Uslu Gülşah, Özyürek Taha, Yılmaz Koray
Faculty of Dentistry, Department of Endodontics, Onsekiz Mart University, Çanakkale, Turkey.
Faculty of Dentistry, Department of Endodontics, Medeniyet University, İstanbul, Turkey.
Microsc Res Tech. 2018 Dec;81(12):1406-1411. doi: 10.1002/jemt.23098. Epub 2018 Oct 23.
The aim of the present study was to compare the effect of exposure to sodium hypochlorite (NaOCl) and ethylenediaminetetraacetic acid (EDTA) on the surface topography and roughness of HyFlex controlled memory (CM) and HyFlex electrical discharge machining (EDM) using atomic force microscopy (AFM). Twenty HyFlex EDM (25/.08) and 20 HyFlex CM (25/.06) files were divided into five groups (n = 4). One group served as a negative control group. The files in the other groups were exposed to 5.25% NaOCl and 17% EDTA solutions at 37°C for 5 and 10 min, respectively, and examined using AFM after each exposure. The data were analyzed using one-way ANOVA test. The lowest values were observed in the control group of HyFlex EDM files (p < .05). The highest values were observed in the HyFlex EDM and HyFlex CM files immersed in EDTA for 10 min (p < .05). In conclusion, the tested irrigants had a significant negative effect on the surface porosity of NiTi files. The immersion of NiTi files in irrigants during cleaning and sterilization procedures results in corrosion and surface deformation of the files, and this can lead to unexpected file fracture during clinical use. Thus, the investigation of effect of ethylenediaminetetraacetic acid (EDTA) and sodium hypochlorite (NaOCl) on surface topography of HyFlex files is important.
本研究的目的是使用原子力显微镜（AFM）比较次氯酸钠（NaOCl）和乙二胺四乙酸（EDTA）对HyFlex可控记忆（CM）锉和HyFlex电火花加工（EDM）锉的表面形貌和粗糙度的影响。将20支HyFlex EDM（25/.08）锉和20支HyFlex CM（25/.06）锉分为五组（n = 4）。一组作为阴性对照组。其他组的锉分别在37°C下暴露于5.25% NaOCl和17% EDTA溶液中5分钟和10分钟，每次暴露后使用AFM进行检查。使用单因素方差分析检验对数据进行分析。在HyFlex EDM锉的对照组中观察到最低值（p <.05）。在浸泡于EDTA 10分钟的HyFlex EDM锉和HyFlex CM锉中观察到最高值（p <.05）。总之，所测试的冲洗剂对镍钛锉的表面孔隙率有显著的负面影响。在清洁和消毒过程中将镍钛锉浸泡在冲洗剂中会导致锉的腐蚀和表面变形，这可能导致临床使用期间锉意外折断。因此，研究乙二胺四乙酸（EDTA）和次氯酸钠（NaOCl）对HyFlex锉表面形貌的影响很重要。
