种植牙上部结构牙科合金的电偶腐蚀行为
Galvanic corrosion behavior of implant suprastructure dental alloys.
作者信息
Taher Nadia M, Al Jabab Abed S
机构信息
Department of Restorative Dental Sciences, College of Dentistry, King Saud University, P.O. Box 87654, 11652, Riyadh, Saudi Arabia.
出版信息
Dent Mater. 2003 Jan;19(1):54-9. doi: 10.1016/s0109-5641(02)00008-8.
OBJECTIVE
The purpose of this study was to evaluate and compare in vitro, the galvanic corrosion behavior of Co-Cr alloys (R2000, R800), Ni-Cr (RCS), silver-palladium (Jelstar), Gold (Pontallor-4) and Ternary Ti (experimental Ter Ti) when coupled with endosseous Ti implant abutment material. Amalgam alloy and commercially pure Ti cylinders (SSTi) were coupled with endosseous Ti implants as negative and positive controls, respectively.
METHODS
An EG&G Model 263 Scanning Potentiostat was used for this purpose. Specimens were prepared and fresh artificial saliva was used as an electrolyte solution. The experiment run time was 24h for each couple. The common potential, galvanic current and current integration during the last 6h were recorded for each couple.
RESULTS
The results showed that the best couples were Ti/Pontallor-4, Ti/Ter Ti, Ti/R800 and Ti/Jelstar. The least acceptable couples were Ti/amalgam, SSTi/SSTi and Ti/R2000, while the Ti/RCS couple showed unstable galvanic corrosion behavior.
SIGNIFICANCE
It is concluded that the following alloys can be used as suprastructure alloys with Ti implants: Pontallor-4, R800, Jelstar and Ter Ti. Although Ter Ti alloy is an experimental alloy, it showed good results, but cannot be used in the clinical field unless extensive investigations are carried out. The SSTi/SSTi couple showed unexpected galvanic corrosion behavior which needs further investigation.
目的
本研究的目的是在体外评估和比较钴铬合金（R2000、R800）、镍铬合金（RCS）、银钯合金（Jelstar）、金合金（Pontallor - 4）和三元钛合金（实验性Ter Ti合金）与骨内钛种植体基台材料耦合时的电偶腐蚀行为。汞合金和商业纯钛圆柱体（SSTi）分别与骨内钛种植体耦合作为阴性和阳性对照。
方法
为此使用了一台EG&G 263型扫描恒电位仪。制备标本，并使用新鲜人工唾液作为电解质溶液。每对样品的实验运行时间为24小时。记录每对样品在最后6小时内的共同电位、电偶电流和电流积分。
结果
结果表明，最佳配对是钛/Pontallor - 4、钛/Ter Ti合金、钛/R800和钛/Jelstar。最不可接受的配对是钛/汞合金、SSTi/SSTi和钛/R2000，而钛/RCS配对显示出不稳定的电偶腐蚀行为。
意义
得出以下结论：以下合金可作为钛种植体的上部结构合金使用：Pontallor - 4、R800、Jelstar和Ter Ti合金。虽然Ter Ti合金是一种实验合金，但它显示出良好的结果，但除非进行广泛研究，否则不能用于临床领域。SSTi/SSTi配对显示出意外的电偶腐蚀行为，需要进一步研究。
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