end of one telescopic component 50 is fixedly connected to the zygomatic arch 10, and the other end meshes with the teeth on the circumferential surface of the rotating shaft 62. One end of the other telescopic component 50 is fixedly connected to the mandible 20, and the other end meshes with the teeth on the circumferential surface of the rotating shaft 62. The two telescopic components 50 are staggered vertically in the vertical plane to avoid interference between them when they rotate.

[0050] The outer shell 61 and the rotating cover 63 are connected inwardly with a toothed groove 612. The cover edge of the rotating cover 63 extends inwardly with an elastic tooth 631. The tooth surface of the elastic tooth 631 abuts against the groove surface of the toothed groove 612.

[0051] In the above solution, the tight fit between the elastic teeth 631 and the toothed groove 612 ensures a more secure and stable connection between the rotating cover 63 and the outer shell 61, while preventing the rotating cover 63 from falling off or loosening during use. Due to the tight fit and mutual restraint between the elastic teeth 631 and the toothed groove 612, noise and vibration generated during the rotation or movement of the rotating cover 63 are effectively reduced, thereby extending the service life of the adjusting component 60.

[0052] The bottom of the maxilla 11 has a first slot 12 for installing the upper denture 30, and the top of the mandible 20 has a second slot 21 for installing the lower denture 40.

[0053] In the above scheme, a first slot 12 is provided at the bottom of the maxilla 11, so that the upper denture 30 can be precisely embedded or fixed in the first slot 12, thereby ensuring the stability and positional accuracy of the upper denture 30 on the maxilla 11. A second slot 21 is provided at the top of the mandible 20, so that the lower denture 40 can be precisely embedded or fixed in the second slot 21, thereby achieving stable installation of the lower denture 40 on the mandible 20.

[0054] The top of the upper denture 30 is provided with a third slot 32 for installing the first slot 31, and the opening of the third slot 32 faces away from the mandible 20. The bottom of the lower denture 40 is provided with a fourth slot 42 for installing the second slot 41, and the opening of the fourth slot 42 faces closer to the maxilla 11.

[0055] In the above scheme, when the upper denture 30 is installed on the maxilla 11, the position of the third slot 32 allows the first locking block 31 to face or contact the maxillary region. When the lower denture 40 is installed on the mandible 20, the fourth slot 42 and the second locking block 41 within it will not directly interfere with the maxillary region, and may provide additional stability or connection points for the lower denture 40. The placement of the third slot 32 and the fourth slot 42 reduces the loosening or displacement of the upper denture 30 and the lower denture 40 during use, while facilitating the installation and removal of the upper denture 30 from the maxilla 11 and the lower denture 40 from the mandible 20.

[0056] The first locking block 31 is vertically disposed in the third locking groove 32, and the middle part of the first locking block 31 is hinged to one side wall of the third locking groove 32, and the peripheral surface of its end near the maxilla 11 is engaged with the groove wall of the first locking groove 12; the second locking block 41 is vertically disposed in the fourth locking groove 42, and the middle part of the second locking block 41 is hinged to one side wall of the fourth locking groove 42, and the peripheral surface of its end near the mandible 20 is engaged with the groove wall of the second locking groove 21.

[0057] In the above scheme, the first locking block 31 can rotate around the hinge point within a certain range. When the upper denture 30 is installed in the first slot 12 of the zygomatic arch 10, the circumferential surface of the end of the first locking block 31 near the maxilla 11 will engage with the slot wall of the first slot 12. The second locking block 41 can also rotate around the hinge point within a certain range. When the lower denture 40 is installed in the second slot 21 of the mandible 20, the circumferential surface of the end of the second locking block 41 near the mandible 20 will engage with the slot wall of the second slot 21. Through the hinge design and engagement relationship of the first locking block 31 and the second locking block 41, the upper denture 30 and the lower denture 40 can not only obtain stability through the direct connection between the first slot 12, the second slot 21 and the bone structure of the maxillary ramus 10 and the mandible 20, but also obtain additional fixation and fine-tuning capabilities through the engagement relationship between the first locking block 31 and the slot wall of the first slot 12, and the second locking block 41 and the slot wall of the second slot 21.

[0058] The first locking block 31 has a first elastic element 70 at the end away from the maxilla 11. One end of the first elastic element 70 is fixedly connected to the bottom of the first locking block 31, and the other end is fixedly connected to the groove wall of the first locking groove 12. The second locking block 41 has a second elastic element 71 at the end away from the mandible 20. One end of the second elastic element 71 is fixedly connected to the bottom of the second locking block 41, and the other end is fixedly connected to the groove wall of the second locking groove 21.

[0059] In the above scheme, when the upper denture 30 is installed in the first slot 12 of the maxilla 11, the end of the first locking block 31 near the zygomatic arch 10 will engage with the groove wall of the first slot 12. At this time, the first elastic element 70 is in a compressed or stretched state, applying an inward or outward force to the first locking block 31 to ensure that the first locking block 31 maintains a tight engagement with the groove wall of the first slot 12. When it is necessary to remove the upper denture 30, the elastic force of the first elastic element 70 can assist the first locking block 31 in disengaging from the groove wall of the first slot 12.

[0060] When the lower denture 40 is installed in the second slot 21 of the mandible 20, the end of the second locking block 41 near the mandible 20 will engage with the wall of the second slot 21. At this time, the second elastic element 71 will also be in a compressed or stretched state, applying an inward or outward force to the second locking block 41 to ensure a tight engagement with the wall of the second slot 21. When it is necessary to remove the lower denture 40, the elasticity of the second elastic element 71 can assist the second locking block 41 in disengaging from the wall of the second slot 21.

[0061] The first elastic element 70 and the second elastic element 71 provide additional stability to the connection between the upper denture 30 and the maxilla 11, and the lower denture 40 and the mandible 20. Through deformation capability, they ensure a tight engagement between the first slot 12 and the first locking block 31, and between the second slot 21 and the second locking block 41, thereby reducing the loosening or displacement of the upper denture 30 and the lower denture 40 during use.

[0062] The walls of the first slot 12 and the second slot 21 are both curved. The highest point of curvature of the wall of the first slot 12 abuts against the corresponding side of the first card block 31; the highest point of curvature of the wall of the second slot 21 abuts against the corresponding side of the second card block 41.

[0063] In the above scheme, when the first locking block 31 and the second locking block 41 are inserted into the first locking slot 12 and the second locking slot 21 respectively, their peripheral surfaces will contact the slot walls. Since the slot walls are curved, the first locking block 31 and the second locking block 41 will gradually enter the cavity of the first locking slot 12 and the second locking slot 21 along the curved surface during insertion, until they reach the highest point of the corresponding slot wall. At this time, the peripheral surface of the first locking block 31 will tightly abut against the highest point of the first slot wall 12, and the peripheral surface of the second locking block 41 will tightly abut against the highest point of the second locking slot 21. This not only provides the necessary locking force but also ensures the stability and firmness of the connection. In addition, the curved slot wall design helps reduce friction and wear between the locking blocks and the slots. When the first locking block 31 and the second locking block 41 move in the first locking slot 12 and the second locking slot 21 or are subjected to external forces, the curved slot wall can provide a smoother transition, thereby reducing wear and noise.

[0064] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0065] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. A complete denture teaching aid, characterized in that, Includes zygomatic arch (10), maxilla (11), mandible (20), upper denture (30), lower denture (40), two telescopic components (50) and adjustment component (60); The maxilla (11) is integrally connected to the zygomatic arch (10) and is spaced apart from the mandible (20); The upper denture (30) is detachably connected to the bottom of the maxilla (11) on the side away from the mandible (20), and the lower denture (40) is detachably connected to the top of the mandible (20) on the side away from the maxilla (11). The two telescopic components (50) are respectively fixedly connected to the sides of the zygomatic arch (10) and the mandible (20), and the fixed ends of the two telescopic components (50) are respectively connected to the outer periphery of the zygomatic arch (10) and the outer top of the mandible (20); The adjusting member (60) is suspended between the corresponding telescopic member (50), the zygomatic arch (10), and the mandible (20), and the output end of the adjusting member (60) is fixedly connected to the movable end of the corresponding telescopic member (50).

2. The complete denture teaching apparatus according to claim 1, characterized in that, The adjusting component (60) includes a housing (61), a rotating shaft (62), and a rotating cover (63). The outer shell (61) is fixedly disposed between the movable ends of the two telescopic members (50); The rotating shaft (62) is disposed inside the outer shell (61), and the bottom of the rotating shaft (62) is fixedly connected to the movable end of the telescopic member (50). The top of the rotating shaft (62) passes vertically through the outer shell (61) and is rotatably connected to the top of the outer shell (61). The rotating cover (63) is fixedly disposed on the top of the rotating shaft (62), and the edge of the rotating cover (63) is engaged with the top circumferential surface of the outer shell (61).

3. The complete denture teaching apparatus according to claim 2, characterized in that, The outer shell (61) and the rotating cover (63) are connected with an inwardly formed toothed groove (612), and the cover edge of the rotating cover (63) extends inwardly with an elastic tooth (631), the tooth surface of the elastic tooth (631) abutting against the groove surface of the toothed groove (612).

4. The complete denture teaching apparatus according to claim 3, characterized in that, The bottom of the maxilla (11) is provided with a first slot (12) for installing the upper denture (30), and the top of the mandible (20) is provided with a second slot (21) for installing the lower denture (40).

5. The complete denture teaching apparatus according to claim 4, characterized in that, The top of the upper denture (30) is provided with a third slot (32) for installing the first clasp (31), and the opening of the third slot (32) faces away from the mandible (20). The bottom of the lower denture (40) is provided with a fourth slot (42) for installing the second clasp (41); the opening of the fourth slot (42) faces closer to the maxilla (11).

6. The complete denture teaching apparatus according to claim 5, characterized in that, The first card block (31) is vertically disposed in the third card slot (32), and the middle part of the first card block (31) is hinged to one side wall of the third card slot (32), and the peripheral surface of its end near the maxilla (11) is engaged with the wall of the first card slot (12). The second locking block (41) is vertically disposed in the fourth locking groove (42), and the middle part of the second locking block (41) is hinged to one side of the groove wall of the fourth locking groove (42), and the peripheral surface of its end near the mandible (20) is engaged with the groove wall of the second locking groove (21).

7. The complete denture teaching apparatus according to claim 6, characterized in that, The first card block (31) is provided with a first elastic element (70) at one end away from the maxilla (11). One end of the first elastic element (70) is fixedly connected to the bottom of the first card block (31), and the other end is fixedly connected to the groove wall of the first card slot (12). The second card block (41) is provided with a second elastic element (71) at one end away from the mandible (20). One end of the second elastic element (71) is fixedly connected to the bottom of the second card block (41), and the other end is fixedly connected to the groove wall of the second card slot (21).

8. The complete denture teaching apparatus according to claim 7, characterized in that, The groove walls of the first groove (12) and the second groove (21) are both curved. The highest point of curvature of the groove wall of the first groove (12) abuts against the corresponding side of the first card block (31); the highest point of curvature of the groove wall of the second groove (21) abuts against the corresponding side of the second card block (41).

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