Evaluating the Effect of Active Charcoal-Containing Toothpaste on Color Change, Microhardness, and Surface Roughness of Tooth Enamel and Resin Composite Restorative Materials

Table 3

Mean, standard deviation (SD), minimum and maximum of color change after using the toothpastes.

Variable	Specimens	Toothpastes	Mean ± SD	Min	Max	P value
ΔE	Enamel; N = 18	Charcoal free; (Colgate® MAX Fresh)	7.49 ± 5.02	0.71	18.23	^†
		Charcoal; (Colgate® Max WHITE)	17.83 ± 16.9	5.76	31.4
	Composite; N = 18	Charcoal free; (Colgate® MAX Fresh)	0.96 ± 0.93	0.15	2.2	^‡
		Charcoal; (Colgate® Max WHITE)	1.94 ± 1.2	0.46	5.11

Statistically significant at . ^†Mann–Whitney U test. ^‡Independent sample t-test.