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Table 1 Torsional stiffness (Nm/deg) of all the animal's femora

From: Use of screw locking elements improves radiological and biomechanical results of femoral osteotomies

   Sheep number Osteotomized bone Non operated bone Difference Percentual difference
Group 6 s DCP + 6 s 1 1.2450 1.8961 0.6511 65.7
2 1.9512 3.3641 1.4129 58.0
3 1.6870 2.4488 0.7618 68.9
4 0.9359 1.5825 0.6466 59.1
Mean ± SD 1.45 ± 0.45a 2.32 ± 0.78   
DCP + 6 s + 2SLE 1 2.6340 1.8145 −0.8195 145.2
2 2.8822 1.8644 −1.0178 154.6
3 2.9860 2.1230 −0.8630 140.7
4 1.7810 1.1800 −0.6010 150.9
Mean ± SD 2.57 ± 0.55*b 1.75 ± 0.40   
Group 8 s DCP + 8 s 1 1.4410 1.6611 0.2201 86.8
2 1.0790 1.3860 0.3070 77.9
3 1.6130 1.8819 0.2689 85.7
4 1.2360 1.4949 0.2589 82.7
Mean ± SD 1.34 ± 0.23c 1.61 ± 0.22   
DCP + 8 s + 2SLE 1 2.2540 1.2710 −0.9830 177.3
2 1.8401 1.2000 −0.6401 153.3
3 1.8880 1.0630 −0.8250 177.6
4 2.5130 1.5670 −0.9460 160.4
   Mean ± SD 2.12 ± 0.32**d 1.28 ± 0.21   
  1. Group DCP + 6 s: plate of 6 screws without SLE euthanized after 16 weeks; Group DCP + 6 s + 2SLE: plate of 6 screws with 2 SLE euthanized after 16 weeks; Group DCP + 8 s: plate of 8 screws without SLE euthanized after 8 weeks; Group DCP + 8 s + 2SLE: plate of 8 screws with 2 SLE euthanized after 8 weeks.
  2. *p = 0.032 when comparing values of osteotomized bones of DCP + 6 s + 2SLE group with values of osteotomized bones of DCP + 6 s group (T test for unpaired samples).
  3. **p = 0.002 when comparing values of osteotomized bones of DCP + 8 s + 2SLE group with values of osteotomized bones of DCP + 8 s group (T test for unpaired samples).
  4. ap = 0.018 when comparing values of osteotomized bones with their contralateral non operated bones of DCP + 6 s group (T test for paired samples).
  5. bp = 0.002 when comparing values of osteotomized bones with their contralateral non operated bones of DCP + 6 s + 2SLE group (T test for paired samples).
  6. cp = 0.001 when comparing values of osteotomized bones with their contralateral non operated bones of DCP + 8 s group (T test for paired samples).
  7. dp = 0.002 when comparing values of osteotomized bones with their contralateral non operated bones of DCP + 8 s + 2SLE group (T test for paired samples).