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Effect of Stem Design on Contact Pressure and Stress Distribution of End-of-stem in Revision TKR  

Kim, Yoon-Hyuk (경희대학교 테크노공학대학, 산학협력기술원)
Kwon, Oh-Soo (카톨릭의대 의정부 병원)
Park, Si-Mon (경희대학교 대학원 기계공학과)
Publication Information
Journal of the Korean Society for Precision Engineering / v.23, no.11, 2006 , pp. 126-134 More about this Journal
Abstract
In this study, the effect of stem-end design on contact pressure and stress distribution in revision TKR was investigated using finite element method. The finite element model of tibia, including the cortical bone, the cancellous bone and canal, was developed based on CT images. The implant models with various stem lengths, diameters, friction coefficients, and press-fit effects were considered. The results showed that the longer stem length, the stronger press-fit, the bigger stem diameter, and the higher friction coefficient increased both peak contact pressure and Von-Mises stress distributions. The results supported the clinical hypothesis that peak contact pressure and stress are related to the stem end pain. The results of this study will be useful to design the stem and reduce the end-of-stem pain in revision TKR.
Keywords
Revision TKR; Finite element analysis; Stem pain; Stem design;
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