Zirconium-niobium alloy hip joint prosthesis system containing oxide layer and preparation method

Abstract

The invention discloses a zirconium-niobium alloy hip joint prosthesis system containing an oxide layer and a preparation method. The system comprises a femoral stem, a femoral head, a lining and an acetabular cup; the acetabular cup and the femoral stem are prepared from zirconium-niobium alloy powder serving as a raw material through hot isostatic pressing, cryogenic treatment and surface oxidation; the acetabular cup and the femoral stem are provided with a partition bone trabecula; and the femoral stem and the acetabular cup are integrally formed through 3D printing, the problems that a complex structure cannot be manufactured through traditional machining, and connection and matching of an oversleeve and a femoral stem body fail are solved, the bone trabecula and a solid body are highin bonding strength and not prone to disengagement, and the service life of the prosthesis is prolonged. The bone trabecula enables most compressive strain values of bone tissue to be within 1000-3000 microstrain, accords with the bone growth theory, guarantees uniform ingrowth of a bone in a bone trabecula area, and achieves excellent biocompatibility and bone ingrowth of an osseointegration interface and super-strong wear resistance and a low wear rate of a friction interface. The oxidation layer is formed on the surfaces of the femoral head and the lining after oxidation, so that super-strong wear resistance and low wear rate of the friction interface are realized.

Description

technical field [0001] The invention relates to the technical field of artificial joints, in particular to a zirconium-niobium alloy hip joint prosthesis system containing an oxide layer and a preparation method. Background technique [0002] Artificial hip replacement surgery is one of the most important and effective operations for the treatment of end-stage diseases such as femoral head necrosis, hip dysplasia, degenerative hip osteoarthritis, rheumatoid arthritis, etc. , such patients are increasing year by year. [0003] Currently clinically used artificial hip joint prosthesis includes bone cement fixed prosthesis and non-cement fixed prosthesis. Among them, the non-cemented prosthesis has been more and more widely used because of its good bone ingrowth performance. [0004] The osseointegration interface of non-cemented hip prosthesis usually adopts the following two methods: the first is spraying hydroxyapatite coating or titanium coating on the surface of the femo...

AI Technical Summary

Problems solved by technology

However, the surface coating in the first method has the risk of falling off, which affects the use effect

The cuff in the second method is an assembly structure with the femoral stem. Clinical studies have shown that in order to combine the femoral stem with the cuff in the structural design, there is a problem of sudden change in the section of the head and neck of the stem in the structural design. There are very serious stress concentrations

The problem with the combination of titanium alloy ball head and highly cross-linked inner lining is that the debris formed by wear of highly cross-linked polyethylene can easily cause osteolysis

However, the solid part of 3D printing products is prone to problems such as uneven microstructure and internal defects, and the mechanical properties are not good; the powder in the structure of the trabecular bone is not well sintered, and the mechanical properties are poor.

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