Abrasion resistance of direct and indirect resins as a function of a sealant veneer.
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Date
2014-05
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Abstract
Background: Abrasive wear is one of the most common type of wear that not only affect teeth,
as also dental restorations. Thus to investigate one of the etiological factors as tooth brushing
procedure is clinical relevant in order to select the best material combination that may prevent
damage of resin dental restoration's abrasion.
Aims: This study evaluated the influence of tooth brushing on mass loss and surface roughness
of direct Venus (Vs) and indirect Signum (Sg) resin composites, with and without a surface
sealant, Fortify (F).
Materials and Methods: Twenty‑four specimens were prepared with each resin composite, using
their proprietary curing units, according to manufacturer’s instructions. All the specimens were
polished and ultrasonically cleaned in distilled water for 5 minutes. Half of the specimens of
each resin (n = 12) were covered with F (VsF and SgF), except for the control (C) specimens
(VsC and SgC), which were not sealed. Mass loss (ML) as well as surface roughness (Ra) was
measured for all the specimens. Then, the specimens were subjected to toothbrush–dentifrice
abrasion, using a testing machine for 67.000 brushing strokes, in an abrasive slurry. After
brushing simulation, the specimens were removed from the holder, rinsed thoroughly and blot
dried with soft absorbent paper. The abrasion of the material was quantitatively determined
with final measurements of ML and surface roughness, using the method described above.
Results: ML data were analyzed by two‑way analysis of variance (ANOVA) and the analysis
indicated that resin composites were not statistically different; however, the specimens sealed
with F showed higher ML. Ra mean values of the groups VsF and SgF significantly increased.
Conclusion: Tooth brushing affects mainly the roughness of the direct and indirect resin
composites veneered with a sealant.
Description
Keywords
Brushing abrasion, composite resins, sealant
Citation
Caneppele Taciana Marco Ferraz, Rocha Daniel Maranha, Araujo Maria Amelia Máximo, Valera Márcia Carneiro, Marocho Susana María Salazar. Abrasion resistance of direct and indirect resins as a function of a sealant veneer. Indian Journal of Dental Research. 2014 May-Jun; 25(3): 381-385.