Chou Kenny, George Roy, Walsh Laurence J
School of Dentistry and Oral Health, Griffith University, Southport, Queensland, Australia.
Aust Endod J. 2014 Apr;40(1):21-5. doi: 10.1111/aej.12055. Epub 2013 Dec 13.
This study aimed to compare the effectiveness of different intracanal irrigation techniques in removing intracanal medicaments prior to obturation. A total of 168 single roots were prepared with ProTaper® rotary files and medicament pastes applied (Ledermix®, Odontopaste®, Doxypaste and Pulpdent®), left in for 2 weeks, then removed using filing followed by one of four methods: irrigation with an open-ended notched irrigation needle (Appli-Vac) either at the working length or 5 mm from the canal orifice, or the Max-I-probe or EndoActivator® at the working length. Following the removal of medicaments, the roots were split into two and the internal surfaces photographed, for digital image analysis of the overall percentage of residual medicament. With the exception of canals irrigated 5 mm apical to the root canal orifice, all four irrigation techniques achieved an average of 95% for removal of Ledermix®, Odontopaste® and Doxypaste. Calcium hydroxide paste was the most difficult medicament to remove, with no difference between irrigation techniques. Up to 27% of the Pulpdent® material remained after irrigation. No irrigation technique could completely remove all traces of medicaments. The position of the irrigational needle and the type of medicament used are key factors, which influence the effectiveness of irrigation in removing medicaments.
本研究旨在比较不同根管冲洗技术在根管充填前去除根管内药物的效果。总共168个单根牙管用ProTaper®旋转锉预备，并用药物糊剂（Ledermix®、Odontopaste®、Doxypaste和Pulpdent®）处理，放置2周，然后先用锉去除，再采用以下四种方法之一冲洗：使用开口有槽冲洗针（Appli-Vac）在工作长度或距根管口5毫米处冲洗，或在工作长度处使用Max-I-probe或EndoActivator®冲洗。去除药物后，将牙根劈开，拍摄内表面照片，用于对残留药物的总体百分比进行数字图像分析。除了在根管口根尖5毫米处冲洗的根管外，所有四种冲洗技术对Ledermix®、Odontopaste®和Doxypaste的去除平均达到95%。氢氧化钙糊剂是最难去除的药物，不同冲洗技术之间没有差异。冲洗后，高达27%的Pulpdent®材料残留。没有一种冲洗技术能完全去除所有药物痕迹。冲洗针的位置和所用药物的类型是影响冲洗去除药物效果的关键因素。
