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Light-curing of dental resins with GaN violet laser diode: the effect of photoinitiator on mechanical strength.

Lasers in medical science (2011-02-24)
Atsushi Kameyama, Hitoshi Hatayama, Junji Kato, Akiko Haruyama, Hiromi Teraoka, Yasuaki Takase, Masao Yoshinari, Masatake Tsunoda
ABSTRACT

The purpose of this study was to evaluate whether a Gallium Nitride (GaN) -based violet laser diode (VLM500) could be used as a light source for light-cured dental resins. Three experimental unfilled resins containing different photoinitiators (camphorquinone, CQ; phenyl propanedione, PPD; or mono acylphosphineoxide, MAPO) were evaluated. These resins were light-cured with a VLM500 laser diode, and their ultimate micro-tensile strengths (μTS) were compared to those cured with three different LED light sources (Curenos, G-Light Prima-normal mode and G-Light Prima-PL mode). The VLM500 produced high μTS values in all three resins, and we concluded that this violet laser diode can be used as a light source for light-cured dental resin materials.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
1-Phenyl-1,2-propanedione, 99%
Sigma-Aldrich
1-Phenyl-1,2-propanedione, 98%, FG
Sigma-Aldrich
(1S)-(+)-Camphorquinone, 99%