Reverse shoulder joint prosthesis with limited time period

Abstract

The invention discloses a time period limiting type reverse shoulder joint prosthesis, and relates to the field of joint prostheses, the time period limiting type reverse shoulder joint prosthesis comprises a humerus base, a spacer is installed at the top end of the humerus base, a polyethylene lining is installed at the top of the spacer, and a shoulder glenoid ball is attached to the end face of one side of the polyethylene lining; the end face of one side of the shoulder glenoid ball is in threaded connection with a shoulder glenoid base, a shoulder glenoid opening is formed in the inner side of the shoulder glenoid ball, an absorbable suture line penetrates through the inner side of the shoulder glenoid opening, a humerus base opening is formed in the inner side of the humerus base in a penetrating mode, and the absorbable suture line penetrates through the shoulder glenoid opening and the humerus base opening and is fixed in the shoulder glenoid opening and the humerus base opening. In the early stage of prosthesis implantation, the shoulder joint is limited, so that the shoulder joint becomes a restrictive prosthesis temporarily, it is guaranteed that the joint cannot be dislocated, and the absorbable suture can be absorbed within about 56-78 days in the post-operation process of a patient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of joint prosthesis, in particular to a time period limiting reverse shoulder joint prosthesis. BACKGROUND

[0002] Artificial joint replacement is widely used in the surgical treatment of various orthopedic diseases, including hip, knee, ankle, shoulder, elbow and other joints. Artificial joints can be divided into restrictive and non-restrictive. Restrictive artificial joints refer to artificial joint prosthesis structures with a stabilizing mechanism to prevent joint dislocation, such as artificial joints with hinge devices. Non-restrictive artificial joints refer to prostheses without a stabilizing mechanism, and their joint stability relies on the surrounding soft tissues to maintain. Generally speaking, restrictive artificial joints are not prone to dislocation, but can cause decreased joint mobility and increased prosthesis-bone interface stress. Non-restrictive artificial joints are prone to dislocation, especially in the early postoperative period, but have better postoperative function. Reverse shoulder joint is a special shoulder joint that changes the mechanical structure of the human shoulder joint and is more conducive to improving shoulder joint mobility. It requires a certain stability after surgery and high flexibility after rehabilitation. However, the existing joint prosthesis cannot simultaneously achieve the advantages of both restrictive and non-restrictive artificial joints, resulting in dislocation complications in reverse shoulder joints after surgery, difficulty in improving joint mobility, and the need for secondary surgery, which causes distress to patients. In order to avoid the above technical problems, it is necessary to provide a time period limiting reverse shoulder joint prosthesis to overcome the defects in the prior art. SUMMARY

[0003] The present application provides a time period limiting reverse shoulder joint prosthesis, which can effectively solve the problem of the existing joint prosthesis in the background art, which cannot simultaneously achieve the advantages of both restrictive and non-restrictive artificial joints, resulting in dislocation complications in reverse shoulder joints after surgery, difficulty in improving joint mobility, and the need for secondary surgery, which causes distress to patients.

[0004] To achieve the above purpose, the present application provides the following technical scheme: a time period limiting reverse shoulder joint prosthesis, comprising a humeral base, a stabilizing assembly is installed on the top of the humeral base; The stabilizing assembly comprises a spacer, a reverse shoulder humeral stem, a connecting piece, an intramedullary fixation needle, a glenosphere, a glenoid base, a glenoid opening, a CNC anti-cutting angle, an absorbable suture, a humeral base opening and a polyethylene lining. The top end of the humeral base is provided with a spacer, the bottom end of the spacer is provided with a reverse shoulder humeral stem, the bottom end of the reverse shoulder humeral stem is provided with a connecting piece, and the bottom end of the connecting piece is connected with an intramedullary fixation needle. The top of the spacer is provided with a polyethylene lining, one side end face of the polyethylene lining is attached with a glenosphere, one side end face of the glenosphere is threadedly connected with a glenosphere base, the inner side of the glenosphere is provided with a glenosphere opening, the inner side of the glenosphere opening is provided with a CNC anti-cutting corner at the corresponding position of the one side end face of the glenosphere, the inner side of the glenosphere opening is inserted with absorbable sutures, and the inner side of the humeral base is provided with a humeral base opening.

[0005] Preferably, one side end face of the glenosphere is provided with a base fixing groove, and the glenosphere base is installed on the inner side of the glenosphere through the base fixing groove.

[0006] Preferably, the glenosphere opening is provided with three, and the three glenosphere openings are equiangularly arranged at the inner side edge position of the glenosphere.

[0007] Preferably, the humeral base opening is provided with three, and the three humeral base openings are equiangularly arranged on the inner side of the humeral base, and each humeral base opening is arranged at the corresponding position of the glenosphere opening.

[0008] Preferably, one side end face of the glenosphere base is provided with a plurality of fixing screws, and the absorbable sutures pass through the glenosphere opening and the humeral base opening at the same time.

[0009] Compared with the prior art, the beneficial effects of the present application are as follows: in the early stage of prosthesis implantation, the shoulder joint is limited, so that it temporarily becomes a restrictive prosthesis, and the joint cannot be dislocated, and in the process of about 56-78 days after the patient is operated, the absorbable sutures are absorbed, so that the fixation between the glenosphere opening, the humeral base opening and the absorbable sutures is released, so that the shoulder joint prosthesis becomes a non-restrictive prosthesis again, thereby ensuring the flexibility of the shoulder joint, and the patient has a better postoperative life, the polyethylene lining can reduce friction damage when used, and the CNC anti-cutting corner can prevent the absorbable sutures from being cut and damaged, and ensure that the prosthesis is a restrictive prosthesis in the early stage after operation. BRIEF DESCRIPTION OF DRAWINGS

[0010] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application.

[0011] In the drawings: Fig. 1 is a structural schematic diagram of the present application; Fig. 2 is a structural schematic diagram of the stable assembly of the present application; Fig. 3 is a mounting structural schematic diagram of the polyethylene lining of the present application; Mark 1 in the figure: humeral base; 2. Stabilizing components; 201. Spacer; 202. Reverse humeral stem; 203. Connector; 204. Intramedullary fixation pin; 205. Glenoid bulb; 206. Glenoid base; 207. Glenoid opening; 208. CNC cut-resistant bevel; 209. Absorbable suture; 210. Humeral base opening; 211. Polyethylene liner; Detailed Implementation

[0012] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0013] Example: Figs. 1-3 As shown, the present invention provides a technical solution, a time-limited reverse shoulder joint prosthesis, with humeral base 1 Stabilizing component 2 spacer 201 reverse shoulder humeral stem 202 connector 203 intramedullary fixation pin 204 glenoid ball 205 glenoid base 206 glenoid opening 207 CNC cutting angle 208 absorbable suture 209 humeral base opening 210 polyethylene liner 211.

[0014] Includes a humeral base 1, with a stabilizing component 2 mounted on top of the humeral base 1; The stabilizing component 2 includes a spacer 201, a reverse humeral stem 202, a connector 203, an intramedullary fixation pin 204, a glenoid bulb 205, a glenoid base 206, a glenoid opening 207, a CNC cut-resistant angle 208, an absorbable suture 209, a humeral base opening 210, and a polyethylene liner 211. A spacer 201 is installed at the top of the humeral base 1, a reverse humeral stem 202 is installed at the bottom of the spacer 201, a connector 203 is installed at the bottom of the reverse humeral stem 202, and an intramedullary fixation pin 204 is connected to the bottom of the connector 203. The top of the spacer 201 is provided with a polyethylene lining 211, one side end face of the polyethylene lining 211 is attached with a glenosphere 205, one side end face of the glenosphere 205 is threadedly connected with a glenosphere base 206, one side end face of the glenosphere 205 is provided with a base fixing groove, the glenosphere base 206 is installed in the inner side of the glenosphere 205 through the base fixing groove, which facilitates the fixation of the glenosphere 205, the inner side of the glenosphere 205 is provided with three glenosphere holes 207, the three glenosphere holes 207 are equiangularly arranged at the inner side edge position of the glenosphere 205, which is beneficial to the uniform stress of the glenosphere 205, one side end face of the glenosphere base 206 is provided with a plurality of fixing screws, the absorbable suture 209 can pass through the glenosphere hole 207 and the humeral base hole 210, the glenosphere 205 is provided with a CNC anti-cutting corner 208 at the position corresponding to the glenosphere hole 207, the inner side of the glenosphere hole 207 is inserted with the absorbable suture 209, the inner side of the humeral base 1 is provided with a humeral base hole 210, the humeral base hole 210 is provided with three, the three humeral base holes 210 are equiangularly arranged in the inner side of the humeral base 1, and each humeral base hole 210 is arranged at a position corresponding to the glenosphere hole 207, which facilitates the rapid insertion and knotting of the absorbable suture 209.

[0015] The working principle and use process of the application are as follows: first, the medical staff connects the glenosphere 205 to the human body through the glenosphere base 206, and at the same time, the humeral base 1 is connected to the appropriate humerus of the human body through the intramedullary fixation needle 204 at the bottom, at this time, since the humeral base 1, the spacer 201, the connecting piece 203 and the intramedullary fixation needle 204 are an integral whole, the orientation of the spacer 201 can be adjusted by rotating the intramedullary fixation needle 204 when the intramedullary fixation needle 204 is connected to the appropriate humerus of the human body, and the installation of the glenosphere 205 and the humeral base 1 is completed when the glenosphere 205 is attached to the spacer 201 to the appropriate position. When the glenosphere hole 207 and the humeral base hole 210 on the inner side of the glenosphere 205 are adjusted to all one-to-one corresponding positions, stop adjusting, then the medical staff uses the absorbable suture 209 to pass through the glenosphere hole 207 and then enter the inner side of the humeral base hole 210 at the bottom corresponding thereto, then the two ends of the absorbable suture 209 are knotted and fixed, at this time, the glenosphere 205 can be fixed with the humeral base 1 through the absorbable suture 210. The shoulder joint is limited before the prosthesis is implanted, so that it temporarily becomes a restrictive prosthesis, and the joint cannot be dislocated. The absorbable suture 209 is absorbed about 56-78 days after the patient is operated on, so that the fixation between the glenoid opening 207, the humeral base opening 210 and the absorbable suture 209 is released, so that the shoulder joint prosthesis becomes a non-restrictive prosthesis again, and the flexibility of the shoulder joint is ensured. The patient has a better postoperative life. The polyethylene lining 211 can reduce friction damage when used, and the CNC anti-cutting angle 208 can prevent the absorbable suture 209 from being cut and damaged, so that the prosthesis is a restrictive prosthesis in the early postoperative period.

[0016] Finally, it should be noted that the above is only a preferred example of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A time-limited reverse shoulder joint prosthesis, comprising a humeral base (1), characterized in that: A stabilizing component (2) is mounted on the top of the humeral base (1). The stabilizing component (2) includes a spacer (201), a reverse humeral stem (202), a connector (203), an intramedullary fixation pin (204), a glenoid bulb (205), a glenoid base (206), a glenoid opening (207), a CNC cut-resistant angle (208), absorbable sutures (209), a humeral base opening (210), and a polyethylene liner (211). A spacer (201) is installed at the top of the humeral base (1), a reverse humeral stem (202) is installed at the bottom of the spacer (201), a connector (203) is installed at the bottom of the reverse humeral stem (202), and an intramedullary fixation pin (204) is connected to the bottom of the connector (203). The spacer (201) is fitted with a polyethylene liner (211) on its top. A glenoid bulb (205) is attached to one side of the polyethylene liner (211). A glenoid base (206) is threaded to one side of the glenoid bulb (205). A glenoid opening (207) is provided on the inner side of the glenoid bulb (205). A CNC anti-cutting angle (208) is provided at the position corresponding to the glenoid opening (207) on one side of the glenoid bulb (205). An absorbable suture (209) is inserted through the inner side of the glenoid opening (207). A humeral base opening (210) is provided through the inner side of the humeral base (1).

2. The time-limited reverse shoulder joint prosthesis according to claim 1, characterized in that: A base fixing groove is provided on one end face of the shoulder ball (205), and the shoulder ball base (206) is installed on the inner side of the shoulder ball (205) through the base fixing groove.

3. The time-limited reverse shoulder joint prosthesis according to claim 1, characterized in that: The shoulder girdle opening (207) is provided in three parts, and the three shoulder girdle openings (207) are opened at equal angles on the inner side of the shoulder girdle ball (205).

4. The time-limited reverse shoulder joint prosthesis according to claim 1, characterized in that: The humeral base opening (210) is provided in three parts. The three humeral base openings (210) are opened at equal angles on the inner side of the humeral base (1), and each humeral base opening (210) is opened at a position corresponding to the glenoid opening (207).

5. A time-limited reverse shoulder joint prosthesis according to claim 1, characterized in that: Several fixing screws are installed on one end face of the glenoid base (206), and the absorbable suture (209) passes through both the glenoid opening (207) and the humeral base opening (210).

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