The in vivo evaluation of hand/rotary/ultrasound instrumentation in necrotic, human mandibular molars

被引:128
作者
Burleson, Aaron [1 ]
Nusstein, John [1 ]
Reader, Al [1 ]
Beck, Mike [1 ]
机构
[1] Ohio State Univ, Dept Endodont, Columbus, OH 43218 USA
关键词
biofilm; necrotic debris; ultrasonic irrigation; ultrasound;
D O I
10.1016/j.joen.2007.04.015
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
This in vivo, prospective, randomized, single-blinded study histologically compared biofilm/necrotic debridement efficiency of a hand/rotary technique versus a hand/rotary/1 min ultrasound technique in the mesial roots of necrotic, human mandibular molars. The hand/rotary group consisted of 20 mesial roots. The hand/rotary/ultrasound group consisted of 20 mesial roots prepared with the same hand/rotary technique followed by 1 min of ultrasonic irrigation, per canal, utilizing an ultrasonic needle in a MiniEndo (TM) unit. Following extraction, histologic preparation and staining, 0.2 mu m cross-sections from the 1- to 3-mm apical levels were evaluated for percentage of biofilm/necrotic debris removal. Cleanliness results at the 1-, 2- and 3-mm levels for the hand/rotary and hand/ rotary/ultrasound techniques, respectively, were: Canals, 80% versus 95%, 92% versus 99%, and 95% versus 100%; Isthmuses, 33% versus 83%, 31% versus 86%, 45% versus 91 %. Statistical analysis revealed mean percent canal and isthmus cleanliness values to be significantly higher for hand/rotary/ultrasound technique at all levels evaluated.
引用
收藏
页码:782 / 787
页数:6
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