“…The femurs were instrumented with 15 triaxial strain-gages, mainly in the femoral head-neck region, and tested non-destructively (Cristofolini et al, 2009). The strain prediction accuracy of the proposed numerical method in the elastic range is good (determination coefficient (R 2 ) of 95%, Root Mean Squared Error (RMSE) of 7%, maximum error of less than 45%) and is not significantly worsened when using morphing to mesh the FE models (Grassi et al, 2011). In eight femurs that were tested to failure under a loading condition that realistically replicated the fracture patterns for spontaneous fractures of proximal femurs Juszczyk et al, 2011), the failure load was predicted with an average error lower than 15% .…”