Table 1.
Mean (SD) of Colour Parameters of Dentine After Treatments
| Group | p value | Bonferroni | |||
|---|---|---|---|---|---|
| 1 (SDF) | 2 (PEG-AgNPs+NaF) | 3 (Water) | |||
| L* | 16.1 (0.7) | 92.4 (8.0) | 93.1 (8.0) | <0.001 | 1< 2, 3 |
| C | 7.6 (0.5) | 40.9 (6.2) | 42.9 (6.5) | <0.001 | 1< 2, 3 |
| h | 66.7 (1.3) | 90.1 (2.5) | 90.2 (1.9) | <0.001 | 1< 2, 3 |
| a* | 3.0 (0.2) | −0.0 (1.6) | −0.2 (1.4) | N/A | N/A |
| b* | 7.0 (0.5) | 40.9 (6.2) | 42.9 (6.5) | N/A | N/A |
| ∆E* | 85.0 | 2.2 | N/A | N/A | N/A |
Notes: L* axis represented lightness ranged from black (0) to white (100), a* axis described red (+a*) to green (-a*), b* axis represented yellow (+b*) to blue (-b*) h means hue, and C means chroma, ∆E* was the difference of colour calculated based on the equation 
.
Abbreviations: SDF, silver diamine fluoride; PEG-AgNPs polyethylene glycol-coated silver nanoparticles, N/A, not applicable.