The Effects of Fluoride-containing Solutions on Pure Titanium and its Alloys (Ti-6Al-4V)

DOI Web Site 14 References
  • UCHIYAMA Toshikazu
    Department of Community Oral Health, Nihon University School of Dentistry at Matsudo:Department of Preventive Dentistry, Nihon University School of Dentistry at Matsudo
  • KOBAYASHI Seigo
    Department of Community Oral Health, Nihon University School of Dentistry at Matsudo
  • TAGUCHI Chieko
    Department of Community Oral Health, Nihon University School of Dentistry at Matsudo
  • HAYAKAWA Touru
    Department of Dental Biomaterials, Nihon University School of Dentistry at Matsudo
  • KOUNO Yoshiharu
    Department of Preventive Dentistry, Nihon University School of Dentistry at Matsudo
  • YAMAUCHI Rio
    Department of Community Oral Health, Nihon University School of Dentistry at Matsudo
  • ARIKAWA Kazumune
    Department of Community Oral Health, Nihon University School of Dentistry at Matsudo:Department of Preventive Dentistry, Nihon University School of Dentistry at Matsudo
  • GOTOUDA Hiroya
    Department of Community Oral Health, Nihon University School of Dentistry at Matsudo

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Other Title
  • 純チタンおよびチタン合金(Ti-6Al-4V)に及ぼすフッ化物製剤の影響
  • ジュンチタン オヨビ チタン ゴウキン Ti 6Al 4V ニ オヨボス フッカブツ セイザイ ノ エイキョウ

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Description

Recently, titanium and its alloy have been widely used in clinical applications such as denture bases, dental implants, crowns, or orthodontic wires, because they have high corrosion resistance, superior chemical stability, and biocompatibility. However, it was reported that the corrosion resistance of titanium and its alloy was decreased in fluoride containing solution, which is clinically used for the prevention of dental caries. But these reports were based on an in vitro study. The purpose of this study was to evaluate the effects of the corrosion resistance of titanium and its alloy in the presence of fluoride close to the clinical condition. Titanium and its alloy (Ti-6Al-4V) were immersed in fluoride prophylactic agents (NaF solution: NEO^<TM>, 9,000ppm F or F-rinse solution: Miranor^<TM>, 450ppm F) and then artificial saliva. After immersion, a differential colorimeter was used to assess the degree of corrosion. Morphological changes in the titanium surface were examined by a scanning electron microscope (SEM). The mean color change values (ΔE) were statistically analyzed by the west at a significance level of p=0.05. There were no significant differences in ΔE values between before and after immersion in F-rinse solution or NaF solution for titanium and Ti-6Al-4V. SEM images demonstrated similar surfaces before and after immersion in F-rinse solution as well as NaF solution for titanium and Ti-6Al-4V. These results indicate that there is no problem in the clinical dental practice whereby titanium and Ti-6Al-4V contact NaF solution or F-rinse solution.

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