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Artificial joint wear evaluation method and artificial joint wear evaluation system

A technology of artificial joints and joints, which is applied in the field of artificial joint wear evaluation methods and evaluation systems, can solve problems such as inaccurate boundary measurement, uncontrollable measurement point cloud accuracy, repeated sample installation errors, etc., to eliminate the inaccuracy of boundary touch detection , Improve the repeatability accuracy, improve the effect of accuracy

Inactive Publication Date: 2014-03-26
XI AN JIAOTONG UNIV
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Problems solved by technology

[0005] In order to overcome the defects of the above-mentioned prior art, the object of the present invention is to provide an artificial joint wear evaluation method and evaluation system, which solves the problem that the measurement point cloud accuracy cannot be controlled in the prior art, and also solves the problem of the joint wear measurement process. Repeated installation errors and inaccurate boundary measurements

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Embodiment Construction

[0057] The present invention will be described in detail below with reference to the drawings and embodiments. It should be understood that the embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0058] Such as figure 1 As shown, a method for evaluating artificial joint wear provided by an embodiment of the present invention includes the following steps:

[0059] Step 1 is S10. Perform three-coordinate measurement path planning on the joints,

[0060] Step 2 is S20, obtaining point cloud data of joints;

[0061] Step three is S30, calculating the wear volume according to the point cloud data;

[0062] Step 4, namely S40, generating a wear nephogram according to the wear volume.

[0063] The three-coordinate measurement path planning for joint wear described in step 1 includes the following steps: S11: Determine the design parameters of the measurement path and establish the part coo...

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Abstract

The invention discloses an artificial joint wear evaluation method and an artificial joint wear evaluation system. The method includes: performing three-coordinate measuring path planning on a joint, then acquiring point cloud data of the joint, and calculating wear volume according to the point cloud data; generating a wear cloud map according to the wear volume. The artificial joint wear evaluation system comprises a measuring path planning module, a point cloud data generation module, a wear calculation module and a cloud map generation module. The three-coordinate measuring path planning is performed before cloud data acquisition, measuring path design and touch measuring vector control are performed before measurement, and precision of measured point cloud data can be controlled, so that accuracy of joint wear evaluation is improved; the problem that measuring point cloud precision is uncontrollable in the prior art is solved, and the problems of repetitive installation error and boundary measurement inaccuracy of samples in the process of joint wear measurement are solved as well.

Description

technical field [0001] The invention belongs to the field of biotribology, is mainly used in the evaluation of artificial joint friction and wear, and particularly relates to an artificial joint wear evaluation method and evaluation system. Background technique [0002] Wear is a key factor affecting the life of artificial joints. Particles produced by wear can induce osteolysis and cause aseptic loosening of joints. This is one of the most important reasons for the failure of artificial joint prosthesis. According to statistics, 80% of artificial joint replacement failures are caused by aseptic loosening caused by osteolysis. At present, the main method for studying artificial joint wear is artificial joint simulator wear test experiment. This experiment can simulate the friction and wear conditions of joints in vivo in vitro. Therefore, accurate measurement of wear is of great significance for studying the wear mechanism and life prediction of artificial hip joints. [...

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Application Information

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IPC IPC(8): A61F2/76
Inventor 王玲彭希锋杨文剑靳忠民李涤尘
Owner XI AN JIAOTONG UNIV
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