TABLE IV.

Surgical Complications

	Arthroplasty (N = 206)	Fusion (N = 93)	P Value
Dural tear	14 (6.8%)	2 (2.2%)	0.16
Infection	1 (0.5%)	0 (0.0%)	1.00
Seroma	1 (0.5%)	0 (0.0%)	1.00
Hematoma	1 (0.5%)	0 (0.0%)	1.00
Adjacent segment degeneration*	0 (0.0%)	5 (5.4%)	0.003
Retained drains	2 (1.0%)	0 (0.0%)	1.00
Reoperation†	11 (5.3%)	8 (8.6%)	0.31

^*Defined as symptomatic stenosis at a motion segment adjacent to the index surgical level requiring reoperation for symptom relief.

^†The 11 arthroplasty patients underwent a total of 15 reoperations. The 8 fusion patients underwent a total of 10 reoperations.