Keynote Address -- Bearing Surfaces — 2005 -- New Developments in the Basic Science of Ceramics and other Alternative Bearings -- Severe Simulation Test for run-in wear of all-alumina compared to alumina composite THR -- Comparison of the Functional Biological Activity and Osteolytic Potential of Ceramic on Ceramic and Cross Linked Polyethylene Bearings in the Hip -- Allergic reactions to met…