13th International Conference on Fracture June 16–21, 2013, Beijing, China -9- Figure 14 - Cortical hardness for the lower extremities of left femurs. *p<0.01 for OS+S vs. F+S and OS+S vs. OS+B. **P~0.05 for OS+S vs. OS+A. 3.2.2 Elastic Modulus The indentation elastic moduli of the left femurs are similar. Figure 15 shows the values of the right femurs and there is an obvious difference between the four groups. The cortical elastic modulus of the control group (OS+S) is lower than that of each of the treatments. In the operated bones the medical treatments increase the cortical elastic modulus to the values of a normal fracture. Figure 15 - Bar chart of indentation elastic modulus for right femurs 4. Conclusions Traditional techniques used to characterize the mechanical behavior of engineering materials can successfully be applied to biological materials. The methods used enable the comparison of the effects of the medical treatments on the mechanical properties of the material studied. F+S OS+S OS+A OS+B F+S OS+S OS+A OS+B C T C T C T C T C: Cortical T: Trabecular
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