Biomimetic artificial hip joint with internal growth function

Abstract

The invention discloses a biomimetic artificial hip joint with an internal growth function. The joint is composed of an artificial cartilage layer, an interface bonding layer and a porous bracket, wherein the artificial cartilage layer and the porous bracket have elliptic surfaces; the surface wrapping angle of the joint is 60-120 degrees; when the wrapping angle is 80-120 degrees, 3-6 convex columnar bodies, which are uniformly distributed, are designed on the inner surface of a prosthesis along the peripheral direction; a porous coating with biological activity is prepared on the outer surface of a femoral component and materials of the coating have gradient changes from inside to outside; the porous bracket is designed into a porous structure with gradient according to a finite element optimization result, and the pore diameter is 300-800 microns; the porosity is 20%-85%. According to the biomimetic artificial hip joint disclosed by the invention, bone mass and biomechanical characteristics of thigh bones can be kept to the greatest extent; the biomimetic artificial hip joint has good mechanical properties and tribological properties; the growth of bone cells is induced or promoted so as to guarantee effective interface bonding intensity between a prosthesis implantation material and a natural bone, the stability of the planted prosthesis is improved and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of artificial joints for repairing damaged articular cartilage, and in particular relates to a bionic artificial hip joint with an in-growth function. Background technique [0002] Hip joint lesions are caused by osteoarthritis, aseptic femoral head necrosis, bone tumors, etc., and with the aging population in the world, fractures caused by osteoporosis are becoming more and more prominent. Millions of patients need to be treated every year. Accepting joint repair treatment seriously affects the quality of life of patients. [0003] The main symptom of arthritic disease is articular cartilage lesions, and its treatment is mainly selected according to the degree of cartilage lesions. Cartilage transplantation can be used for repair in the initial stage, such as: bone marrow stimulation, autologous cartilage transplantation, allogeneic cartilage transplantation, autologous chondrocyte transplantation, artific...

AI Technical Summary

Problems solved by technology

Ding Chunming and others invented "A Biphasic Scaffold for Tissue Engineering Joint and Its Preparation Method and Application" (Application No.: 201310202139.X), which provides a possibility for tissue engineering joints to replace the current artificial joints for biological reconstruction. There are still deficiencies in fixation and load-carrying performance

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