Effect of light-curing units and activation mode on polymerization shrinkage and shrinkage stress of composite resins

Autor: Lawrence Gonzaga Lopes, Eduardo Batista Franco, José Carlos Pereira, Rafael Francisco Lia Mondelli
Jazyk: angličtina
Rok vydání: 2008
Předmět:
Zdroj: Journal of Applied Oral Science, Vol 16, Iss 1, Pp 35-42 (2008)
Druh dokumentu: article
ISSN: 1678-7757
1678-7765
DOI: 10.1590/S1678-77572008000100008
Popis: The aim of this study was to evaluate the polymerization shrinkage and shrinkage stress of composites polymerized with a LED and a quartz tungsten halogen (QTH) light sources. The LED was used in a conventional mode (CM) and the QTH was used in both conventional and pulse-delay modes (PD). The composite resins used were Z100, A110, SureFil and Bisfil 2B (chemical-cured). Composite deformation upon polymerization was measured by the strain gauge method. The shrinkage stress was measured by photoelastic analysis. The polymerization shrinkage data were analyzed statistically using two-way ANOVA and Tukey test (p
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