PURPOSE Correlations between maximum flexion and functional outcomes in total knee arthroplasty (TKA) patients are reportedly weak. We investigated whether there are differences between passive maximum flexion in nonweight bearing and other types of maximum flexion and whether the type of maximum flexion correlates with functional outcomes. MATERIALS AND METHODS A total of 210 patients (359 k...

Recently developed techniques in the measurement of fluid film bearing dynamic behaviour, including stiffness and damping, have highlighted some interesting observations on the performance of a range of bearings. These are outlined together with suggested strands of further research aimed at improving the efficiency, reliability and cost of operating plant and equipment.

Ultra High Molecular Weight Polyethylene (UHMWPE) remains the only bearing surface of choice in total knee replacements (TKR). While excellent medium term results can be found for knee replacements at ten years, there remains concerns about wear debris induced osteolysis in the longer term, particularly in young and more active patients. It has been shown previously that the wear of fixed beari...

Diagnostic methods including bearing problems represent one of the most important challenges. The scuffing phenomenon initiation of the bearing elements produces an important increase in the vibration level and can be emphasized by the analysis of the bearing friction forces which are the most sensitive indicator of the bearing failure. Commonly used technique for damage detection is the vibrat...