Research Papers: General

Odontological light-emitting diode light-curing unit beam quality

[+] Author Affiliations
Thales Ribeiro de Magalhães Filho, Karin de Mello Weig

Universidade Federal Fluminense, Faculdade de Odontologia, Rua São Paulo, 28, CEP 24020-150, Niteroi, RJ, Brazil

Marcelo Martins Werneck

Universidade Federal do Rio de Janeiro, COPPE-UFRJ, Rio de Janeiro, RJ, Brasil, Engenharia Elétrica, c.p. 68504, CEP: 21941-972l, Rio de Janeiro, Brazil

Célio Albano da Costa Neto, Marysilvia Ferreira da Costa

Universidade Federal do Rio de Janeiro, COPPE-UFRJ, Rio de Janeiro, RJ, Brasil, Engenharia Metalúrgica e de Materiais, c.p. 68505, CEP: 21941-972l, Rio de Janeiro, Brazil

J. Biomed. Opt. 20(5), 055005 (May 13, 2015). doi:10.1117/1.JBO.20.5.055005
History: Received January 26, 2015; Accepted April 14, 2015
Text Size: A A A

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.

Figures in this Article
© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Thales Ribeiro de Magalhães Filho ; Karin de Mello Weig ; Marcelo Martins Werneck ; Célio Albano da Costa Neto and Marysilvia Ferreira da Costa
"Odontological light-emitting diode light-curing unit beam quality", J. Biomed. Opt. 20(5), 055005 (May 13, 2015). ; http://dx.doi.org/10.1117/1.JBO.20.5.055005


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