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Influence of NaHCO 3 Powder on Translucency of Microfilled Composite Resin Immersed in Different Mouthrinses
Author(s) -
COLUCCI VIVIAN,
DOS SANTOS CAMILA DEMETRIO,
AMARAL FLÁVIA LUCISANO BOTELHO DO,
CORONA SILMARA APARECIDA MILORI,
CATIRSE ALMA BLÁSIDA CONCEPCIÓN ELIZAUR BENITEZ
Publication year - 2009
Publication title -
journal of esthetic and restorative dentistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.919
H-Index - 60
eISSN - 1708-8240
pISSN - 1496-4155
DOI - 10.1111/j.1708-8240.2009.00269.x
Subject(s) - distilled water , polishing , resin composite , materials science , dentistry , statistical analysis , dentifrice , composite number , nuclear chemistry , medicine , composite material , zoology , chemistry , mathematics , chromatography , biology , inorganic chemistry , statistics , fluoride
The regular use of mouthrinses, particularly when combined with the use of air‐powder polishing, could affect the appearance of tooth‐colored restorations. The current study sought to evaluate the effect of NaHCO 3 powder on translucency of a microfilled composite resin immersed in different mouthrinses, at distinct evaluation periods. Eighty disk‐shaped specimens of composite resin (Durafill VS, Heraeus Kulzer GmbH & Co. KG, Hanau, Germany) were prepared. The composite specimens were then randomly allocated into two groups according to the surface treatment: exposure to NaHCO 3 powder (10 seconds) or nonexposure, and they were randomly assigned into four subgroups, according to the mouthrinses employed ( N = 10): Periogard (Colgate/Palmolive, São Bernardo do Campo, SP, Brazil), Cepacol (Aventis Pharma, São Paulo, SP, Brazil), Plax (Colgate/Palmolive), and distilled water (control group). The samples were immersed for 2 minutes daily, 5 days per week, over a 4‐month test period. Translucency was measured with a transmission densitometer at seven evaluation periods. Statistical analyses (analysis of variance and Tukey's test) revealed that: distilled water presented higher translucency values (86.72%); Periogard demonstrated the lowest translucency values (72.70%); and Plax (74.05%) and Cepacol (73.32%) showed intermediate translucency values, which were statistically similar between them ( p > 0.01). NaHCO 3 air‐powder polishing increased the changes in translucency associated with the mouthrinses. Air‐powder polishing alone had no effect on material translucency. Translucency percent was gradually decreased from 1 week of immersion up to 4 months. It may be concluded that the NaHCO 3 powder and the tested mouthrinses have affected the translucency of microfilled composite resin, according to the tested time. CLINICAL SIGNIFICANCE During the last decade, the demand for composite resin restorations has grown considerably, however, controversy persists regarding the effect of surface roughness on color stability.