Table 3 The color differences (ΔE00) after staining (Difference between T1 and T0).

From: Assessment of toothbrushing, bleaching pen and bleaching mouthwash in removing stains from tooth structure and single-shade resin composite

ΔE00 before and after staining

ΔE00

Compared to the Acceptability threshold

Restorations at cervical 1/3

8.3

Above acceptability threshold

Teeth at middle 1/3

23.8

P value

0.0001*

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