Influence Of The Material Type, Flexion Degree And Axial Compressive Loads On Contact Stress Generation On The Tibial Insert Of The Total Knee Endoprosthesis

Abstract

Total knee joint endoprosthesis implantation is one of the most common surgery today performed in humans. Replacement of the damaged articular surface, restoration of basic knee joint functions, and pain elimination are the basic objectives of these surgery. The aim of this study is to analyze stress distribution on the tibial insert made of polyethilen UHMWPE depending on metal components’ material types, knee joint flexion, and axial compressive loads. In this study we have used reconstructed models of the femur and tibia. Knee joint prostheses model, as well as the analysis of stress distribution is created using Catia V5. The results show approximately uniform stress distribution for a given knee prosthesis design, corresponding pressure, flexion degree, and material of the tibial and femoral components. Maximal stress values are located on the lateral and medial part of the tibial insert, and thus are not of the crucial importance for the tibial insert wearing.