Comparison of four modular TKA prosthesis designs using static finite element analysis

摘要

Four modular Total Knee Arthroplasty (TKA) prosthesis designs (Cruciate Retaining, Anterior Slide, Tibial Post and Double Cam) based on Indian anthropometric data is considered for linear static Finite Element Analysis (FEA) in the study. von Mises stresses are studied for all the components of four different designs at 0°, 15°, 30°, 60° and 90° flexion angles. Stress distribution in the Polyethylene (PE) insert is of critical importance in deciding the longevity of the prosthesis. Peak von Mises stresses in PE insert are found to be 11.02 MPa, 32.13 MPa, 59.25 MPa and 23.78 MPa for Cruciate Retaining, Anterior Slide, Tibial Post and Double Cam design respectively. Results indicate yielding of PE insert in three designs (Anterior Slide, Tibial Post and Double Cam) and the reasons being less congruity and edge loading.