Table 4
Change in disc height
Operative level
Preop DH (mm)
Baseline DH (mm)
ΔDH, preop to baseline
ΔDH, baseline to 12-month follow-up
L4-(4) (n = 4)
8.5 ± 2.7
13.9 ± 1.6
5.4 mm
0.1 mm
L5-S1 (n = 12)
8.7 ± 1.5
15.7 ± 1.4
7.0 mm
−0.6 mm