Abstract
ObjectivesTo evaluate quantitatively and qualitatively the changes produced to enamel after interproximal reduction and subjected to demineralization cycles, after applying a fluoride varnish (Profluorid) and a fluoride varnish containing tricalcium phosphate modified by fumaric acid (Clinpro White).Materials and methods138 interproximal dental surfaces were divided into six groups: 1) Intact enamel; 2) Intact enamel + demineralization cycles (DC); 3) Interproximal Reduction (IR); 4) IR + DC; 5) IR + Profluorid + DC; 6) IR + Clinpro White + DC. IR was performed with a 0.5 mm cylindrical diamond bur. The weight percentage of calcium (Ca), phosphorous (P) and fluoride (F) were quantified by energy-dispersive X-ray spectrometry (EDX). Samples were examined under scanning electron microscopy (SEM).ResultsThe weight percentage of Ca was significantly higher (p<0.05) in Groups 1, 2 and 5 than Groups 4 and 6. No significant differences were detected in the weight percentage of Ca between Group 3 and the other groups (p>0.05). The weight percentage of P was similar among all six groups (p>0.05). F was detected on 65% of Group 6 surfaces. SEM images of Groups 4 and 6 showed signs of demineralization, while Group 5 did not.ConclusionsProfluorid application acts as a barrier against the demineralization of interproximally reduced enamel.
Highlights
The interproximal reduction of dental enamel involves decreasing the enamel’s mesio-distal dimension through abrasion of its interproximal surfaces [1]
The objectives of the present study were: to determine by means of energy dispersive Xray spectrometry (EDX) the calcium (Ca), phosphorous (P) and fluoride (F) content of enamel after interproximal reduction subjected to cycles of demineralization, after the application of a fluoride varnish (Profluorid) and a fluoride varnish containing tricalcium phosphate modified by fumaric acid (Clinpro White), and to evaluate by means of scanning electron microscopy (SEM), the morphological changes produced in the enamel
Results obtained with Profluorid showed that its application after enamel reduction protected the dental surface against demineralization, as the weight percentage of Ca was significantly higher in this group than in IR + DC group; SEM images in the IR + Profluorid + DC group, showed enamel that had not suffered demineralization, presenting a similar appearance to images in the IR group
Summary
The interproximal reduction of dental enamel involves decreasing the enamel’s mesio-distal dimension through abrasion of its interproximal surfaces [1]. Its main objective is to create extra space to address dental overcrowding [2]. This procedure produces roughened enamel surfaces [3,4,5], which are susceptible to accumulating bacterial plaque. The reduced enamel is more vulnerable to demineralization [6]. In this context, any product that might prevent mineral loss and promote remineralization is worth investigating. Little research has looked into the use of remineralizing agents following interproximal reduction procedures and the results remain controversial
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