Study Marginal bone loss
(mm) 		P-value Probing depth
(mm) 		P-value Survival rate
(%) 		Biological complications
(n/%) 		Prosthetic complications
(n)
OAOT Control OAOT Control OAOT Control OAOT Control OAOT Control
Mean (SD) Mean (SD) Mean (SD) Mean (SD)
Praça et al. [17] -0.18 (0.12) -0.13 (0.13) 0.792 1.01 (0.19) 1.02 (0.06) 0.96 100 100 NR NR NR NR
D'Avenia et al. [18] 0.11 (0.3) 0.48 (0.73) 0.012 NR NR NR 100 92.9 0 5 1 9
Ríos-Santos et al. [19] 0.36 (0.79) 0.48 (0.71) > 0.05 NR NR NR 99.1 97.9 NR NR NR NR
Hamudi et al. [20] 0.35 (0.69) 0.57 (0.8) 0.005 NR NR NR 100 100 38.1% 41.9% NR NR
Moreira et al. [21] 0.14 (0.21) 0.21 (0.27) 0.33 NR NR NR 100 100 NR NR NR NR
Calatrava et al. [22] -0.53 (0.54) -0.01 (0.55) 0.008 2.56 (0.12) 2.44 (0.12) 0.486 94.7 100 0 0 NR NR
Sanz-Sánchez et al. [23] 0.534 (0.83) 0.97 (0.78) 0.063 2.99 (0.94) 2.92 (0.89) 0.753 96.6 100 12 PIM; 1 PI 13 PIM; 0 PI NR NR

n = number; OAOT = one-abutment-one-time; NR = not recorded; PIM = peri-implant mucositis, PI = peri-implantitis.