Study Jaw Type of implant Implant length
and diameter
(mm) 		Loading
time 		Implants (n) Dropout
(n) 		Technique of augmentation Type of bone graft Prosthesis type
SIG LIG SIG LIG
Bernardi et al. [28] Lower IM Macon® (SIG)/Conical Active® (LIG) 6 x 4.1 10 x 3.9 NR 86 84 - Sandwich technique OsteoBiol® Sp-Block (Tecnoss s.r.l.; Giaveno, Italy) Single crown
Felice et al. [29] Upper and Lower Southern Implants® pure titanium 6 x 4 ≥ 10 x 4 8 months 80 91 8 patients Sandwich technique Mandible: OsteoBiol® Sp-Block (Tecnoss s.r.l.) equine bone blocks Single crown
Lateral window technique Maxilla: OsteoBiol® Gen-Os (Tecnoss s.r.l.) granules of porcine bone
Felice et al. [30] Lower BIOMET 3i® 6.6 x 4 9.6, 11.2, 12.6 and 14.6 x 4 8 months 60 61 8 patients Vertical augmentation Particulate form bone graft autogenous Bio-Oss® (Geistlich Pharma AG; Wolhusen, Switzerland) NR
Bechara et al. [31] Upper NR 6 x 4 to 8 10, 11.5, 15 or 15 x 4 to 8 4 months 45 45 1 patient Lateral window technique Xenograft bone graft, collagenated porcine particulate bone graft. OsteoBiol® Gen-Os® (Tecnoss Dental, Turin, Italy) Single crown or fixed partial dentures
Nielsen et al. [32] Upper Astra Tech Implant System™ 6 13 27 weeks 20 17 3 patients Lateral window technique Autogenous and xenograft (bovine) (Bio-Oss® - Geistlich Pharma AG) Single crown
Guljé et al. [33] Upper Astra Tech Implant System™ 6 11 16 weeks 21 20 8 patients Lateral window technique Autogenous and proteinized bovine bone mineral (Bio-Oss® - Geistlich Pharma AG) Single crown
Thoma et al. [34] Upper Astra Tech Implant System™ 6 x 4 11, 13, 15 x 4 6 to 7 months 67 70 30 patients Lateral window technique Particulated bovine bone material (Bio-Oss® granules - Geistlich Pharma AG) Single crown
Shah et al. [35] Upper and lower MIS Seven™ 6 longer 10 longer 3 or 6 months 25 25 7 patients Vertical augmentation Alloplastic bone graft composed of hydroxyapatite and β-tricalcium phosphate (4Bone® - Biomatlante - Advanced Medical Solutions; Vigneux de Bretagne, France) NR
Bolle et al. [36] Upper and lower twinKon® Universal® Profile 4 ≥ 10 x 4, 4.5 4 months 87 80 3 patients Sandwich technique Mandible: OsteoBiol® Sp-Block (Tecnoss s.r.l.) equine bone blocks NR
Lateral window technique Maxilla: OsteoBiol® Gen-Os (Tecnoss s.r.l.) granules of porcine bone

SIG = short implants group; LIG = longer implants group; n = number; NR = not reported.