Backside wear of tibial polyethylene components is affected by gait pattern: A knee simulator study using rare earth tracer technology.
Backside wear of tibial polyethylene components is affected by gait pattern: A knee simulator study using rare earth tracer technology.
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胫骨聚乙烯部件的背面磨损受步态模式的影响：使用稀土示踪技术的膝关节模拟器研究。
DOI：
10.1002/jor.24720
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Wimmer,MarkusA
中科院分区：
文献类型：
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作者：
Ngai,Valentina;Kunze,Joachim;Cip,Johannes;Laurent,MichelP;Jacobs,JoshuaJ;Wimmer,MarkusA
本研究的目的是确定两种体内确定的步态模式（一种为低前后（AP）运动，一种为高前后（AP）运动）对总聚乙烯衬垫磨损和背面聚乙烯衬垫磨损的影响，并与ISO（国际标准化组织）标准14243 - 3进行比较。为了区分和准确量化顶面和背面磨损，采用了一种新技术，其中在制造过程中将不同的镧系元素示踪剂掺入聚乙烯中。按照既定方案进行磨粒分析。对于所有受试内衬和运动方案，化学计算的磨损率与重量测定的磨损密切相关。按照AP运动幅度的顺序，两个体内运动组的磨损率均高于ISO组。ISO的背侧磨损占总磨损的2.76% ± 0.90%（平均值± SE），低AP运动方案显著增加至15.8% ± 3.2%，高AP运动方案进一步增加至19.3% ± 0.95%。所有三种运动模式的平均磨损颗粒尺寸均低于200 nm，在AP运动较高的方案中最大。低和高AP步态模式的颗粒释放是ISO方案的1.9至2.8倍。在评估膝关节假体磨损时，测试各种日常活动中背部磨损的比例应是一个重要的考虑因素。
The aim of this study was to determine the effect of two in‐vivo–determined gait patterns, one with low and one with high anteroposterior (AP) motion, on total and backside polyethylene insert wear in comparison with the ISO (International Organization for Standardization) standard 14243‐3. In order to differentiate and accurately quantify topside and backside wear, a novel technique was employed where different lanthanide tracers were incorporated into the polyethylene during manufacture. Wear particle analysis was conducted following established protocols. For all tested liners and motion protocols, the chemically calculated wear rates correlated closely with gravimetrically determined wear. Both in vivo motion groups displayed higher wear rates than the ISO group following the order of the AP motion amplitudes. Backside wear for ISO constituted 2.76% ± 0.90% (mean ± SE) of the total wear, increasing significantly to 15.8% ± 3.2% for the low AP and further increasing to 19.3% ± 0.95% for the high AP motion protocol. The mean wear particle sizes were under 200 nm for all three motion patterns, being largest for the protocol with high AP motion. Particle release from the low and high AP gait patterns was 1.9 to 2.8 times that from the ISO protocol. Testing for the proportion of backside wear across various activities of daily living should be an important consideration in evaluating knee prostheses wear.