Table 2.

Comparison of histologic defect healing and bone ingrowth of the entire defect and defect–implant interface among five graft treatment groups (mean ± SD)

Graft treatment	Percent bone defect healing	Bone ingrowth
Allograft bone	43.8% ± 4.8%	1.1% ± 1.9%
1:5 BMP:allograft (0.03 mg)	48.4% ± 9.2%	15.7% ± 7.5%
1:5 BMP:allograft (0.09 mg)	40.9% ± 5.6%	8.9% ± 1.5%
1:1 BMP:allograft (0.22 mg)	40.9% ± 7.0%	12.4% ± 11.3%
BMP (0.43 mg)	29.2% ± 6.0%	4.3% ± 3.8%
Analysis of variance p value	0.014 BMP versus allograft, BMP versus 1:5 ratio (0.03 mg)	0.036 allograft versus all other groups