Table 6.

Radiographic Outcomes for 2-Level TDR and ACDF at 7 years.

Outcome	Treatment	Superior Level	Inferior Level
ROM in Flexion/Extension	TDR	9.3 ± 5.8°	7.4 ± 5.2°
	ACDF	0.2 ± 0.2°	0.6 ± 0.8°
ROM in Lateral Bending	TDR	4.8 ± 3.4°	4.9 ± 3.4°
	ACDF	0.4 ± 0.4°	0.7 ± 0.9°
FSU Height Change from PreOp	TDR	0.8 ± 1.2 mm	0.2 ± 1.1 mm
	ACDF	1.5 ± 0.8 mm	1.6 ± 0.9 mm
FSU Height Change from PostOp*	TDR	-0.5 ± 0.4 mm	-0.4 ± 0.4 mm
	ACDF	-0.7 ± 0.7 mm	-0.9 ± 0.9 mm
Adjacent Segment Degeneration	TDR	37.5% (57/152)	30.3% (33/109)
	ACDF	80.8% (42/52)	66.7% (28/42)

Values given are mean ± SD unless otherwise indicated.

^*Prior to discharge from hospital.