Reduction of Stress Variations on Sections (ROSVOS) for a Femoral Component

Abstract

Total knee prostheses have become established arthroplasty applications in the treatment of damaged or weakened cartilage. New implants are being produced using bio-materials which are compatible with human tissue. In the industry, these prostheses are modeled and manufactured in different design geometries. This study investigated using a novel method for an ideal geometry designed to prevent fracture problems caused by design errors and metallurgical weakness in femoral component geometry. This approach is presented in a flowchart demonstrating its implementation, orientation, and evaluation via finite element analysis. Unlike those in the literature, stress variations in the design surface cross sections were evaluated in this proposed design method, for different design types and angles. In this study, the design surface was divided into eight horizontal and ten vertical sections. The main objective of this study is to minimize the stress variations in these sections and to obtain the lowest possible volume value. As a result, stress exceeding the critical ratio was observed in four sections. In addition, three design parameters were found to be the most important for achieving maximum safety and minimum volume in this femoral component design. The method presented in this study aims to evaluate the ideal geometry of models and selection can be applied for the production of many industrial and biomechanical products.