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Statistical analysis for mean ± St. Deviation for the effect of bleaching protocol on colour change in ΔE
| Before bleaching | Post-bleaching | P-value | |
|---|---|---|---|
| High intensity | 5.6 ± 2.1 | 4.3 ± 2.8 | 0.267NS |
| Descending intensities | 5.6 ± 1.7 | 5.3 ± 1.8 | 0.875NS |
*: significant (p ≤ 0.05); NS: non-significant (p > 0.05).
