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The mean (sd) micro motion over the first two years of nineteen femoral Articular Surface Replacement (ASR) components was a lateral movement of 0.107 (0.513) mm, distal migration of 0.055 (0.204) mm, and anterior movement of 0.150 (0.413) mm. The backward tilt around the x axis was -0.08 (1.088), there was 0.165 (0.924) internal rotation and 0.238 (0.420) varus tilt. The baseline to 2 year varus tilt was statistically significant from zero movement, but on a group level no significant movementdoi:10.1016/j.jot.2014.07.137 fatcat:fozr2yfcrzdc5idjr4joqn7sou