Goel Shweta, Tewari Sanjay
Department of Conservative Dentistry and Endodontics, Postgraduate Institute of Medical Sciences, Rohtak, Haryana, India.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2009 Sep;108(3):465-70. doi: 10.1016/j.tripleo.2009.04.023. Epub 2009 Jul 3.
The aim of this study was to compare the effect of continuous, intermittent passive ultrasonic irrigation (PUI) and active scrubbing of irrigants with NaviTip FX (Ultradent, South Jordan, UT) in removing smear layer.
Forty single-rooted teeth were randomly divided into 5 test groups and subjected to final irrigation with 17% EDTA followed by 2.5% NaOCl for 1 minute each using different activation methods: no activation (control), brushing with NaviTip FX, continuous PUI with irrigant delivered at pulp chamber, continuous PUI with irrigant delivered through the ultrasonic unit, and intermittent PUI. Specimens were examined under scanning electron microscope, and the data were analyzed using Friedman 2-way analysis of variance, Kruskal-Wallis, and Mann-Whitney U tests.
NaviTip FX and intermittent PUI showed significantly lower smear score than other groups at the 3 mm level (P < .05).
Both brush and intermittent ultrasonic activation were effective in the removal of smear layer from the apical third.
本研究旨在比较连续、间歇性被动超声冲洗（PUI）以及使用NaviTip FX（Ultradent公司，美国犹他州南乔丹）主动刷洗冲洗液在去除玷污层方面的效果。
将40颗单根牙随机分为5个试验组，分别采用不同的激活方法，先用17%乙二胺四乙酸（EDTA）进行最终冲洗，随后各用2.5%次氯酸钠（NaOCl）冲洗1分钟：不激活（对照组）、用NaviTip FX刷洗、在髓腔输送冲洗液进行连续PUI、通过超声设备输送冲洗液进行连续PUI以及间歇性PUI。在扫描电子显微镜下检查标本，并使用弗里德曼双向方差分析、克鲁斯卡尔 - 沃利斯检验和曼 - 惠特尼U检验对数据进行分析。
在3毫米水平处，NaviTip FX和间歇性PUI的玷污层评分显著低于其他组（P <.05）。
刷洗和间歇性超声激活在去除根尖三分之一处的玷污层方面均有效。
