Instrument for stripping maxillary sinus mucosa

Abstract

The invention discloses an instrument for stripping maxillary sinus mucosa, and belongs to the technical field of medical instruments.The instrument comprises an operating handle, a first connecting rod and a second connecting rod are fixedly arranged at the two ends of the operating handle respectively, an upper movable shaft and a lower movable shaft are rotationally connected into the first connecting rod, and the upper movable shaft and the lower movable shaft both penetrate through the first connecting rod; 1 / 4 spherical stripping heads are fixedly arranged at the end parts of the upper movable shaft and the lower movable shaft, and the two 1 / 4 spherical stripping heads are in contact with each other but are not connected with each other; a lifting air bag is movably arranged in the second connecting rod, an air inflation pipe is connected to an opening of the lifting air bag and movably penetrates through the second connecting rod and the operating handle in the axial direction of the operating handle, and an air inflation connecting pipe is perpendicularly communicated with the air inflation pipe and penetrates through the operating handle in the radial direction. The instrument for stripping the maxillary sinus mucosa has the functions of a dome-shaped sinus spoon and a maxillary sinus lifting balloon in the prior art at the same time, rapid switching can be achieved, and lifting in a larger range is achieved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a set of instruments for peeling off the maxillary sinus mucosa. Background Technology

[0002] During dental implant surgery, to improve the clarity of the surgical field, it is usually necessary to elevate the maxillary sinus. This requires the use of appropriate instruments to dissect and elevate the maxillary sinus mucosa. First, a maxillary sinus lifting drill is used to drill a hole in the sinus floor bone. Then, a dome-shaped sinus spatula is used to open a window at the sinus floor to separate the sinus floor from the sinus membrane. Finally, a maxillary sinus lifting balloon is inserted to perform extensive dissection and elevation, creating a bone grafting area. After filling with bone graft material, the implant is placed.

[0003] During this surgical procedure, a dome-shaped sinus spatula and a maxillary sinus lifting balloon are used sequentially to dissect the maxillary sinus mucosa. If the functions of these two instruments can be integrated into one instrument, the efficiency of the surgery can be improved.

[0004] A device for dissecting the maxillary sinus mucosa, with publication number CN210354840U, features a handle divided into left and right sections. These sections are detachable, allowing for the assembly of the left and right sections, each equipped with different primary or secondary dissecting blades, depending on the specific situation. This significantly enhances the flexibility and practicality of the maxillary sinus mucosa dissector. A high-brightness white light emitted by an LED illuminates the dissected area, enabling the surgeon to observe the dissected area more directly, resulting in more precise dissection, reduced deviation, and lower surgical difficulty. However, this device still has the following drawbacks in practical use: 1. Traditional dissection instruments have fixed blades, which cannot adjust the lifting area during dissection according to different dissection needs. Therefore, multiple dissection instruments are needed to achieve a larger lifting range, which not only increases the inconvenience of operation, but also reduces surgical efficiency. 2. Although both ends of the instrument can be used for surgical operations, both ends are dissecting blades and can only function as dome-shaped sinus spatulas in existing technologies, and cannot function as maxillary sinus lifting balloons.

[0005] To address the aforementioned issues, there is an urgent need for innovative designs based on existing instruments for dissecting the maxillary sinus mucosa. Summary of the Invention

[0006] To address the aforementioned problems, this invention aims to provide a set of instruments for peeling off the maxillary sinus mucosa, which combines the functions of the dome-shaped sinus spatula and the maxillary sinus lifting balloon in the prior art, and can achieve rapid switching to achieve a wider range of lifting.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An instrument for peeling the maxillary sinus mucosa includes an operating handle. A first connecting rod and a second connecting rod are fixed to both ends of the operating handle. The instrument is characterized in that: an upper movable shaft and a lower movable shaft are rotatably connected within the first connecting rod, both of which penetrate the first connecting rod. A quarter-spherical peeling head is fixed to the end of each of the upper and lower movable shafts, and the two quarter-spherical peeling heads are in contact with each other but not connected. A lifting airbag is movably disposed within the second connecting rod. An inflation tube is connected to the opening of the lifting airbag. The inflation tube movably passes through the second connecting rod and the operating handle along the axial direction of the operating handle, and an inflation connecting tube is vertically connected to the inflation tube, which radially penetrates the operating handle.

[0008] Furthermore, a first mounting groove is provided at the end of the first connecting rod, and a connecting shaft is rotatably connected to the top and bottom of the first mounting groove. The upper movable shaft and the lower movable shaft are respectively fixed on the corresponding connecting shafts, and the upper movable shaft and the lower movable shaft rotate in opposite directions.

[0009] Furthermore, each of the connecting shafts is fitted with a first spring, and a fixing rod is fixed at one end of each of the two connecting shafts that are close to each other. The fixing rods are symmetrically distributed about the horizontal axis of the first connecting rod, and a ball bearing is embedded and rolled at the end of each of the two fixing rods away from the connecting shaft. The ends of the two fixing rods with the ball bearings are on the same horizontal line.

[0010] Furthermore, the operating handle has a movable cavity, the top of the movable cavity is movably connected to a movable cylinder, a second spring is fixed inside the movable cylinder, a movable rod is fixed at the bottom of the second spring, and the bottom of the movable rod passes through the movable cylinder; The bottom of the movable cavity is vertically connected to a movable through hole, which is parallel to the axis of the operating handle and communicates with the first mounting groove. A movable rod is slidably disposed in the movable through hole, and the movable rod is fixedly connected to the bottom of the movable rod. A guide block with an isosceles triangular structure when viewed from above is connected to one end of the movable rod near the first mounting groove.

[0011] Furthermore, the movable cylinder is fixed with snap-fit ​​teeth on its side, and a limiting rack is fixed in the movable cavity above the snap-fit ​​teeth. The limiting rack has a serrated cross-section and is engaged with the snap-fit ​​teeth.

[0012] Furthermore, a second mounting groove is provided at the end of the second connecting rod, the lifting airbag is located in the second mounting groove, the end of the movable through hole away from the first mounting groove passes through the second connecting rod and communicates with the second mounting groove, the end of the inflation tube away from the lifting airbag is fixedly connected to the movable rod, and the inflation connecting tube is located in the movable cavity.

[0013] Furthermore, an elastic deformation pad is fixedly provided on the outer side of the lifting airbag, and a pull rope is fixedly provided at both ends of the deformation pad. The pull rope passes through the second mounting groove and the movable through hole, and the movable rod is provided with an adjustment mechanism for adjusting the length of the pull rope.

[0014] Furthermore, the adjustment mechanism includes an adjustment screw threadedly connected to the moving rod, and a limiting plate is provided around the adjustment screw, the limiting plate being located within the movable cavity.

[0015] Furthermore, the operating handle has a limiting thread groove that communicates with the moving through hole. The limiting thread groove matches the adjusting screw, and a hemispherical limiting block is connected to the limiting thread groove by a third spring. The top of the hemispherical limiting block passes through the limiting thread groove.

[0016] The beneficial effects of this invention are: compared with the prior art, the improvement of this invention lies in that... 1. In the instrument for peeling the maxillary sinus mucosa of the present invention, one end of the operating handle is connected to the peeling head and the other end is connected to the lifting balloon. The peeling head can perform the function of the dome-shaped sinus spatula in the prior art, and the lifting balloon can perform the function of the maxillary sinus lifting balloon in the prior art. By integrating the dome-shaped sinus spatula and the maxillary sinus lifting balloon in the prior art into one instrument, the surgeon does not need to change the surgical instruments during use, which is convenient and improves the surgical effect.

[0017] 2. In the instrument for peeling the maxillary sinus mucosa of the present invention, two 1 / 4 spherical peeling heads form a mushroom head structure, which can achieve separation of the sinus floor from the sinus membrane. Then, the movable cylinder can drive the entire movable rod to move back and forth. When the movable rod moves towards the 1 / 4 spherical peeling head, it can push the two fixed rods through the guide block, thereby driving the two connecting shafts to rotate. The rotation of the connecting shafts drives the upper movable shaft and the lower movable shaft to rotate, thereby driving the two 1 / 4 spherical peeling heads to rotate to be staggered, thus achieving a larger range of peeling. When the movable rod moves towards the end of the lifting airbag, the push on the fixed rod is released. Through the elasticity of the first spring, the two 1 / 4 spherical peeling heads can rotate back to the adjoining state.

[0018] 3. In the instrument for peeling the maxillary sinus mucosa of the present invention, when moving the movable cylinder back and forth, the movable cylinder is first pressed down to make it slide on the movable rod, and drive the locking teeth and the limiting rack to separate. In this way, when the movable cylinder is pushed, the movable rod can slide synchronously. The movable rod can push the guide block to contact the fixed rod or push the lifting airbag outside the second connecting rod. When it is necessary to maintain the stability of the movable rod position, the pressing of the movable cylinder can be stopped. In this way, through the elasticity of the second spring, the locking teeth and the limiting rack can be engaged at different positions, thereby ensuring the stability of the movable rod.

[0019] 4. In the device for peeling the maxillary sinus mucosa in this invention, air is inflated into the lifting balloon, which can be used to peel and lift the maxillary sinus mucosa over a large area. A deformation pad is attached and fixed to the outer surface of the inflated balloon. By adjusting the rotation of the screw, the pull rope can be extended and retracted, thereby adjusting the shape of the deformation pad and thus the shape of the front end of the lifting balloon, so that it can be adaptively adjusted according to the range and shape to be peeled and lifted. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of the instrument for peeling off the maxillary sinus mucosa according to the present invention.

[0021] Figure 2 This is a cross-sectional view of the internal structure of the instrument for peeling off the maxillary sinus mucosa according to the present invention.

[0022] Figure 3 This is a front view of the internal structure of the first connecting rod of the present invention.

[0023] Figure 4 This is a side view of the internal structure of the first connecting rod of the present invention.

[0024] Figure 5 This is a top view of the guide block structure of the present invention.

[0025] Figure 6 This is a cross-sectional view of the internal structure of the part of the operating handle near the first connecting rod of the present invention.

[0026] Figure 7 This is a side view of the movable cylinder and snap-fit ​​tooth structure of the present invention.

[0027] Figure 8 This is a schematic diagram of the internal structure of the movable cylinder of the present invention.

[0028] Figure 9 This is a schematic diagram of the internal structure of the second connecting rod and the operating handle for improving the airbag in its uninflated state according to the present invention.

[0029] Figure 10 This is a schematic diagram of the internal structure of the second connecting rod and the operating handle for improving the airbag inflation state according to the present invention.

[0030] Figure 11 This is a schematic diagram of the airbag structure of the present invention.

[0031] Figure 12 This is a schematic diagram of the internal structure of the part of the operating handle near the second connecting rod of the present invention.

[0032] Wherein: 1-Operating handle, 2-First connecting rod, 201-First mounting slot, 3-Second connecting rod, 301-Second mounting slot, 4-Upper movable shaft, 5-Lower movable shaft, 6-1 / 4 spherical peeling head, 7-Lifting airbag, 8-Inflation tube, 9-Inflation connecting tube, 10-Connecting shaft, 11-First spring, 12-Fixing rod, 13-Ball bearing, 14-Moving cavity, 15-Moving cylinder, 16-Second spring, 17-Moving rod, 18-Moving through hole, 19-Moving rod, 20-Guide block, 21-Snap-fit ​​tooth, 22-Limiting rack, 23-Deformation pad, 24-Pull rope, 25-Adjusting screw, 26-Limiting plate, 27-Limiting threaded groove, 28-Third spring, 29-Hemispherical limiting block. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] See attached document Figure 1-12 The instrument shown includes an operating handle 1, with a first connecting rod 2 and a second connecting rod 3 fixed at both ends of the operating handle 1. The operating handle 1, the first connecting rod 2, and the second connecting rod 3 form an integral structure. For ease of gripping and operation, anti-slip textures are provided on the outer side wall of the operating handle 1. An upper movable shaft 4 and a lower movable shaft 5 are rotatably connected within the first connecting rod 2. The upper movable shaft 4 and the lower movable shaft 5 are symmetrically arranged, and both the upper movable shaft 4 and the lower movable shaft 5 penetrate the first connecting rod 2. A 1 / 4 spherical dissection head 6 is fixed at the end of each of the upper movable shaft 4 and the lower movable shaft 5. The four spherical peeling heads 6 are in contact with each other but not connected. When two 1 / 4 spherical peeling heads 6 are attached to each other, they form a mushroom head structure. The second connecting rod 3 is equipped with a lifting airbag 7. The opening of the lifting airbag 7 is connected to an inflation tube 8. The inflation tube 8 moves along the axial direction of the operating handle 1 through the second connecting rod 3 and the operating handle 1. An inflation connecting tube 9 is vertically connected to the inflation tube 8. The inflation connecting tube 9 passes through the operating handle 1 radially. The lifting airbag 7 can be inflated through the inflation connecting tube 9 and the inflation tube 8. The lifting airbag 7 can move along the axial direction of the operating handle 1 and the second connecting rod 3 to the outside of the second connecting rod 3.

[0035] Specifically, the end of the first connecting rod 2 is provided with a first mounting groove 201. The top and bottom of the first mounting groove 201 are rotatably connected to the connecting shaft 10 through bearings. The upper movable shaft 4 and the lower movable shaft 5 are respectively fixedly sleeved on the corresponding connecting shaft 10, and the upper movable shaft 4 and the lower movable shaft 5 rotate in opposite directions. Each connecting shaft 10 is sleeved with a first spring 11. The first spring 11 is a torsion spring structure and can self-reset after the connecting shaft 10 rotates. The ends of the two connecting shafts 10 that are close to each other are fixed with L-shaped fixing rods 12. The fixing rods 12 are symmetrically distributed about the horizontal axis of the first connecting rod 2, and the ends of the two fixing rods 12 away from the connecting shaft 10 are embedded with rolling balls 13. The ends of the two fixing rods 12 with rolling balls 13 are on the same horizontal line.

[0036] The top of the operating handle 1 has a movable cavity 14, and the top of the movable cavity 14 is movably connected to a movable cylinder 15. The top of the movable cylinder 15 passes through the operating handle 1, and the movable cylinder 15 can move along the axial direction of the operating handle 1. The bottom of the movable cylinder 15 has a slot, and a second spring 16 is installed vertically in the slot. The bottom of the second spring 16 is fixed with a movable rod 17, and the bottom of the movable rod 17 slides through the movable cylinder 15. The movable cylinder 15 and the movable rod 17 form a telescopic structure.

[0037] The bottom of the movable cavity 14 is vertically connected to a movable through hole 18, which passes through both ends of the operating handle 1 and is parallel to the axis of the operating handle 1. The movable through hole 18 is connected to the first mounting groove 201. A movable rod 19 is slidably disposed in the movable through hole 18. The movable through hole 18 and the movable rod 19 are matched, and the movable rod 19 will not wobble when moving in the movable through hole 18. The movable rod 19 is fixedly connected to the bottom of the movable rod 17. The end of the movable rod 19 near the first mounting groove 201 is connected to a guide block 20 with an isosceles triangular structure when viewed from above. The movable cylinder 15 can drive the entire movable rod 19 to move back and forth. When the movable rod 19 moves towards the 1 / 4 spherical peeling head 6, the guide block 20 can push the two fixed rods 12, thereby driving the two connecting shafts 10 to rotate. The rotation of the connecting shafts 10 drives the upper movable shaft 4 and the lower movable shaft 5 to rotate, thereby driving the two 1 / 4 spherical peeling heads 6 to rotate back and forth, thus achieving a larger peeling range. When the movable rod 19 moves towards the end of the lifting airbag 7, the push on the fixed rod 12 is released. Through the elasticity of the first spring 11, the two 1 / 4 spherical peeling heads 6 can rotate back to the close-fitting state.

[0038] Furthermore, to enable positioning after the movable cylinder 15 has moved to the desired position, a locking tooth 21 is fixed to the side of the movable cylinder 15. A limiting rack 22 is fixed in the movable cavity 14 above the locking tooth 21. The limiting rack 22 has a serrated cross-section and engages with the locking tooth 21. When the movable cylinder 15 needs to be moved, it is pressed down, disengaging the locking tooth 21 from the limiting rack 22, allowing the movable cylinder 15 to move along the axial direction of the operating handle 1. After the movable cylinder 15 has moved to the desired position, it is released. Under the elastic force of the second spring 16, the movable cylinder 15 moves upward, causing the locking tooth 21 to move upward and engage with the limiting rack 22, thus fixing the position of the movable cylinder 15.

[0039] Furthermore, a second mounting groove 301 is provided at the end of the second connecting rod 3. The lifting airbag 7 is located in the second mounting groove 301. The end of the movable through hole 18 away from the first mounting groove 201 passes through the second connecting rod 3 and communicates with the second mounting groove 301. The end of the inflation tube 8 away from the lifting airbag 7 is fixedly connected to the movable rod 19, and the inflation connecting tube 9 is located in the movable cavity 14. The inflation connecting tube 9 can move along the axial direction of the operating handle 1 within the movable cavity 14. When the movable rod 19 moves, it can drive the entire inflation tube 8 and the inflation connecting tube 9 to move synchronously. When the lifting airbag 7 moves outside the second connecting rod 3, the inflation connecting tube 9 is connected to an external air source. Inflation can be performed on the lifting airbag 7 through the inflation connecting tube 9 and the inflation tube 8, thereby performing large-area dissection and lifting of the sinus floor and sinus membrane.

[0040] To limit the lifting and detachment of the sinus floor from the sinus membrane, an elastic deformation pad 23 is fixed to the outer surface of the lifting airbag 7. Pull ropes 24 are fixed to both ends of the deformation pad 23, passing through the second mounting groove 301 and the movable through hole 18. An adjustment mechanism for adjusting the length of the pull ropes 24 is provided on the movable rod 19. The adjustment mechanism includes an adjusting screw 25 threadedly connected to the movable rod 19. The top of the adjusting screw 25 passes through the operating handle 1. A limiting plate 26 is fitted around the adjusting screw 25, located within the movable cavity 14, to prevent the adjusting screw 25 from disengaging from the movable rod 19 during upward movement.

[0041] To provide space for downward adjustment of the moving rod 19, a limiting threaded groove 27 communicating with the moving through hole 18 is provided in the operating handle 1. The limiting threaded groove 27 matches the adjusting screw 25, and a hemispherical limiting block 29 is connected to the limiting threaded groove 27 through a third spring 28. The top of the hemispherical limiting block 29 passes through the limiting threaded groove 27 but does not affect the left and right movement of the moving rod 19. When the moving rod 19 moves to the position corresponding to the adjusting screw 25 and the hemispherical limiting block 29, rotating the adjusting screw 25 downward will compress the hemispherical limiting block 29, thereby compressing the third spring 28 and providing space for the adjusting screw 25 to move downward. When the adjusting screw 25 rotates upward and downward, it will drive the pull rope 24 to extend and retract, thereby adjusting the shape of the deformation pad 23 and thus adjusting the shape of the lifting airbag 7.

[0042] The working principle of this invention: When using the device of this invention, two 1 / 4 spherical dissecting heads 6 are first used to separate the sinus base and sinus membrane of the patient. During the separation process, the moving cylinder 15 drives the entire moving rod 19 to move back and forth. When the moving rod 19 moves towards the 1 / 4 spherical dissecting head 6, the guide block 20 pushes the two fixed rods 12, which in turn drives the two connecting shafts 10 to rotate. The rotation of the connecting shafts 10 drives the upper moving shaft 4 and the lower moving shaft 5 to rotate, thereby driving the two 1 / 4 spherical dissecting heads 6 to rotate back and forth, thus achieving a larger range of dissection. When the moving rod 19 moves towards the end of the lifting airbag 7, the push on the fixed rod 12 is released. Through the elasticity of the first spring 11, the two 1 / 4 spherical dissecting heads 6 can rotate back to the close-fitting state.

[0043] Then, using the other end of the instrument, the movable cylinder 15 is moved in the opposite direction, moving the lifting airbag 7 outside the second connecting rod 3. At this time, the position of the adjusting screw 25 corresponds to that of the hemispherical limiting block 29. Inflation is carried into the lifting airbag 7 through the inflation connecting tube 9 and the inflation tube 8, thereby performing large-area dissection and lifting of the sinus floor and sinus membrane. During the inflation process, the adjusting screw 25 is rotated, which drives the pull rope 24 to extend and retract, thereby adjusting the shape of the deformation pad 23, and thus adjusting the shape of the lifting airbag 7.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An instrument for peeling the maxillary sinus mucosa, comprising an operating handle (1), wherein a first connecting rod (2) and a second connecting rod (3) are respectively fixed at both ends of the operating handle (1), characterized in that: The first connecting rod (2) is rotatably connected to an upper movable shaft (4) and a lower movable shaft (5). The upper movable shaft (4) and the lower movable shaft (5) both pass through the first connecting rod (2). The ends of the upper movable shaft (4) and the lower movable shaft (5) are both fixed with a 1 / 4 spherical peeling head (6). The two 1 / 4 spherical peeling heads (6) are in contact with each other but not connected. The second connecting rod (3) is movably provided with a lifting airbag (7). The opening of the lifting airbag (7) is connected with an inflation tube (8). The inflation tube (8) moves along the axial direction of the operating handle (1) and passes through the second connecting rod (3) and the operating handle (1). The inflation tube (8) is vertically connected with an inflation connecting tube (9). The inflation connecting tube (9) passes through the operating handle (1) radially.

2. The instrument for peeling off the maxillary sinus mucosa according to claim 1, characterized in that: The first connecting rod (2) has a first mounting groove (201) at its end. The top and bottom of the first mounting groove (201) are rotatably connected to a connecting shaft (10). The upper movable shaft (4) and the lower movable shaft (5) are respectively fixed on the corresponding connecting shaft (10). The upper movable shaft (4) and the lower movable shaft (5) rotate in opposite directions.

3. The instrument for peeling off the maxillary sinus mucosa according to claim 2, characterized in that: Each of the connecting shafts (10) is fitted with a first spring (11), and a fixing rod (12) is fixed at one end of each of the two connecting shafts (10) that is close to each other. The fixing rods (12) are symmetrically distributed about the horizontal axis of the first connecting rod (2), and a ball bearing (13) is embedded and rolled at one end of each of the two fixing rods (12) away from the connecting shaft (10). The ends of the two fixing rods (12) with the ball bearing (13) are on the same horizontal line.

4. The instrument for stripping the maxillary sinus mucosa according to claim 2, characterized in that: The operating handle (1) has a movable cavity (14) inside, and a movable cylinder (15) is movably inserted through the top of the movable cavity (14). A second spring (16) is fixed inside the movable cylinder (15), and a movable rod (17) is fixed at the bottom of the second spring (16). The bottom of the movable rod (17) passes through the movable cylinder (15). The bottom of the movable cavity (14) is vertically connected to a movable through hole (18), which is parallel to the axis of the operating handle (1) and is connected to the first mounting groove (201). A movable rod (19) is slidably provided in the movable through hole (18), and the movable rod (19) is fixedly connected to the bottom of the movable rod (17). A guide block (20) with an isosceles triangle structure in plan view is connected to one end of the movable rod (19) near the first mounting groove (201).

5. The instrument for peeling off the maxillary sinus mucosa according to claim 4, characterized in that: The movable cylinder (15) has a snap-fit ​​tooth (21) fixed on its side. A limiting tooth (22) is fixed in the movable cavity (14) above the snap-fit ​​tooth (21). The limiting tooth (22) has a serrated cross section and is engaged with the snap-fit ​​tooth (21).

6. The instrument for peeling off the maxillary sinus mucosa according to claim 4, characterized in that: The end of the second connecting rod (3) is provided with a second mounting groove (301). The lifting airbag (7) is located in the second mounting groove (301). The end of the movable through hole (18) away from the first mounting groove (201) passes through the second connecting rod (3) and communicates with the second mounting groove (301). The end of the inflation tube (8) away from the lifting airbag (7) is fixedly connected to the movable rod (19), and the inflation connecting tube (9) is located in the movable cavity (14).

7. The instrument for peeling off the maxillary sinus mucosa according to claim 6, characterized in that: An elastic deformation pad (23) is fixed on the outer side of the lifting airbag (7). Pull ropes (24) are fixed at both ends of the deformation pad (23). The pull ropes (24) pass through the second mounting groove (301) and the moving through hole (18). An adjustment mechanism for adjusting the length of the pull ropes (24) is provided on the moving rod (19).

8. The instrument for peeling off the maxillary sinus mucosa according to claim 7, characterized in that: The adjustment mechanism includes an adjustment screw (25) threadedly connected to the moving rod (19), and a limiting plate (26) is provided on the outer sleeve of the adjustment screw (25), and the limiting plate (26) is located in the movable cavity (14).

9. The instrument for peeling off the maxillary sinus mucosa according to claim 8, characterized in that: The operating handle (1) has a limiting thread groove (27) that communicates with the moving through hole (18). The limiting thread groove (27) matches the adjusting screw (25). A hemispherical limiting block (29) is connected to the limiting thread groove (27) through a third spring (28). The top of the hemispherical limiting block (29) passes through the limiting thread groove (27).

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