| Treatment group | Control group |
---|
∆E1a | 9.99 ± 6.98a,A | 5.43 ± 5.78b,B |
∆E2a | 11.3 ± 8.99a,A | 3.75 ± 4.77b,B |
∆E3a | 11.12 ± 7.66a,A | 4.94 ± 5.56b,B |
∆E4a | 11.54 ± 7.13a,A | 4.53 ± 5.59b,B |
- The Kruskal–Wallis test statistic and independent t-test were used. Lower case letters indicate in-group evaluation between rows; capital letters indicate evaluation between the columns. The same letters indicate that there is no statistically significant difference (p > 0.05), and different letters indicate that there is a statistically significant difference (p < 0.05)
- ∆E1a: Colour difference between before treatment and immediately after treatment
- ∆E2a: Colour difference between before treatment and 1 month after treatment
- ∆E3a: Colour difference between before treatment and 3 months after treatment
- ∆E4a: Colour difference between before treatment and 6 months after treatment