Modelagem e análise de tensões de uma prótese de ombro

Abstract

Illnesses due to injuries, trauma, lack and excess of physical exercise can create the need for surgical intervention. Partial shoulder arthroplasty is a procedure which a prosthesis is implanted and fixed within the medullary canal of the humerus, replacing the sliding surface. However, the prosthesis has a useful life that is directly related to its biocompatibility, either due to the material of its components or the stress generated in the bone tissue. The present work aims to model a shoulder prosthesis, vary the component materials and analyze the stress that act on the bone-prosthesis assembly. To this end, nine simulations were carried out, modeling the components and alterning them between three materials under the boundary condition in which the load on the prosthesis is maximum. The analyzes were carried out using the finite element method. The result allowed us to determine that all configurations are satisfactory, where the most appropriate, in which there are the lowest stresses distributed in the bone set and in the components of the prosthesis, is the humeral stem made of ASTM F138 and the humeral head of ISO 5832-1.