Influence of a new denture cleaning technique based on photolysis of H_2O_2 the mechanical properties and color change of acrylic denture base resin

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Author(s)

    • NAKAHARA Tatsuro
    • Division of Fixed Prosthodontics, Tohoku University Graduate School of Dentistry
    • HARADA Akio
    • Division of Fixed Prosthodontics, Tohoku University Graduate School of Dentistry
    • YAMADA Yasutomo
    • Division of Fixed Prosthodontics, Tohoku University Graduate School of Dentistry
    • ODASHIMA Yu
    • Division of Fixed Prosthodontics, Tohoku University Graduate School of Dentistry
    • NAKAMURA Keisuke
    • Laboratory for Redox Regulation, Tohoku University Graduate School of Dentistry
    • INAGAKI Ryoichi
    • Division of Fixed Prosthodontics, Tohoku University Graduate School of Dentistry
    • KANNO Taro
    • Division of Fixed Prosthodontics, Tohoku University Graduate School of Dentistry
    • SASAKI Keiichi
    • Division of Fixed Prosthodontics, Tohoku University Graduate School of Dentistry
    • NIWANO Yoshimi
    • Laboratory for Redox Regulation, Tohoku University Graduate School of Dentistry

Abstract

The purpose of this study was to evaluate the influence of a disinfection technique based on photolysis of H<sub>2</sub>O<sub>2</sub> on the mechanical properties and color change of acrylic denture base resin. Resin specimens were immersed in 1 M H<sub>2</sub>O<sub>2</sub> 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 <i>via</i> the photolysis of H<sub>2</sub>O<sub>2</sub>. 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.

Journal

  • Dental Materials Journal

    Dental Materials Journal 32(4), 529-536, 2013-08-01

    The Japanese Society for Dental Materials and Devices

References:  36

Codes

  • NII Article ID (NAID)
    10031178633
  • NII NACSIS-CAT ID (NCID)
    AA10443149
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    02874547
  • Data Source
    CJP  J-STAGE 
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