Galvanic corrosion between various combinations of orthodontic brackets and archwires.

Autor: Bakhtari A; Department of Developmental Sciences, School of Dentistry, Marquette University, Milwaukee, WI, USA., Bradley TG, Lobb WK, Berzins DW
Jazyk: angličtina
Zdroj: American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics [Am J Orthod Dentofacial Orthop] 2011 Jul; Vol. 140 (1), pp. 25-31.
DOI: 10.1016/j.ajodo.2010.05.021
Abstrakt: Introduction: The purpose of this study was to compare galvanic currents generated by different combinations of commonly used brackets and archwires.
Methods: As-received stainless steel, nickel-titanium, and beta-titanium wires were coupled to stainless steel and titanium brackets in an artificial saliva medium. The galvanic current and amount of charge transferred for each pair were monitored with a zero resistance ammeter for 10 hours.
Results: Two-way analysis of variance (ANOVA) showed a significant difference in charge and galvanic currents when factored for type of bracket (P <0.001), but no significant difference between them when factored by type of wire (P >0.05). Specifically, a brazed stainless steel bracket was significantly greater in charge transferred and 10-hour galvanic current than metal injection molded stainless steel and titanium brackets (P <0.001), which were not different from each other (P >0.05).
Conclusions: The method of bracket manufacturing might be of equal or more relevance to galvanic corrosion susceptibility than bracket composition.
(Copyright © 2011 American Association of Orthodontists. Published by Mosby, Inc. All rights reserved.)
Databáze: MEDLINE
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