In-Vitro Analysis of Polyethylene Liner Wear Performance at 3 and 5 Million Cycles
10.12455/j.issn.1671-7104.230705
- VernacularTitle:聚乙烯髋臼内衬300万次和500万次体外磨损性能研究
- Author:
Shitong YAN
1
;
Jianjun WANG
;
Jian SU
Author Information
1. 北京市医疗器械检验研究院,北京市,101111
- Keywords:
ultra-high molecular weight polyethylene;
wear performance;
wear volume;
particle analysis
- From:
Chinese Journal of Medical Instrumentation
2024;48(4):467-472
- CountryChina
- Language:Chinese
-
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.
