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Quantitative Comparison of Calcium Hydroxide Removal by EndoActivator, Ultrasonic and ProTaper File Agitation Techniques: An in vitro Study

查看全文 作　　者：Huda Yasir [1,2]Khaleel;Ahmed Jawad Al-[1,2]Ashaw;[1]杨焰;[1]逄爱慧;[1]马净植 高影响力作者 机构地区：[1]Department of Stomatology,Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology;[2]Conservative Department,College of Dentistry,Mosul University高影响力机构 出　　处：《Journal of Huazhong University of Science and Technology(Medical Sciences)》索引2013年第33卷第1期,共4页高影响力期刊 摘　　要：Calcium hydroxide (CH) dressing residues can compromise endodontic sealing. This study aimed to evaluate the amount of remaining CH in root canals after mechanical removal by four groups of irrigation techniques including needle irrigation only, ProTaper file, EndoActivator, and ultrasonic file. Fifteen extracted single-rooted teeth were collected and used for all four groups. The samples were firstly prepared by ProTaper rotary instruments, and then sectioned longitudinally through the long axis of the root canals, followed by final reassembling by wires. CH was kept in the canals for 7 days setting. The removal procedure began with 5 mL of 2.5% sodium hypochlorite (NaOCl) followed by 1 mL of 17% ethylenediaminetetraacetic acid and a final irrigation with 5 mL of 2.5% NaOCl solution for all groups. No additional agitation of the irrigant was performed in group 1, while agitation for 20 s between irrigants was done with F2 ProTaper rotary file in group 2, EndoActivator with tip size 25/.04 in group 3 and by an ultrasonic file 25/.02 in group 4. The total activation time was 60 s. The roots were then disassembled and captured by digital camera. The ratio of CH coated surface area to the surface area of the whole canal as well as each third of the canal was calculated. The data were statistically analyzed by one-way ANOVA using post hoc Tukey test. Results showed that none of the four techniques could remove all CH. No significant difference was found between EndoActivator and ultrasonic techniques. However, they both removed significantly more CH than ProTaper and needle irrigation (P=0.0001). In conclusion, the sonic and ultrasonic agitation techniques were more effective in removing intracanal medicaments than the ProTaper rotary file and needle irrigation in all thirds of the canal. 关 键 词：搅拌技术 氢氧化钙 超声波 文件 单因素方差分析 灌溉技术 量比 体外
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