Table 1.
Stiffness coefficients for the main diagonal of the reduced fourth-order stiffness tensor, Cii (GPa), and the apparent density, ρ (g/cm3), for cortical bone specimens grouped along the length of the femoral diaphysis showing the mean (± one standard deviation).
| % Length | C11 | C22 | C33 | C44 | C55 | C66 | ρ |
|---|---|---|---|---|---|---|---|
| 85 | 12.2 (1.7) | 18.0 (1.8) | 24.6 (1.9) | 5.6 (0.5) | 4.4 (0.5) | 3.8 (0.2) | 1.80 (0.08) |
| 80 | 16.6 (3.8) | 19.2 (2.9) | 26.5 (2.5) | 5.9 (0.5) | 5.6 (0.6) | 4.3 (0.8) | 1.88 (0.10) |
| 75 | 19.4 (1.8) | 21.2 (1.2) | 29.0 (1.4) | 6.3 (0.3) | 6.1 (0.3) | 4.8 (0.4) | 1.96 (0.04) |
| 70 | 18.4 (2.6) | 20.2 (2.4) | 27.6 (2.0) | 6.1 (0.6) | 6.1 (0.2) | 4.7 (0.4) | 1.94 (0.07) |
| 65 | 19.5 (2.5) | 19.9 (2.5) | 28.4 (2.0) | 6.1 (0.4) | 6.1 (0.6) | 4.8 (0.6) | 1.96 (0.05) |
| 60 | 18.0 (3.0) | 19.3 (2.9) | 27.5 (2.1) | 6.3 (0.0) | 5.9 (0.6) | 4.7 (0.5) | 1.92 (0.06) |
| 55 | 19.0 (3.6) | 18.9 (2.5) | 27.3 (2.4) | 6.2 (0.3) | 6.0 (0.5) | 4.8 (0.7) | 1.91 (0.09) |
| 50 | 18.9 (2.7) | 19.3 (2.0) | 27.8 (2.1) | 6.0 (0.3) | 5.9 (0.2) | 4.6 (0.4) | 1.93 (0.05) |
| 45 | 18.1 (1.8) | 20.5 (1.0) | 28.2 (1.2) | 6.2 (0.2) | 5.9 (0.7) | 4.3 (1.1) | 1.94 (0.03) |
| 40 | 17.2 (2.0) | 19.1 (1.3) | 26.7 (1.6) | 6.3 (0.2) | 5.8 (0.6) | 4.7 (0.4) | 1.94 (0.00) |
| 35 | 16.9 (1.7) | 20.3 (0.9) | 27.6 (0.8) | 6.3 (0.3) | 5.9 (0.6) | 4.7 (0.6) | 1.90 (0.07) |
| 30 | 15.9 (1.8) | 19.9 (1.1) | 27.5 (0.6) | 6.3 (0.3) | 5.9 (0.5) | 4.9 (0.9) | 1.90 (0.04) |
| 25 | 16.1 (0.7) | 20.7 (2.7) | 29.6 (0.9) | 6.4 (0.5) | 5.5 (0.7) | 4.1 (0.5) | 1.92 (0.06) |
| 20 | 13.6 (2.1) | 18.8 (4.0) | 27.2 (2.0) | 6.2 (0.5) | 4.8 (0.9) | 3.8 (0.8) | 1.85 (0.09) |
| 15 | 11.6 (2.2) | 19.5 (2.2) | 24.5 (1.0) | 6.2 (0.3) | 4.8 (1.3) | 4.1 (1.0) | 1.80 (0.03) |
| All | 16.8 (2.3) | 19.7 (2.1) | 27.3 (1.6) | 6.2 (0.4) | 5.6 (0.8) | 4.5 (0.7) | 1.90 (0.07) |