表面活性剂对次氯酸钠清除硬组织碎屑的影响。
The influence of the addition of surfactants to sodium hypochlorite on the removal of hard tissue debris.
机构信息
Department of Endodontics, Federal University of Pará, Belém, Brazil.
Department of Endodontics, Fluminense Federal University, Niterói, Brazil.
出版信息
Int Endod J. 2020 Aug;53(8):1131-1139. doi: 10.1111/iej.13307. Epub 2020 May 14.
AIM
To evaluate the effect of the addition of surfactants to sodium hypochlorite (NaOCl) on the removal of accumulated hard tissue debris (AHTD), before and after final irrigation with 17% EDTA, from mesial canals of mandibular molars through microcomputed tomographic (micro-CT) analysis.
METHODOLOGY
Thirty moderately curved mandibular mesial roots with Vertucci type II canal configuration were selected and scanned in a micro-CT device at an isotropic resolution of 22.9 μm. The specimens were assigned to three groups (n = 10) with respect to the root length, degree of curvature of the mesial root, volume and 3D anatomy of the root canals according to the irrigating solution used during root canal preparation: 2.5% NaOCl and 0.1% Benzalkonium Chloride, 2.5% NaOCl and 0.1% Tween 80 and 2.5% NaOCl without additives. The root canals were instrumented up to Reciproc R25 instrument. Then, the specimens were scanned again after canal preparation and after final irrigation with 17% EDTA, and the registered data sets were examined to evaluate the percentage of AHTD. For comparison between the different groups before and after using 17% EDTA, the Kruskal-Wallis test was used with a significance level of 5%. For comparison between the same groups before and after using 17% EDTA, the Wilcoxon test was used with a significance level of 5%.
RESULTS
None of the irrigant solutions tested was able to completely eliminate hard tissue debris from mesial canals of mandibular molars. There were no significant differences in the percentage of AHTD amongst the different irrigation solutions (P > 0.05). Final irrigation with 17% EDTA significantly reduced the percentage of AHTD (P < 0.05), without differences amongst the groups (P > 0.05).
CONCLUSIONS
The addition of surfactants to NaOCl did not affect the removal of AHTD from mesial canals of extracted mandibular molars. Final irrigation with 17% EDTA significantly improved AHTD removal.
目的
通过微计算机断层扫描（micro-CT）分析，评估在使用 17%乙二胺四乙酸（EDTA）进行最终冲洗之前和之后，向次氯酸钠（NaOCl）中添加表面活性剂对下颌磨牙近中根管内已积累的硬质组织碎屑（AHTD）的清除效果。
方法
选择 30 个具有 Vertucci Ⅱ型根管形态的中度弯曲下颌近中根，并在微 CT 设备中以 22.9μm 的各向同性分辨率进行扫描。根据根管预备过程中使用的冲洗液，将标本分为三组（n=10），分别为：2.5% NaOCl 和 0.1%苯扎氯铵、2.5% NaOCl 和 0.1%吐温 80、2.5% NaOCl 无添加剂。根管预备至 Reciproc R25 器械。然后，在根管预备后和用 17% EDTA 进行最终冲洗后再次扫描标本，并检查已注册的数据组，以评估 AHTD 的百分比。为了比较使用 17% EDTA 前后不同组之间的差异，使用 Kruskal-Wallis 检验，显著性水平为 5%。为了比较使用 17% EDTA 前后同一组之间的差异，使用 Wilcoxon 检验，显著性水平为 5%。
结果
在所测试的冲洗液中，没有一种能完全清除下颌磨牙近中根管内的硬质组织碎屑。不同冲洗液之间的 AHTD 百分比没有显著差异（P>0.05）。用 17% EDTA 进行最终冲洗显著降低了 AHTD 的百分比（P<0.05），但各组之间没有差异（P>0.05）。
结论
向 NaOCl 中添加表面活性剂不会影响从下颌磨牙近中根管中清除 AHTD。用 17% EDTA 进行最终冲洗可显著提高 AHTD 的清除率。
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