Dental Materials Journal
Online ISSN : 1881-1361
Print ISSN : 0287-4547
ISSN-L : 0287-4547
Original Paper
Influence of a new denture cleaning technique based on photolysis of H2O2 the mechanical properties and color change of acrylic denture base resin
Tatsuro NAKAHARA, Akio HARADA, Yasutomo YAMADA, Yu ODASHIMA, Keisuke NAKAMURA, Ryoichi INAGAKI, Taro KANNO, Keiichi SASAKI, Yoshimi NIWANO
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Keywords: Denture cleaning, Hydroxyl radical, Hydrogen peroxide, Acrylic resin, Flexural strength
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2013 Volume 32 Issue 4 Pages 529-536

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Abstract

The purpose of this study was to evaluate the influence of a disinfection technique based on photolysis of H2O2 on the mechanical properties and color change of acrylic denture base resin. Resin specimens were immersed in 1 M H2O2 irradiated with light-emitting diode (LED) light at 400 nm for 1 week. The immersion duration of 1 week (168 h) corresponded to performing approximately 500 times of 20-min cleaning. Hydroxyl radicals are potent oxidants and they were generated via the photolysis of H2O2. Oxidative damage caused by these radicals included reduced flexural strength and altered color for the acrylic resin. Nonetheless, the degraded flexural strength and altered color of acrylic resin after 500 times of cleaning in the disinfection system would be within clinically acceptable levels.

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© 2013 The Japanese Society for Dental Materials and Devices
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