Flexural Strength of a Composite Resin Light Cured with Different Exposure Modes and Immersed in Ethanol or Distilled Water Media

Overview

Journal J Conserv Dent

Specialty Dentistry

Date 2012 Nov 1

PMID 23112479

Citations 5

Authors

Saulo Galvao Dos Santos

Marcos Ribeiro Moyses

Carlos Eduardo Pinto Alcantara

Jose Carlos Rabelo Ribeiro

Joao Gustavo Rabelo Ribeiro

Affiliations

Soon will be listed here.

Abstract

Aim: The aim of this in vitro study was to evaluate the flexural strength of a composite resin polymerized with three different modes of light exposure.

Materials And Methods: The three different modes of light exposure were conventional, 600 mW/cm2/40s; soft start, 300 mW/cm2/10s + 600 mW/cm2/30s; pulse delay, 600 mW/cm2/1s + 60 s of waiting time + 600 mW/cm2/39s). Twenty samples were prepared for each polymerization method. Flexural strength (FS) tests were carried out with a 2 kN load at a speed of 0.5 mm/ min. All tested groups were submitted to analysis of variance (one-way-ANOVA) and Tukey's test (P < 0.05).

Results: When stored in water, conventional and pulse delay groups presented higher FS values which were statistically different from the soft start group. When stored in 100% ethanol, conventional and soft start groups presented higher FS values which were statistically different from the pulse delay group.

Conclusion: Different polymerization modes and immersion media can affect the physical properties (flexural strength) of composite resin.

Citing Articles

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How the Duration and Mode of Photopolymerization Affect the Mechanical Properties of a Dental Composite Resin.

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