Jasrotia Ankush, Bhagat Kanchan, Bhagat Neeru, Bhagat Ravinder K
Department of Conservative Dentistry and Endodontics, Indira Gandhi Government Dental College and Hospital, Jammu, Jammu and Kashmir, India.
MDS in Orthodontics, Private Practioner, Jammu, India.
J Int Soc Prev Community Dent. 2019 Nov 14;9(6):630-636. doi: 10.4103/jispcd.JISPCD_267_19. eCollection 2019 Nov-Dec.
This study was conducted to compare smear layer removal by five different irrigation techniques-conventional needle irrigation (CI), manual dynamic activation (MDA), passive ultrasonic irrigation (PUI), sonic irrigation (SI), and negative apical pressure (NAP).
Fifty freshly extracted mandibular first premolars were cleaned and shaped by One Curve rotary files and 3% sodium hypochlorite and 17% ethylenediaminetetraacetic acid. The samples were divided into five equal groups ( = 10), according to the final irrigation activation technique: Group I, CI; Group II, MDA; Group III, PUI; Group IV, SI; and Group V, NAP. The samples were prepared and observed under a scanning electron microscope. The photomicrographs were recorded and evaluated with a scoring system.
Group I and Group II had the highest scores, which showed a statistically significant difference between the other groups ( < 0.05). This was followed by PUI, NAP, and SI.
Final irrigation activation with SI and NAP resulted in the better removal of smear layer when compared to that with other groups.
本研究旨在比较五种不同冲洗技术——传统针头冲洗（CI）、手动动态激活冲洗（MDA）、被动超声冲洗（PUI）、声波冲洗（SI）和根尖负压冲洗（NAP）——去除玷污层的效果。
选取50颗新鲜拔除的下颌第一前磨牙，用One Curve旋转锉以及3%次氯酸钠和17%乙二胺四乙酸进行清理和预备。根据最终冲洗激活技术，将样本平均分为五组（每组 = 10）：第一组，CI；第二组，MDA；第三组，PUI；第四组，SI；第五组，NAP。样本经制备后在扫描电子显微镜下观察。拍摄显微照片并采用评分系统进行评估。
第一组和第二组得分最高，与其他组相比差异具有统计学意义（ < 0.05）。其次是PUI、NAP和SI。
与其他组相比，SI和NAP进行最终冲洗激活时，玷污层去除效果更佳。
