Design and Optimization of Sinusoidal Formed Femur Prosthesis

• Main Authors: Ahmet Zafer ŞENALP, Gökçe AKGÜN, Can CANPOLAT, Ahmet Sinan ÖKTEM, Özgür KALBARAN
• Format: Article
• Language: English
• Published: Suleyman Demirel University 2015-01-01
• Series: Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi
• Online Access: http://dergipark.ulakbim.gov.tr/sdufenbed/article/view/1089005056

One of the major problems in hip replacement surgery is the hip replacement loosening. Hip replacement loosening occurs over time after the surgery and it is related to the discretization between the bone cement and prosthesis. The underlying factors of this situation are the stress occurring in the bone cement and the shape of the prosthesis. In this study, cortical and trabecular layers of the femur, bone cement and prosthesis were modeled. The models of bone cement and prosthesis were constructed parametrically and two different sinusoidal formed prostheses were developed unlike the former prostheses shapes. Analyses were conducted for these two different sinusoidal forms by using finite element method and optimization was conducted to obtain the appropriate prosthesis stem shape and bone cement thickness by using parametric modeling in finite element analyses. For finite element analyses and optimization, Ansys Workbench software was used and analyses were conducted for 316LS stainless steel material. Finally, the optimum prosthesis stem shape and bone cement thickness was determined by using the results of the analyses in the first stage