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Table 4 The comparison of the ROM between our FE model and the previous in vitro experimental study

From: Biomechanical evaluation of three surgical scenarios of posterior lumbar interbody fusion by finite element analysis

Segment Moment (Nm) Extension and flexion Left and right lateral bending Left and right torsion
   In vitro FEA In vitro FEA In vitro FEA
  2.5 7.5(1.35) 6.64 6.5 (1.4) 6.9 2.7(1.3) 3.62
L1-L2 5 8.3(1.3) 8.69 7.6 (1.35) 8.5 2.6(1.5) 3.04
  7.5 9.2(1.25) 8.93 8.9(1.2) 9.32 3.9(1.1) 3.47
  10 10.4(1.45) 10.2
9
10.2(1.5) 9.78 4(1.7) 4.02
  2.5 6.5(1.25) 7.62 8.8(1.2) 9.23 2.7(0.9) 3.24
L2-L3 5 10.1(1.2) 9.06 10.7(1.3) 11.2 3.15(1) 3.78
  7.5 11.1(1.2) 10.94 12(1.55) 13 3.9(0.85) 4.47
  10 11.5(1.3) 10.29 13(1.15) 13.43 5(0.95) 5.48
  2.5 8.3(1.75) 7.65 8.3(1.85) 8.43 2.5(1.1) 3.51
L3-L4 5 10.5(2.2) 8.93 10.5(2.15) 9.5 3.7(1.05) 4.27
  7.5 9.9(1.6) 10.24 11.4(1.5) 11.9 4.7(1.15) 4.79
  10 11.3(1.7) 1.78 12.2(1.7) 13.2 5.1(1.38) 5.76
  2.5 10(1.3) 11.25 7.5(1.45) 8.21 1.8(1.02) 2.57
L4-L5 5 12.5(2.25) 12.95 10.2(2.25) 10 2.4(0.85) 3.27
  7.5 14(2) 14.6 11.1(2.1) 10 2.8(1.2) 3.94
  10 14.8(2.1) 14.2 12.2(2.25) 13.23 3.7(1.5) 4.23
  2.5 13.5(3.3) 13.68 7.7(2.3) 8.2 1.5(0.55) 2.09
L5-S1 5 15.1(1.95) 16.17 9.3(2.15) 8.3 1.8(0.75) 2.35
  7.5 16.4(2) 17.66 10.2(2.2) 11 2(0.65) 2.48
  10 16.9(2.05) 17.29 11.3(2.35) 12.56 2.5(0.75) 2.7
  1. (The ROM of each segment was determined by taking the sum of the two motions. The numbers in the brackets were the standard deviations.)
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