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Table 1 Radiographic evaluation at the mesio-distal aspects. Mean values ± standard deviations and medians (25%;75% percentiles) of the two standard implants (3.8 mm and 4.25 mm) and of the two respective narrow implants (3.3 mm and 3.3 mm) at the time of treatment and after 5 months of healing. Differences (Δ) between periods and p values (p < 0.05) are also reported. n = 6

From: Peri-implantitis at implants with different diameters: a pilot study in dogs

Data in millimeter Standard Narrow
  M-B M-C V-defect H-GAP M-B M-C V-defect H-GAP
Treatment 2.2 ± 1.0 1.8 (1.5;3.0) 1.2 ± 1.01.2 (0.8;2.1) 0.9 ± 0.60.8 (0.5;1.3) 0.5 ± 0.40.5 (0.2;0.7) 3.2 ± 0.43.0 (3.0;3.2) 1.6 ± 0.61.7 (1.1;2.1) 1.5 ± 0.61.9 (1.2;1.9) 0.8 ± 0.40.7 (0.5;1.0)
5 months after treatment 1.7 ± 0–9 1.7 (1.2;2.3) 1.4 ± 1.01.5 (0.5;2.2) 0.3 ± 0.3 0.1 (0.1;0.3) 0.1 ± 0.10.0 (0.0;0.1) 2.3 ± 0.42.5 (2.3;2.5) 1.8 ± 0.41.8 (1.6;2.1) 0.5 ± 0.60.4 (0.0;0.8) 0.2 ± 0.20.1 (0.0;0.4)
p standard vs narrow at treatment 0.116 0.463 0.249 0.249     
p treatment vs. 5 months after treatment 0.173 0.249 0.046 0.043 0.028 0.249 0.028 0.028
Δ treatment and 5 months after treatment 0.5 ± 0.6 0.4 (0.3;0.9) − 0.2 ± 0.4–0.3 (− 0.4;− 0.1) 0.7 ± 0.5 0.7 (0.5;0.9) 0.4 ± 0.4 0.4 (0.2;0.5) 0.9 ± 0.4 0.8 (0.6;1.2) − 0.2 ± 0.3–0.2 (− 0.4;0.1) 1.1 ± 0.5 1.1 (0.7;1.2) 0.6 ± 0.4 0.5 (0.5;0.7)
p standard vs. narrow 0.249 0.917 0.599 0.600     
  1. Δ = difference; M = coronal margin of the rough surface; B = most coronal contact of the bone to the implant surface; C = top of the marginal bone crest; V-defect = vertical defect; H-GAP = horizontal defect