International Journal of Dentistry

Research Article

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

Table 2

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


Variables	Specimens	Toothpastes	Mean ± SD	Min	Max	P value

ΔL	Enamel N = 18	Charcoal free (Colgate® Max Fresh)	12.44 ± 1.24	0.47	17.91	0.001^†
	Enamel N = 18	Charcoal (Colgate® MAX WHITE)	24.56 ± 2.57	5.63	30.21	0.001^†
	Composite N = 18	Charcoal free (Colgate® Max Fresh)	0.67 ± 0.65	−0.31	2.01	0.021^‡
	Composite N = 18	Charcoal (Colgate® MAX WHITE)	1.4 ± 1.08	−0.51	3.64	0.021^‡

Δa	Enamel N = 18	Charcoal free (Colgate® Max Fresh)	−1.77 ± 1.45	−4.28	0.19	0.0001^‡
	Enamel N = 18	Charcoal (Colgate® MAX WHITE)	−3.86 ± 1.7	−7.69	−1.13	0.0001^‡
	Composite N = 18	Charcoal free (Colgate® Max Fresh)	−0.29 ± 0.44	−1.08	0.72	0.025^†
	Composite N = 18	Charcoal (Colgate® MAX WHITE)	−0.61 ± 0.39	−1.6	−0.2	0.025^†

Δb	Enamel N = 18	Charcoal free (Colgate® Max Fresh)	−1.24 ± 1.47	−3.67	1.4	0.009^‡
	Enamel N = 18	Charcoal (Colgate® MAX WHITE)	−2.95 ± 2.12	−5.83	0.39	0.009^‡
	Composite N = 18	Charcoal free (Colgate® Max Fresh)	−0.19 ± 0.33	−0.72	0.4	0.002^‡
	Composite N = 18	Charcoal (Colgate® MAX WHITE)	−0.93 ± 0.82	−3.21	0.24	0.002^‡

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