| Knoop hardness of five composites cured with single-peak and polywave LED curing lights. | |
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MedLine Citation:
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PMID: 20927414 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: To compare the ability of four light-emitting diode (LED) curing lights to polymerize five composite resins in 10 seconds at 4 and 8 mm. METHOD AND MATERIALS: Two second-generation, single-peak LED curing lights (Bluephase 16i, Ivoclar Vivadent, and LEDemetron II, Kerr) and two third-generation polywave LED curing lights (UltraLume 5, Ultradent, and Bluephase G2, Ivoclar Vivadent) were compared. Three examples of each brand of curing light were used, and their light outputs were measured with a spectro-radiometer. Five composite resins (Filtek Supreme A2B, 3M ESPE; Vit-l-escence A2, Ultradent; Aelite LS Posterior A2, Bisco; and Tetric EvoCeram A2 and Tetric EvoCeram Bleach M, both Ivoclar Vivadent) were polymerized for 10 seconds at 4 and 8 mm from the end of the light guide. The Knoop microhardness (KHN50gf) was measured at 49 locations across the top and bottom surfaces of the specimens to determine the ability of each light to cure each brand of composite in 10 seconds. RESULTS: At 4 and 8 mm, the Bluephase G2 light delivered the broadest spectral range of wavelengths, greatest irradiance, and energy density. The Bluephase G2 always produced harder, better-cured resins compared to the other three lights. Overall, the ability of the lights to cure these five composites was ranked from highest to lowest: Bluephase G2, UltraLume 5, Bluephase 16i, and LEDemetron II (ANOVA with REGWQ multiple comparison test, P < .01). CONCLUSION: This study suggests that polywave LED curing lights should be used in preference to single-peak LED curing lights. |
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Authors:
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Richard B T Price; John Fahey; Christopher M Felix |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Quintessence international (Berlin, Germany : 1985) Volume: 41 ISSN: 1936-7163 ISO Abbreviation: Quintessence Int Publication Date: 2010 Nov-Dec |
Date Detail:
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Created Date: 2010-10-07 Completed Date: 2011-02-01 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0342677 Medline TA: Quintessence Int Country: Germany |
Other Details:
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Languages: eng Pagination: e181-91 Citation Subset: D |
Affiliation:
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Department of dental Clinical Sciences, Dalhousie University, Halifax, Nova Scotia, Canada. rbprice@dal.ca |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Analysis of Variance Composite Resins* / chemistry, radiation effects Curing Lights, Dental* Dental Stress Analysis Hardness Light-Curing of Dental Adhesives* Materials Testing Photoinitiators, Dental Semiconductors |
| Chemical | |
Reg. No./Substance:
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0/Composite Resins; 0/Photoinitiators, Dental |
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