The stiffness data from FEA was normalized to the values in the MIL orientations. Significant difference was observed: AP vs. ML, p<0.05; ML vs. ATTmax, p<0.0001; ML vs. UVmax, p<0.0001; ML vs. MIL, p<0.0001; PD vs. ATTmax, p<0.001; PD vs. UVmax, p<0.001; PD vs. MIL, p<0.001. No significant difference was observed between the stiffness in the PSOs predicted by ultrasound parameters and μCT.