26 research outputs found

    Correlation Between Computed Contact Parameters and Wear Patterns on a Retrieved UHMWPE Tibial Insert

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    Throughout the life of a total knee arthroplasty implant repeated loading causes wear on the contact surfaces. Attempts have been made in the past to predict locations of wear through computational modeling and physical testing. This study examines a method of using computer modeling techniques to describe the kinematics of an implant, and to use kinematic data in finding areas of contact and internal shear stress that correlate to observed wear damage. A retrieved cruciate-retaining knee implant was reverse engineered and analyzed in one cycle of simulated gait using multibody dynamics and aligned according to resulting kinematic data for finite element analysis. Results showed a correlation between the predicted areas of contact and internal shear stresses and the observed wear damage

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