Table 2

Radiostereometric segmental rotations in sagittal plane over time after dynamic stabilization with Dynesys, PLF, and discectomy

MotionsTimeDynamic stabilization (mean ± SD) (°)PLF (mean ± SD) (°)Discectomy (mean ± SD) (°)
Flexion1 mo1.2 ± 0.71.3 ± 0.33.3 ± 2.6
1 y0.7 ± 0.91.3 ± 0.52.7 ± 2.8
2 y1.0 ± 1.10.2 ± 0.21.7 ± 0.2
Mean1.0 ± 0.9* 1.0 ± 0.6* 2.9 ± 2.4
Extension1 mo2.3 ± 1.61.1 ± 0.92.7 ± 1.8
1 y1.0 ± 0.41.2 ± 1.11.8 ± 1.3
2 y1.7 ± 1.40.7 ± 0.31.8 ± 0.3
Mean1.5 ± 1.21.1 ± 0.9* 2.3 ± 1.5
SROM1 mo2.9 ± 0.41.5 ± 1.14.8 ± 1.9
1 y1.8 ± 1.01.8 ± 0.35.1 ± 3.2
2 y2.3 ± 1.70.9 ± 0.03.4 ± 0.0
Mean2.3 ± 1.2* 1.5 ± 0.6* 4.7 ± 2.2

  • ↵* Significantly different compared with discectomy group.