Combined femoral stem

A femoral stem and combined technology, applied in the field of medical prosthesis, can solve problems such as difficulty in achieving normal walking posture of patients, differences in physiological anteversion angle of patients, loosening and failure of prosthesis, etc., to solve loosening and failure of prosthesis, and solve fretting wear , increase the effect of choice

Pending Publication Date: 2020-11-17
WUHAN UNITED IMAGING HEALTHCARE SURGICAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The integral femoral stem is integrally formed. Due to the limitation of production cost, the integral femoral stem is generally only made with an anteversion angle of 0°. After installation, it will cause a difference from the patient's physiological anteversion angle, making it difficult for the

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  • Combined femoral stem
  • Combined femoral stem
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Embodiment Construction

[0039] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0040] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a s...

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Abstract

The invention relates to the technical field of medical prostheses, in particular to a combined femoral stem. The combined femoral stem comprises a stem body, a femoral neck and a filling layer, wherein the stem body is provided with a mounting groove; one end of the femoral neck extends into a mounting groove; the filling layer is stuffed between the femoral neck and the inner wall of the mounting groove, and the filling layer is fixedly connected with the stem body and the femoral neck. According to the combined femoral stem, the stem body and the femoral neck are of a split structure, the femoral neck with different forward inclination angles can be prepared, the combined femoral stem can adapt to wider forward inclination angle changes, the choice of a patient is increased, and besides, compared with an existing integrated femoral stem structure, the production cost can be reduced. The femoral neck and the stem body are connected through the filling layer, so that connection firmness of the femoral neck and the stem body is guaranteed, the problem of fretting abrasion of an existing press-fit type femoral stem is solved, and the problem of prosthesis looseness and failure caused by osteolysis is also solved.

Description

technical field [0001] The invention relates to the technical field of medical prostheses, in particular to a combined femoral stem. Background technique [0002] A femoral stem is a medical prosthesis that can replace a diseased bone in the human body. [0003] Existing femoral stems are generally divided into two structures: integral type and split type. The integral femoral stem is integrally formed. Due to the limitation of production cost, the integral femoral stem is generally only made with an anteversion angle of 0°. After installation, it will cause a difference with the patient's physiological anteversion angle, making it difficult for the patient to achieve a normal walking posture. [0004] In the split femoral stem, the femoral neck is inserted into the stem body and fit through press fit. There will be fretting wear during actual use, and the resulting debris will cause osteolysis, resulting in loosening and failure of the prosthesis. [0005] Therefore, ther...

Claims

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Application Information

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IPC IPC(8): A61F2/36
CPCA61F2/3609A61F2002/3625A61F2002/30014A61F2002/30329
Inventor 李超宁
Owner WUHAN UNITED IMAGING HEALTHCARE SURGICAL TECH CO LTD
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