Table 2.

Study variables versus predictor variable (augmentation technique).

	GBR (n = 15)	RBG (n = 13)	P
	Mean ± SD	Mean ± SD
Patient number	13	11
Graft sites	15	13
Age, years	48.73 ± 10.96	48.92 ± 9.61	a0.962
Gender, F/M, n
Male	5 (33.3)	6 (46.2)	b0.761
Female	10 (66.7)	7 (53.8)
Implant torque, sites
Up	6 (40.0)	9 (69.2)	b0.243
Down	9 (60.0)	4 (30.8)
W0, mm	3.51 ± 0.70	3.42 ± 0.60	a0.720
W1, mm	8.93 ± 0.93	7.96 ± 0.71	a0.005∗∗
W1-W0, mm	5.42 ± 0.76	4.54 ± 0.59	a0.002∗∗

^aIndependent samples t-test; ^bYates' continuity correction; ^∗∗ P < 0.01.

GBR, guided bone regeneration; RBG, ramus block bone graft; W0, presurgical bone width; W1, bone width after healing; W1-W0, bone gain after healing.