Custom made hip stem insertion - a dynamic finite element simulation

Abstract

A good initial stability and an intimate stem-bone contact are essential for the long term success of cementless total hip replacement (THR). For this reason it is important to identify the contact areas, to observe how the contact areas evolve during the stem insertion, and to understand the load transfer mechanisms. The custom made prostheses (CMP) are designed to fit and fill as much as possible the femoral cavity and as a consequence an optimal contact and stability can be obtained. This paper presents a 3D transient dynamic analysis performed to observe the evolution of contact surface, stress and strain distribution during the insertion of a cementless CMP.status: publishe