Table 2

The Preoperative and Postoperative Foraminal Area on Sagittal CT Scans (mm2)

	Proximal Recess				Lateral Foramen

	SurgiFile		Standard		SurgiFile		Standard

	Preop	Postop	Preop	Postop	Preop	Postop	Preop	Postop
Cadaver 1 L2—3	1800	3700	2100	3000	1900	4000	2400	2900
Cadaver 1 L3—4	1700	4300	1950	3200	2200	4500	2800	3200
Cadaver 1 L4—5	1450	4100	1850	3100	1700	4000	2700	3000
Cadaver 1 L5—S1	1400	3000	1600	2400	1500	3500	2600	2600
Cadaver 2 L2—3	1900	3500	1750	3000	2000	2900	1900	1900
Cadaver 2 L3—4	2400	3200	1550	3000	3200	3800	1800	2100
Cadaver 2 L4—5	1900	2700	1350	2200	2500	2900	2000	2400
Cadaver 2 L5—S1	1900	2600	1700	2400	2300	2900	1850	1900
Average	1,806.25	3,387.50	1,731.25	2,787.50	2,162.5	3,562.5	2,256.30	2,500.00