Finite Element Analysis (FEA) of the Different Cement Mixture for Total Hip Replacement

Abstract

Polymethyl methacrylate (PMMA) bone cement was introduced for the total hip replacement component’s fixation. Cement failure in total hip replacement whether in the short-term or long-term will be harmful to the patient’s health and caused osteoarthritis, hip fractures, and dislocations. The purpose was to find the suitable cement mixtures for total hip replacement consists of Young’s Modulus of 2240 MPa, 312.931 MPa, 33.939 MPa and 79.609 MPa which were taken from the previous research. The PMMA cement was used with three different types of proximal cemented techniques such as 40 mm cement reduction, 80 mm cement reduction and full cement (datum). The ANSYS Workbench 2020 R2 software was used to analyze the Charnley Hip Implant with Titanium Ti-6A1-4V (Ti-41) stem model using a Young’s Modulus of 100,000 MPa and a Poisson’s ratio of 0.3. The analysis was based on total deformation and Von Mises stress under different types of loading conditions such as standing, walking, stair climbing and falling. The results showed that all the hip implants were considered safe because their stress does not exceed the yield strength value of the material assigned which is 880 MPa. In conclusion, the 40 mm cement reduction with Young’s Modulus of 2240 MPa obtained the most improved in terms of Von Mises stress and total deformation compared with the full cement (datum) and 80 mm cement reduction with Young’s Modulus of 2240 MPa, 312.931 MPa, 33.939 MPa and 79.609 MPa.