Chemical and morphological features of dental composite resin: Influence of light curing units and immersion media

Aims: The study evaluated the influence of light curing units and immersion media on superficial morphology and chemistry of the nanofilled composite resin Supreme XT (3M) through the EDX analysis and SEM evaluation. Light curing units with different power densities and mode of application used were...

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Bibliographic Details
Published in:Microscopy research and technique 2010-03, Vol.73 (3), p.176-181
Main Authors: Dos Santos, Patrícia Aleixo, Garcia, Patrícia Petromilli Nordi Sasso, De Oliveira, Ana Luisa Botta Martins, Chinelatti, Michelle Alexandra, Palma-Dibb, Regina Guenka
Format: Article
Language:English
Subjects:
beverages
Calcium
Coca
Coffee
composite resin
Composite Resins - chemistry
Composite Resins - radiation effects
Curing
Degradation
dental technology
Deposition
EDX
Humans
Immersion
Light
Microscopy, Electron, Scanning
Nanostructure
Resins
Saliva
SEM
Spectrometry, X-Ray Emission
Tea
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Summary:Aims: The study evaluated the influence of light curing units and immersion media on superficial morphology and chemistry of the nanofilled composite resin Supreme XT (3M) through the EDX analysis and SEM evaluation. Light curing units with different power densities and mode of application used were XL 3000 (480 mW/cm2), Jet Lite 4000 Plus (1230mW/cm2), and Ultralume Led 5 (790 mW/cm2) and immersion media were artificial saliva, Coke®, tea and coffee, totaling 12 experimental groups. Specimens (10 mm × 2 mm) were immersed in each respective solution for 5 min, three times a day, during 60 days and stored in artificial saliva at 37°C ± 1°C between immersion periods. Topography and chemical analysis was qualitative. Findings: Groups immersed in artificial saliva, showed homogeneous degradation of matrix and deposition of calcium at the material surface. Regarding coffee, there was a reasonable chemical degradation with loss of load particles and deposition of ions. For tea, superficial degradation occurred in specific areas with deposition of calcium, carbon, potassium and phosphorus. For Coke®, excessive matrix degradation and loss of load particles with deposition of calcium, sodium, and potassium. Conclusion: Light curing units did not influence the superficial morphology of composite resin tested, but the immersion beverages did. Coke® affected material's surface more than did the other tested drinks. Microsc. Res. Tech., 2010. © 2009 Wiley‐Liss, Inc.
ISSN:1059-910X
1097-0029
DOI:10.1002/jemt.20769