Metaphyseal distraction osteotomy reduction device for treating ulnar strike syndrome through wrist arthroscope

Abstract

The invention discloses a metaphyseal distraction osteotomy reduction device for treating ulnar impingement syndrome through a wrist arthroscope. The device comprises a bottom plate, and a surrounding mechanism, a distraction mechanism, an osteotomy mechanism and a reduction mechanism are fixedly installed on the bottom plate; the encircling mechanism is provided with a placing space conforming to the far end of the ulna of the wrist joint of the human body; the distraction mechanism is used for distraction of skin tissue around the metaphysis and exposure of an ulnar metaphysis osteotomy area. The reset mechanism resets the ulna bone after osteotomy through a reset hook, and a screw guide needle is arranged in the ulna bone according to a kirschner wire guide hole in the ulna bone. The device has the advantages of structural integration, ergonomic design, accurate distraction and osteotomy, powerful reset function and the like, and an efficient, safe and accurate solution is provided for treating ulnar impingement syndrome through a wrist arthroscope.

Description

Technical Field

[0001] The invention relates to a medical device, and more specifically, to an epiphyseal distraction osteotomy reduction device for arthroscopic treatment of ulnar impaction syndrome of the wrist joint. Background Art

[0002] Ulnar impaction syndrome (UIS) is a common cause of ulnar wrist pain caused by overloading of the ulnocarpal joint. UIS is associated with static or dynamic ulnar positive variance. If not treated promptly, it may lead to wear and perforation of the triangular fibrocartilage complex (TFCC), chondral degeneration of the triquetrum, lunate or ulnar head. For patients who are ineffective with conservative treatment, the most commonly used surgical treatment methods include mechanical decompression of the overloaded ulnocarpal joint by reducing ulnar positive variance. There are various options for ulnar shortening, including diaphyseal ulnar shortening osteotomy (DUSO), Wafer procedure with ulnar head resection, and metaphyseal ulnar shortening osteotomy (MUSO), which can effectively reduce the intra-articular pressure of the overloaded ulnar side of the carpus. Numerous USO techniques have different osteotomy positions and directions, plate positions, and types or sizes of fixation devices to avoid complications such as nonunion and local irritation of the plate. However, MUSO usually performs wedge osteotomy at the metaphyseal part of the ulna and uses cannulated screws for fixation, with a smaller and more minimally invasive incision. Although UIS is usually associated with ulnar positive variance, UIS has also been found in patients with ulnar neutral or negative variance. In addition, the thickness of the TFCC is negatively correlated with ulnar positive variance. Previous studies have reported that simple arthroscopic TFCC debridement cannot relieve ulnocarpal joint pain caused by obvious ulnar positive variance or other wrist pathologies. In addition, ulnar positive variance may increase the risk of TFCC wear or perforation. Studies by Bernstein et al. have shown that arthroscopic TFCC debridement combined with USO can effectively treat UIS. However, Saito et al. pointed out that ulnar positive variance may affect the results of TFCC debridement. Therefore, USO can reduce the mechanical pressure of the ulnocarpal joint from a biomechanical perspective and relieve ulnocarpal pain associated with UIS. Compared with arthroscopic TFCC debridement combined with USO, arthroscopic TFCC debridement combined with metaphyseal ulnar osteotomy shortening is a more minimally invasive treatment method, with lower rates of secondary surgery and tendinitis. DUSO is a commonly used USO and is widely used to treat UIS because it can satisfactorily relieve ulnocarpal pain. The diaphysis of the ulna is the most common osteotomy site. However, DUSO is associated with many complications, including secondary surgical removal of the fixation plate, catastrophic delayed union or nonunion at the osteotomy site, postoperative tendinitis, and accidental residual ulnar positive variance. In addition, the position of the plate on the volar or dorsal ulnar surface may cause different regional reactions, such as postoperative tendinitis, symptomatic plate irritation, etc. Although studies have shown that DUSO and MUSO have similar treatment effects, MUSO has fewer complications compared with DUSO.Cha et al. suggested that osteoporosis patients in the United States should avoid using DUSO because delayed union or nonunion occasionally occurs after DUSO. Smoking and the osteotomy site also affect the outcome of postoperative pain relief. The morphology of the distal radioulnar joint (DRUJ) affects the effect of USO in the treatment of UIS. DRUJ arthritis after USO can cause ulnar wrist pain due to DRUJ incoordination and even damage wrist function. MUSO can better relieve ulnar wrist pain, reduce the nonunion rate, and reduce the secondary surgery rate. Kitano et al. first reported the metaphyseal ulnar shortening osteotomy (MUSO) in 1993. In this operation, a wedge-shaped bone block at the distal metaphyseal of the ulna is resected, the ulnar head is rotated to the radial-proximal side, and fixed with a cannulated headless compression screw. During this process, a cannulated headless compression screw needs to be inserted into the intramedullary area from the distal end of the ulnar head. The results of the meta-study show that MUSO has the characteristics of minimally invasive incision, less trauma, and fast healing, and is increasingly valued clinically. However, as a new surgical plan and technology, the corresponding osteotomy and shortening fixation instruments are still not reported, which increases the clinical operation difficulty and promotion effect. Effective exposure of the surgical area, accurate osteotomy angle, stable temporary maintenance of compression shortening, and accurate insertion direction of the screw with holding force are all the surgical technical points of the metaphyseal ulnar osteotomy shortening operation. Summary of the Invention

[0003] The object of the present invention is to provide a metaphyseal distraction osteotomy reduction device for arthroscopic treatment of ulnar impaction syndrome, so as to solve the problems in the operation of the metaphyseal ulnar osteotomy shortening operation in the prior art, and to meet the requirements in medical auxiliary equipment for effective exposure of the surgical area, protection of important tissues, accurate osteotomy angle, stable temporary maintenance of compression shortening, accurate insertion direction of the screw with holding force, etc.

[0004] To achieve the above object, the present invention adopts the following technical solutions: A metaphyseal distraction osteotomy reduction device for arthroscopic treatment of ulnar impaction syndrome, the device includes a bottom plate, and a surrounding mechanism, a distraction mechanism, an osteotomy mechanism, and a reduction mechanism are fixedly installed on the bottom plate; The surrounding mechanism is provided with a placement space conforming to the human wrist joint; The distraction mechanism includes two distraction claws, symmetrically arranged on both sides of the placement space, and can move along the X axis direction to distract the skin tissue around the metaphyseal.

[0005] The osteotomy mechanism is set as an articulated osteotome base one and an osteotome base two, wherein the articulated end is fixedly installed on the surrounding mechanism two through a fixing pin, and the other two ends are fixedly installed on the surrounding mechanism one. Osteotomy angle adjusters and saw blade guides are provided on the osteotome base one and the osteotome base two.

[0006] As a further optimization of the present invention, the device further includes a reset mechanism, which can move the reset mechanism downward along the Y-axis, that is, move the metaphysis along its axial direction, and can also rotate the reset mechanism left and right.

[0007] As a further optimization of the present invention, the reset mechanism includes a U-shaped bracket fixedly installed on the bottom plate. A reset rod passes through the U-shaped bracket, and an adjusting nut threadedly connected thereto is arranged on the reset rod. The adjusting nut is installed inside the U-shaped bracket. One end of the reset rod is equipped with a reset hook, and a Kirschner wire guiding hole is arranged on the reset hook. The reset hook, the placement space and the moving space of the two spreading claws together form a surgical area for surgical use; an arc-shaped chute is arranged on the base of the bracket, and a bolt for fixing the bracket and the bottom plate is installed in the arc-shaped chute, and a radian line is arranged on the outer periphery of the arc-shaped chute.

[0008] As a further optimization of the present invention, the surrounding mechanism includes a surrounding component assembly one and a surrounding component assembly two. The surrounding component assembly one and the surrounding component assembly two form a placement space conforming to the human wrist joint, and a control mechanism for controlling the opening and closing of the surrounding mechanism is arranged on the surrounding mechanism.

[0009] As a further optimization of the present invention, the control mechanism includes a titanium cable hole arranged on the surrounding component assembly two. A titanium cable passes through the titanium cable hole. One end of the titanium cable is equipped with an unlocking switch, and a lifting component is sleeved outside the unlocking switch. Interconnected top screw holes are arranged on the lifting component and the unlocking switch, and a top screw for locking the titanium cable is installed therein. The bottom end of the top screw abuts against the titanium cable.

[0010] As a further optimization of the present invention, a groove is arranged on the end surface of the surrounding component assembly one. A guiding groove in the same direction as the opening direction of the groove is arranged on the side wall of the groove. An installation hole one for a positioning pin one is arranged in the guiding groove. A protrusion matching the groove is arranged on the end surface of the surrounding component assembly two forming a closed surface with the surrounding component assembly one. A limiting groove is arranged on the protrusion, and an installation hole two and a limiting pin hole communicated with the installation hole two are arranged on the protrusion on both sides of the limiting groove. A positioning pin one and a limiting pin are respectively installed in the installation hole two and the limiting pin hole; the titanium cable is divided into two strands in the limiting groove and is respectively installed with a spring and a positioning pin one in sequence, and the limiting pin can slide in a chute arranged on the positioning pin one.

[0011] As a further optimization of the present invention, the spreading mechanism includes a driving mechanism for simultaneously driving the two spreading claws to move in opposite directions.

[0012] As a further optimization of the present invention, the driving mechanism includes a screw rod and a guide rod. Through holes are arranged on the left and right of the spreading claws of the spreading mechanism. The screw rod is threadedly connected with the through holes, and the guide rod can slide in the through holes.

[0013] As a further optimization of the present invention, the osteotome base 1 and the osteotome base 2 are both provided with a slide rod, the slide rod is provided with an osteotomy saw blade guide that can slide along the slide rod, and the osteotomy saw blade guide is provided with a saw blade guide groove.

[0014] As a further optimization of the present invention, both the guide rod and the adjusting screw are provided with scales.

[0015] As a further optimization of the present invention, the reducer is reduced and pressurized along the slide rod, and a guide pin is inserted into the guide hole and the guide screw is accurately fixed.

[0016] Compared with the prior art, the present invention has the following beneficial effects: High Precision: The device's embracing mechanism is designed to accommodate the human wrist, ensuring stability and accuracy during surgery and providing precise positioning for osteotomy. The design of the distraction and osteotomy mechanisms allows for more precise and controllable distraction and osteotomy procedures, helping to reduce surgical errors and improve treatment outcomes.

[0017] Less trauma: The distraction mechanism expands the skin tissue around the epiphysis, avoiding the large incision required in traditional surgery, thereby reducing surgical trauma and postoperative scar formation. The osteotomy mechanism adopts an articulated design, which can ensure osteotomy accuracy while reducing secondary damage to surrounding vital tissues.

[0018] Ease of Use: The device's design makes the procedure simpler and more intuitive. Surgeons can easily perform distraction, osteotomy, reduction, and fixation by adjusting the position and angle of the distraction jaws and osteotomy saw blade. The osteotomy mechanism utilizes a hinged joint and fixed pin design, making the osteotomy process more stable and controllable, reducing surgical difficulty and time.

[0019] Faster recovery: Due to minimal surgical trauma and high precision, patients recover faster after surgery and are able to regain wrist function and range of motion sooner. The device is also designed with patient comfort in mind, helping to reduce postoperative pain and discomfort, and improving their quality of life.

[0020] Highly adaptable: The device is suitable for treating patients with ulnar impaction syndrome of varying heights, enabling personalized surgical procedures based on the patient's specific circumstances. The design of the distraction and osteotomy mechanisms offers a degree of adjustability to accommodate different patient anatomy and surgical needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the three-dimensional structure of the invention; Figure 2 for Figure 1 Schematic diagram of the structure of the middle embracing mechanism; Figure 3 forFigure 1 Structural diagram from another angle; Figure 4 It is a structural diagram of the encircling component 1 in the invention; Figure 5 It is the control mechanism of the embracing mechanism in the invention; Figure 6 A schematic diagram of the structure in which the control mechanism of the invention is installed in the second embracing component; Figure 7 It is a structural diagram of the expansion mechanism in the invention; Figure 8 It is a structural diagram of the osteotomy mechanism in the invention; Figure 9 It is a structural diagram of the reset mechanism in the invention; Figure numerals: 1. Encircling mechanism; 11. Encircling component 1; 12. Titanium cable; 13. Encircling component 2; 14. Unlocking switch; 15. Top screw; 16. Lifting member; 17. Limit pin; 18. Positioning pin; 19. Spring; 2. Osteotomy mechanism; 21. Osteotomy base; 22. Guide groove; 23. Positioning pin 2; 24. Osteotomy saw blade guide; 3. Spreading mechanism; 31. Spreading claw; 32. Adjusting screw; 33. Guide rod; 34. Scale; 4. Reset mechanism; 41. Bottom plate; 42. Reset hook; 43. Adjusting nut; 44. Base; 45. Curvature line; 46. Guide notch; 47. Mounting hole; 48. Limit pin hole; 49. Groove; 50. Limiting groove; 51. Kirschner wire guide hole. DETAILED DESCRIPTION

[0022] like Figures 1-9 As shown, a metaphyseal distraction and osteotomy reduction device for wrist arthroscopic treatment of ulnar impaction syndrome comprises a base plate 41 on which an embracing mechanism 1, a distraction mechanism 3, and an osteotomy mechanism 2 are fixedly mounted.

[0023] like Figures 2-6 As shown, the embracing mechanism 1 is provided with a placement space that conforms to the human wrist joint. The embracing mechanism 1 includes an embracing component assembly 1 11 and an embracing component assembly 2 13. The embracing component assembly 1 11 and the embracing component assembly 2 13 form a placement space that conforms to the human wrist joint. The embracing mechanism 1 is provided with a control mechanism that controls the opening and closing of the embracing mechanism 1.

[0024] like Figure 2 As shown, the control mechanism includes a titanium cable 1 hole provided on the encircling member component 2 13, a titanium cable 12 passes through the titanium cable 1 hole, an unlocking switch 14 is installed at one end of the titanium cable 12, a lifting member 16 is sleeved on the outer side of the unlocking switch 14, and the lifting member 16 and the unlocking switch 14 are provided with interconnected top screw holes, in which a top screw 15 for locking the titanium cable 12 is installed, and the bottom end of the top screw 15 contacts the titanium cable 12.

[0025] As shown Figure 4 in the figure, a groove 49 is provided on the end face of the first surrounding component assembly. A guiding groove 46 is provided on the side wall of the groove 49, and a first mounting hole 47 for a positioning pin is provided in the guiding groove 46. On the end face of the second surrounding component assembly that forms a closed surface with the first surrounding component assembly, a protrusion matching the groove is provided. A limiting groove 50 is provided on the protrusion, and a second mounting hole and a limiting pin hole 48 communicating with the second mounting hole are provided on the protrusion on both sides of the limiting groove 50. A positioning pin 18 and a limiting pin 17 are respectively installed in the second mounting hole and the limiting pin hole 48; after the titanium cable 12 is divided into two strands in the limiting groove, a spring 19 and a positioning pin 18 are successively installed respectively, and the limiting pin 17 can slide in a sliding groove provided on the positioning pin 18.

[0026] The working principle of the surrounding mechanism is as follows: The design of the surrounding mechanism 1 aims to simulate the natural shape of the human wrist joint and provide a comfortable placement space for users. When the user's ulna of the wrist is placed between the first surrounding component assembly 11 and the second surrounding component assembly 13, the control mechanism starts to function. By operating the unlocking switch 14, the titanium cable 12 is pulled or released in the titanium cable hole, thereby controlling the opening and closing of the first surrounding component assembly 11 and the second surrounding component assembly 13. One end of the titanium cable 12 is connected to the unlocking switch 14, and the lifting member 16 is sleeved outside the unlocking switch. The first hole for the set screw on both of them is locked by the set screw 15 to ensure that the titanium cable 12 remains stable when stressed. When the bottom end of the set screw 15 tightly abuts the titanium cable 12, the entire surrounding mechanism is in a locked state, firmly fixing the ulna of the wrist. In addition, the protrusion on the first surrounding component assembly 11 matches the groove on the second surrounding component assembly 13, and the sliding of the limiting pin 17 in the sliding groove of the positioning pin 18 further enhances the stability and accuracy of the surrounding.

[0027] The design advantages of the surrounding mechanism are as follows: Ergonomic design: The placement space of the surrounding mechanism 1 conforms to the natural curve of the human wrist joint, providing a fitting and comfortable support for users and reducing the discomfort that may be brought about by long-term use.

[0028] Flexible and controllable: Through the combination of the titanium cable 12, the unlocking switch 14 and the lifting member 16, users can easily control the opening and closing of the surrounding mechanism, with simple operation and rapid response.

[0029] Stable locking: The combined use of the set screw 15 and the titanium cable 12 ensures the stability of the surrounding mechanism in the locked state, effectively preventing accidental loosening or opening and enhancing the safety of use.

[0030] Precise positioning: The protrusions on the first component 11 of the surrounding component match the grooves on the second component 13 of the surrounding component. Coupled with the sliding design of the limit pin 17 in the chute of the positioning pin 18, it not only enhances the stability of the surrounding, but also ensures the precise positioning of the surrounding mechanism when it is closed, further improving the user experience.

[0031] As Figure 7 shown, the spreading mechanism 3 includes two spreading claws 31, which are symmetrically arranged on both sides of the placement space and can move along the X-axis direction to spread the skin tissue around the metaphysis. The spreading mechanism 3 includes a driving mechanism for simultaneously driving the two spreading components to spread or close. The driving mechanism includes a screw rod and a guide rod. Through holes are provided on both the left and right sides of the spreading claws 31 of the spreading mechanism 3. The screw rod is threadedly connected to the through holes, and the guide rod can slide in the through holes. Scales 34 are provided on both the guide rod 33 and the adjusting screw rod 32 for measuring the distance of skin spreading.

[0032] The working principle of the spreading mechanism is as follows: The core of the spreading mechanism 3 consists of two symmetrically distributed spreading claws 31, which are cleverly arranged on both sides of the placement space. These spreading claws 31 can not only firmly support the structure, but also move flexibly along the X-axis direction. When it is necessary to spread the skin tissue around the metaphysis, the driving mechanism plays a key role. The driving mechanism integrates the design of a screw rod and a guide rod. Through holes are carefully provided on both the left and right sides of the spreading claws 31. The screw rod is tightly connected to these through holes by threads, and the guide rod can smoothly shuttle in the through holes. As the screw rod rotates, the spreading claws 31 will slowly move along the axial direction of the screw rod, thereby realizing the functions of spreading or closing. At the same time, in order to ensure the accuracy of the spreading distance, scales 34 are carefully engraved on both the guide rod 33 and the adjusting screw rod 32. These scales provide an intuitive visual reference for the operator, facilitating them to accurately measure the distance of the skin being spread.

[0033] The design advantages of the spreading mechanism are as follows: Efficient cooperation: The symmetric design of the spreading claws 31 and the integration of the driving mechanism ensure the smoothness and efficiency of the spreading action. The two work together, not only improving the spreading efficiency, but also ensuring the stability of the operation.

[0034] Precise control: The threaded connection between the screw rod and the through holes, as well as the sliding design of the guide rod, enable the spreading action to be accurate to the millimeter level. This fine adjustment ability is crucial for the accuracy of surgical operations.

[0035] Intuitive measurement: The scale design on the guide rod and the adjusting screw rod provides an intuitive measurement means for the operator. This design not only simplifies the operation process, but also improves the accuracy of the surgery and reduces the surgical risk.

[0036] AsFigure 8 As shown, the osteotomy mechanism 2 is arranged as the osteotome base body 21-1 and the osteotome base body 21-2 which are hinged. The hinged end is fixedly installed on the surrounding mechanism 1-2 through a fixing pin 23, and the other two ends are fixedly installed on the surrounding mechanism 1-1. Slide bars are arranged on both the osteotome base body 21-1 and the osteotome base body 21-2. An osteotome saw blade guide 24 capable of sliding along the slide bar is arranged on the slide bar, and a saw blade guide groove 22 is arranged on the osteotome saw blade guide 24.

[0037] As Figure 9 As shown, the device further includes a reset mechanism. The reset mechanism 4 includes a U-shaped bracket fixedly installed on the base plate 41. A reset rod penetrates through the U-shaped bracket. An adjusting nut 43 threadedly connected thereto is arranged on the reset rod. The adjusting nut 43 is installed inside the U-shaped bracket. One end of the reset rod is installed with a reset hook 42. A Kirschner wire guide hole 51 is arranged on the reset hook. The reset hook 42, the placement space and the moving space of the two spreading claws 31 together form an operation area for surgical use. An arc-shaped chute is arranged on the base 44 of the bracket. A bolt for fixing the bracket and the base plate 41 is installed in the arc-shaped chute. An arc line 45 is arranged on the outer periphery of the arc-shaped chute. The sliding rod is driven by a knob to perform a reset pressurization effect along the ulnar side edge of the ulna towards the proximal end of the ulna.

[0038] The metaphyseal spreading osteotomy reset device for arthroscopic treatment of ulnar impaction syndrome has the advantages of high precision, small trauma, simple operation, fast recovery and strong adaptability, and can provide a safer and more effective surgical treatment plan for patients.

Claims

1. A metaphyseal distraction osteotomy reduction device for arthroscopic treatment of ulnar impaction syndrome, characterized in that, The device includes a bottom plate, on which a surrounding mechanism, a spreading mechanism, an osteotomy mechanism, and a reduction mechanism are fixedly installed; The surrounding mechanism is provided with a placement space conforming to the metaphyseal end of the ulna in the human wrist joint; The spreading mechanism includes two spreading claws, symmetrically arranged on both sides of the placement space and capable of moving along the X-axis direction, for spreading the skin tissue around the metaphyseal end and fully exposing the distal radioulnar joint and the ulnar head; The osteotomy mechanism is set as an osteotome base one and an osteotome base two which are hinged. The hinged end is fixedly installed on the surrounding mechanism two through a fixing pin, and the other two ends are fixedly installed on the surrounding mechanism one. An osteotomy angle adjuster and a saw blade guide are arranged on the osteotome base one and the osteotome base two.

2. The metaphyseal distraction osteotomy reduction device for wrist arthroscopic treatment of ulnar impaction syndrome according to claim 1, characterized in that, The device further includes a reduction mechanism, which can move the reduction mechanism downward along the Y-axis, can move the metaphyseal end along its axial direction, and can also rotate the reduction mechanism left and right.

3. The metaphyseal distraction osteotomy reduction device for wrist arthroscopic treatment of ulnar impaction syndrome according to claim 2, wherein, The reduction mechanism includes a U-shaped bracket fixedly installed on the bottom plate. A reduction rod passes through the U-shaped bracket. An adjusting nut is arranged on the reduction rod and is threadedly connected thereto. The adjusting nut is installed inside the U-shaped bracket. One end of the reduction rod is installed with a reduction hook, and a Kirschner wire guiding hole is arranged on the reduction hook. The reduction hook, the placement space, and the moving space of the two spreading claws together form an operation area for surgery; an arc-shaped chute is arranged on the base of the bracket, and a bolt for fixing the bracket and the bottom plate is installed in the arc-shaped chute. A radian line is arranged on the outer periphery of the arc-shaped chute.

4. The metaphyseal distraction osteotomy reduction device for wrist arthroscopic treatment of ulnar impaction syndrome according to claim 3, characterized in that, The surrounding mechanism includes a surrounding component assembly one and a surrounding component assembly two. The surrounding component assembly one and the surrounding component assembly two form a placement space conforming to the human wrist joint and are fixed, providing the stability of the whole device and avoiding damage to important vascular, nerve, and tendon tissues on the palmar side by the osteotomy saw blade. A control mechanism for controlling the opening and closing of the surrounding mechanism is arranged on the surrounding mechanism.

5. The metaphyseal distraction osteotomy reduction device for wrist arthroscopic treatment of ulnar impaction syndrome according to claim 4, wherein The control mechanism includes a titanium cable hole arranged on the surrounding component assembly two. A titanium cable passes through the titanium cable hole. One end of the titanium cable is installed with an unlocking switch, and a lifting component is sleeved outside the unlocking switch. The lifting component and the unlocking switch are provided with communicating set screw holes, and a set screw for locking the titanium cable is installed therein. The bottom end of the set screw abuts against the titanium cable.

6. The metaphyseal distraction osteotomy reduction device for arthroscopic treatment of ulnar impaction syndrome according to claim 5, wherein, A groove is arranged on the end face of the surrounding component assembly one. A guide groove in the same direction as the opening direction of the groove is arranged on the side wall of the groove. An installation hole one for a positioning pin one is arranged in the guide groove. A protrusion matching the groove is arranged on the end face of the surrounding component assembly two forming a closed surface with the surrounding component assembly one. A limiting groove is arranged on the protrusion. Installation holes two and limiting pin holes communicating with the installation holes two are arranged on the protrusion on both sides of the limiting groove. A positioning pin one and a limiting pin are respectively installed in the installation holes two and the limiting pin holes; after the titanium cable is divided into two strands in the limiting groove, a spring and a positioning pin one are sequentially installed respectively. The limiting pin can slide in a chute arranged on the positioning pin one.

7. The metaphyseal distraction osteotomy reduction device for arthroscopic treatment of ulnar impaction syndrome according to claim 5, characterized in that, The spreading mechanism includes a driving mechanism for simultaneously driving the two spreading claws to move in the opposite direction.

8. The metaphyseal distraction osteotomy reduction device for arthroscopic treatment of ulnar impaction syndrome according to claim 6, characterized in that, The driving mechanism includes a screw rod and a guide rod. Through holes are arranged on the left and right of the spreading claws of the spreading mechanism. The screw rod is threadedly connected with the through holes, and the guide rod can slide in the through holes.

9. The metaphyseal distraction osteotomy reduction device for wrist arthroscopic treatment of ulnar impaction syndrome according to any one of claims 1-8, characterized in that, The osteotome base body 1 and the osteotome base body 2 are both provided with slide bars, and the slide bars are provided with osteotome saw blade guides that can slide along them. An osteotome saw blade is installed inside the osteotome saw blade guide.

10. The metaphyseal distraction osteotomy reduction device for wrist arthroscopic treatment of ulnar impaction syndrome according to claim 9, wherein, Both the guide rod and the adjusting screw rod are provided with scales.

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