A fracture-resistant invisible partial denture and a preparation device thereof

Abstract

The present invention discloses a fracture-resistant invisible partial denture and a preparation device thereof, comprising an artificial tooth, a lingual-palatal metal bridge frame and a labial-buccal resin, wherein the lingual-palatal metal bridge frame is composed of a lingual-palatal metal back plate and a occlusal support, wherein the lingual-palatal metal back plate is in close contact with the lingual-palatal side of the abutment, and the occlusal support is located on the occlusal surface of the abutment. The lingual-palatal metal part of the present invention is very thin, and the patient does not have a strong foreign body sensation during wearing, and is relatively comfortable. The lingual-palatal metal part is provided to enhance the denture structure and to allow the occlusal support to resist the bite force, thereby avoiding relying solely on the mucosa to improve the chewing function. The metal part is in close contact with the lingual-palatal side, which can not only play an effective lingual resistance, but also prevent the denture from deforming and dislocating. The improved elastic denture adds a metal lingual-palatal metal back plate and an occlusal support for retention or dispersion of the bite pressure, thereby expanding the clinical indications.

Description

Technical Field

[0001] The present invention relates to the technical field of dentures, and in particular to a fracture-resistant invisible partial denture and a preparation device thereof. Background Art

[0002] Invisible dentures, also known as invisible dentures or transparent dentures, are a type of prosthesis used to replace missing teeth. Invisible dentures use elastic resins that are close in color to natural gums and look similar to natural teeth. Therefore, there are no metal clasps when wearing them, which makes them more aesthetically pleasing overall. Invisible dentures require less tooth removal, or even no removal, which ensures the integrity of the patient's other teeth.

[0003] For example, the Chinese utility model patent with application number: 202023034838.2, entitled "An improved new denture base", discloses an improved new denture base. By arranging force rods and force connecting parts inside the base body, the artificial tooth will be transmitted to the force rod through the force connecting parts after the force is applied, and the force rod can transmit the local force evenly, thereby avoiding local tingling and ensuring the service life of the artificial tooth; by providing a reinforcing rod, the strength of the base body can be effectively improved, thereby improving the toughness and bending resistance of the base body, and avoiding the base body from being broken due to excessive force.

[0004] The shortcomings of the existing technology are that invisible dentures are mainly suitable for the repair of single or a few front teeth. For the situation of multiple missing teeth or missing back teeth, because there is no metal clasp to retain or disperse the occlusal pressure, it is simply supported by the mucosa. The chewing pressure will accelerate the absorption of the alveolar bone in the edentulous area, resulting in a decrease in bone mass in the edentulous area, which is easy to cause mucosal tenderness. The retention force and stability are insufficient and it is not suitable for use. Summary of the invention

[0005] The object of the present invention is to provide a fracture-resistant invisible partial denture and a preparation device thereof, so as to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: an anti-fracture invisible partial denture, comprising artificial teeth, a lingual-palatal metal bridge frame and a labial-buccal resin, wherein the lingual-palatal metal bridge frame is composed of a lingual-palatal metal back plate and an occlusal support, wherein the lingual-palatal metal back plate is in close contact with the lingual-palatal side of the abutment tooth, and the occlusal support is located on the occlusal surface of the abutment tooth.

[0007] As a further description of the above technical solution:

[0008] The labial and buccal resin is fixed on the undercut of the abutment tooth.

[0009] A preparation device for anti-fracture invisible partial dentures, which is used to prepare the above-mentioned dentures, comprises a preparation frame and a rectangular conveyor belt arranged in the preparation frame, and a passive conveyor belt is also arranged on one side of the preparation frame; a plurality of conveyor frames are equidistantly arranged on the rectangular conveyor belt, and a mold frame is installed in the conveyor frame through a clamping assembly; it also comprises a demoulding assembly, a trigger mechanism and a kinetic energy assembly, which are arranged on the preparation frame; when the rectangular conveyor belt stops working intermittently, the trigger mechanism triggers the demoulding assembly to demould one of the mold frames, and releases the limitation of the clamping assembly in another conveying frame through the unlocking assembly, so that the mold frame falls onto the passive conveyor belt, and then the passive conveyor belt is driven by the kinetic energy assembly to transport the mold frame; the trigger mechanism comprises a moving plate slidably connected to the preparation frame, a baffle is fixedly connected to one side of the moving plate, and a connecting spring is arranged between the baffle and the preparation frame; the moving plate is connected to the demoulding assembly through a first driving unit, and the baffle is connected to the clamping assembly through a second driving unit.

[0010] As a further description of the above technical solution:

[0011] The demoulding assembly includes an external frame fixedly connected to the preparation frame, and a plurality of demoulding rods are slidably connected to the external frame, and one end of the plurality of demoulding rods is fixedly connected to the same fixed frame; the first driving unit includes a vertical rod fixedly connected to the fixed frame, a wave groove is opened on the movable plate, and the vertical rod is slidably connected in the wave groove.

[0012] As a further description of the above technical solution:

[0013] The clamping assembly includes a wedge block slidably connected to the conveying frame, and an abutment spring is arranged between the wedge block and the conveying frame; the unlocking assembly includes a long inclined rod slidably connected to the conveying frame, a limit plate and a push plate are fixedly connected to the long inclined rod, a limit spring is arranged between the limit plate and the conveying frame, an unlocking rod is fixedly connected to the limit plate, a rectangular block is fixedly connected to the wedge block via a connecting rod, an inclined groove is opened on the rectangular block, and the movement stroke of the unlocking rod contacts the inclined groove.

[0014] As a further description of the above technical solution:

[0015] The second driving unit comprises a support plate fixedly connected to the baffle plate, an unlocking block fixedly connected to the support plate, and the unlocking block contacts the inclined long rod during the movement of the unlocking block.

[0016] As a further description of the above technical solution:

[0017] The kinetic energy component includes a mounting block fixedly connected to the preparation frame, a sliding rod slidably connected to the mounting block, two ends of the sliding rod are respectively fixedly connected to an annular long frame and a side plate, and an auxiliary spring is arranged between the side plate and the mounting block; a crank is fixedly connected to the transmission shaft of the passive conveyor belt, a slider is arranged on the crank, the slider is slidably connected to the annular long frame, a first protrusion block is fixedly connected to the side plate, and a plurality of second protrusion blocks distributed in a linear array are fixedly connected to the support plate, and the plurality of second protrusion blocks contact the first protrusion block in sequence during the movement stroke.

[0018] As a further description of the above technical solution:

[0019] An injection molding component is arranged on the preparation frame, and the injection molding component includes a mounting table fixedly connected to the preparation frame, an injection molding machine is fixedly connected to the mounting table through an electric telescopic rod, and an injection molding plate is arranged on the injection molding machine; a passive plate and an extrusion plate are slidably connected to the mounting table, the passive plate is connected to the injection molding plate through an L-shaped plate, and a cross frame is arranged between the passive plate and the extrusion plate.

[0020] As a further description of the above technical solution:

[0021] The preparation frame is also provided with a driving assembly, which includes an active rotating rod arranged on the preparation frame, and a residual gear and a cam are arranged on the active rotating rod; a full gear is arranged on the transmission shaft of the rectangular conveyor belt, and the residual gear meshes with the full gear during the movement stroke; an abutment plate is fixedly connected to one side of the movable plate, and the cam is in contact with the abutment plate.

[0022] As a further description of the above technical solution:

[0023] The preparation frame is also provided with a rotating guide plate, and the preparation frame is also connected with a cleaning frame.

[0024] In the above technical solution, the anti-fracture invisible partial denture and the preparation device thereof provided by the present invention have the following beneficial effects:

[0025] The metal part on the tongue and palate in the present invention is very thin, and the patient does not have a strong foreign body sensation during wearing, and it is relatively comfortable. By setting the metal part on the tongue and palate, the denture structure can be strengthened, and the support can be combined to resist the bite force, avoiding relying solely on the mucosa to improve the chewing function. The metal part is close to the tongue and palate, which can not only play an effective tongue-side confrontation, but also prevent the denture from deforming and dislocating. The improved elastic denture adds a metal tongue and palate metal back plate and a support to retain or disperse the bite pressure, thereby expanding the clinical indications.

[0026] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0027] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0029] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the structure of the tongue-palatal metal bridge provided in an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of the structure of a denture preparation device provided in an embodiment of the present invention;

[0032] Figure 4 Another perspective view of the structure of the denture preparation device provided by an embodiment of the present invention;

[0033] Figure 5 A schematic longitudinal section diagram of the structure of a denture preparation device provided in an embodiment of the present invention;

[0034] Figure 6 A schematic diagram of the structure of an injection molding component provided in an embodiment of the present invention;

[0035] Figure 7 A schematic diagram of the connection between the trigger mechanism and the kinetic energy component structure provided by an embodiment of the present invention;

[0036] Figure 8-9 Another perspective view of the trigger mechanism structure provided by an embodiment of the present invention;

[0037] Fig.10 A schematic cross-sectional view of a conveying frame structure provided by an embodiment of the present invention;

[0038] Fig.11 A schematic diagram of the structure of a kinetic energy component provided by an embodiment of the present invention;

[0039] Fig.12 for Fig.10 The enlarged view of point A in the middle;

[0040] Fig.13 for Fig.10 The enlarged view of point B in the middle;

[0041] Fig.14for Fig.10 Enlarged view of point C in the middle.

[0042] Description of reference numerals:

[0043] 11. Artificial teeth; 12. Abutment teeth; 13. Labial and buccal resin; 14. Metal backing plate on the lingual and palatal side; 15. Occlusal support; 21. Preparation frame; 22. Rectangular conveyor belt; 23. Passive conveyor belt; 24. Conveying frame; 25. Mold frame; 31. Moving plate; 32. Baffle plate; 33. Connecting spring; 41. External frame; 42. Demolding rod; 43. Fixed frame; 44. Vertical rod; 45. Wave groove; 51. Wedge block; 52. Abutment spring; 53. Inclined long rod; 54. Limiting plate; 55. Pushing plate; 56. Limiting spring; 57. Unlocking rod; 58. Rectangular shaped block; 59, inclined groove; 61, support plate; 62, unlocking block; 71, mounting block; 72, sliding rod; 73, long annular frame; 74, side plate; 75, crank; 76, slider; 77, first raised block; 78, second raised block; 81, mounting table; 82, electric telescopic rod; 83, injection molding device; 84, injection molding plate; 85, passive plate; 86, extrusion plate; 87, L-shaped plate; 88, cross frame; 91, active rotating rod; 92, residual gear; 93, cam; 94, full gear; 95, abutment plate; 101, rotating guide plate; 102, cleaning frame. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0045] See also Figure 1-14 The embodiment provides a fracture-resistant invisible partial denture, comprising an artificial tooth 11, a lingual-palatal metal bridge frame and a labial-buccal resin 13. The lingual-palatal metal bridge frame is composed of a lingual-palatal metal back plate 14 and a closure support 15. The lingual-palatal metal bridge frame is computer-aided designed according to the data requirements provided by the doctor and is manufactured through 3D printing technology. Different metal materials can be processed, including cobalt-chromium alloy, titanium alloy, and nickel-chromium alloy. The lingual-palatal metal back plate 14 is tightly attached to the lingual-palatal side of the abutment 12 and has a thickness of about 0.5 mm. It plays a balancing and stabilizing role in the absence of an obvious foreign body sensation. The closure support 15 is located on the occlusal surface of the abutment 12 and resists the occlusal pressure in the functional state to prevent the denture from sinking. The lingual-palatal metal back plate 14 is connected to the closure support 15 as a whole to prevent the denture from being deformed by force and maintain the stability of the denture. The lingual-palatal metal part is not easily found in the mouth, which can improve the aesthetics of the partial denture when worn.

[0046] In an embodiment further provided by the present invention, the labial and buccal resin 13 is fixed to the undercut of the abutment 12 to fix the denture, prevent the denture from dislocating, and also have a balancing and stabilizing effect.

[0047] A preparation device for anti-fracture invisible partial dentures, which is used to prepare the above-mentioned dentures, comprises a preparation frame 21 and a rectangular conveyor belt 22 arranged in the preparation frame 21. The preparation frame 21 can be filled with a certain amount of coolant for cooling the mold after injection molding in the mold frame 25. The rectangular conveyor belt 22 is a plate conveyor belt. The specific shape of the rectangular conveyor belt 22 can be referred to in the appendix of the specification. Figure 3 A passive conveyor belt 23 is also provided on one side of the preparation frame 21; a plurality of conveyor frames 24 are equidistantly provided on the rectangular conveyor belt 22, and a mold frame 25 is installed in the conveyor frame 24 through a clamping assembly. The rectangular conveyor belt 22 drives the conveyor frame 24 to move, and the mold frame 25 arranged inside it can be driven to move synchronously; it also includes a demoulding assembly, a trigger mechanism and a kinetic energy assembly, which are arranged on the preparation frame 21; when the rectangular conveyor belt 22 stops working intermittently, the trigger mechanism triggers the demoulding assembly to demould one of the mold frames 25, and releases the limitation of the clamping assembly in another conveyor frame 24 through the unlocking assembly, so that the mold frame 25 falls onto the passive conveyor belt 23, and then the passive conveyor belt 23 is driven by the kinetic energy assembly to transport the mold frame 25. The shapes of partial invisible dentures are different, so the mold needs to be continuously adjusted. The frame 25 can be replaced, and the device can effectively improve the efficiency of replacing the mold frame 25 and improve the preparation efficiency of the partial denture; the trigger mechanism includes a moving plate 31 slidably connected to the preparation frame 21, and a baffle 32 is fixedly connected to one side of the moving plate 31, and a connecting spring 33 is arranged between the baffle 32 and the preparation frame 21, and the moving plate 31 slides horizontally on the outside of the preparation frame 21, and the elastic force of the connecting spring 33 drives the baffle 32 away from the preparation frame 21; the moving plate 31 is connected to the demolding assembly through the first driving unit, and the movement of the moving plate 31 provides kinetic energy for the demolding assembly through the first driving unit, and the baffle 32 is connected to the clamping assembly through the second driving unit, and the baffle 32 moves with the moving plate 31 and cooperates with the second driving unit to drive the clamping assembly to unlock, so as to facilitate the separation of the mold frame 25 after injection molding from the conveying frame 24.

[0048] In an embodiment further provided by the present invention, the demoulding assembly includes an external frame 41 fixedly connected to the preparation frame 21, and a plurality of demoulding rods 42 are slidably connected to the external frame 41, and one end of the plurality of demoulding rods 42 is fixedly connected to the same fixed frame 43; the first driving unit includes a vertical rod 44 fixedly connected to the fixed frame 43, and a wave groove 45 is provided on the movable plate 31, and the vertical rod 44 is slidably connected to the wave groove 45. The specific stroke of the wave groove 45 can be referred to in the appendix of the specification. Fig. 9The demoulding rod 42 is driven to move back and forth by the cooperation between the vertical rod 44 and the wave groove 45 to knock and demould the material in the mold frame 25.

[0049] Furthermore, the clamping assembly includes a wedge block 51 slidably connected to the conveying frame 24, an abutment spring 52 is arranged between the wedge block 51 and the conveying frame 24, and the side of the wedge block 51 away from the inside of the conveying frame 24 is arranged in an inclined shape; the unlocking assembly includes an inclined long rod 53 slidably connected to the conveying frame 24, a limit plate 54 and a push plate 55 are fixedly connected to the inclined long rod 53, a limit spring 56 is arranged between the limit plate 54 and the preparation frame 21, an unlocking rod 57 is fixedly connected to the limit plate 54, and a rectangular spring 58 is fixedly connected to the wedge block 51 through a connecting rod. Block 58, a bevel groove 59 is provided on the rectangular block 58, and the movement stroke of the unlocking rod 57 contacts the bevel groove 59. The interior of the conveying frame 24 is provided with grooves for the movement of the wedge block 51, the bevel long rod 53, the limit plate 54, the push plate 55, the unlocking rod 57 and the rectangular block 58. The end of the unlocking rod 57 close to the rectangular block 58 is set to be inclined. When the unlocking rod 57 enters the interior of the rectangular block 58, it will drive the rectangular block 58 to move. Through the cooperation of the connecting rod, the wedge block 51 blocking one side of the mold frame 25 can be driven into the interior of the conveying frame 24.

[0050] Furthermore, the second driving unit includes a support plate 61 fixedly connected to the baffle 32, and an unlocking block 62 is fixedly connected to the support plate 61. The unlocking block 62 contacts the inclined long rod 53 during the movement. The specific shape of the unlocking block 62 can be found in the appendix of the specification. Figure 7 .

[0051] In an embodiment further provided by the present invention, the kinetic energy component includes a mounting block 71 fixedly connected to the preparation frame 21, a slide bar 72 is slidably connected to the mounting block 71, and both ends of the slide bar 72 are respectively fixedly connected to an annular long frame 73 and a side plate 74, an auxiliary spring is arranged between the side plate 74 and the mounting block 71, and the elastic force of the auxiliary spring drives the side plate 74 away from the mounting block 71; a crank 75 is fixedly connected to the transmission shaft of the passive conveyor belt 23, and a slider 76 is arranged on the crank 75, and the slider 76 is slidably connected to the annular long frame 73. When When the annular long frame 73 moves back and forth, the slider 76 can drive the crank 75 to rotate, and the rotation of the crank 75 can drive the passive conveyor belt 23 to rotate, so as to transport the mold frame 25 dropped on the passive conveyor belt 23. A first protrusion block 77 is fixedly connected to the side plate 74, and a plurality of second protrusion blocks 78 distributed in a linear array are fixedly connected to the support plate 61. The plurality of second protrusion blocks 78 contact the first protrusion block 77 in turn during the movement. The arrangement of the first protrusion block 77 and the second protrusion block 78 can be found in the appendix of the specification. Figure 7 .

[0052] In the embodiment provided by the present invention, an injection molding assembly is arranged on the preparation frame 21, and the injection molding assembly includes a mounting table 81 fixedly connected to the preparation frame 21, and an injector 83 is fixedly connected to the mounting table 81 through an electric telescopic rod 82, and an injection molding plate 84 is arranged on the injector 83; a passive plate 85 and an extrusion plate 86 are slidably connected to the mounting table 81, and the passive plate 85 is connected to the injection molding plate 84 through an L-shaped plate 87, and a cross frame 88 is arranged between the passive plate 85 and the extrusion plate 86. When the electric telescopic rod 82 pushes the injector 83 to drive the injection molding plate 84 to move, the passive plate 85 will be driven to move synchronously through the L-shaped plate 87, and the passive plate 85 can synchronously drive the passive plate 85 to move synchronously in the opposite direction through the cross frame 88. During injection molding, the injection molding plate 84 is docked with the injection molding hole on the mold frame 25, and the extrusion plate 86 is extruded on the other side of the mold frame 25. Its specific shape can be found in the attached figure of the specification. Figure 6 .

[0053] In the solution further provided by the present invention, a driving assembly is also provided on the preparation frame 21, and the driving assembly includes an active rotating rod 91 arranged on the preparation frame 21, and a residual gear 92 and a cam 93 are arranged on the active rotating rod 91; a full gear 94 is arranged on the transmission shaft of the rectangular conveyor belt 22, and the residual gear 92 meshes with the full gear 94 during the movement stroke, and an abutment plate 95 is fixedly connected to one side of the movable plate 31, and the cam 93 contacts the abutment plate 95. The active rotating rod 91 is driven by an external driving source, and the active rotating rod 91 is rotated to make the residual gear 92 contact with the full gear 94, and drive the full gear 94 to rotate and move for a period of time, wherein the number of rotations of the full gear 94 is greater than the injection molding time.

[0054] In the solution further provided by the present invention, a rotating guide plate 101 is also provided on the preparation frame 21, and the rotating guide plate 101 is arranged above the passive conveyor belt 23. When the mold frame 25 in the conveying frame 24 is demolded, the rotating guide plate 101 is pushed to rotate to guide it to the passive conveyor belt 23 for transportation. The preparation frame 21 is also connected to a cleaning frame 102, and the cleaning frame 102 is arranged at a position corresponding to the demolding component. The mold in the mold frame 25 can be pushed into the cleaning frame through the demolding component for further demolding.

[0055] Working principle: When working, the mold frame 25 for injection molding is installed on the conveying frame 24, and the rectangular conveyor belt 22 works to deliver the conveying frame 24 and the mold frame 25 to the injection molding assembly. At this time, the rectangular conveyor belt 22 stops conveying, and the electric telescopic rod 82 on the mounting table 81 works to push the injector 83 to move until the injection plate 84 connected to one end of the injector 83 corresponds to the mold hole on the mold frame 25, and when the injection plate 84 moves, it will drive the passive plate 85 on the other side of the preparation frame 21 to move synchronously through the L-shaped plate 87. The passive plate 85 moves and pulls the cross frame 88 to rotate, so that the extrusion plate 86 on the other side of the cross frame 88 moves synchronously and fits on the other side of the mold frame 25 for extrusion. After the injection molding is completed, the electric telescopic rod 82 moves in the opposite direction and resets, and drives the injection plate 84 and the extrusion plate 86 to synchronously move away from the mold frame 25, and the rectangular conveyor belt 22 rotates again to convey the mold frame 25 after the injection molding is completed to the coolant so that the resin inside it can be cooled and formed. After the mold frame 25 cools for a certain period of time, the rectangular conveyor belt 22 works again to move the cooled mold frame 25 to the demolding component side, and the contact plate will move under the action of the cam 93, and drive the moving plate 31 to move synchronously, and the movement of the moving plate 31 will drive the demolding rod 42 to move back and forth under the action of the wave groove 45, the vertical rod 44 and the fixed frame 43 to knock and demold the mold in the mold frame 25;

[0056] When the moving plate 31 moves, it will also drive the baffle plate 32 to move synchronously. The movement of the baffle plate 32 drives the unlocking block 62 to move through the support plate 61, so that the unlocking block 62 triggers the movement of the inclined long rod 53 in the previous conveying frame 24. The inclined long rod 53 moves toward the inside of the conveying frame 24 and drives the unlocking rod 57 to enter the inclined groove 59 inside the rectangular block 58 through the limit plate 54, so that the rectangular block 58 drives the wedge block 51 to move and enter the inside of the conveying frame 24 through the connecting rod. At this time, the inclined long rod 53 continues to move through the pushing plate 55 connected thereto to push the mold frame 25 to move from the conveying frame 24. After the mold frame 25 moves, due to the weight The force will squeeze the rotating guide plate 101, so that the rotating guide plate 101 rotates and tilts to transport the mold frame 25 to the passive conveyor belt 23. At the same time, the second protrusion block 78 set on the support plate 61 will contact the first protrusion block 77 on the side plate 74, and push the first protrusion block 77 and the side plate 74 to move to the side away from the baffle 32. The movement of the side plate 74 can drive the annular long frame 73 to move synchronously through the slide bar 72. The movement of the annular long frame 73 cooperates with the slider 76 to drive the crank 75 to rotate. The rotation of the crank 75 can drive the passive conveyor belt 23 to work, so that the mold frame 25 that falls on the passive conveyor belt 23 can be transported.

[0057] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A preparation device for anti-fracture invisible partial denture, which is used to prepare anti-fracture invisible partial denture, the partial denture comprises an artificial tooth (11), the artificial tooth (11) is connected to the abutment teeth (12) on both sides through a lingual-palatal metal bridge frame and a labial-cheek resin (13), the lingual-palatal metal bridge frame is composed of a lingual-palatal metal back plate (14) and a support (15), the lingual-palatal metal back plate (14) is in close contact with the lingual-palatal side of the abutment tooth (12), the support (15) is located on the occlusal surface of the abutment tooth (12), and the labial-cheek resin (13) is fixed to the undercut of the abutment tooth (12), characterized in that: It comprises a preparation frame (21) and a rectangular conveyor belt (22) arranged in the preparation frame (21), and a passive conveyor belt (23) is also arranged on one side of the preparation frame (21); A plurality of conveying frames (24) are equidistantly arranged on the rectangular conveying belt (22), and a mold frame (25) is installed in the conveying frame (24) via a clamping assembly; It also includes a demoulding component, a trigger mechanism and a kinetic energy component, which are arranged on the preparation frame (21); When the rectangular conveyor belt (22) stops working intermittently, the trigger mechanism triggers the demoulding component to work to demould one of the mold frames (25), and releases the restriction of the clamping component in the other conveying frame (24) through the unlocking component, so that the mold frame (25) falls onto the passive conveyor belt (23), and then the kinetic energy component drives the passive conveyor belt (23) to work to convey the mold frame (25); The trigger mechanism comprises a moving plate (31) slidably connected to the preparation frame (21), a baffle (32) is fixedly connected to one side of the moving plate (31), and a connecting spring (33) is provided between the baffle (32) and the preparation frame (21); The movable plate (31) is connected to the demoulding assembly via a first driving unit, and the baffle plate (32) is connected to the clamping assembly via a second driving unit; The demoulding assembly comprises an external frame (41) fixedly connected to the preparation frame (21), a plurality of demoulding rods (42) are slidably connected to the external frame (41), and one end of the plurality of demoulding rods (42) is fixedly connected to the same fixing frame (43); The first driving unit comprises a vertical rod (44) fixedly connected to a fixed frame (43); a wave groove (45) is provided on the movable plate (31); and the vertical rod (44) is slidably connected in the wave groove (45); The clamping assembly comprises a wedge block (51) slidably connected to the conveying frame (24), and an abutment spring (52) is provided between the wedge block (51) and the conveying frame (24); The unlocking assembly comprises an inclined long rod (53) slidably connected in the conveying frame (24), a limit plate (54) and a push plate (55) are fixedly connected to the inclined long rod (53), a limit spring (56) is arranged between the limit plate (54) and the conveying frame (24), an unlocking rod (57) is fixedly connected to the limit plate (54), a rectangular block (58) is fixedly connected to the wedge block (51) via a connecting rod, an inclined groove (59) is provided on the rectangular block (58), and the moving stroke of the unlocking rod (57) contacts the inclined groove (59); The second driving unit comprises a support plate (61) fixedly connected to the baffle plate (32), an unlocking block (62) fixedly connected to the support plate (61), and the unlocking block (62) contacts the inclined long rod (53) during the movement stroke; The kinetic energy assembly comprises a mounting block (71) fixedly connected to the preparation frame (21), a slide rod (72) being slidably connected to the mounting block (71), two ends of the slide rod (72) being respectively fixedly connected to an annular long frame (73) and a side plate (74), and an auxiliary spring being arranged between the side plate (74) and the mounting block (71); A crank (75) is fixedly connected to the transmission shaft of the passive conveyor belt (23), a slider (76) is provided on the crank (75), and the slider (76) is slidably connected in the annular long frame (73), a first protrusion block (77) is fixedly connected to the side plate (74), and a plurality of second protrusion blocks (78) distributed in a linear array are fixedly connected to the support plate (61), and the plurality of second protrusion blocks (78) contact the first protrusion block (77) in sequence during the movement.

2. The device for preparing a fracture-resistant invisible partial denture according to claim 1, characterized in that: An injection molding assembly is arranged on the preparation frame (21), and the injection molding assembly comprises a mounting platform (81) fixedly connected to the preparation frame (21), an injection molding machine (83) is fixedly connected to the mounting platform (81) via an electric telescopic rod (82), and an injection molding plate (84) is arranged on the injection molding machine (83); A passive plate (85) and an extrusion plate (86) are slidably connected to the mounting platform (81); the passive plate (85) is connected to the injection molding plate (84) via an L-shaped plate (87); and a cross frame (88) is provided between the passive plate (85) and the extrusion plate (86).

3. The device for preparing a fracture-resistant invisible partial denture according to claim 1, characterized in that: The preparation frame (21) is also provided with a driving assembly, the driving assembly comprising an active rotating rod (91) arranged on the preparation frame (21), and the active rotating rod (91) is provided with a residual gear (92) and a cam (93); A full gear (94) is arranged on the transmission shaft of the rectangular conveyor belt (22), and the residual gear (92) meshes with the full gear (94) during the movement stroke. An abutment plate (95) is fixedly connected to one side of the movable plate (31), and the cam (93) contacts the abutment plate (95).

4. The device for preparing a fracture-resistant invisible partial denture according to claim 1, characterized in that: The preparation frame (21) is also provided with a rotating guide plate (101), and the preparation frame (21) is also connected to a cleaning frame (102).

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