Table 4 The color differences (ΔE00) after toothbrushing or bleaching (Difference between T2 and T1).

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

ΔE00 before and after bleaching

Tooth Brushing

ΔE00

Bleaching Pen

ΔE00

Bleaching Mouthwash

ΔE00

P value

Compared to Acceptability threshold

Restorations at cervical 1/3

1.1aA

4.9bA

4.5bA

0.0001*

Above acceptability threshold except the toothbrushing with restorations (minimal color change)

Teeth at middle 1/3

8.8aB

25bB

25.9bB

0.0001*

P value

0.0001*

0.0001*

0.0001*

 
  1. *Significant difference; significant (P < 0.05). Different small letters in the same row indicated a significant difference. Different capital letters in the same column indicated a significant difference.
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