Comparison of ISO 14243-1 to ASTM F3141 in terms of wearing of knee prostheses

Clinical Biomechanics
Xiao-Hong WangCheng-Kung Cheng

Abstract

The wear properties of knee implants need to be thoroughly evaluated prior to clinical use to ensure implant longevity. ISO 14243-1:2009 and ASTM F3141-17 are the two standards typically used for evaluating wear, with the ISO standard being more common; ASTM F3141-17 was first released in 2015. The aim of this study is to compare differences between these two standards in terms of wearing on a knee prosthesis. Using finite element analysis based on Archard's law, this study evaluated anterior-posterior and internal-external motion, contact area, contact force, contact stress, volumetric wear rate, wear depth, and wear distribution on the knee prosthesis. The results show that simulations performed according to ASTM F3141 produced knee kinematics that were more similar to human gait. The maximum wear depth occurred on the medial side of the tibia. However, the region of peak contact stress did not always correspond with the region of the maximum wear depth, indicating that considering the contact stress alone is not sufficient for evaluating wear as the sliding distance also plays an important role. The resulting wear region from the ASTM F3141 simulation was smaller but deeper than the wear region from the simulation per ISO 14...Continue Reading

Citations

Jul 2, 2020·Annals of Biomedical Engineering·Liming ShuNaohiko Sugita
Sep 27, 2019·Medical Engineering & Physics·Cheng-Kung ChengMao-Dan Nie

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