Table 2.

Bone graft augmentation versus membrane augmentation.

Outcome	Studies	Participants	Statistical method	Effect estimate
Implant failure (short term; 1–6 months)	Prosper et al. [26]	111	Risk ratio (M-H, fixed, 95% CI)	0.98 [0.06, 15.31]
Implant failure (medium term; 6–12 months)	Prosper et al. [26]	109	Risk ratio (M-H, fixed, 95% CI)	0.33 [0.01, 7.86]