Table 4.

Ca/P atomic ratios (mean ± SD). In columns, identical superscript lowercase letters represent no statistical differences (two-way ANOVA followed by an RM Student–Newman–Keuls test) among tested solutions (P ≥ 0.05). In the horizontal rows, identical superscript uppercase letters represent no statistical differences (one-way ANOVA for repeated measures followed by an RM Student–Newman–Keuls test) among evaluation times (P ≥ 0.05).

Treatments	Smear Layer	T0	24 Hours	2 Months
1% EDTA	1.35 ± 0.01 Aa	1.43 ± 0.06 Ba	1.41 ± 0.02 Ba	1.31 ± 0.04 Aa
10% EDTA	1.38 ± 0.01 Aa	1.41 ± 0.04 Aa	1.36 ± 0.01 Bb	1.41 ± 0.01 Ab
17% EDTA	1.32 ± 0.02 Ab	1.47 ± 0.01 Bb	1.40 ± 0.02 Ca	1.40 ± 0.03 Cb
10% Citric acid	1.38 ± 0.03 Aa	1.33 ± 0.01 Bc	1.43 ± 0.02 Ca	1.45 ± 0.02 Cc
Control	1.27 ± 0.01 Ac	1.42 ± 0.00 Ba	1.43 ± 0.01 Ba	1.40 ± 0.01 Bb