A method for improving the light intensity distribution in dental light-curing units

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Author(s)

    • ARIKAWA Hiroyuki
    • Department of Biomaterials Science, Graduate School of Medical and Dental Sciences, Kagoshima University
    • TAKAHASHI Hideo
    • Department of Electronics Engineering, Faculty of Engineering, Shibaura Institute of Technology
    • MINESAKI Yoshito
    • Department of Fixed Prosthetic Dentistry, Graduate School of Medical and Dental Sciences, Kagoshima University
    • MURAGUCHI Kouichi
    • Department of Fixed Prosthetic Dentistry, Graduate School of Medical and Dental Sciences, Kagoshima University
    • MATSUYAMA Takashi
    • Department of Periodontology, Graduate School of Medical and Dental Sciences, Kagoshima University
    • KANIE Takahito
    • Department of Biomaterials Science, Graduate School of Medical and Dental Sciences, Kagoshima University
    • BAN Seiji
    • Department of Biomaterials Science, Graduate School of Medical and Dental Sciences, Kagoshima University

Abstract

A method for improving the uniformity of the radiation light from dental light-curing units (LCUs), and the effect on the polymerization of light-activated composite resin are investigated. Quartz-tungsten halogen, plasma-arc, and light-emitting diode LCUs were used, and additional optical elements such as a mixing tube and diffusing screen were employed to reduce the inhomogeneity of the radiation light. The distribution of the light intensity from the light guide tip was measured across the guide tip, as well as the distribution of the surface hardness of the light-activated resin emitted with the LCUs. Although the additional optical elements caused 13.2–25.9% attenuation of the light intensity, the uniformity of the light intensity of the LCUs was significantly improved in the modified LCUs, and the uniformity of the surface hardness of the resin was also improved. Our results indicate that the addition of optical elements to the LCU may be a simple and effective method for reducing inhomogeneity in radiation light from the LCUs.

Journal

  • Dental Materials Journal

    Dental Materials Journal 30(2), 151-157, 2011-03-01

    The Japanese Society for Dental Materials and Devices

References:  17

Codes

  • NII Article ID (NAID)
    10028100391
  • NII NACSIS-CAT ID (NCID)
    AA10443149
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    02874547
  • Data Source
    CJP  J-STAGE 
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