OPTIMIZATION OF THE CONSTRUCTIVE FORM OF A Ti-6A1-4V ACETABULAR PROSTHESIS

In some medical cases, depending on the development of bone tumours, it is necessary to design and manufacture customized prostheses. The present paper proposes to present the results regarding the design optimization of a customized acetabular prosthesis made of titanium alloy and obtained using the rapid prototyping process. In order to optimize the design, two bone prosthesis assemblies were designed and their in-vitro stability was studied using finite element analysis (FEA). The paper also presents studies on the optimization of the shape of prosthetic models, following which the mechanical stresses and the overall displacements in the bone-prosthesis assembly were reduced by eliminating the stress concentrators. The simulations demonstrated that both models can withstand the normal stresses that occur during the normal use of the prosthesis, but the model with additional ears showed superior stability.