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

Table 2

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

Parameters	Groups	Means ± SDs (day 7)	Means ± SDs (day 28)
	RCTR	−1.29 ± 0.70^Aa	−2.48 ± 0.33^Ab
	RC	−0.10 ± 1.05^Bc	−1.43 ± 0.31^Bd
	RD	−0.56 ± 0.22^Be	−2.08 ± 0.40^Cf
	BCTR	−1.30 ± 1.29^Ag	−2.58 ± 0.45^Ah
	BC	−0.43 ± 0.50^Bi	−1.43 ± 0.24^Bj
	BD	−0.52 ± 0.21^Bk	−1.99 ± 0.27^Cl
	RCTR	0.60 ± 0.59^Ca	0.96 ± 0.67^Da
	RC	0.19 ± 0.12^Db	0.43 ± 0.17^Ec
	RD	0.29 ± 0.18^Dd	0.88 ± 0.69^De
	BCTR	0.81 ± 0.20^Cf	0.99 ± 1.56^Dg
	BC	0.31 ± 0.32^Dh	0.52 ± 0.21^Eh
	BD	0.44 ± 0.13^Di	1.15 ± 0.22^Dj
	RCTR	4.00 ± 2.55^Ea	6.98 ± 0.64^Fb
	RC	1.38 ± 1.88^Fc	2.37 ± 1.24^Gc
	RD	2.28 ± 1.17^Fd	5.94 ± 0.65^He
	BCTR	4.62 ± 1.41^Ef	7.01 ± 0.43^Fg
	BC	2.03 ± 0.54^Fh	4.01 ± 0.62^Gi
	BD	1.87 ± 1.62^Fj	5.89 ± 0.59^Hk

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).