Electrochemical evaluation of the hydrogen peroxide- and fluoride-induced corrosive property and its recovery on the titanium surface

Satoko Furiya-Sato, Azusa Fukushima, Gen Mayanagi, Keiichi Sasaki, Nobuhiro Takahashi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Purpose: This study aimed to elucidate the effects of hydrogen peroxide (H2O2) and sodium fluoride (NaF) on titanium surfaces under conditions mimicking those encountered during dental treatment. Methods: Titanium samples were immersed in artificial saliva (AS), 1 M H2O2, 1 M H2O2 with catalase, 1000 ppmF NaF, 1 M H2O2 with 1000 ppmF NaF, or 9000 ppmF NaF (9000 ppmF NaF: pH 5.3, other solutions: pH 6.5) for 3 min. The electrochemical properties of the titanium samples were analyzed before and after the immersion procedures using a potentiostat. The amounts of titanium eluted into each solution were measured using inductively coupled plasma mass spectrometry. The post-immersion color changes (ΔE*ab) and gloss values of the titanium samples were determined using spectrophotometry. Moreover, the solution-treated titanium samples were subsequently immersed in AS and analyzed electrochemically at 1, 2, 3, 4, 6, 8, and 24 h. Results: The immersion of titanium in any of the solutions except 1000 ppmF NaF caused significant increases in corrosive and passive currents and significant reductions in polarization resistance. No titanium elution or color changes were observed, except when 9000 ppmF NaF was used. After immersion in AS, the electrochemical properties of all of the titanium samples, except the 9000 ppmF NaF-treated samples, recovered within 24 h. Conclusions: One M H2O2 and 1000 ppmF NaF can be used alone or in combination in the clinical setting without causing significant titanium corrosion because the corrosive properties they induce is reversible. However, highly concentrated acidic fluorides can cause irreversible corrosion.

Original languageEnglish
Pages (from-to)307-312
Number of pages6
JournalJournal of Prosthodontic Research
Issue number3
Publication statusPublished - 2020 Jul


  • Corrosive properties
  • Electrochemical recovery
  • Fluoride
  • Hydrogen peroxide
  • Titanium oxide films


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