步态周期下CoCrMo、SS 316L和Ti6Al4V股骨头与超高分子量聚乙烯髋臼杯之间的计算接触压力预测

Computational Contact Pressure Prediction of CoCrMo, SS 316L and Ti6Al4V Femoral Head against UHMWPE Acetabular Cup under Gait Cycle.

作者信息

Jamari J, Ammarullah Muhammad Imam, Santoso Gatot, Sugiharto S, Supriyono Toto, Prakoso Akbar Teguh, Basri Hasan, van der Heide Emile

机构信息

Department of Mechanical Engineering, Faculty of Engineering, Diponegoro University, Semarang 50275, Central Java, Indonesia.

Undip Biomechanics Engineering & Research Centre (UBM-ERC), Diponegoro University, Semarang 50275, Central Java, Indonesia.

出版信息

J Funct Biomater. 2022 May 23;13(2):64. doi: 10.3390/jfb13020064.

Due to various concerns about the use of metal-on-metal that is detrimental to users, the use of metal as acetabular cup material was later changed to ultra high molecular weight polyethylene (UHMWPE). However, the wear on UHMWPE releases polyethylene wear particles, which can trigger a negative body response and contribute to osteolysis. For reducing the wear of polyethylene, one of the efforts is to investigate the selection of metal materials. Cobalt chromium molybdenum (CoCrMo), stainless steel 316L (SS 316L), and titanium alloy (Ti6Al4V) are the frequently employed materials. The computational evaluation of contact pressure was carried out using a two-dimensional axisymmetric model for UHMWPE acetabular cup paired with metal femoral head under gait cycle in this study. The results show Ti6Al4V-on-UHMWPE is able to reduce cumulative contact pressure compared to SS 316L-on-UHMWPE and CoCrMo-on-UHMWPE. Compared to Ti6Al4V-on-UHMWPE at peak loading, the difference in cumulative contact pressure to respective maximum contact pressure is 9.740% for SS 316L-on-UHMWPE and 11.038% for CoCrMo-on-UHMWPE.

由于对金属对金属使用存在各种有害于使用者的担忧，髋臼杯材料后来从金属改为超高分子量聚乙烯（UHMWPE）。然而，UHMWPE的磨损会释放聚乙烯磨损颗粒，这会引发负面的身体反应并导致骨质溶解。为了减少聚乙烯的磨损，其中一项努力是研究金属材料的选择。钴铬钼（CoCrMo）、316L不锈钢（SS 316L）和钛合金（Ti6Al4V）是常用材料。本研究使用二维轴对称模型对步态周期下UHMWPE髋臼杯与金属股骨头配对的接触压力进行了计算评估。结果表明，与SS 316L-on-UHMWPE和CoCrMo-on-UHMWPE相比，Ti6Al4V-on-UHMWPE能够降低累积接触压力。与峰值加载时的Ti6Al4V-on-UHMWPE相比，SS 316L-on-UHMWPE的累积接触压力与各自最大接触压力的差值为9.740%，CoCrMo-on-UHMWPE为11.038%。