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Novel wrist joint prosthesis

A wrist joint prosthesis and wrist joint technology, applied in the field of medical prostheses, can solve the problems of complex structure, inconvenient installation, unadjustable fastening force, etc., and achieve the effects of improving surgical efficiency, strengthening friction, and convenient installation.

Pending Publication Date: 2021-10-01
BEIJING CHUNLIZHENGDA MEDICAL INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the prior art still has the following defects: (1) the structure is complicated, the installation is inconvenient, and the treatment effect is not good; (2) the fastening force of the prosthesis in the medullary cavity cannot be guaranteed, and the fastening force cannot be adjusted

Method used

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  • Novel wrist joint prosthesis
  • Novel wrist joint prosthesis
  • Novel wrist joint prosthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Please refer to the attached Figure 1-4 , the purpose of this embodiment is to provide a new type of wrist prosthesis, including: wrist joint medullary needle 1, fastening screw 2, spherical spacer 3 and radial medullary needle 4; wherein, radial medullary needle 4 and spherical The spacer 3 is slidingly connected, preferably, the radial medullary needle 4 is connected with the spherical spacer 3 through a slider; the wrist joint medullary needle 1 is fixedly connected with the spherical spacer 3 .

[0029] Specifically, the end surface of the spherical pad 3 is provided with a square protruding buckle 31, the end surface of the wrist joint medullary needle 1 is provided with a square hole inwardly, and the wrist joint medullar needle internal thread 13 is provided inwardly along the square hole, The protruding buckle 31 engages with the square hole. Preferably, a square hole buckle is provided inside the square hole, and the square hole buckle engages with the protrud...

Embodiment 2

[0033] Please refer to the attached Figure 1-4 , the purpose of this embodiment is to provide a new type of wrist prosthesis, including: wrist joint medullary needle 1, fastening screw 2, spherical spacer 3 and radial medullary needle 4; wherein, radial medullary needle 4 and spherical The spacer 3 is slidingly connected, preferably, the radial medullary needle 4 is connected with the spherical spacer 3 through a slider; the wrist joint medullary needle 1 is fixedly connected with the spherical spacer 3 .

[0034] Specifically, a square protruding buckle 31 is provided on the end surface of the spherical spacer 3, a square hole is provided on the end surface of the wrist joint medullary needle 1, and an internal thread 13 of the wrist joint medullary needle is provided inwardly along the square hole. The protruding buckle 31 engages with the square hole. Preferably, a square hole buckle is provided inside the square hole, and the square hole buckle engages with the protruding...

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Abstract

The invention relates to the technical field of medical prostheses, and provides a novel wrist joint prosthesis, which comprises a wrist joint broach, a fastening screw, a spherical cushion block and a radial broach, wherein the radial broach is in sliding connection with the spherical cushion block, and the wrist joint broach is fixedly connected with the spherical cushion block; a square protruding buckle is arranged on the end face of the spherical cushion block, a square hole is formed in the end face of the wrist joint broach inwards, a wrist joint broach internal thread is arranged inwards along the square hole, the protruding buckle is clamped with the square hole, and the fastening screw is screwed with the wrist joint broach internal thread. The novel wrist joint prosthesis has the advantages that the spherical cushion block and the wrist joint broach are clamped through the buckle structure, meanwhile, the fastening screw is screwed with the internal thread of the wrist joint broach and the internal thread of the protruding buckle, installation is convenient, connection is reliable, rotation and disengagement can be effectively prevented, and the operation efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of medical prosthesis, in particular to a novel wrist joint prosthesis. Background technique [0002] The wrist joint is one of the most flexible and important joints in the human body. For the treatment of traumatic, degenerative wrist arthritis, severely damaged rheumatoid arthritis and other diseases, most of the previous treatments were based on wrist fusion. Mainly, with the development of medicine and technology and patients' eagerness to relieve pain while retaining the function of their wrist joints, total wrist joint replacement is more and more applied to wrist joint treatment. [0003] Chinese patent CN112294500A discloses a wrist prosthesis, which includes: a carpal prosthesis and a radial prosthesis; the carpal prosthesis has a first curved surface, and the radial prosthesis has a shape suitable for the first curved surface The second curved surface is matched, the carpal prosthesis and the rad...

Claims

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Application Information

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IPC IPC(8): A61F2/42
CPCA61F2/4261A61F2/30749A61F2002/4264A61F2002/30733
Inventor 许奎雪任宏志刘曙光康树靖史春生史春宝刘雅卿孙涛舰
Owner BEIJING CHUNLIZHENGDA MEDICAL INSTR