Souza Matheus Albino, Pazinatto Bianca, Bischoff Karolina Frick, Palhano Huriel Scartazzini, Cecchin Doglas, de Figueiredo José Antônio Poli
School of Dentistry, University of Passo Fundo, Passo Fundo, RS, Brazil.
School of Dentistry, University of Passo Fundo, Passo Fundo, RS, Brazil.
Photodiagnosis Photodyn Ther. 2017 Mar;17:216-220. doi: 10.1016/j.pdpdt.2016.12.011. Epub 2017 Jan 5.
The aim of the present study was to evaluate the influence of ultrasonic activation (US) of the final irrigant in the removal of the photosensitizer from root canal walls after photodynamic therapy.
The root canals of 60 single-rooted bovine extracted teeth were filled with 0.01% methylene blue and submitted to photodynamic therapy for 90s. After that, the roots were divided into six groups (n=10) according to the final irrigation protocol: distilled water (DW), DW+US, 17% EDTA, QMix, EDTA+US, and QMix+US. Then, the samples were submitted to scanning electron microscopy where a scoring system was used to evaluate the images and effectiveness of proposed treatments in the cervical, middle and apical regions of the root canals. The data were statistically analyzed by the Kruskal-Wallis and Mann-Whitney U tests for intergroup comparisons as well as the Wilcoxon and Friedman tests for intragroup comparisons at 5% of significance.
The 17% EDTA+US and QMix+US treatments were most effective in the removal of the photosensitizer in all regions of the root canal; the difference was statistically significant when compared to all other groups (p<0.05). There were no significant differences in the intragroup analysis comparing the effectiveness in the different regions of the same group (p<0.05).
US can aid 17% EDTA and QMix in removing the photosensitizer after photodynamic therapy and contributes to cleaning root canal walls.
本研究的目的是评估最终冲洗液的超声激活（US）对光动力治疗后根管壁上光敏剂清除的影响。
60颗单根牛离体牙的根管用0.01%亚甲蓝充填，并进行90秒的光动力治疗。之后，根据最终冲洗方案将牙根分为六组（n = 10）：蒸馏水（DW）、DW + US、17%乙二胺四乙酸（EDTA）、QMix、EDTA + US和QMix + US。然后，将样本进行扫描电子显微镜检查，使用评分系统评估根管颈段、中段和根尖段所建议治疗的图像和效果。数据采用Kruskal - Wallis检验和Mann - Whitney U检验进行组间比较，以及采用Wilcoxon检验和Friedman检验进行组内比较，显著性水平为5%。
17% EDTA + US和QMix + US治疗在根管所有区域对光敏剂的清除最为有效；与所有其他组相比，差异具有统计学意义（p < 0.05）。在同一组不同区域有效性的组内分析中，没有显著差异（p < 0.05）。
超声激活可辅助17% EDTA和QMix在光动力治疗后清除光敏剂，并有助于清洁根管壁。
