Cam femoroacetabular impingement (FAI), enlarged aspherical femoral headneck junction, is recognized as a pathomechanical process associated with osteoarthritis (OA) [1,2]. The selection of material properties in finite element analysis (FEA) when modelling the hip joint has been long disputed. Linear elastic isotropic models were commonly used for low-frequency, quasi-static conditions, where the femur was considered as two separate, isotropic bones – cortical and trabecular [3,4]. It was further suggested that trabecular bone can be neglected in FEA, due to its low functional stiffness and in attempts to reduce processing time [5]. Since bone is an anisotropic composite, it is postulated that the femur would be better modelled as an orthotropic material [6,7], accounting for both cortical and trabecular bones, thus eliminating the need to segment the trabecular component and alleviate the overuse of computer memory.