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† |
| Charcoal (Colgate® MAX WHITE) |
24.56 ± 2.57 | 5.63 | 30.21 | |||
| Composite N = 18 |
Charcoal free (Colgate® Max Fresh) |
0.67 ± 0.65 | −0.31 | 2.01 | 0.021‡ | |
| Charcoal (Colgate® MAX WHITE) |
1.4 ± 1.08 | −0.51 | 3.64 | |||
|
| ||||||
| Δa | Enamel N = 18 |
Charcoal free (Colgate® Max Fresh) |
−1.77 ± 1.45 | −4.28 | 0.19 | 0.0001‡ |
| Charcoal (Colgate® MAX WHITE) |
−3.86 ± 1.7 | −7.69 | −1.13 | |||
| Composite N = 18 |
Charcoal free (Colgate® Max Fresh) |
−0.29 ± 0.44 | −1.08 | 0.72 | 0.025† | |
| Charcoal (Colgate® MAX WHITE) |
−0.61 ± 0.39 | −1.6 | −0.2 | |||
|
| ||||||
| Δb | Enamel N = 18 |
Charcoal free (Colgate® Max Fresh) |
−1.24 ± 1.47 | −3.67 | 1.4 | 0.009‡ |
| Charcoal (Colgate® MAX WHITE) |
−2.95 ± 2.12 | −5.83 | 0.39 | |||
| Composite N = 18 |
Charcoal free (Colgate® Max Fresh) |
−0.19 ± 0.33 | −0.72 | 0.4 | 0.002‡ | |
| Charcoal (Colgate® MAX WHITE) |
−0.93 ± 0.82 | −3.21 | 0.24 | |||
Statistically significant at P < 0.05. †Mann–Whitney U test. ‡Independent sample t-test.