Abstract

Aim: This study aimed to evaluate the effects of the conventional etching and primer (CEP) method and
 the self-etching primer (SEP) method on demineralization while rebonding the brackets.
 Material and Methods: Sixty extracted maxillary first premolar teeth were divided into 4 groups, each
 containing 15 teeth. The teeth in Groups 1 and 2 were bonded using CEP, and those in Groups 3 and
 4 were bonded using SEP. After the first bonding, adjacent surfaces of the brackets were measured
 using DIAGNOdent pen, and demineralization values were recorded (T0). The teeth were kept in a
 demineralization solution for 15 days in a 37°C incubator. Then, all brackets were debonded. The teeth
 in Groups 1 and 3 were rebonded using CEP, and those in Groups 2 and 4 were rebonded using
 SEP. In this way, via the enamel surface conditioning prior the first bonding and rebonding, the groups
 were constructed as; Group 1 (CEP-CEP), Group 2 (CEP-SEP), Group 3 (SEP-CEP) and Group 4
 (SEP-SEP). The teeth were kept in the same solutions by same way (T1). The Kolmogorov-Smirnov
 test was used to determine whether or not the data were normally distributed, the Wilcoxon test was
 used for comparisons within groups, and the Mann-Whitney U and Kruskal-Wallis tests were used for
 comparisons between groups. p

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