An In Vitro Comparison of Clinpro™ XT and Duraphat Varnish for Protecting Teeth from Discoloration during Orthodontic Treatment

Table 3

Comparison of the means and standard deviations (SDs) of the values of each group on days 7 and 28.

	Groups	Means ± SDs (day 7)	Means ± SDs (day 28)
	RCTR	4.90 ± 0.87^Aa	7.51 0.59^Ab
	RC	2.34 ± 0.85^Bc	2.91 0.97^Bc
	RD	2.41 ± 1.09^Bd	6.40 0.68^Ce
	BCTR	5.05 ± 1.30^Df	7.55 0.45^Dg
	BC	2.00 ± 0.32^Eh	4.30 0.60^Ei
	BD	2.48 ± 0.53^Ej	6.33 0.58^Fk

① RCTR: resin control group; RC: resin Clinpro group; RD: resin Duraphat group; BCTR: bracket control group; BC: bracket Clinpro group; BD: bracket Duraphat group. ② Different uppercase letters in the same column indicate significant differences for the different groups on day 7 or 28 ( < 0.05). Different lowercase letters in the same row indicate significant differences among the different time points in the same groups ( < 0.05), whereas the same letter in a column or in a row indicates no significant differences ( > 0.05).