. 2020 Jun 22;10:10016. doi: 10.1038/s41598-020-66733-z

Table 3.

Initial, final and variation of Mean Roughness (%) after bleaching procedures (Mean ± SD).

Group	Mean Roughness (Ra)
Group	Initial*	Final*	Δ Ra (%)^¶
Carbamide peroxide	^A 0.50 ± 0.06^a (95% CI 0.463 to 0.537)	^B 1.17 ± 0.09^a (95% CI 1.11 to 1.23)	131.69 ± 11.3^c
Bromelain	^A 0.51 ± 0.16^a (95% CI 0.411 to 0.609)	^B 0.88 ± 0.22^b (95% CI 0.744 to 1.02)	96.86 ± 9.8^bc
Ficin	^A 0.47 ± 0.08^a (95% CI 0.42 to 0.52)	^B 0.80 ± 0.08^b (95% CI 0.75 to 0.85)	71.39 ± 14.9^bc
Papain	^A 0.44 ± 0.02^a (95% CI 0.428 to 0.452)	^B 0.52 ± 0.04^c (95% CI 0.495 to 0.545)	17.21 ± 4.8^ab
Negative control	^A 0.53 ± 0.14^a (95% CI 0.443 to 0.617)	^A 0.60 ± 0.07^c (95% CI 0.557 to 0.643)	2.55 ± 1.6^a

*Data analyzed through a Two-Way Repeated Measures ANOVA test. Different uppercase letters indicate statistically significant differences in the same row (p < 0.05). Different lowercase letters indicate statistically significant differences in the same column (p < 0.05). ^¶Data analyzed through a One-Way ANOVA test. Different lowercase letters indicate statistically significant differences (p < 0.05).