CN2440467Y

CN2440467Y - Artificial joint

Info

Publication number: CN2440467Y
Application number: CN 00257840
Authority: CN
Inventors: 胡溱
Original assignee: TRAUMA ORTHOPAEDICS INST BEJING
Current assignee: TRAUMA ORTHOPAEDICS INST BEJING
Priority date: 2000-10-16
Filing date: 2000-10-16
Publication date: 2001-08-01
Anticipated expiration: 2010-10-16

Abstract

The utility model discloses an artificial joint. A joint body is a rectangular sheet with a bow-shaped structure; the internal arc surface of the bow-shaped sheet is provided with pins; the surface of the bow back is divided into two convex circular arc surfaces through a groove on the bow back; a joint contact disk is matched with the convex circular arc surfaces in a corresponding mode; the disk surface is provided with two concave arc surfaces which are suitable for the convex circular arc surfaces of the body; the back of the contact disk is provided with the pins; through respectively making use of the pins, the artificial joint body and the contact disk are implanted into bone bodies on both sides of broken joints of hand portions, and after soft tissues grow well, the joints of the hand portions can restore stretching and bending degree through making use of drawing of nerves of the hands and ligaments. The utility model which can cause the postoperative joints to have increased stability has the advantages of reinforced stretching and bending functions, simple structure, and long service life.

Description

A kind of artificial joint

This utility model relates to the medical human field of prosthetic limbs, relates in particular to a kind of artificial joint that is used for the hand limbs.

As everyone knows, hands is the important work organ on the human body, life is still worked and is all be unable to do without hands, and because of the injured extremely residual great majority that account for human industrial injury of hands, therefore solve the joint motion of hindering hands, so that recover its partial function will be the important topic of medical science hands surgery research, recover the function of bending and stretching of joints of hand for the joint injury that solves hands, abroad from development eighties hand joint replacement, the hinge type artificial joint is inserted the hand joint, so that replace the former tough joint of damage, recover the function of bending and stretching of joints of hand, but because the hinge type joint is made complicated, volume is bigger, cause the destruction of periarticular tendon stop and ligament easily, form the artificial joint instability after replacing, so that lose the mobility of joints of hand, simultaneously because the growth of hand soft tissue of joint, time one is long, also very easily makes hinge place, joint be subjected to blocking and hinders its activity, influences joints of hand degree of bending and stretching.

The purpose of this utility model provides and a kind ofly can make the joint after the displacement stable, and it is good and simple in structure to bend and stretch performance, the artificial joint of long service life.

In order to achieve the above object, this utility model adopts following structure, the artificial joint that comprises the joint motion body, its characteristics are: the joint body is the rectangle thin slice of an arching, fixedly connected tapered dowel on the intrados of arciform thin slice, back of a bow middle part at arc thin slice is provided with a concave through grooves, back of a bow table is divided into two square protruding cambered surfaces, what corresponding contact with protruding cambered surface cooperated is a joint contact dish, have two spill cambered surfaces on the contact disc mating surface, the convex-shaped arc surface of spill cambered surface and body adapts.At the back side of contact disc fixed installation tapered dowel.

Utilize the tapered dowel on Movable joint main body and the supporting contact disc during use, respectively main body and contact disc are implanted in the diaphysis of the both sides, hand joint that disconnect, the ligament of wound and the soft tissue of growth with the artificial joint envelope tight after, just in the joints of hand limbs, formed mobilizable artificial joint, utilize the pulling of hands nerve and ligament, make injured hand joint recover its degree of bending and stretching.

Because this utility model has adopted the structure of the movable artificial joint of above-mentioned contact-type, meet hand joint physiological feature more in the implantation diaphysis, make that artificial joint stability improves, and bends and stretches increased functionality, and simple in structure, long service life after the kan setsu waza.

Below in conjunction with accompanying drawing in detail this utility model is described in detail.

Fig. 1 is this utility model structural representation.

Fig. 2 is the movable body construction sketch map of this utility model.

Fig. 3 is the left view of Fig. 2.

Fig. 4 is this utility model contact disc structural representation.

Fig. 5 is the right view of Fig. 4.

Can find out from Fig. 1 to Fig. 5, this utility model comprises joint motion body 1 and contact disc 2, body 1 is a rectangle rustless steel thin slice hunch, the rustless steel pin 3 of a band point of welding in the middle of the intrados of arciform thin slice, be pressed with a groove 4 at the middle part of the back of a bow, with hunchbacked surface segmentation is two quadrate protruding cambered surfaces, what contact cooperation with the body convex-shaped arc surface is a joint contact dish 2, it is quadrate concavity arc surface 5 that two bottom surfaces are arranged on the contact disc mating surface, concavity arc surface 5 adapts with the convex shaped arc face of body 1, at rustless steel tapered dowel 6 of middle part, back side welding of contact disc 2.

Claims

1. an artificial joint comprises the joint motion body, it is characterized in that: the joint body is the rectangle thin slice of an arching, fixedly connected tapered dowel on the intrados of arciform thin slice, back of a bow middle part at arc thin slice is provided with a concave through grooves, back of a bow table is divided into two square protruding cambered surfaces, what corresponding contact with protruding cambered surface cooperated is a joint contact dish, has two spill cambered surfaces on the contact disc mating surface, and the convex-shaped arc surface of spill cambered surface and body adapts.At the back side of contact disc fixed installation tapered dowel.