Revision surgery today already accounts for roughly 15 percent of surgical interventions in knee endoprosthetics. This percentage is growing rapidly, and even more so the absolute numbers. This percentage is growing rapidly, and even more so the absolute numbers. At the same time, multiple replacements are also increasing. More and more primary implantations are being carried out on younger patients at a time when life expectancy in general is growing. For this reason, there is inevitably a steadily increasing number of patients who require a third or fourth endoprosthesis during lifetime. In these situations, an implant linked to a rotating hinge is usually the treatment of choice. However, this type of prosthesis was fraught with unresolved problems until now, due mainly to abrasive wear in the bush bearing and a geometric design which deviates significantly from physiological requirements. Both of these factors can lead to pre mature loosening and implant failure.

The EnduRo knee revision system is based on new concepts for biomechanical materials which practically eliminate the mechanisms that might cause failure. These novel materials are the prerequisite for increasing the service life of rotational hinge implants to that of established primary condylar implants.