Compound partial femoral head surface prosthesis

A femoral head and prosthesis technology, applied in the direction of femoral head, prosthesis, medical science, etc., can solve the problems of acetabular cartilage wear, large interface difference, and prosthesis failure, so as to prolong the survival period and avoid prosthesis Effect of implant failure, long-term stable biological fixation

Inactive Publication Date: 2007-08-22
WEST CHINA HOSPITAL SICHUAN UNIV
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Problems solved by technology

However, the main material of the surface prosthesis of the femoral head currently used is metal, and the biological and mechanical properties of the surface prosthesis made of metal materials such as creep, elastic modulus, and the interface between the human acetabular side cartilage are relatively large, and it is easy to Caused acetabular cartilage wear, leading to failure of the prosthesis and had to be replaced by artificial total hip replacement

Method used

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  • Compound partial femoral head surface prosthesis

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0014] Referring to Fig. 1, the composite femoral head part surface prosthesis of the present invention comprises pin 20 and the prosthesis component 10 profiling with the femoral head articular surface, and described prosthesis component 10 is made by polyvinyl alcohol hydrogel, so The upper part of the pin 20 is connected with the prosthesis component 10 to form a whole.

[0015] Polyvinyl alcohol hydrogel is an organic biomaterial that has attracted widespread attention in recent years. It has a porous structure similar to natural cartilage and contains a lot of water. Under load, the liquid can penetrate or squeeze out like articular cartilage. , the extruded liquid acts like synovial fluid to lubricate and play a role in buffering stress, reducing friction between articular surfaces and reducing wear of articular surfaces. The biological propertie...

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Abstract

The present invention discloses one kind of compound partial femoral head surface prosthesis with very low wear to the cartilage and long lifetime. The compound partial femoral head surface prosthesis includes one pin and one prosthesis member copying the femoral head joint surface. The prosthesis member is made of PVA aquegel, and the pin has its upper part connected to the prosthesis member integrally. The present invention has the advantages of the excellent tribological characteristic of the prosthesis member, low wear to the cartilage, long term biological fixing and long lifetime.

Description

technical field [0001] The invention relates to a prosthesis for artificial joint replacement on the partial surface of the femoral head, in particular to a composite prosthesis on the partial surface of the femoral head. Background technique [0002] Artificial joint replacement has become an effective treatment for joint diseases today. However, due to the defects in the design and production materials of the artificial joint prosthesis itself and the large difference in biomechanical properties between the material and the human articular cartilage and bone tissue, the prosthesis is prone to loosening, subsidence and acetabular side joints when implanted in the body. Wear of the facial cartilage, etc., leads to failure of the prosthesis. At the same time, the survival time of the prosthesis itself is limited, and some patients, especially those with stage III avascular necrosis of the femoral head, are mostly between 30 and 50 years old. For the normal bone of the femor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/36A61L27/14A61L27/06A61L27/32
CPCA61F2/36A61F2002/30001
Inventor 康鹏德裴福兴沈彬杨静廉永云张晖
Owner WEST CHINA HOSPITAL SICHUAN UNIV
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