Research Article
Chemical Changes of Enamel Produced by Sodium Fluoride, Hydroxyapatite, Er:YAG Laser, and Combined Treatments
Table 3
Atomic percentages (at%) of Ca and P and Ca/P ratio of the permanent tooth enamel surface analyzed before treatment and after treatment by EDS (mean-standard deviation).
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BT: before treatment; AT: after treatment; S: significant difference; NS: no significant difference. Element comparison by group before and after treatment. Capital letters in a column compare between values of different groups before and after treatment. First column: before treatment; second column: after treatment. The same capital letters mean that they do not differ statistically. |