2006年7月
Galvanic corrosion behavior of orthodontic archwire alloys coupled to bracket alloys
Angle Orthodontist
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- 巻
- 76
- 号
- 4
- 開始ページ
- 705
- 終了ページ
- 711
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1043/0003-3219(2006)076[0705:GCBOOA]2.0.CO;2
- 出版者・発行元
- E H ANGLE EDUCATION RESEARCH FOUNDATION, INC
The purpose of this study was to provide a quantitative assessment of galvanic corrosion behavior of orthodontic archwire alloys coupled to orthodontic bracket alloys in 0.9% NaCl solution and to study the effect of surface area ratios. Two common bracket alloys, stainless steels and titanium, and four common wire alloys, nickel-titanium (NiTi) alloy, beta-titanium (beta-Ti) alloy, stainless steel, and cobalt-chromium-nickel alloy, were used. Three different area ratios, 1:1, 1:2.35, and 1:3.64, were used; two of them assumed that the multibracket appliances consists of 14 brackets and 0.016 inch of round archwire or 0.016 X 0.022 inch of rectangular archwire. The galvanic current was measured for 3 successive days using zero-impedance ammeter. When the NiTi alloy was coupled with Ti (1:1, 1:2.35, and 1:3.64 of the surface area ratio) or beta-Ti alloy was coupled with Ti (1:2.35 and 1:3.64 of the surface area ratio), Ti initially was the anode and corroded. However, the polarity reversed in 1 hour, resulting in corrosion of the NiTi or beta-Ti. The NiTi alloy coupled with SUS 304 or Ti exhibited a relatively large galvanic current density even after 72 hours. It is suggested that coupling SUS 304-NiTi and Ti-NiTi may remarkably accelerate the corrosion of NiTi alloy, which serves as the anode. The different anode-cathode area ratios used in this study had little effect on galvanic corrosion behavior.
- リンク情報
- ID情報
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- DOI : 10.1043/0003-3219(2006)076[0705:GCBOOA]2.0.CO;2
- ISSN : 0003-3219
- PubMed ID : 16808581
- Web of Science ID : WOS:000239016800026