Corrosive effect of disinfection solution containing hydroxyl radicals generated by photolysis of H2O2 on dental metals

Abstract

The purpose of the present study was to evaluate the corrosive effect of disinfection solution containing hydroxyl radicals generated by photolysis of H 2 O 2 on dental metals. Static immersion test was performed on four different dental metals: Ti, Type 316L stainless steel, Ag-Pd-Cu-Au alloy, and Co-Cr alloy. Metal specimens were immersed in 1 M H 2 O 2 (=3.4%) with or without light-emitting diode (LED) light irradiation (wavelength: 400 nm) for 1 week, and then the amounts of released ions were analyzed. Corrosive effect of the disinfection solution containing hydroxyl radicals on any dental metals tested in the present study never exceeded that of H 2 O 2 alone. Therefore, disinfection systems based on the photolysis of H 2 O 2 for the cleaning of dentures and treatment of oral infectious diseases would not cause problematic metal corrosion whenever the concentration of H 2 O 2 does not exceed 3%, which is a concentration used as an oral disinfectant.

Study of the Vickers hardness and corrosion behavior of experimental Ti-Mo alloy in dental office bleaching agents

“…Their results suggest that discoloration in titanium alloys immersed in hydrogen peroxidecontaining acidulated solutions is caused by an increase in the thickness of this oxide film, whereas discoloration of Ti-Ni is caused by corrosion. Nakamura et al 33 evaluated the corrosive effect of disinfection solution containing hydroxyl radicals generated by photolysis of H 2 O 2 on dental metals (Ti, Type 316L stainless steel, Ag-Pd-Cu-Au alloy and Co-Cr alloy) and observed that hydrogen peroxide can be applied to denture cleaning device without problematic metal corrosion unless the dentures contain Ti components.…”

Influence of a new denture cleaning technique based on photolysis of H2O2 the mechanical properties and color change of acrylic denture base resin

“…To estimate the amounts of hydroxyl radicals generated and remaining H2O2 after the immersion test, two additional experiments as described in our previous studies 11,23) after LED irradiation The concentration of H 2O2 was expected to decrease with Fig. 2 Flexural strengths of acrylic denture base resin specimens after the immersion test expressed in mean value with standard deviation (n=5).…”

“…In the present study, photolysis of 1 M H 2O2 was carried out using an experimental LED irradiation device as described in our previous study 11) . Each chamber of the experimental device was equipped with two LED light sources, which emitted light with a wavelength of 400 nm (NHH105UV, Lustrous Technology, Shiji, Taipei, Taiwan) 21) .…”

“…None of the metals corroded except Ti, and that the corrosive effect of the disinfection solution did not exceed that of 1 M H2O2 alone without LED light irradiation at 400 nm wavelength. Therefore, our new chemical disinfection method would not cause problematic metal corrosion if the concentration of H 2O2 were 1 M or less 11) . However, it remains to be seen if our new denture cleaning technique, which entails long-term exposure to H 2O2 with LED light irradiation, would cause acrylic denture base resins to degrade.…”

“…Repeated exposure to hydroxyl radicals for daily cleaning might cause dental materials used for removable dentures to corrode or degrade. In a previous study, we investigated the corrosive effect of a disinfection solution containing hydroxyl radicals generated by photolysis of 1 M H 2O2 (≒3%) on these dental metals: Ti, stainless steel, Ag-Pd-Cu-Au alloy, and Co-Cr alloy 11) . None of the metals corroded except Ti, and that the corrosive effect of the disinfection solution did not exceed that of 1 M H2O2 alone without LED light irradiation at 400 nm wavelength.…”