an acetabular cup

Abstract

An acetabulum cup comprises a hemispherical liner, a backing and a porous material, wherein the porous material is installed on the outer surface of the backing and is a hierarchical-pore metal material, the hierarchical-pore metal material includes at least two or more hierarchical levels, the hierarchical-pore metal material is composed of hierarchical pore cavities hierarchical according to the pore diameter sizes of the material and hierarchical cavity walls defining the pore cavities in a surrounding mode, the cavity walls forming the upper-level pore cavities in a three-dimensional space surrounding mode is made from a lower-level porous metal material, the hierarchical pore cavities are mutually communicated and are also thorough. The acetabulum cup facilitates that tissues fully grow in the acetabulum cup, and tight fusion of the acetabulum cup and the tibia is achieved, so that an interface is firm, and a looseness phenomenon is avoided.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an artificial acetabular cup. 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 total hip replacement is the most successful means of treating end-stage hip joint diseases, and the acetabular cup is an important part of the artificial total hip joint system. [0003] The current acetabular cup is mainly composed of a lining and a backing material. The lining can be made of metal, ceramics, or polymer materials. The lining is currently mostly made of polymer materials, such as ultra-high molecular w...

AI Technical Summary

Problems solved by technology

However, the porous materials used above are all single-pore materials, and the disadvantage of single-pore materials is that the wall of the hole is still a dense material. After the acetabular cup is implanted, when the force is applied, although the overall elastic modulus of the material Not high, but due to the high elastic modulus of the dense material of the cavity wall, it is difficult for the cells on the cavity wall of the porous material to feel the stimulation of the force, and stress shielding occurs, which is not conducive to cell growth and tissue ingrowth. The acetabular cup is not conducive to the fusion of the acetabular cup and the surrounding bone, so that the interface between the acetabular cup and the adjacent bone tissue is not firm, and it will become loose. It is difficult to meet the functional requirements of the acetabular cup for artificial total hip replacement.

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