Table 1. Microhardness data (mean±standard deviation) and results of the statistical analysis.

Toothpaste	Waiting Time	VHNdemin	∆VHN	Statistical Comparisons
SDS	0 minutes	49.9±16.3	9.0±15.2	D*
	15 minutes	49.6±15.2	14.8±18.7	CD
	30 minutes	49.4±14.1	27.6±23.9	C
	60 minutes	49.4±13.2	13.8±12.5	CD
	Control	49.4±13.2	19.1±15.0	C
CAPB	0 minutes	49.4±13.1	53.1±34.5	B
	15 minutes	49.3±13.1	65.2±37.1	AB
	30 minutes	49.4±13.0	62.6±28.7	A
	60 minutes	49.4±13.0	70.5±35.7	AB
	Control	49.4±13.5	81.5±23.9	A

^*Different letters, in descending order from A (most remineralization) to D (least remineralization), indicate significant differences in ∆VHN values between study groups.

Pair-wise comparisons between treatments were made using Fisher's Protected Least Significant Differences.