Department of Conservative Dentistry and Endodontics, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India.
Department of Conservative Dentistry and Endodontics, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Manipal, Karnataka, India.
J Endod. 2018 Jul;44(7):1186-1190. doi: 10.1016/j.joen.2018.04.009. Epub 2018 Jun 1.
Sodium hypochlorite (NaOCl) is the main irrigant to clean root canals. Decalcifying agents are advocated as additional means to condition the root dentin. The aim of this study was to evaluate the effect of alternating (EDTA) or continuous 1-hydroxyethane 1,1-diphosphonic (HEDP) chelation in conjunction with NaOCl irrigation on the pushout bond strength of Biodentine (Septodont, Saint Maur des Fosses, France).
Single root canals of 50 extracted, mature human teeth were divided into 5 groups (n = 10) and enlarged using rotary instruments. Canals were irrigated with 5 mL irrigant after each instrument and then with 5 mL after mechanical preparation as follows: 2.5% NaOCl during and then 2.5% NaOCl, 17% EDTA, or 17% EDTA followed by 2.5% NaOCl after preparation. Continuous chelation with 2.5% NaOCl/9% Dual Rinse HEDP (Medcem GmbH, Weinfelden, Switzerland) during and after preparation. The control group was irrigated with water during and after preparation. Canals were then filled with Biodentine. A horizontal section of 1.5-mm thickness was taken from the middle root third, and a pushout bond test was performed. Data were statistically analyzed using 1-way analysis of variance/Tukey honest significant different test.
The pushout bond strength of Biodentine was significantly higher when the root canal was irrigated with 2.5% NaOCl/9% Dual Rinse HEDP (19.6 ± 2.3 MPa) than with NaOCl alone (15.5 ± 1.5 MPa) or the NaOCl/EDTA sequences (15.7 ± 2.2 MPa and 16.9 ± 2.9 MPa) (P < .05), which did not differ among each other (P > .05). The lowest pushout bond strength values were found with water irrigation (11.5 ± 0.5 MPa) (P < .05 to all other groups).
Irrigation with 2.5% NaOCl/9% Dual Rinse HEDP significantly improved the pushout bond strength of Biodentine to the root canal dentin.
次氯酸钠（NaOCl）是清洁根管的主要冲洗液。提倡使用脱钙剂作为处理根管牙本质的附加手段。本研究旨在评估交替（EDTA）或连续 1-羟基亚乙基 1,1-二膦酸（HEDP）螯合与 NaOCl 冲洗联合使用对 Biodentine（圣莫里斯德福斯，法国赛普敦）的推出粘结强度的影响。
将 50 个提取的成熟人牙齿的单根管分为 5 组（n=10），并用旋转器械扩大。每次器械后用 5ml 冲洗液冲洗根管，然后用 5ml 冲洗液冲洗机械准备后，如下所示：在准备期间和之后使用 2.5% NaOCl，然后使用 2.5% NaOCl，17% EDTA 或 17% EDTA 后再进行准备。在准备期间和之后使用 2.5% NaOCl/9%双冲洗 HEDP（Medcem GmbH，魏因费尔登，瑞士）连续螯合。对照组在准备期间和之后用清水冲洗。然后用 Biodentine 填充根管。从中根的第三分之一处取出 1.5mm 厚的水平截面，并进行推出粘结试验。使用单向方差分析/Tukey 诚实显著差异检验对数据进行统计分析。
与单独使用 NaOCl（15.5±1.5MPa）或 NaOCl/EDTA 序列（15.7±2.2MPa 和 16.9±2.9MPa）相比，用 2.5% NaOCl/9%双冲洗 HEDP 冲洗根管时，Biodentine 的推出粘结强度显着更高（19.6±2.3MPa）（P<0.05），彼此之间没有差异（P>0.05）。用清水冲洗时，推出粘结强度最低（11.5±0.5MPa）（P<0.05 至所有其他组）。
用 2.5% NaOCl/9%双冲洗 HEDP 冲洗可显着提高 Biodentine 对根管牙本质的推出粘结强度。
