TRIBOLOGICAL BEHAVIOUR OF Co-Cr-Mo and UHMWPE THE COMPONENTS OF INTERVERTEBRAL DISC PROSTHESIS

The Intervertebral Disc Prostheses consist of a modular system and his function is based on low intervertebral friction. As a result of friction forces acting to the spine structures, the intervetebral disc prostheses can develop wear phenomena of the polymeric nucleus. From a tribological point of view the most important problems are the friction and the wear, specifics to the endoprostheses system, because these two phenomena dictate their durability. The objective of this study is to measure these tribological parameters using different versions of the laboratory installations or stands and different friction couples. In this sense, the development on the tribomodels who simulates the normal joint function is the most used solution