Effects of sodium fluoride mouth rinses on the torsional properties of miniscrew implants

Takeshi Muguruma, Masahiro Iijima, William A. Brantley, Toshihiro Yuasa, Hee Moon Kyung, Itaru Mizoguchi

研究成果: Article査読

17 被引用数 (Scopus)


Introduction: Effects of sodium fluoride (NaF) mouth rinse solutions on torsional properties of a miniscrew implant were investigated. Methods: As-received Ti-6Al-4V miniscrew implants (AbsoAnchor [Dentos, Inc., Daigu, Korea]) were immersed in 0.1% or 0.2% NaF mouth rinse solution (pH 5.12 and 5.14, respectively) for 1 hour or 24 hours. Miniscrew implants selected as controls were not immersed. Each implant was subjected to increasing torque until fracture (n = 5 in sample groups). Mean moment and twist angle for fracture were compared using 1-way analysis of variance (ANOVA). Surfaces of implants after immersion were observed with a scanning electron microscope (SEM). Electron microprobe and micro-x-ray diffraction analyses were performed to obtain composition information about deposits on implant surfaces. Results: Pits and cracks formed on the implant surfaces after immersion in both NaF mouth rinse solutions. Corrosion products, probably sodium aluminum fluoride (Na 3AlF6), were observed on the implants after immersion in both NaF solutions for both time periods. There were no significant differences for mean torque (P = 0.063) and twist angle (P = 0.696) at fracture compared with control implants. Conclusions: Although titanium alloy miniscrew implants corroded slightly from immersion in 0.1% or 0.2% NaF solutions, mouth rinsing by patients with the same fluoride solution concentrations should not cause deterioration of their torsional performance.

ジャーナルAmerican Journal of Orthodontics and Dentofacial Orthopedics
出版ステータスPublished - 2011 5月 1

ASJC Scopus subject areas

  • 歯科矯正学


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