Efficacy of toothpastes in the prevention of erosive tooth wear in permanent and deciduous teeth
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To evaluate the erosive preventive effect of toothpastes in permanent (PT) and deciduous teeth (dt).
Enamel samples were divided into five groups (n = 20): G1: placebo toothpaste; G2: NaF toothpaste; G3: AmF-NaF-SnCl2 anti-erosion toothpaste; G4: SnF2−toothpaste; and G5: NaF anti-erosion toothpaste for children. The samples were exposed to five erosion-abrasion cycles (artificial saliva incubation; 3 min in 1% citric acid; 2 min in slurry, toothbrush abrasion, 50 strokes, 200 g). Surface microhardness (SMH), surface specular reflection intensity (SRI), and cumulative surface loss (CSL) were measured. Comparisons among toothpastes were evaluated using Kruskal-Wallis tests and comparisons between PT and dt were evaluated using Wilcoxon’s rank sum test.
G1 exhibited significantly lower SMH values in PT than the other toothpastes (p < 0.05), with no significant differences among the others groups. In dt, G1 and G4 exhibited significantly different values than the other groups (p < 0.05). G4 exhibited lower values of SRI in both types of teeth. Deciduous teeth presented significantly higher SRI than PT (p < 0.05), except for G3. Deciduous teeth generally presented higher CSL than PT, except for G3.
Deciduous teeth were more prone to mineral loss than permanent teeth. G5 exhibited better efficacy for both teeth, while G3 exhibited a better preventive effect only for deciduous teeth.
Erosive tooth wear prevalence in children is growing and deciduous teeth are more susceptible than permanent teeth. Considering this, it is important to know the preventive effect of different toothpastes in an initial erosion-abrasion model.
KeywordsErosive tooth wear Permanent teeth Deciduous teeth Tooth erosion Tooth wear Toothpaste
The authors appreciate the support of the CAPES Foundation (Ministry of Education of Brazil) for the PhD student scholarship. We are grateful to G. Fischer and Prof. J. Hüsler from the Institute of Mathematical Statistics and Actuarial Science, University of Bern, for all statistical analyses. The toothpastes used in the present study were provided by GABA-Colgate and GlaxoSmithKline. We declare that the funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. All authors were involved in designing the experiments, critical analysis of the results, and writing the paper. Data collection was performed by CMA. In addition, the authors are very grateful to Barbara Beyeler, Brigitte Megert, Isabel Hug, and Samuel Furrer, members of the Department of Preventive, Restorative and Pediatric Dentistry, University of Bern.
The authors appreciate the support of the CAPES Foundation (Ministry of Education of Brazil) for the PhD student scholarship. The toothpastes used in the present study were provided by GABA-Colgate and GlaxoSmithKline. We declare that the funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Compliance with ethical standards
Conflict of interest
Assunção CM declares that he has no conflict of interest. Lussi A declares that he has no conflict of interest. Rodrigues JA declares that he has no conflict of interest. Carvalho TS declares that he has no conflict of interest.
This article does not contain any studies with human participants or animals performed by any of the authors. The present experiment was carried out in accordance with the approved guidelines and regulations of the local ethical committee (Kantonale Ethikkommission: KEK).
The responsible for the children were informed about the use of the teeth for research purposes and informed consent was obtained from all individual participants included in the study.
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