Quick assembly shoulder prosthesis

Abstract

This utility model provides a quick-assembly glenoid prosthesis, relating to the field of medical device technology. Its key technical features include a base and a glenoid head, as well as a connector and a locking device. The base includes a base plate and a limiting post. In the initial state, the connector and the locking device are assembled with the glenoid head. The glenoid head is hemispherical with a groove at its bottom and a through hole at its top, communicating with the groove. The connector is fixed within the groove, and the locking device passes through the connector. After installation, the base plate abuts against the bottom of the groove, and the locking device is inserted into the limiting post. The design of the connector and locking device allows the glenoid head to be accurately and quickly assembled with the glenoid base in a confined surgical space, reducing surgical time and lowering the incidence of postoperative complications.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a quick-assembly shoulder prosthesis. Background Technology

[0002] Artificial shoulder joint replacement surgery is an effective treatment for severe shoulder joint diseases. However, most of the inverted shoulder joint prosthesis systems currently widely used in clinical practice are designed by European and American companies based on shoulder joint anatomical data of Western populations, and have poor compatibility with the bony anatomy of the shoulder joint in the Chinese population.

[0003] The inverted shoulder joint prosthesis system mainly consists of a humeral prosthesis system and a glenoid prosthesis system. Traditional glenoid prosthesis systems on the market have revealed several problems in clinical application over the past decade: ① The glenoid head and glenoid base are usually designed with a tapered fit, but the surgical operating space exposed during surgery is extremely limited, making installation inconvenient and prolonging the operation time. ② The tapered fit between the glenoid head and glenoid base is difficult to confirm, and improper installation can lead to serious postoperative complications. ③ In addition, the outer diameter of the glenoid base is designed to be too large, resulting in poor compatibility with the glenoid size of the Chinese population. Utility Model Content

[0004] The purpose of this application is to solve the technical problems of prioritizing surgical operating space and the inconvenience of tapered connection and installation in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A quick-assembly girdle prosthesis includes a base and a girdle head, as well as a connector and a locking device. The base includes a base and a limiting post. In the initial state, the connector and the locking device are assembled with the girdle head. The girdle head is hemispherical with a groove at its bottom and a through hole at its top. The through hole communicates with the groove. The connector is fixed in the groove, and the locking device passes through the connector. After installation, the base abuts against the bottom of the groove, and the locking device is inserted into the limiting post.

[0007] Preferably, the base is circular in shape, with straight edges at both ends in the width direction and arc-shaped edges at both ends in the length direction, and the limiting post is cylindrical in shape.

[0008] Preferably, the limiting post has a through hole at its center, and the base has a locking hole for the locking device to pass through. The locking hole is connected to the through hole.

[0009] Preferably, the locking hole is larger than the through hole. The locking device includes a rotating part, a through part, and a limiting part. The through part is cylindrical and passes through the connector, the locking hole, and the through hole. The limiting part is located on the outer periphery of the through part and is annular. The bottom of the limiting part abuts against the stepped part where the through hole and the locking hole are connected.

[0010] Preferably, the groove is provided with an internal thread, the connector is circular, and the outer periphery of the connector is provided with an external thread that matches the internal thread.

[0011] Preferably, a positioning hole is provided at the center of the connector for the locking device to pass through and be positioned, and a relief portion is formed by recessing the upper part of the base for the locking device to make way for the rotating part of the locking device.

[0012] Preferably, the bottom of the groove and the base are tapered to match each other.

[0013] Compared with the prior art, this application has the following beneficial effects:

[0014] The connector and locking mechanism design allows the glenoid head to be accurately and quickly assembled with the glenoid base in confined surgical spaces, reducing surgical time and the incidence of postoperative complications. Applying the utility model patented "Novel Rapidly Assembled Glenoid Prosthesis System" from this study to total shoulder joint replacement surgery, the optimized dimensions and novel structural design facilitate installation and operation by surgeons in confined surgical spaces, reducing surgical time and the incidence of postoperative pain and other complications. This shortens hospital stays, improves patient comfort and satisfaction, reduces treatment costs, enhances public well-being, and improves product quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a quick-assembly shoulder prosthesis according to one embodiment of the present invention;

[0016] Figure 2 This is a cross-sectional schematic diagram of a quick-assembly shoulder prosthesis according to one embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the base of a quick-assembly shoulder prosthesis according to one embodiment of the present invention;

[0018] Figure 4 This is a cross-sectional schematic diagram of the base of a quick-assembly shoulder prosthesis according to one embodiment of the present invention;

[0019] Figure 5This is a cross-sectional schematic diagram of the shoulder girdle head, connector, and locking device in a quick-assembly shoulder girdle prosthesis according to one embodiment of the present invention.

[0020] Legend:

[0021] 1. Base; 11. Base; 111. Locking hole; 112. Fixing hole; 1121. Threaded hole; 1122. Nut hole; 1123. Screw; 1124. Nut; 12. Limiting post; 121. Through hole; 2. Shoulder head; 21. Groove; 22. Through hole; 3. Connector; 31. Positioning hole; 32. Clearance part; 4. Locking device; 41. Rotating part; 42. Through part; 43. Limiting part. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to specific embodiments.

[0023] Please see Figure 1 and Figure 2 A quick-assembly glenoid prosthesis includes a base 1, a glenoid head 2, a connector 3, and a locking device 4. The base 1 is used to connect and fix to the human skeleton, and the connector 3 and the locking device 4 are used to connect and fix the glenoid head 2 to the base 1. In one embodiment, in the initial state, the glenoid head 2, the connector 3, and the locking device 4 are assembled together.

[0024] Please see Figure 3 and Figure 4In one embodiment, the base 1 includes a base 11 and a limiting post 12. The base 11 is approximately circular. Specifically, the two ends of the base 11 in the width direction are straight edges, and the two ends of the base 11 in the length direction are arc-shaped. The diameter of the two arc-shaped sides is 24-26 mm, and the diameter of the straight edges is 18-22 mm. The base 11 is tapered. The limiting post 12 is located at the larger end of the base 11. The limiting post 12 is cylindrical. The diameter of the limiting post 12 is 7-9 mm, and the height of the limiting post 12 is 5-30 mm. A through hole 121 is provided in the center of the limiting post 12. The diameter of the through hole 121 is 5-6 mm. A locking hole 111 is provided inside the base 11. The locking hole 111 is used for the locking device 4 to pass through. The locking hole 111 communicates with the through hole 121, and the size of the locking hole 111 is larger than that of the through hole 121. To fix the base 11, two fixing holes 112 are provided on the base 11, and the limiting post 12 is located at the midpoint of the line connecting the two fixing holes 112. The fixing hole 112 includes a threaded hole 1121 and a nut hole 1122, wherein the threaded hole 1121 and the nut hole 1122 are connected. The threaded hole 1121 is located on the side of the base 11 with a larger area. A screw 1123 is threaded through the threaded hole 1121, and a nut 1124 is provided in the nut hole 1122. The screw 1123 is threaded and fixed in the threaded hole 1121. The outer periphery of the end of the screw 1123 is provided with an external thread, and the nut 1124 is provided with an internal thread pointing towards the screw. The screw 1123 is fixed in the threaded hole 1121 by rotating and fixing it on the screw 1123.

[0025] Please see Figure 1 and Figure 2 The shoulder head 2 is hemispherical, and a groove 21 is provided at the bottom of the shoulder head 2. The outer diameter of the shoulder head 2 is 36-42mm, and the diameter of the groove 21 is 20-30mm.

[0026] A through hole 22 is provided at the top of the shoulder head 2, and the through hole 22 is connected to the groove 21.

[0027] An internal thread is provided on the inner wall of the groove 21, which is used to adapt to the connector 3; the bottom of the groove 21 is tapered, specifically, the bottom of the groove 21 is connected to the tapered part of the base 1, and the tapered part allows the groove 21 to abut against and limit the base 1.

[0028] Please see Figure 5The connector 3 is circular and has an external thread on its outer periphery. The external thread is used to abut against the internal thread on the inner wall of the groove 21. A positioning hole 31 is provided at the center of the connector 3. The positioning hole 31 is used for the locking device 4 to pass through and be positioned. A relief part 32 is formed by recessing the upper part of the base 11. The relief part 32 is used to allow space for the top of the locking device 4.

[0029] Please see Figure 5 The locking device 4 includes a rotating part 41, a through part 42, and a limiting part 43, all of which are integrally formed. The through part 42 is cylindrical and passes through the connector 3, the locking hole 111, and the through hole 121. The bottom of the through part 42 is spherical. The rotating part 41 is located at the top of the through part 42 and drives the through part 42 to rotate. The limiting part 43 is located on the outer periphery of the through part 42 and is annular. The bottom of the limiting part 43 abuts against the stepped portion where the through hole 121 connects to the locking hole 111, thus limiting the relative position between the connector 3 and the base 11. In one embodiment, the outer periphery of the limiting part 43 is provided with an external thread, and the locking hole 111 is provided with an internal thread. The limiting part 43 and the internal and external threads in the locking hole 111 are matched with each other so that the locking device 4 and the base 11 can be stably connected.

[0030] Operating principle:

[0031] First, a surgical approach is selected, and the exposed area of ​​the shoulder joint is expanded to prepare the joint for prosthesis placement;

[0032] First, the base 1 is implanted and fixed with screws 1123 and nuts 1124. The glenoid head 2 is then inserted through the central through hole 121 of the base 1. In the initial state, the glenoid head 2 is already equipped with connector 3 and locking device 4. After inserting the glenoid head 2, an Allen wrench is used to tighten the locking device 4 through the through hole 22. The humeral side surgery is then completed.

[0033] This application provides a rapid-assembly glenoid prosthesis. Through the design of the connector 3 and locking device 4, the glenoid head 2 can be accurately and quickly assembled with the glenoid base 1 in a confined surgical space, reducing surgical time and the incidence of postoperative complications. Applying this "novel rapid-assembly glenoid prosthesis system" to total shoulder joint replacement surgery, the optimized dimensions and novel structural design facilitate installation and operation by surgeons in confined surgical spaces, reducing surgical time, alleviating postoperative pain and other complications, thereby shortening hospital stays, improving patient comfort and satisfaction, reducing treatment costs, enhancing public well-being, and improving product quality.

Claims

1. A quick-assembly type axel prosthesis, comprising a base and axel head, characterized in that: It also includes a connector and a locking device. The base includes a base and a limiting post. In the initial state, the connector and the locking device are assembled with the shoulder head. The shoulder head is hemispherical with a groove at its bottom and a through hole at its top. The through hole communicates with the groove. The connector is fixed in the groove and the locking device passes through the connector. After installation, the base abuts against the bottom of the groove and the locking device is inserted into the limiting post.

2. The quick-assembly glenoid prosthesis according to claim 1, characterized in that: The base is roughly circular, with straight edges at both ends in the width direction and arcs at both ends in the length direction, and the limiting post is cylindrical.

3. The quick-assembly glenoid prosthesis according to claim 2, characterized in that: The limiting post has a through hole at its center, and the base has a locking hole inside. The locking hole is for the locking device to pass through, and the locking hole is connected to the through hole.

4. The quick-assembly glenoid prosthesis according to claim 3, characterized in that: The locking hole is larger than the through hole. The locking device includes a rotating part, a through part, and a limiting part. The through part is cylindrical and passes through the connector, the locking hole, and the through hole. The limiting part is located on the outer periphery of the through part and is annular. The bottom of the limiting part abuts against the stepped part where the through hole and the locking hole are connected.

5. The quick-assembly glenoid prosthesis according to claim 4, characterized in that: The groove is provided with an internal thread, the connector is circular, and the outer periphery of the connector is provided with an external thread that matches the internal thread.

6. The quick-assembly glenoid prosthesis according to claim 5, characterized in that: The connector has a positioning hole at its center, which is used for the locking device to pass through and be positioned. The base has a recessed relief portion above it, which is used to allow space for the rotating part of the locking device.

7. The quick-assembly glenoid prosthesis according to claim 6, characterized in that: The bottom of the groove and the base are tapered to match each other.

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