Dotto Sidney Ricardo, Travassos Rosana Maria Coelho, de Oliveira Elias Pandonor Motcy, Machado Manoel Eduardo de Lima, Martins José Luiz
Centro de Pesquisas Odontologicas Sao Leopoldo Mandic, Rua José Rocha Junqueira 13, CEP 13045-755 Campinas, SP, Brazil.
Aust Endod J. 2007 Aug;33(2):62-5. doi: 10.1111/j.1747-4477.2007.00048.x.
The purpose of this in vitro study was to compare the efficacy of 24% ethylenediaminetetraacetic acid (EDTA) gel and 17% EDTA solution in cleaning dentine walls after root canal instrumentation. Thirty human canine teeth were divided into three groups of 10 teeth each. In Group 1, 1% sodium hypochlorite was used as the irrigating solution; in Group 2, 1% sodium hypochlorite was used with 17% EDTA solution; and in Group 3, 1% sodium hypochlorite was used with 24% EDTA gel. The presence of a smear layer was analysed after instrumentation using scanning electron microscopy. The Kruskal-Wallis test revealed a statistical difference (P < 0.05) between Groups 1 and 2, and also between Groups 1 and 3. No difference was observed between Groups 2 and 3 (P > 0.05). The results indicate that 1% sodium hypochlorite alone does not remove the smear layer and that there was no statistical difference between EDTA gel and EDTA solution in smear layer removal.
本体外研究的目的是比较24%乙二胺四乙酸（EDTA）凝胶和17%EDTA溶液在根管预备后清洁牙本质壁的效果。30颗人犬齿被分为三组，每组10颗牙齿。第1组使用1%次氯酸钠作为冲洗液；第2组使用1%次氯酸钠和17%EDTA溶液；第3组使用1%次氯酸钠和24%EDTA凝胶。使用扫描电子显微镜分析预备后玷污层的存在情况。Kruskal-Wallis检验显示第1组和第2组之间以及第1组和第3组之间存在统计学差异（P<0.05）。第2组和第3组之间未观察到差异（P>0.05）。结果表明，单独使用1%次氯酸钠不能去除玷污层，并且在去除玷污层方面，EDTA凝胶和EDTA溶液之间没有统计学差异。
