American Journal of Orthodontics and Dentofacial Orthopedics
Original articleIn-vivo effects of fluoridated antiplaque dentifrice and bonding material on enamel demineralization adjacent to orthodontic appliances
Section snippets
Material and methods
This study was approved by the Ethical Committee on Research of the Faculty of Dentistry Araraquara, Araraquara, SP, Brazil Fourteen orthodontic patients, aged 11 to 17 years, whose maxillary premolars were to be extracted, were selected for this research. Only patients with low caries experience (maximum of 4 restored occlusal surfaces) and without active caries lesions were included. The premolars used were also free of intrinsic stains and cracks in the enamel.
The split-mouth design was used
Results
ANOVA of the data for the occlusal region showed statistically significant effects for the factors material, position, and depth, and for the interactions material*position, dentifrice*depth, and material*depth (Table I). The effects of the dentifrice and the material*dentifrice interaction were not statistically significant (P = .3674 and .7381, respectively). For the interaction material*position, the enamel microhardness values in the positions 0, 100, and 200 of the bases bonded with resin
Discussion
In this study, an in-vivo model was used, in which dental bands were specially made to create a niche for plaque accumulation at the buccal surfaces of premolars to be extraction for orthodontic reasons.17 This model had several advantages: the development of the caries lesions was studied in vital teeth; minimal patient cooperation was required; no special diet was required; and, because the protected enamel surface allowed the accumulation of thick plaque, no other site was at risk of caries
Conclusions
The data suggest that, if the bonding material is a composite, caries reduction adjacent to orthodontic material with a fluoridated antiplaque dentifrice would be better than with the fluoridated-only dentifrice. However, this effect seems irrelevant when an ionomeric material is used.
We thank Dr Raimundo Rosendo Prado, Jr, Federal University of Piauí, for reviewing the English version of this article.
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Based on a thesis submitted by the first author to the Faculty of Dentistry of Araraquara, State University of São Paulo, Brazil, in partial fulfillment of the requirements for the doctorate degree in Pediatric Dentistry. The third author, authorized by the University of Campinas, was a scientific consultant of Kolynos do Brasil during this study.