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http://repositorio.unicamp.br/jspui/handle/REPOSIP/56366
Type: | Artigo |
Title: | Composite depth of cure using four polymerization techniques |
Author: | de Camargo, E. J. Moreschi, E. Baseggio, W. Cury, J. A. Pascotto, R. C. |
Abstract: | The light-curing technique is relevant to reduce the degree of polymerization shrinkage, improving clinical and esthetic success of composite resin restorations. Objective: To evaluate in vitro the effect of four light-curing techniques on depth of cure of a composite resin. Material and Methods: Ten specimens of a composite resin were made in cylindrical cavities prepared in PVC plates (3.0 x 7.0 mm) for each light-curing technique. Four photoactivation methods were investigated: stepped, ramped, pulse-delay and traditional. Specimens were longitudinally sectioned and polished for microhardness measurements (kg/mm(2)), which were made at 0.1, 1.0, 2.0 and 4.0 mm from the irradiated surface. Data were subjected to ANOVA and Tukey's test. Results: The effect of factors studied (curing method and distance from the surface) and the interaction of these factors was statistically significant (p<0.05). The traditional method of cure provided higher microhardness values (69.6 +/- 2.5) than the stepped (63.5 +/- 3.1) and pulsed (63.9 +/- 3.2) methods at all depths evaluated, but it did not differ from the ramped method (66.7 +/- 4.4) at 0.1 and 1.0 mm of depth. Conclusion: All techniques employed provided satisfactory cure of the composite resin up to the depth of 2.0 mm from the irradiated surface |
Subject: | Bis-Fenol A-Glicidil Metacrilato Resinas compostas |
Country: | Brasil |
Editor: | USP/Faculdade de Odontologia de Bauru |
Citation: | Journal Of Applied Oral Science. Univ Sao Paulo Fac Odontologia Bauru, v. 17, n. 5, n. 446, n. 450, 2009. |
Rights: | aberto |
Identifier DOI: | 10.1590/S1678-77572009000500018 |
Address: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572009000500018 |
Date Issue: | 2009 |
Appears in Collections: | FOP - Artigos e Outros Documentos |
Files in This Item:
File | Description | Size | Format | |
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000272088200018.pdf | 307.38 kB | Adobe PDF | View/Open |
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