Table 2.

Clinical characteristics of the implants with healthy peri-implant gingiva and with peri-implantitis

	Healthy	Peri-implantitis	Differences per group
Mean PPD in mm	2.72 ± 0.59	5.15 ± 0.68	*
mPI	0.96 ± 1.03	1.25 ± 1.15	n.s
0 (%)	46.3	37.7
1 (%)	18.5	16.7
2 (%)	27.8	29.2
3 (%)	7.4	16.7
mGI	0.63 ± 0.92	2.71 ± 0.46	*
0 (%)	63.0	0
1 (%)	14.8	0
2 (%)	18.5	29.2
3 (%)	3.7	70.8
PISF	91.7 ± 50.3	83.9 ± 43.1	n.s.

Mean ± s.d. or %, as indicated.

*p < 0.001.

Mann-Whitney U-test for evaluating differences in PPD, mPI and mGI between groups.

Student t-test for evaluating differences in PISF between groups.

n.s. = nonsignificant.

PPD = probe pocket depth; mPI = modified plaque index; mGI = modified gingival index; PISF = peri-implant sulcus fluid.