Effect of storage temperature on the composite cohesive strength

Juliana Cardoso Alves, Fernanda Signorelli Calazans, Rebecca Cruz, Raimundo Alexandre da Silveira Vidigal Lacerda, Hélio Rodrigues Sampaio Filho

Abstract


The purpose of this study was to evaluate the diametral tensile strength (DTS) of a resin composite at different storage temperatures. Twelve cylindrical specimens were fabricated (n = 6), and they were divided into two groups: G1-resin at room temperature (25ºC) and G2- resin polymerized immediately after removal from the refrigerator (5ºC). Each specimen was inserted in three increments, each one was light-cured for 40 seconds. The test was performed at a speed of 1.0 mm/min until failure. The DTS was calculated (MPa)
and the results statistically analyzed by Student’s t-test (p > 0,05). The storage temperature had no effect on cohesive strength of the composite used in this study.

Keywords


Tração diametral; Temperatura de armazenamento; Resinas compostas



DOI: http://dx.doi.org/10.18363/rbo.v68n1.p.64

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