Table 3.

Peri-implant marginal bone loss between groups of implants at different time periods, in mm (implant level).

	Baseline, 4 months	Baseline, 1 year
	N ∗; mean (SD); median; CI 95%	N ∗; mean (SD); median; CI 95%
Overall	39; 0.40 (±0.20); 0.35; 0.34–0.46	39; 0.43 (±0.15); 0.44; 0.39–0.47
Healed sites	30; 0.42 (±0.21); 0.36; 0.35–0.49	30; 0.43 (±0.15); 0.44; 0.38–0.48
Extraction sockets	9; 0.35 (±0.17); 0.34; 0.24–0.46	9; 0.41 (±0.17); 0.44; 0.30–0.52

N ^∗ = number of the surviving implants.