13 May 2015 Odontological light-emitting diode light-curing unit beam quality
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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.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Thales Ribeiro de Magalhães Filho, Thales Ribeiro de Magalhães Filho, Karin de Mello Weig, Karin de Mello Weig, Marcelo Martins Werneck, Marcelo Martins Werneck, Célio Albano da Costa Neto, Célio Albano da Costa Neto, Marysilvia Ferreira da Costa, Marysilvia Ferreira da Costa, } "Odontological light-emitting diode light-curing unit beam quality," Journal of Biomedical Optics 20(5), 055005 (13 May 2015). https://doi.org/10.1117/1.JBO.20.5.055005 . Submission:
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