Table 1. Allocation of defect sites and processing for this study.

		Sites at each time point
	Description	Day 0	3 weeks	6 weeks	12 weeks
Group 1	Sorrento Bone Graft Substitute	2	7*	7*	6
Group 2	Vitoss Foam Strip	2	7*	7*	6
Group 3	Autograft (Positive control)	-	2^	2^	2
Group 4	Empty defects (Negative control)	-	-	-	2

Two sites were allocated for Groups 1 and 2 at time 0 to provide baseline for radiography and histomorphometry studies. A total of 7 sites (7*) were examined at 3 and 6 weeks for Groups 1 and 2 and distributed between Paraffin Histology (3 sites for Paraffin Histology and 4 sites for PMMA Histology)