TABLE 1.

Interbody Bony Fusion Rate

	3 mo	6 mo†	9 mo†	12 mo
SBG fusion rate	2/4	4/4	4/4	4/4
Control fusion rate	0/4	0/4	0/4	1/4

The number of levels, out of the total number of levels operated for the control and synthetic bone graft (SBG) groups, was evaluated by computed tomography as interbody bony fusion during the 12-month study period. Fusion rates were compared using the Fisher exact test for each timepoint.

^†P=0.029.

Statistical significance was set at P<0.05.