Rolling-type artificial hip joint

Abstract

The rolling artificial hip joint as one kind of artificial bone joint includes femoral head part, rolling part, prosthesis handle part and circular screw nut. The rolling part consists of two rolling bearings separated with two spacing rings, and the rolling bearings have their inner rings matched with the main shaft of the prosthesis handle part and outer rings fitted with the inner ring of connecting part in the femoral head part. By means of the rolling bearings, the present invention changes the sliding friction between the artificial semi-hip joint and the natural cotyloid cavity into rolling friction in bending-stretching motion direction, and this reduces the wear of prosthesis greatly, prolongs the service life, lowers the production cost and avoids the toxic action of polyethylene and meets the treating requirement of patient.

Description

technical field [0001] The invention relates to an artificial hip joint, in particular to a rolling artificial hip joint, which belongs to the field of medical device artificial joints. Background technique [0002] There are generally two types of hip replacements: total hip replacements and hemi hip replacements. There are two types of artificial hip joints: total hip joints and half hip joints. The components of the total hip joint are specifically divided into two parts. One part is the ball (i.e. the head), which is made of the best and strongest alloy with a very smooth surface. In order to accommodate the joint reason, there is a stem-like body under the ball, which can be inserted into the upper medullary cavity of the human femur (thighbone) and tightly bonded to the femur. There are two commonly used methods of combination: bone cement fixation and biological fixation. The other part is the socket. The hemiprosthesis generally does not include the socket. Alt...

AI Technical Summary

Problems solved by technology

The defect of these artificial hip joints is that the metal prosthesis and the polyethylene acetabulum are rubbed against each other, producing polyethylene abrasive particles, which after being absorbed by the cells, cause a series of problems such as osteolysis of the cells

But it is only an artificial knee joint and cannot be used for hip replacement

After further searching of the prior art, it has not been found that there is any literature report with the same or similar theme as the rolling artificial hip joint of the present invention.

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