Artificial hip joint thighbone end prosthesis

Abstract

The invention discloses an artificial hip joint thighbone end prosthesis which comprises a head ball, a full thighbone neck, a full hollow thighbone narrow cavity handle and a thighbone neck inner short handle, wherein the ball head is arranged on the upper end part of the full thighbone neck; the upper end of the full hollow thighbone narrow cavity handle is connected to the outer side of the bottom surface of the full thighbone neck; the thighbone neck inner short handle is arranged at the inner side of the bottom surface of the full thighbone neck; and the full hollow thighbone narrow cavity handle consists of a uniform cross-section tubular upper part and a swallow-tail form tubular lower part. The artificial hip joint thighbone end prosthesis utilizes the full hollow thighbone narrow cavity handle to replace a half hollow thighbone narrow cavity handle of the prior art , thus a swallow-tail form lower end on the full hollow thighbone narrow cavity handle can be inserted into a tubular bone area of a thighbone narrow cavity of a patient. Because the contact area of the full hollow thighbone narrow cavity handle and the thighbone narrow cavity is large and the full hollow thighbone narrow cavity handle is more deeply inserted into the thighbone narrow cavity, the stability of the prosthesis can be increased so as to prolong the service life of the prosthesis and reduce the overhaul rate and the pain of patients.

Description

technical field [0001] The invention belongs to the field of medical instruments, in particular to an artificial hip joint femoral end prosthesis for hip joint replacement. Background technique [0002] At present, the femoral end prosthesis of the artificial hip joint clinically used is mainly divided into two types, one is a stem prosthesis, and the other is a sessile prosthesis. Among them, the prosthesis with handle is divided into prosthesis with collar and prosthesis without collar. The invention patent named artificial hip joint femoral end prosthesis disclosed in Chinese Invention Patent No. 200710057025.5 was submitted and authorized by the applicant of the present invention. figure 1 It is a front partial structure sectional view of the femoral end prosthesis of the artificial hip joint in the prior art. figure 2 for figure 1 A cross-sectional view of the lateral partial structure of the femoral end prosthesis of the artificial hip joint shown. image 3 for f...

AI Technical Summary

Problems solved by technology

The advantage of this artificial hip femoral end prosthesis is that it can maintain the biomechanical characteristics of the original femur, so that the prosthesis can be more fully integrated with the femur, thereby enhancing the stability of the prosthesis and reducing the loosening rate of the prosthesis and the bone loss of the human body, so the service life can be prolonged, but the applicant of the present invention found that during clinical application, since the femoral end prosthesis of the artificial hip joint is a collared half-stem prosthesis, that is, the hollow half-stem of the femoral medullary cavity 3 The length of the femoral medullary canal hollow half stem 3 can only be implanted in the upper part of the patient’s medullary canal, so the stability is poor. Once used for too long like this, the femoral medullary canal hollow half handle 3 may loosen in the patient's femoral medullary cavity, thereby affecting its service life.

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