Computational wear prediction of artificial knee joints based on a new wear law and formulation.

摘要: Laboratory joint wear simulator testing has become the standard means for preclinical evaluation of resistance artificial knee joints. Recent designs have been advanced and successful at reproducing patterns observed in clinical retrievals. However, a single test can be very expensive take long time to run. On other hand computational modelling is an alternative attractive solution these limitations. Computational models used extensively prediction optimisation designs. all adopted classical Archard's law, which was developed metallic materials, selected factors arbitrarily. It known that such approach not generally true polymeric bearing materials difficult implement due high dependence factor on contact pressure. Therefore, studies are independent lack general predictability. The objective present study develop new model implants, based area experimentally determined non-dimensional coefficient. effects cross-shear creep predictions were also considered. predicted volume compared with laboratory simulation measurements. run under two different kinematic inputs insert curved custom designed flat surfaces. shown capable predicting difference pattern between tibial Conversely, did predict differences. good agreement found experimental results, both scar areas volumetric rates, suggests law calculated coefficient should more reliable therefore provide robust virtual platform.