Table 1 Summary of the three test forces and parameters of the vertebrae on micro-CT and MSCT
Measure unit | Mean (standard deviation) | |
|---|---|---|
Test forces (n = 68) | ||
Peak torque | N m | 678 (246) |
Pull-out force | N | 357 (130) |
Implant stability quotient value | Arbitrary units | 36.5 (7.90) |
Micro-CT parameters (n = 68) | ||
Volume bone mineral density | mg/cm3 | 69.6 (30.5) |
Bone volume/total volume | – | 29.6 (10.7) |
Bone surface/total volume | mm−1 | 1.80 (0.350) |
Trabecular thickness | μm | 328 (73.0) |
Trabecular separation | μm | 863 (328) |
Trabecular number | mm−1 | 0.876 (0.170) |
Structure model index | – | 1.86 (0.534) |
Node number/total volume | mm−3 | 0.647 (0.159) |
Multislice CT parameters (n = 58) | ||
Volume bone mineral density | mg/cm3 | 183 (28.1) |
Bone volume/total volume | – | 91.1 (10.8) |
Bone surface/total volume | mm−1 | 4.16 (0.903) |
Trabecular thickness | μm | 780 (252) |
Trabecular separation | μm | 81.0 (14.2) |
Trabecular number | mm−1 | 1.28 (0.416) |
Node number/total volume | mm−3 | 0.764 (0.0230) |