Fractured tibiae were retrieved upon animal sacrifice at 10, 14, 21, and 42 days and tested in torsion at 1°/sec to determine the ultimate torque (A), yield torque (B), torsional rigidity (C), and toughness (D). Data are presented as mean± standard error (SEM). Statistical analysis was performed using bootstrap-adjusted t-tests and statistical significance denoted as follows: *p<0.05 and **p<0.01 compared to Young control group.