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Comparison of the effect of stannous fluoride and sodiumfluoride on surface roughness of Silorane andmethacrylate based restorative material using lightpolarizing microscope | ||
| Journal of baghdad college of dentistry | ||
| Article 1, Volume 23, Issue 2, 2011, Pages 31-35 | ||
| Author | ||
| Rasha H. Jehad | ||
| Abstract | ||
| ABSTRACTBackground: Long-term fluoride application on the teeth of patients receiving radiation therapy for head and necktumors results in excessive roughening of composite restorations. This in vitro study confirmed to compare the surfaceroughness and surface morphology of two different fluoride treatments on two dental composites containingdifferent resin matrix by simulating one year of clinical exposure for 10 minutes per day.Material and methods: Forty specimens of Filtek™ P90 (3M ESPE, USA) and Filtek™ Supreme XT (3M ESPE, USA) of(12mm diameter and 3mm height) were prepared..All specimens were polished with Sof-Lex disks(3M ESPE, USA). Allspecimens were brushed for 3 minutes with a soft-bristle tooth brush and mild dentifrice (control group).Eachcomposite specimens were immersed in one of the two fluoride gels 0.4% SnF2, or 1.1% NaF (Alpha-dent,USA) for 10days, 10 minutes per day (n=10). All specimens were subjected to surface roughness test before and after fluorideapplication by profilometer and evaluated using light polarizing microscope.ANOVA and Student t-test were used toanalyze the surface roughness value.Results: The Feltik™ supreme XT specimens showed significantly higher surface roughness value (Ra) than Feltik™P90before fluoride treatment (P<0.05). After both fluoride treatments composite disks of both types exhibited significantlyhigher surface roughness values (P<0.01). Both composite specimens presented significantly higher surface roughnesswhen treated with 0.4% SnF2 as compared to NaF (P<0.05)Conclusions:Topically applied fluorides induced adverse effects on the morphologic characteristics and compositionof flat, polished composite surfaces. Daily application of 0.4% SnF2 could be alternated with courses of 1.1% NaFwhich appears to be less damaging. Zirconium-containing products are sensitive to stannous fluoride. Compared tomethacrylate-based restorative materials, the new Silorane-based material had better topographical performance.Keywords: Silorane, surface roughness, SnF2, NaF, light polarizing microscope. (J Bagh Coll Dentistry 2011;23(31-36). | ||
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