BACKGROUND & AIMS:
:This study compared the in vitro efficacy of Smear Clear (Sybron Endo, CA), a 17% ethylenediaminetetraacetic acid (EDTA) solution with surfactants, to 17% EDTA, with and without the use of ultrasonics, in removal of the smear layer. Seventy-five extracted teeth, randomly distributed into 5 test groups, were prepared by using ProFile rotary instruments (Dentsply Maillefer, Ballaigues, Switzerland) and subjected to different final irrigating regimes; group A, 1% sodium hypochlorite; group B, 17% EDTA; group C, 17% EDTA with ultrasonics; group D, Smear Clear; and group E, Smear Clear with ultrasonics. Samples were examined under the scanning electron microscope and scored for debris and smear layer removal. Statistical analysis showed that groups D and E did not perform significantly better than groups B and C. Group C performed significantly better than group B. Addition of surfactants to EDTA in Smear Clear did not result in better smear layer removal. The use of ultrasonics with 17% EDTA improved smear layer removal.
背景与目标:
: 这项研究比较了具有表面活性剂的17% 乙二胺四乙酸 (EDTA) 溶液涂片清除 (Sybron Endo,CA) 在去除涂片层时17% EDTA的体外功效。使用轮廓旋转仪器 (Dentsply Maillefer,Ballaigues,瑞士) 制备75颗拔牙,随机分为5个测试组,并进行不同的最终灌溉方案; A组,1% 次氯酸钠; B组,17% EDTA; C组,用超声波17% EDTA; D组,涂片清晰; 和E组,用超声波涂片清晰。在扫描电子显微镜下检查样品,并对碎片和涂抹层去除进行评分。统计分析显示,D组和E组的表现并不明显优于B组和C组。C组的表现明显优于B组。在涂片中向EDTA中添加表面活性剂不会导致更好的涂片层去除。使用具有17% EDTA的超声波改善了涂抹层的去除。