| Halogen lamp and led activation of resin-modified glass ionomer restorative material. In vitro microhardness after long term storage. | |
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MedLine Citation:
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PMID: 22077680 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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AIM: The purpose of this study was to evaluate the activation of resin-modified glass ionomer restorative material (RMGI, Vitremer-3M-ESPE, A3) by halogen lamp (QTH) or light-emitting diode (LED) by Knoop microhardness (KHN) in two storage conditions: 24hrs and 6 months and in two depths (0 and 2 mm). MATERIALS AND METHODS: The specimens were randomly divided into 3 experimental groups (n=10) according to activation form and evaluated in depth after 24h and after 6 months of storage. Activation was performed with QTH for 40s (700 mW/cm2) and for 40 or 20 s with LED (1,200 mW/scm2). After 24 hrs and 6 months of storage at 37°C in relative humidity in lightproof container, the Knoop microhardness test was performed. Statistics Data were analysed by three-way ANOVA and Tukey post-tests (p<0.05). RESULTS: All evaluated factors showed significant differences (p<0.05). After 24 hrs there were no differences within the experimental groups. KHN at 0 mm was significantly higher than 2 mm. After 6 months, there was an increase of microhardness values for all groups, being the ones activated by LED higher than the ones activated by QTH. CONCLUSION: Light-activation with LED positively influenced the KHN for RMGI evaluated after 6 months. |
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Authors:
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A Cassoni; P Macarini; E S Leonetti; J A Shibli; J A Rodrigues |
Publication Detail:
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Type: JOURNAL ARTICLE |
Journal Detail:
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Title: European journal of paediatric dentistry : official journal of European Academy of Paediatric Dentistry Volume: 12 ISSN: 1591-996X ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-11-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101121881 Medline TA: Eur J Paediatr Dent Country: - |
Other Details:
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Languages: ENG Pagination: 150-154 Citation Subset: - |
Affiliation:
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School of Dentistry, Guarulhos University, Brazil -Assistant professors of the Dental Research and Graduate Studies Division, Department of Restorative Dentistry. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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