A method for evaluating articular cartilage damage and wear

A technology of articular cartilage and evaluation method, which is applied in measurement devices, instruments, electric/magnetic profile/curvature measurement, etc., can solve the problems of misjudgment of surface damage, roughness, etc. Effect

Active Publication Date: 2017-12-22
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no necessary relationship between surface roughness and damage and wear. With different degrees of damage, the surface of cartilage may become smoother or rougher, so surface damage and wear will lead to misjudgment

Method used

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  • A method for evaluating articular cartilage damage and wear
  • A method for evaluating articular cartilage damage and wear
  • A method for evaluating articular cartilage damage and wear

Examples

Experimental program
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Effect test

Embodiment 1

[0026] For bovine articular cartilage with low surface wear. The femoral condyle bone with bovine articular cartilage on the surface was cut into a fan shape with a thickness of 20 mm and a radian of 100°, and the fan-shaped bovine articular cartilage was fixed on the sample fixture with bone cement; the physiological movement of the femoral head was simulated on a swing test machine to gather The ethylene plate sample is used as the grinding pair, under the lubricating effect of 25% calf serum, the load is 150N, the swing frequency is 1Hz, and the swing cycle is 3600 revolutions, and the worn bovine articular cartilage is obtained as follows: figure 2 As shown; the segmented bovine articular cartilage wear area is divided into 13 slices and scanned in the MRI system. During the scanning process, the mode is 256×256 matrix, and the field of view is 20×20mm, so each pixel corresponds to The area is 6084μm 2 , while the slice thickness is 1 mm. Use Analyze 8.1 software to per...

Embodiment 2

[0028] For bovine articular cartilage with severe surface wear. The femoral condyle bone with bovine articular cartilage on the surface was cut into a fan shape with a thickness of 20 mm and a radian of 100°, and the fan-shaped bovine articular cartilage was fixed on the sample fixture with bone cement; the physiological movement of the femoral head was simulated on a swing test machine, and the The flat plate sample is used as the grinding pair, under the lubricating effect of 25% calf serum, the load is 350N, the swing frequency is 1Hz, and the swing cycle is 3600 revolutions, and the severely worn bovine articular cartilage is obtained as follows: Figure 5 As shown; the segmented bovine articular cartilage wear area is divided into 23 slices and scanned in the MRI system. During the scanning process, the mode is 256×256 matrix, and the field of view is 20×20mm, so each pixel corresponds to The area is 6084μm 2 , slice thickness is 1mm. Use Analyze 8.1 software to perform...

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Abstract

The invention discloses a method for evaluating the damage and wear of articular cartilage. Firstly, fresh bovine articular cartilage is extracted from the bovine knee joint, cut into a fan shape with a thickness of 20 mm and a radian of 100°, and the fan-shaped bovine articular cartilage is fixed on the sample by bone cement. On the fixture, simulate the physiological movement of the femoral head on the swing testing machine to conduct friction and wear experiments; then divide the worn area of ​​the fan-shaped bovine articular cartilage into 10-50 slices and scan in the MRI system, using a scanning mode of 256×256 matrix , the scanning field of view is 20×20mm, and the slice thickness is 1mm; then use Analyze 8.1 software to perform curve fitting on the original articular surface and prominent wear area of ​​each slice, accurately calculate the wear area, and then calculate the wear area of ​​each slice The area is integrated to obtain the wear volume of bovine articular cartilage, so as to evaluate the damage of bovine articular cartilage. It can accurately measure the amount of wear of articular cartilage, and provide a theoretical basis for studying the friction and wear characteristics of articular cartilage.

Description

technical field [0001] The invention relates to an evaluation method, in particular to an evaluation method for articular cartilage damage and wear that can accurately measure the wear volume of various articular cartilages. Background technique [0002] Articular cartilage plays an important role in joint movement. However, when a person reaches a certain age, the fibrous degeneration and elasticity of the joints will weaken, the extension ability of the articular cartilage will gradually weaken, and the ability to restore the original shape will weaken; the articular cartilage will be easily damaged and worn, which will cause degenerative arthritis. Assessment of damage is important. [0003] Under experimental conditions, there are currently many studies on the friction and wear behavior between joints and biomedical materials in the world, involving the measurement of the friction coefficient of articular cartilage and the evaluation of surface damage. At present, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/00G01B7/28
Inventor 罗勇杨婷刘秋真刘星星应鹏展
Owner CHINA UNIV OF MINING & TECH
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