Table 2:
Flexural strength test derived macro-mechanical properties of 15-week-old male and virgin and lactating female control and TβRIIocy−/− mice.
| Flexural Strength parameters | Male | Female | Lactation | |||
|---|---|---|---|---|---|---|
| Control | TβRII ocy−/− | Control | TβRII ocy−/− | Control | TβRII ocy−/− | |
| Stiffness (N-mm2) | 189.8 ± 24.0 | 169.7 ± 28.9 | 173.9 ± 20.3 | 177.1 ± 24.4 | 129.6 ± 22.5a | 161.2 ± 14.7 |
| Yield load (N) | 14.4 ± 1.9 | 12.5 ± 2.3 | 14.0 ± 1.1 | 13.7 ± 1.1 | 12.0 ± 1.7a | 13.8 ± 1.2 |
| Post-yield displacement (%) | 0.87 ± 0.71 | 0.55 ± 0.25 | 0.54 ± 0.19 | 0.72 ± 0.19 | 0.59 ± 0.18 | 1.27 ± 0.51 |
| Modulus (GN/m2) | 9.06 ± 1.99 | 6.2 ± 1.51* | 9.0 ± 2.45 | 8.8 ± 2.63 | 7.88 ± 1.38 | 9.41 ± 1.40 |
| Yield Stress (Mpa) | 115.6 ± 13.9 | 80.4 ± 23.98* | 118.4 ± 21.8 | 108.7 ± 22.9 | 135.3 ± 29.1 | 135.9 ± 15.2 |
| Ultimate Stress (Mpa) | 189.5 ± 22.5 | 189.30 ± 37.5 | 191.05 ± 30.2 | 227.1 ± 43.5 | 167.3 ± 20.0 | 169.7 ± 4.45 |
| MOI (mm4) | 0.117 ± 0.02 | 0.158 ± 0.05 | 0.113 ± 0.03 | 0.118 ± 0.03 | 0.077 ± 0.02a | 0.084 ± 0.01 |
*
p<0.05 significantly different from the male control virgin group (Student’s t-test),
a
p<0.05 significantly different from the female control virgin group.