Artificial hip joint

Abstract

The invention discloses an artificial hip joint which comprises an acetabular outer cup, an acetabular liner, a thighbone ball and a joint femoral component. The acetabular liner is matched between the inner wall of the acetabular outer cup and the outer surface of the thighbone ball. The joint femoral component is fixed on the thighbone ball. The artificial hip joint is good in wear resistance and lubricating performance, and the service life of the artificial hip joint can be prolonged.

Description

technical field [0001] The invention relates to the field of biomedical materials, in particular to an artificial hip joint. Background technique [0002] Artificial hip replacement is currently the most effective method for the treatment of diseases in the field of bone and joints, and it has enabled many patients with severe bone and joint diseases to recover. [0003] In the clinical application of artificial hip joints, there are still many problems that need to be continuously explored. Among them, the stability of the acetabular cup and the femoral stem of the joint, and the loosening of the artificial joint are two fatal problems. [0004] The loosening of artificial joints is mainly caused by aseptic loosening caused by metal, ceramic, polymer and other debris caused by wear between the joint interface, which makes the matching between the joint head and the acetabular cup section worse, which in turn leads to the failure of the artificial joint and the debris It us...

AI Technical Summary

Problems solved by technology

[0004] The loosening of artificial joints is mainly caused by aseptic loosening caused by metal, ceramic, polymer and other debris caused by wear between the joint interface, which makes the matching between the joint head and the acetabular cup section worse, which in turn leads to the failure of the artificial joint and the debris Usually cause biological reactions in the human body, such as inflammation or rejection, etc., causing harm to the human body

In order to solve the loosening problem of artificial joints, at present, artificial joints are often surface treated, such as titanium beads sintering, titanium wire sintering or spraying titanium alloy powder, bioceramic powder, hydroxyapatite (HA) coating on the surface of artificial joints. etc. However, although these surface treatments can alleviate the loosening problem, they have poor fusion with human bone tissue and have stability problems

[0005] In addition, the debris produced by the long-term wear of the articular surface, the osteolysin caused by the degenerative atrophy of bone cells, resulting in the detachment and loosening of the interface between the acetabular cup and the bone, may still lead to the final failure of the acetabular cup implantation Therefore, it is very important to improve the joint wear resistance while improving the effective combination of the acetabular cup, the femoral stem and the human bone to enhance stability.

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