Bearing-Foreign Material Deposition on Retrieved Co-Cr Femoral Heads: Composition and Morphology

Figure 7

XPS data obtained from a 1 × 1 mm area in the deposit region on head A (site marked with an asterisk () in Figure 1A), showing presence of impurities corroborating the data observed in EDS. Nominal surface compositions associated with this scan are O: 68.75%, Al: 3.07%, P: 9.39%, Ca: 8.13%, Ti: 7.01%, Co: 3.68%, Cr: 0.2%, and W: 0.03%.