Pitting corrosion resistance of nickel-titanium rotary instruments with different surface treatments in seventeen percent ethylenediaminetetraacetic acid and sodium chloride solutions
Pitting corrosion resistance of nickel-titanium rotary instruments with different surface treatments in seventeen percent ethylenediaminetetraacetic acid and sodium chloride solutions
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DOI：
10.1016/j.joen.2007.11.012
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发表时间：
2008-02-01
影响因子：
4.2
通讯作者：
Schaefer, Edgar
中科院分区：
文献类型：
--
作者：
Bonaccorso, Antonio;Tripi, Teresa Roberta;Schaefer, Edgar
本研究评价了具有不同表面处理的镍钛（NiTi）旋转器械在17%乙二胺四乙酸（EDTA）和NaCl溶液中的耐点蚀性。将电抛光RaCe器械分配至A组，将非电抛光RaCe器械分配至B组，将物理气相沉积（PVD）涂层Alpha锉分配至C组（每组10件器械）。电化学测量通过使用用于伽伐尼电流测量的恒电位仪进行。根据电化学测试，预期EDTA中不存在局部腐蚀问题。在NaCl中，点蚀电位发生在较高的值为电抛光和PVD仪器，表明耐腐蚀性增加。未经表面处理的NiTi器械与NaCl接触时似乎存在腐蚀风险。镍钛锉经PVD和电解抛光表面处理后，其耐腐蚀性能有所提高。
This study evaluated the pitting corrosion resistance of nickel-titanium (NiTi) rotary instruments with different surface treatments in 17% ethylenediaminetetraacetic acid (EDTA) and NaCl solutions. Electropolished RaCe instruments were allocated to group A, non-electropolished RaCe instruments to group B, and physical vapor deposition (PVD)-coated Alpha files to group C (10 instruments per group). Electrochemical measurements were carried out by using a potentiostat for galvanic current measurements. On the basis of electrochemical tests, no localized corrosion problems are to be expected in EDTA. In NaCl, pitting potential occurred at higher values for the electropolished and PVD instruments, indicating an increased corrosion resistance. There appears to be a risk of corrosion for NiTi instruments without surface treatments in contact with NaCl. NiTi files with PVD and electropolishing surface treatments showed an increase corrosion resistance.