Electrochemical evaluation of the hydrogen peroxide- and fluoride-induced corrosive property and its recovery on the titanium surface |
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| Institution: | 1. Department of Biomedical and Neuromotor Sciences, Alma Mater Studiorum - University of Bologna, Bologna, Italy;2. Private practice, Battipaglia (SA), Italy;3. Private practice, Bari, Italy;4. Department of Neurosciences, University of Padova, Padova, Italy;1. Oral Functional Prosthodontics, Department of Oral Functional Science, Faculty and Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo, Hokkaido 060-8586, Japan;2. Oral Molecular Microbiology, Department of Oral Pathobiological Science, Faculty and Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo, Hokkaido 060-8586, Japan;3. Department of Removable Prosthodontics, Hokkaido University Hospital, Kita 14, Nishi 5, Kita-ku, Sapporo, Hokkaido 060-8586, Japan;4. Health Environment Control Research Group, Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14, Hayashi, Takamatsu, Kagawa 761-0395, Japan;5. Department of Advanced Prosthodontics, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima 734-8553, Japan;6. Department of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1, Tsushimanaka, Kita-ku, Okayama 700-8530, Japan;7. Biomaterials and Bioengineering, Department of Oral Health Science, Faculty and Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo, Hokkaido 060-8586, Japan;1. Department of Periodontology and Community Oral Health, Faculty of Dentistry, Universiti Sains Islam Malaysia, Level 15, Tower B, Persiaran MPAJ, 55100, Pandan Indah, Kuala Lumpur, Malaysia;2. Unit Periodontology, Department of Restorative Dentistry, Faculty of Dentistry, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300, Kuala Lumpur, Malaysia;3. Department of Mechanical and Nuclear Engineering, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates;4. Department of Mechanical & Manufacturing Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia;1. University of Heidelberg, Dental School, Department of Prosthodontics, Im Neuenheimer Feld 400, Heidelberg 69120, Germany;2. University of Heidelberg, Institute for Biometry and Informatics, University Hospital, Heidelberg, Im Neuenheimer Feld 130.3, Heidelberg 69120, Germany |
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| Abstract: | PurposeThis 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.MethodsTitanium 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.ResultsThe 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.ConclusionsOne 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. |
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| Keywords: | Titanium oxide films Hydrogen peroxide Fluoride Corrosive properties Electrochemical recovery |
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