Fluoride Research Today is a free monthly online journal that collates and summarizes the latest research about Fluoride, including details on toothpaste, water, treatment, dangers.

Effect of acidic fluoride solution on beta titanium alloy wire.

Kwon YH, Seol HJ, Kim HI, Hwang KJ, Lee SG, Kim KH

Department of Dental Materials, College of Dentistry and Medical Research Institute, Pusan National University, 1-10 Ami-dong Seo-gu, Pusan 602-739, Korea. y0k0916@pusan.ac.kr

The interaction between acidic fluoride solution and beta titanium alloy was investigated to explore the changes that occur in beta titanium alloy by fluoride-containing acetic acid solutions. For this, alloy crystal structure, tensile strength, and elements released from the alloy wires were determined using four solutions (0.05%/pH 6, 0.05%/pH 4, 0.2%/pH 6, and 0.2%/pH 4) for 1 or 3 days. The immersed wire did not form any identifiable new crystal structure compared with the as-received wire. The tensile strength of the immersed wires was significantly reduced compared to the as-received wires in the test solutions if the period of immersion increased from as-received to 3 days. The fractured area of the immersed wire was reduced compared to the as-received one. The dimple pattern at the inner part and a cup-cone morphology at the outer part of the fractured wires were similar in both as-received and immersed wires. After a 3-day immersion, the amount of the released Ti and Mo has much increased for higher NaF concentration and lower pH value. During the long-period orthodontic treatment, both patient and clinical doctor should carefully use the fluoride-containing products to minimize unexpected damage on orthodontic wires.

Published 28 April 2005 in J Biomed Mater Res B Appl Biomater, 73(2): 285-90.
Full-text of this article is available online (may require subscription).

© 2004-2008 Fluoride Research Today. All Rights Reserved.