a finger joint prosthesis

Abstract

The invention discloses a finger joint prosthesis. The finger joint prosthesis comprises a finger joint (1) and a palm finger joint (2). The finger joint (1) comprises an enarthrosis head (11) and a finger joint handle (12) which are connected, and the two sides of the end, close to the enarthrosis head (11), of the finger joint handle (12) are provided with protruding first longitudinal ribs (13). The palm finger joint (2) comprises an enarthrosis head (21) and a palm finger joint handle (22) which are connected, and the two sides of the end, close to the enarthrosis head (21), of the palm finger joint handle (22) are provided with protruding second longitudinal ribs (23). The second longitudinal ribs (23) and the first longitudinal ribs (13) can be embedded into the body of a patient so that the palm finger joint (2) and the finger joint (1) can be prevented from rotating in the body of the patient. The surface roughness of the finger joint prosthesis is enhanced, bone ingrowth is facilitated so that the service life of the prosthesis can be prolonged, prosthesis implantation is stable, an operation is convenient, the handle shape is favorable for finger joint blood supply, and the longitudinal ribs are arranged so that rotation resistance can be facilitated and implantation can be convenient.

Description

technical field [0001] The invention relates to a medical prosthesis, in particular to a finger joint prosthesis. Background technique [0002] Such as figure 1 As shown, the existing knuckle prosthesis is an integral silicone rubber body. One of the purposes of implantation surgery is to reduce the generation of wear particles, but the phenomenon of wear particles cannot be eliminated, because all movements Parts (for example: implants in contact with bone) will undergo a certain degree of wear, and clinically visible severe wear will occur under normal biomechanical external forces, and non-normal or excessive external forces will further increase the wear. degree. [0003] It can be seen that the above-mentioned existing knuckle prosthesis obviously still has inconvenience and defects in structure and use, and needs to be further improved urgently. How to develop a new knuckle structure, which is stable and convenient for prosthesis implantation. It is one of the curre...

AI Technical Summary

Problems solved by technology

[0002] like figure 1 As shown, the existing knuckle prosthesis is an integral silicone rubber body. One of the purposes of implantation surgery is to reduce the generation of wear particles, but the phenomenon of wear particles cannot be eliminated, because all movements Parts (for example: implants in contact with bone) will undergo a certain degree of wear, and clinically visible severe wear will occur under normal biomechanical external forces, and non-normal or excessive external forces will further increase the wear. degree

[0003] It can be seen that the above-mentioned existing knuckle prosthesis obviously still has inconvenience and defects in structure and use, and needs to be further improved urgently. How to develop a new knuckle structure, which is stable and convenient for prosthesis implantation. A knuckle prosthesis with a new structure that facilitates the blood supply to the knuckles and effectively resists rotation is one of the current important research topics in this field.

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