Table 2.

Segmental range of motion* (mean ± SD) with (control) anterior lumbar interbody fusion (ALIF) cage (°).

	Intact	ALIF	ALIF + PS	% Change ALIF from Intact	% Change ALIF + PS from Intact
Flexion-extension 0 N	7.4 ± 1.8	5.2 ± 1.4	0.8 ± 0.3	−28 ± 15%	−89 ± 4.7%
Flexion-extension 400 N	7.4 ± 1.6	2.9 ± 0.8	0.6 ± 0.1	−61 ± 12%	−92 ± 1.9%
Lateral bending	8.9 ± 1.9	3.9 ± 1.7	1.1 ± 0.4	−56 ± 14%	−88 ± 3.4%
Axial rotation	2.6 ± 2.1	1.6 ± 0.9	0.6 ± 0.3	−22 ± 36%	−66 ± 22%

Abbreviation: PS, pedicle screws.

^*Reported ranges of motion are from combined L2–L3 and L3–L4 motion data.