Abrasion test device for tibiofemoral joint of bi-dimensional rotating and bi-dimensional movement synthesized knee replacement prosthesis

A wear test and motion synthesis technology, applied in the direction of prosthesis, medical science, etc., can solve the problems of immaturity and perfection of joint prosthesis, and achieve the effect of strong adjustability, accurate wear characteristics and wear prediction, and many degrees of freedom.

Inactive Publication Date: 2012-01-18
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the manufacturing industry of knee joint prosthesis, the technology and equipment of wear test of joint prosthesis are not mature and perfect in foreign countries, and it has just started in China.

Method used

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  • Abrasion test device for tibiofemoral joint of bi-dimensional rotating and bi-dimensional movement synthesized knee replacement prosthesis
  • Abrasion test device for tibiofemoral joint of bi-dimensional rotating and bi-dimensional movement synthesized knee replacement prosthesis
  • Abrasion test device for tibiofemoral joint of bi-dimensional rotating and bi-dimensional movement synthesized knee replacement prosthesis

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Experimental program
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Embodiment Construction

[0022] Further elaborate the technical scheme of the present invention in conjunction with accompanying drawing:

[0023] See figure 1 , the present invention is a synthetic knee replacement prosthesis tibiofemoral joint wear test machine with two rotations and two shifts, which is composed of two parts, the right part and the left part, and the position connection relationship between them is: the left part is on the left side of the testing machine. The right part is on the right side of the testing machine, and the rocker in the crank-rocker mechanism in the right part is connected with the main shaft in the femoral system in the left part.

[0024] The left part produces the flexion and extension wear motion between the joint surfaces of the prosthesis, and the right part is the driving structure in the flexion and extension motion of the prosthesis joint.

[0025] The technical scheme and principle of the left part:

[0026] The left part mainly includes a main shaft 25...

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Abstract

The invention provides an abrasion test device for a tibiofemoral joint of a bi-dimensional rotating and bi-dimensional movement synthesized knee replacement prosthesis, which consists of a right part and a left part, wherein the right part is arranged at the right side of the test device and is a drive structure used in the bending and stretching movement of the prosthesis joint; the left part is arranged at the left side of the test device and produces the bending and stretching abrasion movement between the side of the prosthesis joint; and a rocker rod in a four-rod mechanism of the right part is connected with a main shaft in a thigh bone system of the left part. The invention meets the standard requirements of iso14243, the abrasion test of a shank bone prosthesis and a thigh bone prosthesis tries to be conducted in an environment which is similar to the biologic environment of the replacement prosthesis in the human body, the abrasion process approaches the real abrasion condition of the knee prosthesis, and the abrasion property and the abrasion prediction are more accurate. Meanwhile, the test deice has a bigger active control freedom of degree and strong adjustability. The inertia force loading mode enables the structure to be more simple and compact. The invention has higher practicable value and broad application prospects in the technical fields of knee joint prosthesis manufacture and medical instruments.

Description

(1) Technical field [0001] The invention relates to a testing machine for detecting the wear characteristics of knee joint prosthesis. In particular, the invention relates to a two-rotation and two-shift motion synthetic knee replacement prosthesis tibiofemoral joint wear tester, which belongs to the technical field of knee joint prosthesis manufacturing and medical equipment. (two) background technology: [0002] Knee articular cartilage damage caused by aging, coupled with heavy traffic, traffic accidents and extreme sports injuries have led to a rapid increase in the incidence of knee replacement. Critical issues in the joint prosthesis manufacturing industry. However, in the knee joint prosthesis manufacturing industry, the technology and equipment for wear testing of joint prosthesis are not yet mature and perfect in foreign countries, and it has just started in China. This is not compatible with the increasing demand for joint replacement surgery; at the same time, t...

Claims

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Application Information

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IPC IPC(8): A61F2/76
Inventor 黄荣瑛郑海东郑红光郭云飞
Owner BEIHANG UNIV
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