کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
873965 910323 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of conformity and contact stress on wear in fixed-bearing total knee prostheses
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی پزشکی
پیش نمایش صفحه اول مقاله
Effect of conformity and contact stress on wear in fixed-bearing total knee prostheses
چکیده انگلیسی

Ultra high molecular weight polyethylene (PE) remains the primary bearing surface of choice in total knee replacements (TKR). Wear is controlled by levels of cross-shear motion and contact stress. The aim of this study was to compare the wear of fixed-bearing total knee replacements with curved and flat inserts and to test the hypothesis that the flat inserts which give higher contact stresses and smaller contact areas would lead to lower levels of surface wear. A low-conforming, high contact stress knee with a low-medium level of cross shear resulted in significantly lower wear rates in comparison to a standard cruciate sacrificing fixed-bearing knee. The low wear solution found in the knee simulator was supported by fundamental studies of wear as a function of pressure and cross shear in the pin on plate system. Current designs of fixed-bearing knees do not offer this low wear solution due to their medium cross shear, moderate conformity and medium contact stress.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Biomechanics - Volume 42, Issue 12, 25 August 2009, Pages 1898–1902
نویسندگان
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