Fig. 9A–D.

A severely damaged component shows the contact geometry. (A) The acetabular liner and shell indicate the presence of a noncontact region. (B) Liner taper damage could be identified visually by discoloration and texture. (C) A change in the surface topography could be seen at higher magnification (×15) and (D) evidence of material loss could be identified at ×200 magnification. The axial profile (overlay) shows surface measurement along the taper and agrees with scanning electron microscopy analysis. The fit region was −3.2 to −1.6 mm on the distance axis.