Artificial implant for carpometacarpal joint

Abstract

The invention discloses an artificial implant for the carpometacarpal joint. The artificial implant is used for arthroplasty of the carpometacarpal joint surface of the first metacarpal bone and comprises an insert portion, an arthroplasty portion and an attached flange. The insert portion is provided with an insert end and a front end, the insert end is inserted into a marrow cavity exposed in an incision of the first metacarpal bone. The arthroplasty portion is connected to the front end of the insert portion and arranged outside the incision of the first metacarpal bone and is provided with a joint profile surface so as to substitute for the carpometacarpal joint surface of the first metacarpal bone. The attached flange is convexly arranged at a rim of the arthroplasty portion and used for flatly attaching to an exoskeleton surface of the incision adjacent to the first metacarpal bone. Besides, the attached flange is provided with at least one suture through hole for at least one suture to pass, so that abductor pollicis longus can be assisted in being fixed to the surface of the exoskeleton.

Description

technical field [0001] The invention relates to an artificial joint implant, in particular to an artificial implant of the thumb carpal metacarpal joint which is convenient for using surgical sutures. Background technique [0002] Osteoarthritis is a disease that affects the joints. Osteoarthritis occurs when the cartilage in the joints becomes damaged or worn away, causing stiffness, pain and loss of function in the affected joints. Osteoarthritis most commonly occurs in the hip, knee, spine and hand joints (such as the joints of the palm and thumb). Among them, thumb carpometacarpal joint (CMC) arthritis is one of the most important issues in degenerative arthritis of upper limbs. The thumb carpal metacarpal joint (CMC) is located anatomically at the base of the thumb, distal to the first metacarpal bone and proximal to the trapezium on the radius side. The thumb carpal metacarpal joint (CMC) can extend, adduct, abduct and rotate, and is the joint with the largest amount...

AI Technical Summary

Problems solved by technology

In addition, the reserved surgical sutures are often pushed into the bone marrow cavity by the artificial joint implants when the artificial joint implant is implanted into the bone marrow cavity, resulting in displacement of the surgical sutures, making it difficult to locate accurately, and Or, the reserved surgical sutures are destroyed during the implantation of the prosthetic joint, thus increasing the difficulty of reconstruction of the abductor thumb longus tendon attachment

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