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
2013 Dental materials journal  
The purpose of this study was to evaluate the influence of a disinfection technique based on photolysis of H 2 O 2 on the mechanical properties and color change of acrylic denture base resin. Resin specimens were immersed in 1 M H 2 O 2 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
more » ... d via the photolysis of H 2 O 2 . 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.
doi:10.4012/dmj.2013-047 pmid:23903632 fatcat:eh6z4324ijbopia56idzhh3sou