Acetabular cup and artificial hip joint

Abstract

The invention provides an acetabular cup and an artificial hip joint. The acetabular cup comprises a hemispherical body and an extension component or a plurality of extension components. The body comprises an acetabular cup opening, and femoral heads can penetrate the acetabular cup opening; the extension components are connected onto the body in an extensible manner and can be extended towards the outer side of the acetabular cup opening. According to the technical scheme, the acetabular cup and the artificial hip joint have the advantages that extension and retraction of the extension components can be adjusted according to the acetabular fossea of the anatomical structures of different patients, the original peripheral portion of the body is in contact with the cancellous bones of the patients, and accordingly excellent bone ingrowth effects can be realized; the extension components which are extended out of the edge of the outer wall of the acetabular cup opening are in contact with the cortical bones at the outer edges of the acetabular fossea of the patients, accordingly, force can be effectively transferred to the cortical bones of the patients, stress generated between the acetabular cup and the cancellous bones can be reduced, the cancellous bones are difficult to collapse, the acetabular cup can be firmly fixed into the acetabular fossea and is excellent in stability, the problems of collapse of the cancellous bones and fixing failures of existing acetabular cups due to excessively high stress can be solved, and the service life of the artificial hip joint can be prolonged.

Description

technical field [0001] The invention relates to the technical field of artificial joints, in particular to an acetabular cup and an artificial hip joint. Background technique [0002] The hip joint is one of the largest and most important joints in the human body, bearing a large portion of the body's body weight. However, diseases such as osteoarthritis, rheumatoid arthritis, aseptic necrosis of the femoral head, traumatic arthritis, and congenital acetabular dysplasia can cause hip joint pain and loss of function, which seriously affects the lives of patients . At present, artificial hip replacement surgery has become an effective means of treating hip diseases. The artificial hip joint prosthesis used in this operation includes a femoral prosthesis and an acetabular cup prosthesis, and the firmness and stability of the acetabular cup prosthesis is one of the most critical factors affecting the life of the artificial hip joint prosthesis. The biological acetabular cup i...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide an acetabular cup and an artificial hip joint to solve the problem of the collapse of the cancellous bone caused by the high stress on the contact surface between the acetabular cup and the cancellous bone in the prior art

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