A set of tools for personalized reconstruction of glenoid bone defects

Abstract

The utility model discloses a kind of matching tools of scapula glenoid bone defect personalized reconstruction prosthesis, including fixed link, the surface of fixed link is fixedly connected with handle, the surface of fixed link away from handle is fixedly connected with collet, the inside of collet is clamped with positioning pipe, hollow insertion rod is movably inserted in the inside of positioning pipe, and it is related to medical equipment technical field.The utility model can solve bone block mismatch, not fit, precision is limited, not firm, not satisfied and other problems by using personalized prosthesis and matching tool.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, specifically to a supporting tool for a personalized reconstruction prosthesis for glenoid bone defects. Background Technology

[0002] The glenoid cavity is an important part of the shoulder joint, articulating with the humeral head (the distal end of the upper arm bone) to enable shoulder movement. Anterior shoulder dislocation affects motor function and is clinically common. This condition is often accompanied by glenoid bone defects, which are crucial for preoperative assessment and clinical treatment. If the bone defect exceeds 20% and glenoid bone reconstruction is not performed, the risk of recurrence of dislocation after surgery is as high as 75%. Currently, clinical bone reconstruction surgeries include iliac bone harvesting for glenoid grafting and coracoid process transposition.

[0003] Both surgeries require intraoperative grinding and trimming of the bone blocks to fit snugly against the glenoid fossa. Due to limitations in the precision of manual operation and the distortion of the field of view under arthroscopy, the bone blocks and the glenoid fossa cannot be perfectly matched and fitted, which may result in unsatisfactory shape after fixation. Moreover, the bone blocks are prone to bone resorption after both surgeries, resulting in structural defects that may affect the stability of the shoulder joint. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a set of tools for a personalized reconstruction prosthesis for glenoid bone defects. By using a personalized prosthesis and matching tools, problems such as bone fragment mismatch, poor fit, limited precision, unstable fixation, and unsatisfactory results can be solved.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a supporting tool for a personalized reconstruction prosthesis for scapular bone defects, comprising a fixing rod, a handle fixedly connected to the surface of the fixing rod, a sleeve fixedly connected to the surface of the fixing rod away from the handle, a positioning tube snapped into the inside of the sleeve, a hollow insert rod movably inserted into the inside of the positioning tube, the end face of the hollow insert rod being conical, the end face of the positioning tube being conical, and a positioning block integrally connected to the top of the fixing rod.

[0006] Preferably, the surface of the positioning block abuts against a glenoid grinding template, the surface of the glenoid grinding template has a positioning hole, a connecting rod is fixedly connected to the surface of the glenoid grinding template, a handle is fixedly connected to the end of the connecting rod away from the glenoid grinding template, a glenoid prosthesis abuts against the surface of the glenoid grinding template, a rope is fixedly connected to the surface of the personalized glenoid prosthesis, and a thread guide is movably sleeved on the outer surface of the rope.

[0007] Preferably, the sleeve is C-shaped, and the inner wall of the sleeve abuts against the outer surface of the positioning tube.

[0008] Preferably, the positioning tube has an insertion hole at its center that matches the hollow insert rod, and the outer surface of the hollow insert rod is slidably connected to the inside of the insertion hole.

[0009] Preferably, the end of the positioning block away from the fixing rod is pointed, and the surface of the positioning block abuts against the inside of the positioning hole, and the number of positioning holes is two.

[0010] Preferably, there are two ropes, the diameter of the hollow insert is slightly larger than the diameter of the rope, the inner diameter of the hollow insert is two millimeters, and the glenoid prosthesis is made by 3D printing.

[0011] Beneficial effects

[0012] This invention provides a supporting tool for a personalized reconstruction prosthesis for glenoid bone defects. Compared with the prior art, it has the following advantages:

[0013] 1. This invention relates to a set of tools for a personalized reconstruction prosthesis for glenoid bone defects. By using the personalized prosthesis and the set of tools, problems such as mismatch, non-fitting, limited precision, unstable fixation, and unsatisfactory results can be solved.

[0014] 2. The tooling for this personalized reconstruction prosthesis for glenoid bone defects has two positioning holes. After the positioning block is placed against the inside of the positioning holes, the positions of the two drilled bone tunnels can be located, which helps to avoid drilling position deviation and ensures the correct positioning of the tunnels in the glenoid bone defect area. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram showing the connection between the fixed rod and the hollow insert rod in this utility model;

[0017] Figure 3 This is a schematic diagram of the scapular glenoid grinding template and connecting rod in this utility model;

[0018] Figure 4 for Figure 2 Enlarged view of point A in the middle;

[0019] Figure 5 This is a schematic diagram showing the connection between the glenoid prosthesis and the rope in this utility model.

[0020] In the diagram: 1. Fixing rod; 2. Handle; 3. Clip; 4. Positioning tube; 5. Hollow insert rod; 6. Positioning block; 7. Glenoid grinding template; 71. Positioning hole; 8. Connecting rod; 9. Grip; 10. Glenoid prosthesis; 11. Rope; 12. Thread guide. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 This utility model provides a technical solution: a set of tools for a personalized reconstruction prosthesis for glenoid bone defects, including a fixing rod 1, a handle 2 fixedly connected to the surface of the fixing rod 1, a clip 3 fixedly connected to the surface of the fixing rod 1 away from the handle 2, the glenoid prosthesis 10 is made by 3D printing, a positioning tube 4 is snapped into the inside of the clip 3, the clip 3 is "C" shaped, the inner wall of the clip 3 abuts against the outer surface of the positioning tube 4, a hollow insert 5 is movably inserted into the inside of the positioning tube 4, an insertion hole matching the hollow insert 5 is opened at the center of the inside of the positioning tube 4, the outer surface of the hollow insert 5 is slidably connected to the inside of the insertion hole, the end face of the hollow insert 5 is conical, the end face of the positioning tube 4 is conical, a positioning block 6 is integrally connected to the top of the fixing rod 1, and the end of the positioning block 6 away from the fixing rod 1 is pointed;

[0023] The surface of the positioning block 6 abuts against the glenoid grinding template 7. The surface of the glenoid grinding template 7 has a positioning hole 71. A connecting rod 8 is fixedly connected to the surface of the glenoid grinding template 7. A handle 9 is fixedly connected to the end of the connecting rod 8 away from the glenoid grinding template 7. The surface of the glenoid grinding template 7 abuts against the glenoid prosthesis 10. Two ropes 11 are fixedly connected to the surface of the glenoid prosthesis 10. The diameter of the hollow insert 5 is slightly larger than the diameter of the rope 11. The diameter of the hollow opening inside the hollow insert 5 is two millimeters. The outer surface of the rope 11 is movably fitted with a wire. The device 12, by setting up a clip 3 and a positioning tube 4, allows the surface of the glenoid grinding template 7 to be tightly attached to the bone bed. After the surface of the positioning block 6 is pressed against the inside of the positioning hole 71, the hollow insert 5 is inserted into the positioning tube 4, which can quickly and accurately drill into the bone tunnel of the specified diameter. Then, after the PDS suture is inserted and the suture guide is tightened, the glenoid prosthesis 10 can be tightly attached to the precisely processed bone surface of the glenoid, realizing personalized reconstruction of glenoid bone defects. Due to the precision and efficiency of the operation, it can reduce damage to tissues, promote postoperative recovery, and shorten the patient's recovery time.

[0024] The surface of the positioning block 6 rests against the inside of the positioning hole 71. There are two positioning holes 71. By setting two positioning holes 71, after the positioning block 6 rests against the inside of the positioning hole 71, two independent bone tunnels can be drilled, which helps to avoid drilling position deviation and ensures the correct positioning of the tunnel in the scapular bone defect area.

[0025] During the surgery, the patient is first anesthetized, and then placed on their side with the affected limb pulled and the area disinfected and draped. Then, posterior, anterior, and superior approaches were established. The superior approach was used for observation, while the anterior approach allowed for separation of the labrum soft tissue and treatment of the bone surface. The glenoid grinding template 7 was repeatedly tested and verified until it could be placed tightly against the bone bed and flush with the articular surface. Then, a locator consisting of a fixation rod 1, handle 2, clip 3, positioning tube 4, and hollow rod 5 was placed from the posterior approach. Two 2mm diameter bone tunnels were drilled through the hollow rod 5. At this point, the glenoid grinding template 7 was removed, and a PDS suture was fed from posterior to anterior through a suture guide and pulled out from the anterior approach. The pulled-out PDS suture was tied together with rope 11 and pulled into the joint cavity so that the surface of the glenoid prosthesis 10 was tightly against the glenoid. A small steel plate was used for posterior suspension and fixation. The incision was closed, and the operation was completed, achieving personalized reconstruction of the glenoid bone defect. Due to the precision and efficiency of the operation, damage to tissues can be reduced, postoperative recovery can be promoted, and the patient's recovery time can be shortened.

[0026] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A set of tools for a personalized reconstruction prosthesis for glenoid bone defects, comprising a fixation rod (1), characterized in that: A handle (2) is fixedly connected to the surface of the fixed rod (1). A sleeve (3) is fixedly connected to the surface of the fixed rod (1) away from the handle (2). A positioning tube (4) is snapped into the inside of the sleeve (3). A hollow rod (5) is movably inserted into the inside of the positioning tube (4). The end face of the hollow rod (5) is conical. The end face of the positioning tube (4) is conical. A positioning block (6) is integrally connected to the top of the fixed rod (1).

2. The supporting tools for a personalized reconstruction prosthesis for glenoid bone defects according to claim 1, characterized in that: The surface of the positioning block (6) abuts against the glenoid grinding template (7). The surface of the glenoid grinding template (7) is provided with a positioning hole (71). A connecting rod (8) is fixedly connected to the surface of the glenoid grinding template (7). A handle (9) is fixedly connected to the end of the connecting rod (8) away from the glenoid grinding template (7). The surface of the glenoid grinding template (7) abuts against the glenoid prosthesis (10). A rope (11) is fixedly connected to the surface of the glenoid prosthesis (10). A threader (12) is movably sleeved on the outer surface of the rope (11).

3. The supporting tools for a personalized reconstruction prosthesis for glenoid bone defects according to claim 1, characterized in that: The sleeve (3) is C-shaped, and the inner wall of the sleeve (3) abuts against the outer surface of the positioning tube (4).

4. The supporting tools for a personalized reconstruction prosthesis for glenoid bone defects according to claim 1, characterized in that: The positioning tube (4) has an insertion hole at its center that matches the hollow plug (5), and the outer surface of the hollow plug (5) is slidably connected to the inside of the insertion hole.

5. The supporting tools for a personalized reconstruction prosthesis for glenoid bone defects according to claim 2, characterized in that: The end of the positioning block (6) away from the fixing rod (1) is pointed, and the surface of the positioning block (6) abuts against the inside of the positioning hole (71). There are two positioning holes (71).

6. The accessory tool for a personalized reconstruction prosthesis for glenoid bone defects according to claim 2, characterized in that: The number of ropes (11) is two, the diameter of the hollow insert (5) is slightly larger than the diameter of the ropes (11), the diameter of the hollow insert (5) is two millimeters, and the glenoid prosthesis (10) is made by 3D printing.

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