Table 5.

Reported occurrence of bone posterior to interbody cages.

Joseph & Rampersaud22		Haid, et al26		Lauweryns & Raskin
rhBMP-2	Autograft	rhBMP-2	Autograft	ABM/P-15	Autograft
n = 23	n = 10	n = 32	n = 31	n = 45	n = 45
21%	8%	75%	13%	48%	14%
			Minimal	23%	8%
			Mild	22%	6%
			Moderate	3%	0%