Table 1

Statistical comparisons (p-values) of test conditions in each plane of motion.

Testing ConditionsFlexion-ExtensionLateral BendingAxial Rotation
Intact vs.
 Corpectomy< 0.001< 0.001< 0.001
 Round0.639< 0.001< 0.001
 Round + Ant. Plate0.002< 0.0010.992
 Round + Bilat. PS< 0.001< 0.0010.643
 Rect.0.5890.999< 0.001
 Rect. + Ant. Plate< 0.001< 0.0010.980
 Rect. + Bilat. PS< 0.001< 0.0010.867
Corpectomy vs.
 Round< 0.001< 0.001< 0.001
 Round + Ant. Plate< 0.001< 0.001< 0.001
 Round + Bilat. PS< 0.001< 0.001< 0.001
 Rect.< 0.001< 0.001< 0.001
 Rect. + Ant. Plate< 0.001< 0.001< 0.001
 Rect. + Bilat. PS< 0.001< 0.001< 0.001
Round vs.
 Round + Ant. Plate0.054< 0.001< 0.001
 Round + Bilat. PS< 0.001< 0.001< 0.001
 Rect.0.924< 0.0010.026
 Rect. + Ant. Plate0.020< 0.001< 0.001
 Rect. + Bilat. PS< 0.001< 0.001< 0.001
Round + Ant. Plate vs.
 Round + Bilat. PS0.5261.0000.751
 Rect.0.121< 0.001< 0.001
 Rect. + Ant. Plate0.9671.0000.939
 Rect. + Bilat. PS0.4971.0000.900
Round + Bilat. PS vs.
 Rect.0.001< 0.0010.018
 Rect. + Ant. Plate0.6870.9860.739
 Rect. + Bilat. PS0.9870.9980.975
Rect. vs.
 Rect. + Ant. Plate0.050< 0.001< 0.001
 Rect. + Bilat. PS0.001< 0.0010.004
 Rect. + Ant. Plate vs. Rect. + Bilat. PS0.6321.0000.910

  • Round denotes expandable cage with round endcaps, Rect. – expandable cage with rectangular endcaps, Ant. Plate – anterior plate, Bilat. PS – bilateral pedicle screws