Artificial caput femoris

Abstract

The invention discloses artificial caput femoris which comprises a carbon nano tube hydrogel composite layer (1), a bacterial cellulose hydrogel composite layer (2), a solid core (3), a boundary lubricating layer (5) and longitudinal fiber (6). The carbon nano tube hydrogel composite layer (1) is composed of polyvinyl alcohol hydrogel doped with carbon nano tubes. The bacterial cellulose hydrogel composite layer (2) is composed of bacterial cellulose soaked in polyvinyl alcohol hydrogel. The longitudinal fiber (6) extends into the carbon nano tube hydrogel composite layer (1) from the solid core (3). The artificial caput femoris is simple and compact in structure and can effectively improve joint impact resistance and lubricating performance.

Description

technical field [0001] The invention relates to an artificial femoral head used for artificial hip joint replacement, in particular to an artificial femoral head capable of buffering impact and increasing lubrication through a gradient fiber structure. Background technique [0002] Artificial joint is a kind of prosthesis similar to human bone joint structure made of biomedical materials with good biocompatibility and mechanical properties. Artificial joint replacement refers to the use of such artificial joints to replace or replace damaged or damaged joints. It has the comprehensive advantages of reconstructing joint function, relieving joint pain, correcting joint deformity, maintaining joint stability and repairing limb length. It is an effective and clinically proven method. treatment pathway. Since Charnley proposed hip replacement in 1972 to lay the foundation for artificial joint replacement, it has become universally recognized as one of the most successful surgica...

AI Technical Summary

Problems solved by technology

In the existing traditional artificial hip joints, hard materials such as ceramics or metals are generally used as the joint head. The elastic modulus of ceramics or metals is very large, which is very different from the natural joint head of the human body with a small elastic modulus, which is not conducive to artificial joints. Improved impact resistance and lubricating properties of the hip joint

[0004] Patent application number 201010299147.7 discloses an artificial hip joint composed of multi-layer shell-core composite structural parts. In this type of joint, both the artificial acetabulum and the artificial femoral head have a multi-layer shell-core composite structure, mainly composed of ceramic acetabulum The lining, transition layer and porous metal or ceramics are composed of a gradient structure, but the surface and the composite layer are made of hard ceramic or alloy materials. There is no longitudinal fiber support in the composite layer, which is natural to the human body with a small elastic modulus. The joint head is very different, which affects the improvement of the impact resistance and lubrication performance of the artificial hip joint

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