Resumo

GONZALEZ, Mariana Rodrigues; FERNANDES, Paula Mara; SUAREZ, Alexandre Vicente Garcia  e  SAMPAIO FILHO, Hélio Rodrigues. Evaluation of shrinkage stress during polymerization of a resin related to the adhesion area. Rev. Bras. Odontol. [online]. 2012, vol.69, n.1, pp. 21-24. ISSN 1984-3747.

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 4 mm (G2) were positioned on the upper and lower portions of the testing machine. The distance from the cylinders was 2 mm in G1 and 1 mm in G2. In each group, the resin (Fill-Magic - Vigodent) was inserted and photopolymerized between the cylinders and the stress was 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.

Palavras-chave : resin composite; shrinkage stress; photopolymerization..