Leow Natalie, Abbott Paul, Castro Salgado Jacqueline, Firth Laura
School of Dentistry, University of Western Australia, Nedlands, Western Australia, Australia.
Aust Endod J. 2012 Dec;38(3):107-12. doi: 10.1111/j.1747-4477.2012.00368.x. Epub 2012 Jul 16.
Various methods are used to evaluate irrigants. The primary aim was to develop a model for preliminary testing of potential irrigants. The second aim was to investigate the effect of bicarbonate soda on smear layer by comparing it with ethylenediamine tetraacetic acid with cetrimide (EDTAC) and sodium hypochlorite (NaOCl). Extracted human single-canal teeth were halved, and a uniform filing method was used to create smear layer. The following solutions were then applied - distilled water (control), 1% NaOCl, 17% EDTAC and bicarbonate soda at concentrations of 1%, 5%, 10% and 15%. Some samples had multiple solutions in different sequences. Samples were examined by scanning electron microscopy. Representative images were scored based on the degree of smear layer remaining. Results were analysed with the SAS system, using the GENMOD procedure. Complete smear layer was found in samples treated with all solutions except EDTAC used alone. There were no significant differences between the sequences, EDTAC/NaOCl/EDTAC and NaOCl/EDTAC/NaOCl. There were no significant differences between groups with and without bicarbonate soda. In conclusion, the model was effective for testing chemical effects on solutions on smear layer. Bicarbonate soda did not remove smear layer and provided no additional cleaning effects after EDTAC and NaOCl.
人们使用各种方法来评估冲洗剂。主要目的是开发一种模型，用于对潜在冲洗剂进行初步测试。第二个目的是通过将碳酸氢钠与乙二胺四乙酸与西曲溴铵（EDTAC）和次氯酸钠（NaOCl）进行比较，来研究碳酸氢钠对玷污层的影响。将拔除的人类单根管牙齿切成两半，并采用统一的锉磨方法来形成玷污层。然后应用以下溶液——蒸馏水（对照）、1%的NaOCl、17%的EDTAC以及浓度为1%、5%、10%和15%的碳酸氢钠。一些样本以不同顺序使用了多种溶液。通过扫描电子显微镜对样本进行检查。根据残留玷污层的程度对代表性图像进行评分。使用SAS系统的GENMOD程序对结果进行分析。除单独使用EDTAC处理的样本外，在所有处理过的样本中均发现了完整的玷污层。EDTAC/NaOCl/EDTAC和NaOCl/EDTAC/NaOCl这两种顺序之间没有显著差异。使用和未使用碳酸氢钠的组之间没有显著差异。总之，该模型对于测试溶液对玷污层的化学作用是有效的。碳酸氢钠不能去除玷污层，在使用EDTAC和NaOCl后也没有提供额外的清洁效果。
