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Journal of Biomedical Optics • Open Access

Odontological light-emitting diode light-curing unit beam quality
Author(s): Thales Ribeiro de Magalhães Filho; Karin de Mello Weig; Marcelo Martins Werneck; Célio Albano da Costa Neto; Marysilvia Ferreira da Costa

Paper Abstract

The distribution of light intensity of three light-curing units (LCUs) to cure the resin-based composite for dental fillings was analyzed, and a homogeneity index [flat-top factor (FTF)] was calculated. The index is based on the M2 index, which is used for laser beams. An optical spectrum analyzer was used with an optical fiber to produce an x-y power profile of each LCU light guide. The FTF-calculated values were 0.51 for LCU1 and 0.55 for LCU2, which was the best FTF, although it still differed greatly from the perfect FTF=1, and 0.27 for LCU3, which was the poorest value and even lower than the Gaussian FTF=0.5. All LCUs presented notably heterogeneous light distribution, which can lead professionals and researchers to produce samples with irregular polymerization and poor mechanical properties.

Paper Details

Date Published: 13 May 2015
PDF: 5 pages
J. Biomed. Opt. 20(5) 055005 doi: 10.1117/1.JBO.20.5.055005
Published in: Journal of Biomedical Optics Volume 20, Issue 5
Show Author Affiliations
Thales Ribeiro de Magalhães Filho, Univ. Federal Fluminense (Brazil)
Karin de Mello Weig, Univ. Federal Fluminense (Brazil)
Marcelo Martins Werneck, Univ. Federal of Rio de Janeiro (Brazil)
Célio Albano da Costa Neto, UFRJ (Brazil)
Marysilvia Ferreira da Costa, UFRJ (Brazil)

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