アブストラクト（35巻2号：The Bulletin of Kanagawa Dental College）

The Bulletin of Kanagawa Dental College

English

Title　： A Study of the Effects of Irradiation on the Polymerization of a Dual-cured Resin Composite for Core Build-up Using Electron Spin Resonance (ESR) Spectroscopy
Subtitle　： ORIGINAL ARTICLES
Authors　： Naho Hamano1), Satoshi Ino1), Satoru Hojo1), Fumihiko Yoshino2), Tomonaga Watanabe1), Yuki Katsumata1), Masaichi-Chang-il Lee2), Minoru Toyoda1)
Authors（kana）　：
Organization　： 1)Division of Prosthetics, Department of Oral and Maxillofacial Rehabilitation, Kanagawa Dental College, 2)Division of Pharmacology and ESR Laboratories, Department of Clinical Care Medicine, Kanagawa Dental College
Journal　： The Bulletin of Kanagawa Dental College
Volume　： 35
Number　： 2
Page　： 159-163
Year/Month　： 2007 / 9
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： [Abstract]The purpose of this study was to investigate the effect of irradiation duration on the poly merization behavior of dual-cured resin composite indicated for core build-up (Clearfil DC Core Automix, Kuraray Co.,Ltd.). Polymerization radicals were analyzed with Electron Spin Resonance (ESR) spectroscopy. A comparative analysis was performed using three sample groups: a chemically cured group, a group dual-cured under irradiation for 20 seconds and a group dual-cured under irradiation for 60 seconds. The ESR spectrum of the sample groups was recorded at one-minute intervals for 60 minutes. The spin concentrations (max. value) were subjected to comparative analysis. The results of the analysis revealed that a higher degree of polymerization was achieved in the irradiated groups compared to the group polymerized solely by chemical reaction without irradiation (p<0.01). Furthermore, a longer duration of irradiation was proven to lead to a higher degree of polymerization (p<0.01). The results of this study indicate that sufficient irradiation is effective in ensuring a polymerization reaction even for dual-cured resin composite and is recommended for root canal dentine bonding.
Practice　： Dentistry
Keywords　： Polymerization, Electron spin resonance spectroscopy, Dual-cure