| Curing efficiency of high-intensity light-emitting diode (LED) devices. | |
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MedLine Citation:
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PMID: 20587941 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We evaluated the curing efficiency of 4 high-intensity light-emitting diode (LED) devices by assessing percentage of residual C=C (%RDB), surface microhardness (SM), depth of cure (DC), percentage of linear shrinkage-strain (%LS), and percentage of wall-to-wall contraction (%WWC). The light-curing units tested were a QTH light, the Elipar TriLight (3M/ESPE), and 4 LED devices - the Allegro (Denmat), the Bluephase (Ivoclar/Vivadent), the FreeLight2 (3M/ESPE), and The Cure TC-01 (Spring Health Products). The %RDB was measured by microFTIR spectroscopy. Microhardness measurements (Vickers) were performed at the surface (H0) and at depths of 3 mm (H3) and 5 mm (H5) of cylindrical specimens. Depth of cure was expressed as the ratio of microhardness at each depth, relative to the corresponding surface value (H3/H0 and H5/H0). The bonded disc method was used to evaluate %LS. For the %WWC evaluation, cylindrical resin restorations were imaged by high resolution micro-CT and the %WWC was calculated at depths of 0 mm and 2 mm. There were no statistical differences among the LEDs in %RDB or %LS. The Bluephase and Allegro had the highest SM values. As compared with the other LEDs, the Bluephase and The Cure TC-01 had lower values for depth of cure at depths of 3 mm and 5 mm. There were no significant differences in %WWC among the LEDs at either depth, and the QTH had the lowest %WWC at both depths. |
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Authors:
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Christos Rahiotis; Katerina Patsouri; Nick Silikas; Afrodite Kakaboura |
Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Journal of oral science Volume: 52 ISSN: 1880-4926 ISO Abbreviation: J Oral Sci Publication Date: 2010 Jun |
Date Detail:
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Created Date: 2010-06-30 Completed Date: 2010-09-30 Revised Date: 2011-11-03 |
Medline Journal Info:
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Nlm Unique ID: 9808942 Medline TA: J Oral Sci Country: Japan |
Other Details:
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Languages: eng Pagination: 187-95 Citation Subset: D; IM |
Affiliation:
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Department of Oral Biology, Faculty of Dentistry, University of Athens, Goudi, Greece. craxioti@dent.uoa.gr |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Carbon
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chemistry,
radiation effects Composite Resins / chemistry*, radiation effects Curing Lights, Dental / classification*, standards Dental Marginal Adaptation Dental Materials / chemistry*, radiation effects Hardness Humans Materials Testing Photochemical Processes Polymers / chemistry, radiation effects Spectroscopy, Fourier Transform Infrared Surface Properties X-Ray Microtomography |
| Chemical | |
Reg. No./Substance:
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0/Composite Resins; 0/Dental Materials; 0/Polymers; 0/TPH spectrum; 7440-44-0/Carbon |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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