Evaluation of shrinkage stress during polymerization of a resin related to the adhesion area

Mariana Rodrigues Gonzalez, Paula Mara Fernandes, Alexandre Vicente Garcia Suarez, Hélio Rodrigues Sampaio Filho

Abstract


The aim of this study is to evaluate the shrinkage stress generated during polymerization of a composite resin related to the adhesion area. Cylinders of glass with 2 mm in diameter (G1) or 4mm (G2) were positioned on the upper and lower portions of the testing machine. The distance from the cylinders was 2mm in G1 and 1mm in G2. In each group, the resin (Fill-Magic - Vigodent) was inserted and photopolymerized between the cylinders and the stress measured for 15minutes (n = 5). Data were analyzed by Student t test (p <0,05). The largest area of adhesion generated lower shrinkage stress to the tested material.

Keywords


Resina composta; Tensão de contração; Fotopolimerização



DOI: http://dx.doi.org/10.18363/rbo.v69n1.p.21

Copyright (c) 2016 Revistas

e-ISSN: 1984-3747

Licença Creative Commons The Brazilian Journal of Dentistry is licensed with a Creative Commons Atribuição-NãoComercial 4.0 Internacional