Journal of Conservative Dentistry

ORIGINAL ARTICLE
Year
: 2012  |  Volume : 15  |  Issue : 4  |  Page : 333--336

Flexural strength of a composite resin light cured with different exposure modes and immersed in ethanol or distilled water media


Saulo Galvão dos Santos1, Marcos Ribeiro Moysés1, Carlos Eduardo Pinto Alcântara2, José Carlos Rabelo Ribeiro1, João Gustavo Rabelo Ribeiro1 
1 Department of Restorative Dentistry, Dental School of Três Corações, Vale do Rio Verde University, UNINCOR, Três Corações, Brazil
2 Department of Dentistry, Federal University of Vales do Jequitinhonha e Mucuri, UFVJM, Diamantina, MG, Brazil

Correspondence Address:
Marcos Ribeiro Moysés
Departament of Restorative Dentistry, UNINCOR, Campus Três Corações, Av. Castelo Branco, 82 - Chácara das Rosas, Três Corações- Minas Gerais, CEP: 37410-000
Brazil

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«SQ»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.


How to cite this article:
dos Santos SG, Moysés MR, Alcântara CP, Ribeiro JR, Ribeiro JR. Flexural strength of a composite resin light cured with different exposure modes and immersed in ethanol or distilled water media.J Conserv Dent 2012;15:333-336


How to cite this URL:
dos Santos SG, Moysés MR, Alcântara CP, Ribeiro JR, Ribeiro JR. Flexural strength of a composite resin light cured with different exposure modes and immersed in ethanol or distilled water media. J Conserv Dent [serial online] 2012 [cited 2019 Jul 18 ];15:333-336
Available from: http://www.jcd.org.in/article.asp?issn=0972-0707;year=2012;volume=15;issue=4;spage=333;epage=336;aulast=dos;type=0