Table 1

Interpedicular Travel (IPT,mm) at index L4-5 level. Reported as Mean ± Standard deviation.

Loading ModeIntactUni-FRUni-FR + PDR
Flexion-Extension (No FL)130 ± 3.914.6 ± 4.1114.3 ± 3.82
Flexion-Extension (FL)**10.2 ± 3.510.5 ± 3.711.5 ± 3.0
Lateral Bending**9.6 ± 3.310.7 ± 3.812.2 ± 4.4
Axial Rotation**3.5 ± 1.83.9 ± 3.34.8 ± 5.3

  • ↵1 Indicates Uni-FR IPT > Intact IPT (p = 0.008)

  • ↵2 Indicates Uni-FR + PDR IPT > Intact IPT (p = 0.043)

  • ↵** Indicates no significant difference (p > 0.05) between instrumentation conditions