In vivo debridement efficacy of ultrasonic irrigation following hand-rotary instrumentation in human mandibular molars
In vivo debridement efficacy of ultrasonic irrigation following hand-rotary instrumentation in human mandibular molars
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DOI：
10.1097/01.don.0000137651.01496.48
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发表时间：
2005-03-01
影响因子：
4.2
通讯作者：
Beck, M
中科院分区：
文献类型：
--
作者：
Gutarts, R;Nusstein, J;Beck, M
本研究从组织学上比较了活下颌磨牙近中根管中手动/旋转根管预备与手动/旋转/超声技术的体内清创效果。第1组由16颗牙齿组成，采用手动/旋转技术制备，而第2组由15颗牙齿组成，以类似的方式制备，但随后对每个根管进行1分钟的超声冲洗，使用MiniEndo装置中的超声针。五个未器械下颌磨牙作为组织学对照。浸提和组织学制备后，从1- 3-mm顶端水平每0.2 mm取0.5 μ m横截面，评价组织去除百分比。非参数分析显示，除一个水平外，第2组在所有评价水平的平均髓腔和峡部清洁度百分比值均显著较高。总之，在手动/旋转器械后使用超声针1分钟导致下颌磨牙近中根管和峡部明显更清洁。
This study histologically compared the in vivo debridement efficacy of hand/rotary canal preparation versus a hand/rotary/ultrasound technique in mesial root canals of vital mandibular molars. Group 1 consisted of 16 teeth prepared with a hand/rotary technique whereas group 2 consisted of 15 teeth prepared in similar fashion but followed by 1 min of ultrasonic irrigation, per canal, utilizing an ultrasonic needle in a MiniEndo unit. Five uninstrumented mandibular molars served as histologic controls. After extraction and histologic preparation, 0.5 mum cross-sections, taken every 0.2 mm from the 1- to 3-mm apical levels, were evaluated for percentage of tissue removal. Nonparametric analysis revealed mean percent canal and isthmus cleanliness values to be significantly higher for group 2 at all levels evaluated, except one. in conclusion, the 1 min use of the ultrasonic needle after hand/rotary instrumentation resulted in significantly cleaner canals and isthmuses in the mesial roots of mandibular molars.