Table 2

Segmental total motion for each specimen (C2–T1) in the intact state and fused state after anterior cervical discectomy with cage placement and plate fixation at C5–C6.^{^a}

Motion Segment	Specimen 1			Specimen 2			Specimen 3			Specimen 4			Specimen 5			Specimen 6
Motion Segment	Intact	Fused	Delta	Intact	Fused	Delta	Intact	Fused	Delta	Intact	Fused	Delta	Intact	Fused	Delta	Intact	Fused	Delta
C2–C3 (°)	10	15	4	9	9	0	8	10	1	15	16	1	13	13	0	10	8	−2
C3–C4 (°)	12	8	−4	16	17	1	8	9	1	9	9	0	11	12	2	10	8	−2
C4–C5 (°)	14	18	4	13	16	3	11	10	−1	9	9	0	11	13	2	12	13	1
C5–C6 (°)	4	1	−3	9	1	−8	10	1	−9	11	3	−8	10	2	−8	8	5	−3
C6–C7 (°)	11	10	−1	11	12	1	15	18	3	9	12	3	10	10	0	12	19	7
C7–T1 (°)	8	8	0	3	4	1	8	12	4	6	7	1	3	8	5	7	13	6

↵a Gray shading indicates motion that exceeded the error of the testing system.