The use of Raman spectroscopy in the analysis of UHMWPE uni-condylar bearing systems after run on a force and displacement control knee simulators

► We used two knee simulators with different input control mechanisms. ► The differences in wear behaviour were assessed using a CMM. ► Raman spectroscopy was used to evaluate the changes in crystallinity of the UKP menisci. ► This research is an important issue in the field of biomaterials.