アブストラクト（27巻1号：The Bulletin of Kanagawa Dental College）

The Bulletin of Kanagawa Dental College

English

Title　： Study on Curing Conditions of Light-cured Composite Resin (Part 2) The Efficiency of a Light Curing Unit with a Long Continuous Operation
Subtitle　： ORIGINAL ARTICLES
Authors　： Kiyoo Obata, Mikiko Yamada, Kazuo Shimoyama, Kozo Umemoto, Kazuhiko Jyoshin
Authors（kana）　：
Organization　： Department of Dental Materials, Kanagawa Dental College
Journal　： The Bulletin of Kanagawa Dental College
Volume　： 27
Number　： 1
Page　： 19-24
Year/Month　： 1999 / 3
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： [Abstract] The purpose of this study is to investigate the performance and durability of light curing units on the mechanical properties of light-cured composite resins. Three commercial visible light-cured composite resins, Silux-Plus (SP), Lite-fil IIA (LF), Photo clearfil bright (PB), and two light curing units, Griplight II (G) and Visilux2 (V) were used to make cylindrical specimens. By measuring their compressive strengths, the durability of light curing units on the mechanical property of composite resin was examined. The light intensity of a light curing unit used for composite resins changes with long continuous operation. The light intensity of G begins to diminish, and the compressive strength of SP is affected by its diminution. The decrease in compressive strength immediately before a lamp of G breaks is especially obvious, while the strength of LF is independent of the light intensity of G. The wavelength spectrums of light and the light intensity in each wavelength band differ among units. The wavelength bands except for 470nm are also concerned with the polymerization of light-cured composite resin, and the 420+-20nm wavelength band is more effective for some commercial composite resins than 470+-20nm. Commercial composite resin has various light sensitivities in each wavelength band, and the light sensitivities at specified wavelength bands differ among composite resins.
Practice　： Dentistry
Keywords　： Light-cured composite resin, Compressive strength, Light curing unit, Light intensity, Wavelength