Characterization of Hip Implant Surfaces
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Traditional wear assessment is to measure weight loss of an object after it is subjected to service environment. The weight difference, however, does not show how wear is distributed on a surface. This paper presents a novel technique to quantify surface topography of a femoral stem implant. Local wear area/volume can be calculated by measuring the cone angle and systematically scanning the cone surface of an implant with submicron resolution laser. This technique provides not only total wear volume on an implant, but also pinpoints exact location of a significant wear location for design improvement.
author list (cited authors)
Zhujian, F., Trung, L. Q., & Hung, W.