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 [1] 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].
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ASME 2012 Summer Bioengineering Conference
June 20–23, 2012
Fajardo, Puerto Rico, USA
Conference Sponsors:
- Bioengineering Division
ISBN:
978-0-7918-4480-9
PROCEEDINGS PAPER
Profilometry Analysis and Improvements of a Novel Damage Scoring Method for Metal Bearing Surfaces of Shoulder Replacements
Farzana Ansari,
Farzana Ansari
University of California, Berkeley, Berkeley, CA
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Eli W. Patten,
Eli W. Patten
University of California, Berkeley, Berkeley, CA
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Cynthia Cruz,
Cynthia Cruz
University of California, Berkeley, Berkeley, CA
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Erin Beitel,
Erin Beitel
University of California, Berkeley, Berkeley, CA
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Amelia Swan,
Amelia Swan
University of California, Berkeley, Berkeley, CA
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Steve B. Gunther,
Steve B. Gunther
Martha Jefferson Hospital, Charlottesville, VA
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Tom R. Norris,
Tom R. Norris
San Francisco Shoulder, Elbow & Hand Clinic, San Francisco, CA
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Michael Reis,
Michael Reis
University of California, San Francisco, San Francisco, CA
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Lisa Pruitt
Lisa Pruitt
University of California, Berkeley, Berkeley, CA
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Farzana Ansari
University of California, Berkeley, Berkeley, CA
Eli W. Patten
University of California, Berkeley, Berkeley, CA
Cynthia Cruz
University of California, Berkeley, Berkeley, CA
Erin Beitel
University of California, Berkeley, Berkeley, CA
Amelia Swan
University of California, Berkeley, Berkeley, CA
Steve B. Gunther
Martha Jefferson Hospital, Charlottesville, VA
Tom R. Norris
San Francisco Shoulder, Elbow & Hand Clinic, San Francisco, CA
Michael Reis
University of California, San Francisco, San Francisco, CA
Lisa Pruitt
University of California, Berkeley, Berkeley, CA
Paper No:
SBC2012-80363, pp. 187-188; 2 pages
Published Online:
July 19, 2013
Citation
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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