A 12-Week Assessment of the Treatment of White Spot Lesions with CPP-ACP Paste and/or Fluoride Varnish

Table 5

Mean pre- and posttreatment LF measurements, standard deviations, statistics, and significance levels at which the null hypothesis is rejected for the one-tailed -test.

Treatment regime	Control	FV	CPP-ACP	CPP-ACP-FV
Pretreatment mean (standard deviation)	16.9 (2.2)	16.9 (2.1)	16.7 (1.6)	16.5 (2.0)
Posttreatment mean (standard deviation)	6.42 (3.1)	6.18 (3.0)	3.16 (1.3)	3.95 (2.6)
-critical ( = 0.05)	1.672	1.687	1.685	1.675
-calculated	15.56	13.78	30.24	19.95
Significance level ()	<0.001	<0.001	<0.001	<0.001