TiF4 varnish protects the retention of brackets to enamel after in vitro mild erosive challenge
| Autor: | Maria Isabel Dantas de Medeiros, Fabíola Galbiatti de Carvalho, Renata Sobreira França, Hugo Lemes Carlo, Frederico Barbosa de Sousa, Rogério Lacerda dos Santos, Ricardo Dias de Castro |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Orthodontic Brackets Surface Properties Brackets Varnish Dentistry Dental bonding Statistics Nonparametric 03 medical and health sciences chemistry.chemical_compound Fluorides 0302 clinical medicine Reference Values Sodium fluoride Materials Testing Shear strength Animals Hardness Tests Dental Enamel General Dentistry Tooth Demineralization Titanium Tooth erosion Analysis of Variance Enamel paint business.industry Shear bond strength Dental Bonding Reproducibility of Results Saliva Artificial 030206 dentistry Cariostatic Agents Demineralization lcsh:RK1-715 stomatognathic diseases 030104 developmental biology chemistry visual_art lcsh:Dentistry Titanium tetrafluoride visual_art.visual_art_medium Sodium Fluoride Original Article Cattle Microscopy Polarization business Shear Strength Fluoride |
| Zdroj: | Journal of Applied Oral Science, Vol 26, Iss 0 (2018) Repositório Institucional da UFJF Universidade Federal de Juiz de Fora (UFJF) instacron:UFJF Journal of Applied Oral Science Journal of Applied Oral Science v.26 2018 Journal of applied oral science Universidade de São Paulo (USP) instacron:USP Journal of Applied Oral Science, Volume: 26, Article number: e20170222, Published: 14 MAY 2018 |
| ISSN: | 1678-7765 |
| Popis: | The effect of fluoride agents on the retention of orthodontic brackets to enamel under erosive challenge is little investigated. Objective: The aim of this study was to evaluate the effect of titanium tetrafluoride (TiF4) and sodium fluoride (NaF) agents on the shear bond strength of brackets to enamel and on the enamel microhardness around brackets under erosive challenge. Methods: Brackets were bonded to bovine incisors. Five groups were formed according to fluoride application (n=10): TiF4 varnish, TiF4 solution, NaF varnish, NaF solution and control (without application). The specimens were submitted to erosive challenge (90 s cola drink/2h artificial saliva, 4x per day for 7 days). Solutions were applied before each erosive cycle and varnishes were applied once. Vickers Microhardness (VHN) was obtained before and after all cycles of erosion and the percentage of microhardness loss was calculated. Shear bond strength, adhesive remnant index and polarized light microscopy were conducted after erosion. The data were analyzed by ANOVA, Tukey, Kruskal-Wallis and Mann-Whitney U tests (α=0.05). Results: The %VHN had no statistically significant differences among the experimental groups. However, considering the comparisons of all groups with the control group, TiF4 varnish showed the highest protection from enamel demineralization (effect size of 2.94, while the effect size for the other groups was >2.4). The TiF4 varnish group had significantly higher shear bond strength compared to other groups. There was no difference among groups for adhesive remnant index. Polarized light microscopy showed higher demineralization depth for the control group. Conclusions: Application of NaF and TiF4 agents during mild erosive challenge minimized the enamel mineral loss around brackets, however only the experimental TiF4 varnish was able to prevent the reduction of shear bond strength of brackets to enamel. |
| Databáze: | OpenAIRE |
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