Table 3.

Degree of engraftment of the autoclaved autogenous bone for each animal by group

	6th week (%)	12th week (%)
Group 1	0.00	37.50
	0.00	19.90
	29.01
Group 2	3.16	57.68
	43.44	69.79
	60.26	87.00
Group 3	0.00	0.93
	0.89	2.05
	ND	8.11

Only subjects whose entire graft shapes were clear on the slide were measured. One subject was excluded from group1 and group 2 at 6th week, and from group 2, and group 3 at 12th week. Two subjects were excluded in group 3 at 6th week, and from group 1 at 12th week. Engraftment degree: proportion of united perimeter within the entire AAB perimeter. Perimeters of the entire graft were measured at low magnification, with the presence or absence of fusion being judged by observing osteoid, including the osteocyte and reversal line at high magnification. Only AAB reinserted (group 1), and AAB and ErhBMP-2 inserted using an ACS (group 2) or FG (group 3) as a carrier.

ND, no data; AAB, autoclaved autogenous bone; ErhBMP-2, Escherichia coli-derived recombinant human bone morphogenetic protein-2; ACS, absorbable collagen sponge; FG, fibrin glue.