Oral temporal-mandibular joint retainer for periodontal examination

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to an oral temporal-mandibular joint retainer for periodontal examinations, which comprises a mounting seat, the mounting seat is fixed on the ground through bolts, the left side wall of the mounting seat is connected with a controller, the front side wall of the mounting seat is connected with a support plate, and the support plate is connected with the controller. The upper side wall of the supporting plate is connected with a seat plate through a lifting mechanism, the front side wall of the mounting seat is connected with a headrest, and a bandage is arranged outside the headrest. When a doctor examines the periodontium of a patient, the temporomandibular joint of the patient can be fixed in a manner of adsorbing epidermis by negative pressure, so that the stability of the temporomandibular joint of the patient is ensured, and the doctor can conveniently observe teeth and operate instruments.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and in particular relates to an oral temporomandibular joint retainer for periodontal examination. Background Technology

[0002] A full-mouth periodontal examination requires sequential exposure of the buccal and lingual surfaces and mesial and distal surfaces of each tooth. Frequent mandibular movement may lead to changes in the position of the corner of the mouth and deformation of the gingival tissue due to instability, affecting the doctor's observation of signs such as periodontal inflammation (e.g., redness, swelling, bleeding) and gingival recession. Therefore, some doctors use retainers to fix the temporomandibular joint during periodontal examinations, such as the dislocated temporomandibular joint repositioning device proposed in patent publication number CN215131068U.

[0003] Existing temporomandibular joint fixation devices first fix the patient's head during the fixation procedure, and then limit the mandible to prevent it from moving too far downward and causing damage. At the same time, in order to prevent the patient from involuntarily closing their mouth slightly during the examination, a support component needs to be placed inside the mouth. This component will interfere with the doctor's observation of the teeth and instrument operation.

[0004] Therefore, a temporomandibular joint retainer for periodontal examination is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing an oral temporomandibular joint retainer for periodontal examination.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an oral temporomandibular joint retainer for periodontal examination, comprising a mounting base, the mounting base being fixed to the ground by bolts, a controller being connected to the left side wall of the mounting base, a support plate being connected to the front side wall of the mounting base, a seat plate being connected to the upper side wall of the support plate via a lifting mechanism, a headrest being connected to the front side wall of the mounting base, and a strap being provided on the outside of the headrest, further comprising:

[0007] The top plate is fixedly connected to the front side wall of the mounting base, and the lower side wall of the top plate is connected to the fixing component through the adjustment component for fixing the patient's temporomandibular joint;

[0008] A clamping component, disposed on the side wall of the fixing component, is used to clamp the patient's beard.

[0009] Preferably, the adjusting assembly includes a sliding seat fixedly connected to the lower side wall of the top plate. A sliding sleeve is slidably fitted on the lower side of the sliding seat. The sliding sleeve is fixed to the sliding seat by a positioning bolt. A moving plate is fixedly connected to the lower side wall of the sliding sleeve. A working frame is fixedly connected to the right side wall of the moving plate. A threaded pin is rotatably connected to the inner wall of the working frame. A threaded ring is threadedly connected to the outer wall of the threaded pin. A lifting rod is fixedly connected to the left side wall of the threaded ring. A lifting port matching the lifting rod is opened on the side wall of the moving plate. The left end of the lifting rod passes through the lifting port and is fixedly connected to a fixed seat. An adjusting seat is rotatably connected to the left side wall of the fixed seat. An adjusting hole is opened on the side wall of the adjusting seat, and an adjusting pin is inserted into the adjusting hole. A pull plate is fixedly connected to the left end of the adjusting pin. The same spring is fixedly connected between the pull plate and the adjusting seat. Two adjusting ports matching the adjusting pin are opened on the side wall of the fixed seat. An adjusting rod is fixedly connected to the left side wall of the adjusting seat. The left end of the adjusting rod is connected to the fixing assembly.

[0010] Preferably, the fixing assembly includes a water tank fixedly connected to the left end of the adjusting rod. Placement boxes are fixedly connected to both the upper and lower sides of the water tank. The side wall of the placement box away from the water tank is an arc-shaped surface. Multiple piston cylinders are evenly distributed on the arc-shaped surface of the placement box. A plug ring is fixedly connected to the inner wall of each piston cylinder. A metal tube is movably inserted into the plug ring. One end of the metal tube inside the piston cylinder is connected to a piston plate. The upper end of the upper metal tube extends out of the piston cylinder and is fixedly connected to a suction cup. The lower end of the lower metal tube extends out of the piston cylinder and is fixedly connected to a rubber seat. The inner wall of the placement box... A first arc-shaped pipe is fixedly connected, and the first arc-shaped pipe and multiple piston cylinders are fixedly connected by the same short pipe. A pump is connected to the left side wall of the water tank, and a delivery pipe is connected to the outlet end of the pump. The upper and lower ends of the delivery pipe are respectively connected to the first arc-shaped pipes on the upper and lower sides. Two first control valves are provided in the delivery pipe. A return water pipe is connected to the end of the first arc-shaped pipe away from the delivery pipe. A second control valve is provided in the return water pipe. The end of the return water pipe away from the first arc-shaped pipe is connected to the water tank. A hydraulic sensor is provided at the outlet end of the pump, and a negative pressure component is provided in the upper placement box.

[0011] Preferably, the negative pressure assembly includes a second arc-shaped tube fixedly connected to the upper placement box. The side wall of the second arc-shaped tube is fixedly connected to multiple bent tubes. The end of each bent tube away from the second arc-shaped tube is fixedly inserted into a corresponding piston cylinder. The end of each bent tube inside the piston cylinder is connected to a serpentine flexible tube. The upper end of the serpentine flexible tube passes through the piston plate and is connected to a metal tube. A negative pressure pump is connected to the inner wall of the upper placement box. The suction end of the negative pressure pump is connected to the second arc-shaped tube. The suction end of the negative pressure pump is equipped with a first magnetic control valve.

[0012] Preferably, an arc-shaped sealing plate is fixedly connected to the inner wall of the placement box, the piston cylinder passes through the arc-shaped sealing plate, the arc-shaped sealing plate and the arc-shaped surface of the placement box form a heating chamber, the heating chamber and the delivery pipe are fixedly connected by the same hot water pipe, the hot water pipe is provided with a first regulating valve, the heating chamber and the return water pipe are fixedly connected by the same circulation pipe, the circulation pipe is provided with a second regulating valve.

[0013] Preferably, the clamping assembly includes an arc-shaped plate fixedly connected to the rear side wall of the lower placement box, a threaded cylinder fixedly inserted into the side wall of the arc-shaped plate, a threaded rod threadedly sleeved inside the threaded cylinder, and a pressure plate rotatably connected to one end of the threaded rod passing through the threaded cylinder.

[0014] Preferably, the side wall of the pressure plate is fixedly connected with a guide pin, and the side wall of the arc plate is provided with a guide hole that matches the guide pin.

[0015] Preferably, the pipe wall of the suction end of the negative pressure pump is connected to a horizontal pipe, the horizontal pipe is connected to the outside, and a second magnetic control valve is provided inside the horizontal pipe.

[0016] Compared to existing technologies, the advantages of an oral temporomandibular joint retainer for periodontal examination are:

[0017] 1. With the fixed component and negative pressure component, when the doctor examines the patient's periodontal tissue, he can use negative pressure to absorb the epidermis to fix the patient's temporomandibular joint. This not only ensures the stability of the patient's temporomandibular joint, but also facilitates the doctor's observation of the teeth and instrument operation.

[0018] 2. With the clamping components, when the patient's beard is thick and long, the temporomandibular joint can be fixed by clamping a large amount of beard, thus avoiding the problem of beard affecting the fixation of the patient's temporomandibular joint.

[0019] 3. Through the heating chamber, hot water pipe, first regulating valve, circulation pipe and second regulating valve, the patient's mandible can be heated during the periodontal examination, which can promote relaxation of the muscles in the mandibular area, reduce examination resistance and relieve muscle soreness after the examination. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an oral temporomandibular joint retainer for periodontal examination provided by the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of an oral temporomandibular joint retainer for periodontal examination provided by the present invention;

[0022] Figure 3This is a schematic diagram of the surface structure of the water tank in an oral temporomandibular joint retainer for periodontal examination provided by the present invention;

[0023] Figure 4 This is a schematic diagram of the adjustment component in an oral temporomandibular joint retainer for periodontal examination provided by the present invention;

[0024] Figure 5 yes Figure 4 An enlarged schematic diagram of part A in the middle;

[0025] Figure 6 This is a schematic diagram of the internal structure of the placement box in an oral temporomandibular joint retainer for periodontal examination provided by the present invention;

[0026] Figure 7 This is a schematic diagram of the internal structure of the piston cylinder in an oral temporomandibular joint retainer for periodontal examination provided by the present invention;

[0027] Figure 8 This is a schematic diagram of the clamping component in an oral temporomandibular joint retainer for periodontal examination provided by the present invention.

[0028] In the diagram: 1 Mounting base, 2 Controller, 3 Support plate, 4 Seat plate, 5 Headrest, 6 Strap, 7 Top plate, 8 Adjustment assembly, 81 Sliding seat, 82 Sliding sleeve, 9 Moving plate, 10 Working frame, 11 Threaded pin, 12 Threaded ring, 13 Lifting rod, 14 Fixed seat, 15 Adjusting seat, 16 Adjusting hole, 17 Adjusting pin, 18 Pull plate, 19 Adjusting port, 20 Adjusting rod, 21 Fixed assembly, 211 Water tank, 212 Placement box, 22 Piston cylinder, 23 Insert ring, 24 Metal tube, 25 Suction cup, 26 Rubber seat, 27 First arc-shaped tube, 2 8. Short pipe, 29. Pump, 30. Delivery pipe, 31. First control valve, 32. Return water pipe, 33. Second control valve, 34. Negative pressure assembly, 341. Second arc-shaped pipe, 342. Bend, 35. Woven hose, 36. Negative pressure pump, 37. First magnetic control valve, 38. Arc-shaped sealing plate, 39. Heating chamber, 40. Hot water pipe, 41. First regulating valve, 42. Circulation pipe, 43. Second regulating valve, 44. Clamping assembly, 441. Arc-shaped plate, 442. Threaded cylinder, 45. Threaded rod, 46. Pressure plate, 47. Guide pin, 48. Horizontal pipe, 49. Second magnetic control valve, 50. Piston plate. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] like Figures 1-8As shown, an oral temporomandibular joint retainer for periodontal examination includes a mounting base 1, which is fixed to the ground by bolts. A controller 2 is connected to the left side wall of the mounting base 1, a support plate 3 is connected to the front side wall of the mounting base 1, a seat plate 4 is connected to the upper side wall of the support plate 3 via a lifting mechanism, a headrest 5 is connected to the front side wall of the mounting base 1, and a strap 6 is provided on the outside of the headrest 5. The device also includes:

[0031] The top plate 7 is fixedly connected to the front side wall of the mounting base 1. The lower side wall of the top plate 7 is connected to the fixing component 21 via the adjusting component 8 for fixing the patient's temporomandibular joint. The adjusting component 8 includes a sliding seat 81 fixedly connected to the lower side wall of the top plate 7. A sliding sleeve 82 is slidably sleeved on the lower side of the sliding seat 81. The sliding sleeve 82 is fixed to the sliding seat 81 by a positioning bolt. A moving plate 9 is fixedly connected to the lower side wall of the sliding sleeve 82. A working frame 10 is fixedly connected to the right side wall of the moving plate 9. A threaded pin 11 is rotatably connected to the inner wall of the working frame 10. A threaded ring 12 is threadedly connected to the outer wall of the threaded pin 11. A lifting rod 13 is fixedly connected to the left side wall of the threaded ring 12. The side wall of the moving plate 9... A lifting port matching the lifting rod 13 is provided. The left end of the lifting rod 13 passes through the lifting port and is fixedly connected to the fixed seat 14. The left side wall of the fixed seat 14 is rotatably connected to the adjusting seat 15. The side wall of the adjusting seat 15 is provided with an adjusting hole 16, and an adjusting pin 17 is inserted into the adjusting hole 16. The left end of the adjusting pin 17 is fixedly connected to the pull plate 18. The same spring is fixedly connected between the pull plate 18 and the adjusting seat 15. The side wall of the fixed seat 14 is provided with two adjusting ports 19 matching the adjusting pin 17. The left side wall of the adjusting seat 15 is fixedly connected to the adjusting rod 20. The left end of the adjusting rod 20 is connected to the fixed component 21, which facilitates the adjustment of the position of the fixed component 21.

[0032] The clamping assembly 44 is disposed on the side wall of the fixing assembly 21 and is used to clamp the patient's beard. The clamping assembly 44 includes an arc-shaped plate 441 fixedly connected to the rear side wall of the lower placement box 212. A threaded cylinder 442 is fixedly inserted into the side wall of the arc-shaped plate 441. A threaded rod 45 is threadedly sleeved inside the threaded cylinder 442. A pressure plate 46 is rotatably connected to one end of the threaded rod 45 that passes through the threaded cylinder 442. A guide pin 47 is fixedly connected to the side wall of the pressure plate 46. A guide hole matching the guide pin 47 is opened on the side wall of the arc-shaped plate 441, which can clamp the patient's beard.

[0033] The fixing assembly 21 includes a water tank 211 fixedly connected to the left end of the adjusting rod 20. The water tank 211 has a water heating function. Placement boxes 212 are fixedly connected to both the upper and lower sides of the water tank 211. The side wall of the placement box 212 away from the water tank 211 is an arc-shaped surface. Multiple piston cylinders 22 are evenly distributed on the arc-shaped surface of the placement box 212. A plug ring 23 is fixedly connected to the inner wall of each piston cylinder 22. A metal tube 24 is movably inserted into the plug ring 23. One end of the metal tube 24 inside the piston cylinder 22 is connected to a piston plate 50. The upper end of the upper metal tube 24 extends out of the piston cylinder 22 and is fixedly connected to a suction cup 25. The lower end of the lower metal tube 24 extends out of the piston cylinder 22 and is fixedly connected to a rubber seat 26. The inner wall of the placement box 212 is fixedly connected to the piston cylinder 22. A first arc-shaped tube 27 is fixedly connected, and the first arc-shaped tube 27 and multiple piston cylinders 22 are fixedly connected by the same short pipe 28. A pump 29 is connected to the left side wall of the water tank 211. The outlet end of the pump 29 is connected to a delivery pipe 30. The upper and lower ends of the delivery pipe 30 are respectively connected to the first arc-shaped tubes 27 on the upper and lower sides. Two first control valves 31 are provided in the delivery pipe 30. The end of the first arc-shaped tube 27 away from the delivery pipe 30 is connected to a return water pipe 32. A second control valve 33 is provided in the return water pipe 32. The end of the return water pipe 32 away from the first arc-shaped tube 27 is connected to the water tank 211. A hydraulic sensor is provided at the outlet end of the pump 29. A negative pressure component 34 is provided in the upper placement box 212, which can limit the position according to the shape of the patient's mandible.

[0034] The negative pressure assembly 34 includes a second arc-shaped tube 341 fixedly connected to the upper placement box 212. The side wall of the second arc-shaped tube 341 is fixedly connected to multiple bent tubes 342. The end of the bent tube 342 away from the second arc-shaped tube 341 is fixedly inserted into the corresponding piston cylinder 22. The end of the bent tube 342 located in the piston cylinder 22 is connected to a serpentine flexible tube 35. The upper end of the serpentine flexible tube 35 passes through the piston plate 50 and is connected to the metal tube 24. The inner wall of the upper placement box 212 is connected to a negative pressure pump 36. The suction end of the negative pressure pump 36 is connected to the second arc-shaped tube 341. The suction end of the negative pressure pump 36 is provided with a first magnetic control valve 37. The tube wall of the suction end of the negative pressure pump 36 is connected to a horizontal tube 48. The horizontal tube 48 is connected to the outside. The horizontal tube 48 is provided with a second magnetic control valve 49, which can adsorb and fix the patient's jaw.

[0035] An arc-shaped sealing plate 38 is fixedly connected to the inner wall of the placement box 212. The piston cylinder 22 passes through the arc-shaped sealing plate 38. The arc-shaped sealing plate 38 and the arc-shaped surface of the placement box 212 form a heating chamber 39. The heating chamber 39 and the delivery pipe 30 are fixedly connected by the same hot water pipe 40. The hot water pipe 40 is equipped with a first regulating valve 41. The heating chamber 39 and the return water pipe 32 are fixedly connected by the same circulation pipe 42. The circulation pipe 42 is equipped with a second regulating valve 43, which can heat the patient's jaw at a temperature of 25 degrees Celsius.

[0036] The operating principle of this invention is explained as follows: The doctor can adjust the height of the seat 4 according to the patient's height using a lifting mechanism (the lifting mechanism includes a lifting cylinder, a lifting rod 13, and a locking pin; the lifting cylinder is connected to the upper side wall of the support plate 3; the lifting rod 13 is inserted into the lifting cylinder; the upper end of the lifting rod 13 is connected to the seat 4; the locking pin is inserted into the lifting cylinder; and the rod wall of the lifting rod 13 has multiple locking holes that match the locking pin). The patient sits on the adjusted seat 4, and the doctor slides the moving plate 9 towards the patient. The moving plate 9 moves the placement box 212 to below the patient's jaw. Then, the doctor uses the positioning bolt to fix the sliding sleeve 82. The doctor then uses the strap 6 to fix the patient's head in the headrest 5. The doctor then rotates the upper end of the threaded pin 11, which drives the threaded ring 12 to move through the threaded engagement of the threaded pin 11. The threaded ring 12 drives the water tank 211 and the placement box 212 to move upward through the lifting rod 13, the fixing seat 14, the adjusting seat 15, and the adjusting rod 20, so that the arc-shaped surface of the upper placement box 212 contacts the patient's open jaw.

[0037] Then, the operator sends an electrical signal to the controller 2 via the button on the front of the water tank 211. Simultaneously, the operator needs to manually stabilize the patient's jaw. Upon receiving the electrical signal, the controller 2 will activate the pump 29 and the first control valve 31 located above. The pump 29 will transport the liquid from the water tank 211 through the delivery pipe 30 to the first arc-shaped pipe 27, and then through the short pipe 28 to the multiple piston cylinders 22 above, subjecting the piston plate 50 to significant water pressure. Under this pressure, the piston plate 50 will... The metal tube 24 drives the suction cup 25 to contact the patient's chin skin (if the male patient has a small amount of stubble, it needs to be cleaned beforehand). Once the suction cup 25 contacts the patient's chin, it stops moving, and the pump 29 continuously delivers liquid into the piston cylinder 22, causing the liquid inside the piston cylinder 22 to continuously increase. When the controller 2 detects that the water pressure has reached the set threshold (100Pa) through the water pressure sensor set at the output end of the pump 29, the controller 2 will control the pump 29 to stop working and control the first control valve 31 to close. At this time, the... Some suction cups 25 are designed to fit snugly against the skin of the patient's lower jaw (suction cup 25 is a detachable structure). Then, the controller 2 activates the negative pressure pump 36. The negative pressure pump 36 extracts air from inside the suction cup 25 through the second arc-shaped tube 341, the bent tube 342, the serpentine flexible tube 35, and the metal tube 24, creating a negative pressure state. This allows the suction cup 25 to firmly adhere to the skin of the patient's lower jaw (the negative pressure between the suction cup 25 and the skin is 8 kPa), thus fixing the patient's temporomandibular joint and facilitating periodontal examination by the dentist. After the test is completed, the operator can send an electrical signal to the controller 2 via a button. The controller 2 controls the second magnetic valve 49 and the second control valve 33 to open simultaneously. External gas will then enter the suction cup 25 through the horizontal pipe 48, the second arc-shaped pipe 341, the bend pipe 342, the serpentine hose 35, and the metal pipe 24, so that the suction cup 25 returns to normal and can be detached from the patient's skin. Meanwhile, under the spring force, the piston plate 50 will press down the liquid, causing the liquid to flow back into the water tank 211 through the short pipe 28, the first arc-shaped pipe 27, and the return water pipe 32.

[0038] Once the patient's temporomandibular joint is fixed, the controller 2 will control the pump 29 to work and control the first regulating valve 41 and the second regulating valve 43 to open. The pump 29 will transport the heated liquid in the water tank 211 to the heating chamber 39 through the delivery pipe 30 and the hot water pipe 40, and then return it to the water tank 211 through the heating chamber 39, the circulation pipe 42 and the return water pipe 32 to heat the patient's mandible, promote relaxation of the mandibular muscles, reduce examination resistance, and relieve muscle soreness after the examination.

[0039] When the patient's beard is long and thick, before fixing the patient's temporomandibular joint, the doctor needs to pull the adjusting pin 17 and rotate the adjusting seat 15 180 degrees, so that the placement box 212, which was originally at the bottom, rotates to the top. Then, the above steps are repeated, using multiple metal tubes 24 to drive multiple rubber seats 26 to move, so that the multiple rubber seats 26 fit the patient's jaw. Then, the doctor needs to stuff the large amount of beard that the patient has placed in front of the water tank 211 into the arc plate 441. Then, the threaded rod 45 is rotated. Through the cooperation of the threaded rod 45 and the threaded cylinder 442, the threaded rod 45 will drive the pressure plate 46 to move (an elastic protective cover can be set between the arc plate 441 and the pressure plate 46, which is sleeved on the outside of the threaded rod 45 to prevent the beard from entering the gap between the threaded rod 45 and the threaded cylinder 442). The pressure plate 46 and the placement box 212 are used to squeeze and fix the patient's beard (fixing a large amount of beard will not cause the patient pain when moving slightly), thereby fixing the patient's temporomandibular joint.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An oral temporomandibular joint retainer for periodontal examination, comprising a mounting base (1) fixed to the ground by bolts, a controller (2) connected to the left side wall of the mounting base (1), a support plate (3) connected to the front side wall of the mounting base (1), a seat plate (4) connected to the upper side wall of the support plate (3) via a lifting mechanism, a headrest (5) connected to the front side wall of the mounting base (1), and a strap (6) provided on the outside of the headrest (5), characterized in that, Also includes: The top plate (7) is fixedly connected to the front side wall of the mounting base (1), and the lower side wall of the top plate (7) is connected to the fixing component (21) through the adjusting component (8) for fixing the patient's temporomandibular joint; A clamping component (44) is disposed on the side wall of the fixing component (21) for clamping the patient's beard.

2. The temporomandibular joint retainer for periodontal examination according to claim 1, characterized in that, The adjusting assembly (8) includes a sliding seat (81) fixedly connected to the lower side wall of the top plate (7). A sliding sleeve (82) is slidably fitted on the lower side of the sliding seat (81). The sliding sleeve (82) is fixed to the sliding seat (81) by a positioning bolt. A moving plate (9) is fixedly connected to the lower side wall of the sliding sleeve (82). A working frame (10) is fixedly connected to the right side wall of the moving plate (9). A threaded pin (11) is rotatably connected to the inner wall of the working frame (10). A threaded ring (12) is threadedly connected to the outer wall of the threaded pin (11). A lifting rod (13) is fixedly connected to the left side wall of the threaded ring (12). A lifting port matching the lifting rod (13) is opened on the side wall of the moving plate (9). The left end of the lifting rod (13) passes through the lifting port and is fixedly connected to the fixed seat (14). The left side wall of the fixed seat (14) is rotatably connected to the adjusting seat (15). The side wall of the adjusting seat (15) is provided with an adjusting hole (16), and an adjusting pin (17) is inserted into the adjusting hole (16). The left end of the adjusting pin (17) is fixedly connected to the pull plate (18). The same spring is fixedly connected between the pull plate (18) and the adjusting seat (15). The side wall of the fixed seat (14) is provided with two adjusting ports (19) that match the adjusting pin (17). The left side wall of the adjusting seat (15) is fixedly connected to the adjusting rod (20), and the left end of the adjusting rod (20) is connected to the fixing component (21).

3. The temporomandibular joint retainer for periodontal examination according to claim 2, characterized in that, The fixing assembly (21) includes a water tank (211) fixedly connected to the left end of the adjusting rod (20). Placement boxes (212) are fixedly connected to both the upper and lower sides of the water tank (211). The side wall of the placement box (212) away from the water tank (211) is an arc-shaped surface. Multiple piston cylinders (22) are evenly distributed on the arc-shaped surface of the placement box (212). A plug ring (23) is fixedly connected to the inner wall of the piston cylinder (22). A metal tube (24) is movably inserted into the plug ring (23). One end of the metal tube (24) inside the piston cylinder (22) is connected to a piston plate (50). The upper end of the upper metal tube (24) extends out of the piston cylinder (22) and is fixedly connected to a suction cup (25). The lower end of the lower metal tube (24) extends out of the piston cylinder (22) and is fixedly connected to a rubber seat (26). The inner wall of the placement box (212)... A first arc-shaped pipe (27) is fixedly connected, and the first arc-shaped pipe (27) and multiple piston cylinders (22) are fixedly connected by the same short pipe (28). A pump (29) is connected to the left side wall of the water tank (211). The outlet end of the pump (29) is connected to a delivery pipe (30). The upper and lower ends of the delivery pipe (30) are respectively connected to the first arc-shaped pipe (27) on the upper and lower sides. Two first control valves (31) are provided in the delivery pipe (30). The end of the first arc-shaped pipe (27) away from the delivery pipe (30) is connected to a return water pipe (32). A second control valve (33) is provided in the return water pipe (32). The end of the return water pipe (32) away from the first arc-shaped pipe (27) is connected to the water tank (211). A hydraulic sensor is provided at the outlet end of the pump (29). A negative pressure component (34) is provided in the upper placement box (212).

4. The temporomandibular joint retainer for periodontal examination according to claim 3, characterized in that, The negative pressure assembly (34) includes a second arc-shaped tube (341) fixedly connected to the upper placement box (212). The side wall of the second arc-shaped tube (341) is fixedly connected to multiple bent tubes (342). The end of the bent tube (342) away from the second arc-shaped tube (341) is fixedly inserted into the corresponding piston cylinder (22). The end of the bent tube (342) located in the piston cylinder (22) is connected to a serpentine hose (35). The upper end of the serpentine hose (35) passes through the piston plate (50) and is connected to the metal tube (24). The inner wall of the upper placement box (212) is connected to a negative pressure pump (36). The suction end of the negative pressure pump (36) is connected to the second arc-shaped tube (341). The suction end of the negative pressure pump (36) is provided with a first magnetic control valve (37).

5. The temporomandibular joint retainer for periodontal examination according to claim 3, characterized in that, An arc-shaped sealing plate (38) is fixedly connected to the inner wall of the placement box (212). The piston cylinder (22) passes through the arc-shaped sealing plate (38). The arc-shaped sealing plate (38) and the arc surface of the placement box (212) form a heating chamber (39). The heating chamber (39) and the delivery pipe (30) are fixedly connected by the same hot water pipe (40). The hot water pipe (40) is provided with a first regulating valve (41). The heating chamber (39) and the return water pipe (32) are fixedly connected by the same circulation pipe (42). The circulation pipe (42) is provided with a second regulating valve (43).

6. The temporomandibular joint retainer for periodontal examination according to claim 3, characterized in that, The clamping assembly (44) includes an arc-shaped plate (441) fixedly connected to the rear side wall of the lower placement box (212). A threaded cylinder (442) is fixedly inserted into the side wall of the arc-shaped plate (441). A threaded rod (45) is threadedly sleeved inside the threaded cylinder (442). A pressure plate (46) is rotatably connected to one end of the threaded rod (45) that passes through the threaded cylinder (442).

7. The temporomandibular joint retainer for periodontal examination according to claim 6, characterized in that, The side wall of the pressure plate (46) is fixedly connected with a guide pin (47), and the side wall of the arc plate (441) is provided with a guide hole that matches the guide pin (47).

8. A temporomandibular joint retainer for periodontal examination according to claim 4, characterized in that, The wall of the suction end of the negative pressure pump (36) is connected to a horizontal pipe (48), which is connected to the outside. A second magnetic control valve (49) is provided inside the horizontal pipe (48).

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