Table 5.
Mechanical and histomorphometric analyses of the femur and tibia from the Si-deprived, Si-supplemented and reference group of animals
| Groups |
|||
|---|---|---|---|
| Si-deprived (n = 20) | Si-supplemented (n = 10) | Reference group (n = 10) | |
| Fracture parameters (femur) | |||
| Torsion moment (Nm) | 0.67 (0.09) | 0.67 (0.07) | 0.74 (0.10 |
| Torsion angle (°) | 10.6 (1.9) | 11.1 (0.8) | 11.3 (1.9) |
| Torsion stiffness (Nm/rad) | 7.2 (1.7) | 6.5 (0.5) | 7.6 (1.9) |
| Energy absorbed (J) | 0.073 (0.014) | 0.076 (0.010) | 0.086 (0.020) |
| Histomorphometric (tibia) | |||
| Bone area (%) | 25.9 (6.6) | 24.2 (11.1) | 33.7 (6.2) |
| Osteoid area (%) | 0.73 (0.83) | 0.49 (0.48) | 0.24 (0.21) |
| Osteoid width (μm) | 2.93 (0.51) | 2.81 (0.46) | 2.76 (0.21) |
| Osteoblast perimeter (%) | 35.7 (24.3) | 19.6 (16.8) | 19.2 (21.8) |
| Osteoclast perimeter (%) | 16.4 (17.4) | 13.7 (11.7) | 12.3 (9.0) |
| Mineral apposition rate (μm/day) | 2.19 (0.38) | 2.33 (0.46) | 2.15 (0.69) |
| Bone formation rate (μm2/mm2/day) | 875 (617) | 912 (883) | 554 (355) |
| Trabecular thickness (μm) | 60.3 (9.8) | 65.6 (10.0) | 66.2 (10.4) |
| Trabecular number (mm-1) | 5.47 (1.13) | 4.54 (1.64) | 6.47 (0.62) |
| Trabecular separation (μm) | 135 (66) | 202 (167) | 89.7 (20.4) |
Means (± SE). No significant difference between the Si-deprived and Si-supplemented groups.
Reference group is standard rodent stock feed-fed animals.