[In-Vitro Analysis of Polyethylene Liner Wear Performance at 3 and 5 Million Cycles].

Q4 Medicine

中国医疗器械杂志 Pub Date : 2024-07-30 DOI:10.12455/j.issn.1671-7104.230705

Shitong Yan, Jianjun Wang, Jian Su

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引用次数: 0

Abstract

Objective: The purpose of this study is to compare the wear properties of UHMWPE acetabular liners after undergoing 3 million (3 Mc) and 5 million (5 Mc) cycles of in-vitro wear testing. The results will serve as a reference for the design of in-vitro testing for hip prostheses and as a control for clinical revision removals.

Methods: Wear tests were conducted on three different sizes of acetabular liners (28 mm, 32 mm, and 36 mm internal diameters) using a hip simulator to determine the amount of wear after 3 and 5 million cycles. The analysis included the number, size, and shape of abrasive particles.

Results: After 3 and 5 million cycles of wear, the amount of wear on the acetabular liner increased as the inner diameter increased. The abrasive particles had an average equivalent circular area diameter (ECD) of 0.27 μm and 0.29 μm, and 94.4% and 90.1% of the aspect ratio (AR) less than 4.

Conclusion: The amount of wear on the acetabular liner after 3 Mc wear can indicate the wear performance of the product. The number of particles increased and the percentage of fibrous particles was higher after 5 Mc wear compared to 3 Mc wear.

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[300 万和 500 万次循环时聚乙烯衬垫磨损性能的体外分析]。

目的：本研究旨在比较超高分子量聚乙烯髋臼衬垫在经过 300 万 (3 Mc) 次和 500 万 (5 Mc) 次体外磨损测试后的磨损特性。结果将作为髋关节假体体外测试设计的参考，以及临床翻修取出的对照：使用髋关节模拟器对三种不同尺寸的髋臼衬垫（内径分别为 28 毫米、32 毫米和 36 毫米）进行了磨损测试，以确定 300 万和 500 万次循环后的磨损量。分析包括磨粒的数量、大小和形状：结果：经过 300 万和 500 万次循环磨损后，髋臼衬垫的磨损量随着内径的增加而增加。磨料颗粒的平均等效圆面积直径（ECD）分别为 0.27 μm 和 0.29 μm，94.4% 和 90.1% 的长宽比（AR）小于 4.结论：经过 3 Mc 磨损后，髋臼衬垫的磨损量可以说明产品的磨损性能。与 3 Mc 磨损相比，5 Mc 磨损后颗粒数量增加，纤维颗粒的百分比更高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

中国医疗器械杂志 Medicine-Medicine (all)

CiteScore

0.40

自引率

0.00%

发文量

8086

期刊介绍：