Trabecular bone properties means, standard deviations (±S.D.) and range (in parentheses).

BV/TV stands for bone volume fraction, Tb.N for trabeculae per mm, Tb.Th for trabecular thickness in mm, Tb.Sp for trabecular separation in mm, DA for degree of anisotropy and ConnD for connectivity density per mm3. L and M stand for lateral and medial VOIs respectively.Trabecular bone properties differences between humans and chimpanzees were tested for statistical significance using the Wilcoxon rank-sum test. Statistically significant differences between humans and chimps (P# Out of the six chimpanzees only two had 2D-PTO angles larger than 90°, the other four chimpanzees had 2D-PTO angles lower than 83° which is much lower than human 2D-PTO angle range.