Novel artificial hip joint and manufacturing method thereof

Abstract

The invention discloses a novel artificial hip joint and a manufacturing method thereof. The novel artificial hip joint comprises an advanced porous layer PCA (porous coated anatomic) spherical crown (1), an alloy acetabular cup (2), a metal ceramic acetabular lining (3), a metal ceramic femoral head (4), a metal handle (5), a collar (6), an advanced porous layer PCA plane ring (7), a metal handle guide pipe (8) and an advanced porous layer PCA net ring (9). According to the invention, the stress shielding of the artificial hip joint is removed and the proximal femoral osteopenia is prevented through femoral stem separation; the stress shielding on acetabular fossae is removed by increasing the pressure intensity; the osteolysis, the stem looseness and the femoral brittleness caused by wear debris are greatly reduced by using the metal ceramic acetabular lining and the femoral head with flexibility enhancement; and by improving the raw material selection and diffusion welding processes of the PCA structure part, the binding force of the PCA structure part and the bone tissues of a human body is increased, the postoperative problems of a patient are reduced, the comprehensive quality of the artificial hip joint is essentially improved, and the service life of the artificial hip joint is essentially prolonged to be longer than thirty or forty years at least.

Description

technical field [0001] The invention belongs to the field of biomedical devices and relates to the improvement of the structure and performance of artificial hip joints. Background technique [0002] The low quality of the existing artificial hip joints is manifested in its short service life, generally only fourteen or five years, mainly due to the stress shielding effect, wear particles of the polyethylene socket lining or ceramic head and socket embrittlement, which make the artificial hip joint invalid, and Thus, various sequelae and complications are caused by the biological damage to the human body. [0003] The insertion of the artificial prosthesis into the femoral medullary cavity changes the normal stress distribution of the proximal femur. Part of the stress originally borne by the proximal femur is transmitted to the distal femur through the intramedullary prosthesis, resulting in stress shielding (stress transfer) at the proximal femur. This abnormal stress wil...

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Problems solved by technology

[0008] 1. The stress shielding effect produced under the condition of the bone fixation stem is very serious, and it is extremely difficult to solve. In order to make the stem no longer conduct stress and conduct normal stress from the femur, a new method of fixing the stem must be found to eliminate the impact of the artificial hip joint on the femur. Stress shielding on the two parts of the proximal end and the osteotomy surface of the femoral calcar; to create conditions for eliminating stress shielding, the hidden dangers of the primary porous layer PCA must be eliminated first, and it must be transformed to be suitable for bone unit ingrowth, with the same pore size for The advanced porous layer PCA makes the combination rate of bone unit and PCA close to or reach 100% from 10%

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