Table 1.

Post-imaging (microCT) volumetric analysis, including calculation of BV and BVF within the defect area, for groups I–V.

Groups	Bone volume (BV, mm3)	Bone volume fraction (BVF, %)
Group I: rhBMP-2	1.71 ± 0.63*	15.65 ± 12.17♭
Group II: rhBMP-2 + OPG	3.47 ± 1.37	34.42 ± 11.28
Group III: rhBMP-2 + delOPG	2.59 ± 0.63	25.42 ± 4.99
Group IV: LV-BMP-2	1.08 ± 0.27†	6.92 ± 2.08†
Group V: LV-BMP-2 + OPG	3.40 ± 0.52	27.48 ± 2.44

^*p < 0.01 versus groups II and V, p > 0.05 vs groups III and IV.

^♭p < 0.01 versus group II, p > 0.05 vs groups III, IV, and V.

^†p < 0.02 versus groups II, III and V, p > 0.05 vs group I.