High-flexibility bionic full-finger joint replacement piece

Abstract

The invention discloses a high-flexibility bionic full-finger joint replacement piece. The replacement piece comprises a joint body and an intramedullary connector, and is characterized in that the joint body is divided into a proximal joint body and a distal joint body; the top surface of the joint body is of a joint surface structure, namely the top surfaces of the proximal joint body and the distal joint body are respectively in articulated clearance fit with the working surface of a joint pad; the proximal joint body or the distal joint body is designed according to a human biomechanical and anatomical structure, and are provided with the intramedullary connector at the bottom; and the intramedullary connector is of a split combined vertebral structure. Based on the principle of humanbiomechanics, the bionic full-finger joint replacement piece developed by the invention has better shape-adaptability, and the joint body and the osteotomy surface are combined more firmly. The replacement piece better conforms to the biomechanical structure of a human body, has the advantages of good mechanical fit, low cost and good clinical applicability, and enables a patient to have good postoperative function recovery. Both the initial stability and the long-term stability are obviously improved, and the safe service life is greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of orthopedic instruments, and in particular relates to a high-flexibility bionic full-finger joint replacement part with reasonable structure and convenient assembly. Background technique [0002] In the course of daily production and life, it is unavoidable for people to suffer accidents that cause fractures of the metacarpal bones and phalanges, or due to diseases such as rheumatoids, the movement of the palms and knuckles is limited, and even the normal physiological functions are lost. The best treatment to improve the function of metacarpophalangeal joints is joint replacement with artificial prosthesis. However, replacement with existing prosthesis not only has poor initial stability, but also poor bone ingrowth leading to poor long-term stability. Carrying out long-term follow-up after replacement with the existing prosthesis, the above-mentioned drawbacks are more prominent, so a kind of mature meta...

AI Technical Summary

Problems solved by technology

The reason is that the conformity of the articular surface of the prosthesis is poor, the connection structure of the joint surface is unreasonable, and the stability of the intramedullary part is poor, which leads to the occurrence of the above adverse effects.

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