Correlation between antioxidant activity and bonding strength on bleached enamel

Figures & data

Figure 1. Fracture mode analysis according to experimental groups.

Table 1. Means and standard deviation of bond strength (MPa).

	Antioxidants
Concentrations	Sodium ascorbate	Green tea	p Values
10%	19.58 ± 4.94 A a^d	19.65 ± 4.02 A a^d	.007
20%	18.15 ± 5.40 A ab	17.02 ± 7.8 A ab
30%	14.39 ± 4.97 A b	13.33 ± 5.4 A b^c
p Values	.625
Positive control	20.22 ± 3.68		.004
Negative control	13.15 ± 2.89^c

Means followed by similar capital letters (row) are not significantly different, when comparing the antioxidant agents within each concentration using Tukey’s test (p < .05).

Means followed by similar lower-case letters (column) are not significantly different, when comparing the different concentrations of each antioxidant using Tukey’s test (p < .05).

^c Indicates statistically significant differences between the groups treated and the positive control, using Dunnett's test (p < .05).

^d Indicates statistically significant differences between the groups treated and the negative control, using Dunnett's test (p < .05).

Table 2. Means and standard deviation of antioxidant activity percentage (%AA).

Concentration	Antioxidants
	Sodium ascorbate	Green tea
10%	96.75 ± 1.24 Aa	90.58 ± 1.84 Ba
20%	94.16 ± 7.51 Ab	91.87 ± 2.22 Ba
30%	96.37 ± 0.11 Aa	91.47 ± 0.90 Ba

Means followed by similar capital letters (row) are not significantly different, when comparing the antioxidants agents within each concentration using Tukey’s test (p<.05).

Means followed by similar lower-case letters (column) are not significantly different, when comparing the different concentrations of each antioxidant using Tukey’s test (p<.05).