CAD modelling of the human femur taking into account the structure of the bone

¹ Lucian Blaga University of Sibiu, Faculty of Engineering, No. 4, Emil Cioran Str., 550025, Sibiu, România
² Lucian Blaga University of Sibiu, Faculty of Medicine, No. 2A, Lucian Blaga Str., 550169, Sibiu, România
³ University of Kragujevac, Faculty of Engineering, No. 6, Sestre Janjic Str., 34000, Kragujevac, Serbia
⁴ University of Novi Sad, Faculty of Technical Science, No. 6, Dositeja Obradovića Str., 21102, Novi Sad, Serbia

^* Corresponding author: horia.branescu@ulbsibiu.ro

Abstract

The use of 3D models of the human bone system has great utility in the biomechanical study, due to the fact that these structures cannot be analyzed or tested in vivo. Within this paper, taking into consideration its real bone structure, the human femur CAD modelling is established. Firstly, a preliminary anatomical study is done, in order to highlight the fact that the thigh bone is a heterogeneous structure, consisting of several entities with different mechanical characteristics. The modelling starts from a homogenous 3D model of the femur, from which, every single separate entity is designed and finally they are assembled within a single product assembly. Therefore, the final result ensures a complex CAD structure, able to get assigned different material properties, specific for each entity this modelling furtherly allows the characteristic pathological structures studies of the referred entity or to simulate specific surgical interventions.