| Effect of irradiation times on the polymerization depth of contemporary fissure sealants with different opacities. | |
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MedLine Citation:
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PMID: 21537639 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The aim of this study was to evaluate the depth of curing of 10 contemporary blue light-activated dental flowable materials at several opacities, influenced by different irradiation times using FT-IR spectroscopy. Fifty-five specimens (n = 5) with a 5-mm diameter and 1-mm thickness of translucent (Opallis Flow T), yellowed (Master Flow A2; Opallis Flow A2; Natural Flow A2; Fluroshield Yellowed), and opaque materials (Master Flow OA2; Natural Flow O; Opallis Flow OA3.5; Opallis Flow OP; Fluroshield White) were obtained at six curing times (10s, 20s, 30s, 40s, 50s, and 60s) using a high-intensity LED (Coltolux, Coltène/Whaledent). The degree of conversion (DC) (%) was obtained using the Nexus 470 FTIR Spectrometer (Nicolet Instruments, USA). The FTIR-ATR spectra for uncured and cured samples were analyzed using a ZnSe crystal. The top and bottom surfaces of the cured specimens were analyzed to obtain the depth of curing. Two-way ANOVA was used to analyze the data. The highest curing depth was obtained by Natural Flow OA2, while the lowest was shown by Master Flow OA2. The shortest curing time generated similar depths of cure in comparison with the most extensive for Opallis Flow A2 and Fluroshield Yellowed. Therefore, depth of curing, influenced by the irradiation time, was dependent on the materials. Using the Natural Flow OA2 opaque sealant and the 10-s curing time for Opallis Flow A2 and Fluroshield Yellowed may represent alternative approaches to sealing tooth fissures. |
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Authors:
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Boniek Castillo Dutra Borges; Gabriela Voany Galdino Bezerra; Janaína de Almeida Mesquita; Márcia Rodrigues Pereira; Flávio Henrique Baggio Aguiar; Alex José Souza Dos Santos; Isauremi Vieira de Assunção Pinheiro |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Brazilian oral research Volume: 25 ISSN: 1807-3107 ISO Abbreviation: Braz Oral Res Publication Date: 2011 Mar-Apr |
Date Detail:
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Created Date: 2011-05-03 Completed Date: 2011-09-30 Revised Date: 2012-03-26 |
Medline Journal Info:
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Nlm Unique ID: 101307187 Medline TA: Braz Oral Res Country: Brazil |
Other Details:
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Languages: eng Pagination: 135-42 Citation Subset: D; IM |
Affiliation:
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Department of Dentistry, Federal University of Rio Grande do Norte, Natal, RN, Brazil. boniek.castillo@gmail.com |
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* Humans Light-Curing of Dental Adhesives / methods Materials Testing Pit and Fissure Sealants / chemistry, radiation effects* Polymerization / radiation effects* Radiation Dosage Spectroscopy, Fourier Transform Infrared Surface Properties / radiation effects Time Factors |
| Chemical | |
Reg. No./Substance:
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0/Composite Resins; 0/Pit and Fissure Sealants |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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