Table 3.

Means, standard deviations, and statistical comparisons of the bacterial counts (log 10).

Bacteria	Group	n	T0		T1		T2		T3		P value*
			Mean	SD	Mean	SD	Mean	SD	Mean	SD	T0–T1	T0–T2	T0–T3	T1–T2	T1–T3	T2–T3
Pg	VFR	16.00	9.96	0.65	9.31	0.52	9.19	0.54	9.31	0.54	0.01*	0.01*	0.01*	0.45	0.56	0.36
	HR	16.00	9.70	0.64	9.16	0.52	8.99	0.48	8.90	0.56	0.04*	0.02*	0.02*	0.47	0.54	0.38
	LR	16.00	10.15	0.72	9.37	0.65	9.29	0.66	9.24	0.63	0.01*	0.01*	0.02*	0.56	0.49	0.23
	P value		0.17		0.55		0.32		0.02#
Aa	VFR	16.00	12.72	0.41	12.01	0.42	11.82	0.35	12.01	0.46	0.01*	0.01*	0.01*	0.32	0.45	0.62
	HR	16.00	12.81	0.39	12.11	0.49	11.79	0.43	11.36	0.50	0.02*	0.01*	0.01*	0.28	0.02*	0.07
	LR	16.00	13.18	0.49	12.04	0.47	11.80	0.47	11.82	0.59	0.01*	0.01*	0.01*	0.54	0.46	0.61
	P value		0.46		0.82		0.97		0.03#

VFR, vacuum-formed retainer; HR, Hawley retainer; LR, Lingual retainer.

*Bonferroni multiple comparison test result (intragroup comparisons), Significant differenc.

^#One-way analysis of variance (ANOVA) test result (intergroup comparison), Significant difference.