Table 3.

Micro CT results at 4- and 8-week time-points

Groups	Bone mineral density*	p value
Saline
4 weeks	0.951 ± 0.0179	–
8 weeks	1.01 ± 0.852	–
Buffer + HA/TCP
4 weeks	1.43 ± 0.116	0.0001
8 weeks	1.15 ± 0.301	0.72
Low-dose rhBMP-2 + HA/TCP
4 weeks	1.50 ± 0.0101	0.007
8 weeks	1.06 ± 0.0223	0.90
High-dose rhBMP-2 + HA/TCP
4 weeks	1.59 ± 0.217	0.002
8 weeks	1.37 ± 0.271	0.03

* Values represent ratio of BMD on operative side to that on contralateral non-operative side (mean ± standard deviation)

p values represent comparison to control group. Bold indicates statistical significance