Characterizing the type and extent of in vivo damage to total joint replacements (TJR) is important for improving the success of arthroplasty outcomes, modeling damage modalities, and validating simulator studies. A method for quantifying the damage present on Cobalt Chrome (CoCr) humeral heads was developed in our lab to fulfill a much-needed gap in clinical knowledge regarding total shoulder replacements as well as metallic bearing surfaces [1,2]. A lack of inter-observer consistency with regard to severity classifications from our initial protocol  prompted several modifications to the method, which are tested and described here in this study. Also, since sub-micron scale ultra-high molecular weight polyethylene (UHMWPE) wear debris is linked to osteolysis and implant loosening, additional analysis with high magnification 3D optical profilometry was performed on a subset of damage modes with a long-term goal of correlating surface damage with propensity for osteolysis in TJR [3,4].
- Bioengineering Division
Profilometry Analysis and Improvements of a Novel Damage Scoring Method for Metal Bearing Surfaces of Shoulder Replacements
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Ansari, F, Patten, EW, Cruz, C, Beitel, E, Swan, A, Gunther, SB, Norris, TR, Reis, M, & Pruitt, L. "Profilometry Analysis and Improvements of a Novel Damage Scoring Method for Metal Bearing Surfaces of Shoulder Replacements." Proceedings of the ASME 2012 Summer Bioengineering Conference. ASME 2012 Summer Bioengineering Conference, Parts A and B. Fajardo, Puerto Rico, USA. June 20–23, 2012. pp. 187-188. ASME. https://doi.org/10.1115/SBC2012-80363
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