Abstract
The purpose of this in vitro study was to determine whether the vicinity of root dentine that had been restored with fluoride-releasing materials was at reduced risk for erosive/abrasive wear compared to root dentine restored with a non-fluoride-containing material. According to a randomized complete block design, standardized cavities prepared on the surface of 150 bovine root dentine slabs were restored with glass-ionomer cement, resin-modified glass ionomer, polyacid-modified resin composite, fluoride-containing or conventional composite. Specimens were coated with two layers of an acid-resistant nail varnish exposing half of the dentine surface and half of the restoration. Subsequently, specimens were either eroded in an acidic drink or left uneroded, then exposed to artificial saliva and abraded in a toothbrushing machine. Wear depth in the vicinity of restorations was quantified by a stylus profilometer, based on the nonabraded areas surrounding the erosion/abrasion region. Two-way ANOVA did not demonstrate significant interaction between restoratives and eroded-uneroded dentine (p = 0.5549) nor significant difference among restorative materials (p = 0.8639). Tukey’s test ascertained that the wear depth was higher for eroded than for uneroded groups. Fluoride-releasing materials seemed to negligibly inhibit wear in the vicinity of restored root dentine subjected to erosive/abrasive challenges.
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The authors gratefully acknowledge FAPESP (grant #02/13492-4) for providing financial assistance in the form of a scholarship to SJD and CNPQ (grant #471564/2003-6). The companies Dentsply Caulk and KG Sorensen are thanked for donating some of the materials used in this study.
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Turssi, C.P., Hara, A.T., Domiciano, S.J. et al. Study on the potential inhibition of root dentine wear adjacent to fluoride-containing restorations. J Mater Sci: Mater Med 19, 47–51 (2008). https://doi.org/10.1007/s10856-007-3140-4
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DOI: https://doi.org/10.1007/s10856-007-3140-4