Table 2.
Degree of color variation (ΔE* and ΔE00) of stained dental enamel model from tooth bleaching formulae set #2 (L1.0 + CD20). L, CD, and CP represented limonene, coconut diethanolamide, and carbamide peroxide, respectively (p < 0.05). CP = 10–15%
| Nicotine content (mg/mL) | Before treatment | After treatment with tooth bleaching formulae | ||||||
|---|---|---|---|---|---|---|---|---|
| ΔE* | ΔE00 | set #2 + CP5 | set #2 + CP10 | set #2 + CP15 | ||||
| ΔE* | ΔE00 | ΔE* | ΔE00 | ΔE* | ΔE00 | |||
| 6 | 4.18 | 3.78 | 4.12 | 3.72 | 3.87 | 3.52 | 3.61 | 3.32 |
| 11 | 4.43 | 4.00 | 4.11 | 3.71 | 3.93 | 3.57 | 3.62 | 3.30 |
| 16 | 4.69 | 4.22 | 4.19 | 3.79 | 4.01 | 3.63 | 3.63 | 3.31 |
| 21 | 4.97 | 4.56 | 4.17 | 3.78 | 3.99 | 3.63 | 3.71 | 3.39 |