Non-surgical treatment of peri-implantitis with and without erythritol air-polishing a 12-month randomized controlled trial

Table 3 Patient mean scores (± SEM) for Visual Analogue Scale (VAS) 1 and 2 at baseline and 3, 6, 9, and 12 months and mean changes (Δ) from baseline and 6 months

	Baseline	p	3 Months	p	6 Months	p	9 Months	p	12 Months	p	Δ_0-6		Δ_6-12		Δ_0-12
	Mean ± SEM		Mean ± SEM		Mean ± SEM		Mean ± SEM		Mean ± SEM		Mean ± SEM	p	Mean ± SEM	p	Mean ± SEM	p
VAS 1
Test	8.8 ± 0.49		9.3 ± 0.15		9.3 ± 0.16		9.3 ± 0.13		9.6 ± 0.11		0.52 ± 0.52	0.906	0.23 ± 0.13	0.568	-0.75 ± 0.50	0.695
Control	9.4 ± 0.15		9.5 ± 0.10		9.5 ± 0.16		9.6 ± 0.10		9.5 ± 0.14		0.10 ± 0.11	0.933	0.25 ± 0.17	0.999	0.12 ± 0.16	0.963
Difference	-0.6 ± 0.51	0.260	-0.2 ± 0.18	0.405	-0.2 ± 0.23	0.509	-0.3 ± 0.17	0.113	0.1 ± 0.18	0.767	0.43 ± 0.53	0.423	0.20 ± 0.22	0.345	0.63 ± 0.52	0.233
VAS 2
Test	7.4 ± 0.56		8.1 ± 0.41		8.1 ± 0.33		8.0 ± 0.33		8.8 ± 0.25		-0.61 ± 0.52	0.843	0.79 ± 0.31	0.208	1.39 ± 0.53	0.181
Control	9.1 ± 0.20		9.1 ± 0.20		9.0 ± 0.24		9.1 ± 0.20		8.7 ± 0.21		0.07 ± 0.20	0.998	-0.33 ± 0.26	0.812	-0.39 ± 0.28	0.758
Difference	-1.7 ± 0.59	0.006	-1.0 ± 0.46	0.040	-1.0 ± 0.41	0.018	-1.0 ± 0.36	0.009	0.09 ± 0.33	0.785	0.67 ± 0.55	0.225	1.10 ± 0.40	0.008	1.78 ± 0.60	0.005

ISSN: 1472-6831