Abstract
The aim of this study was to evaluate the elemental content and morphology of enamel subjected to demineralization cycles after bracket debonding, adhesive remnant removal, and application of a fluoride varnish. 125 bovine teeth were divided into five groups (n = 25): 1) Intact enamel; 2) Intact enamel + demineralization cycles (DC); 3) Enamel after adhesive removal; 4)Enamel after adhesive removal + DC; 5) Enamel after adhesive removal + Profluorid + DC. The weight percentages of calcium (Ca), phosphorous (P) and fluoride (F) were calculated using energy dispersive X-ray spectroscopy (EDX). Samples were observed under scanning electron microscopy (SEM). Data were analyzed using Kruskal-Wallis and Mann-Whitney test. The weight percentages of Ca and P in Group 1 were significantly higher than Groups 2, 4, and 5. The weight percentages of Ca and P in Group 2 were significantly higher than Groups 4 and 5. Group 3 presented significantly higher percentages of Ca and P than Group 4. Group 5 showed a significantly higher percentage of Ca than Group 4. The presence of F was detected in Group 5. SEM images showed more signs of demineralization in Group 4 than Group 5. Fluoride varnish application may protect enamel from demineralization after bracket debonding.
Highlights
In the bracket bonding and debonding process, enamel loss is mainly due to the polishing performed before acid etching, the acid etch itself, and to the removal of adhesive remaining on the dental surface after debonding, being the procedure of removal of the adhesive which produces more surface loss[3]
This study aimed to evaluate the elemental content and morphology of enamel subjected to demineralization cycles after bracket debonding, adhesive removal, and fluoride varnish application
The aim of this study was to evaluate the elemental content and morphology of enamel subjected to demineralization cycles after bracket debonding, adhesive remnant removal, and fluoride varnish application
Summary
In the bracket bonding and debonding process, enamel loss is mainly due to the polishing performed before acid etching, the acid etch itself, and to the removal of adhesive remaining on the dental surface after debonding, being the procedure of removal of the adhesive which produces more surface loss[3]. It has been shown that the use of fluoride varnishes contributes to a reduction in the incidence of caries, and so its application is recommended as a public health measure[8,9]. In orthodontics, these varnishes have been used to prevent white spot lesions during treatments involving brackets[10], to resolve the lesions when they appear after treatment[11,12] and following interproximal enamel reduction[13,14]. This study aimed to evaluate the elemental content and morphology of enamel subjected to demineralization cycles after bracket debonding, adhesive removal, and fluoride varnish application
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