Srivastava Ankita, Yadav Deepa S, Rao Murali, Rao H Murali, Arun A, Siddique Riluwan
Department of Conservative Dentistry and Endodontics, D.A. Pandu Memorial R V Dental College, Bengaluru, Karnataka, India.
Department of Conservative Dentistry and Endodontics, Saveetha Dental College, Saveetha Institute of Medical and Technical Science, Saveetha University, Chennai, Tamil Nadu, India.
J Conserv Dent. 2020 Jan-Feb;23(1):26-31. doi: 10.4103/JCD.JCD_223_20. Epub 2020 Oct 10.
The aim of this study was to compare push-out bond strength of root canal spaces filled with AH-Plus and BioRoot RCS after using different irrigants.
Eighty single-rooted teeth were decoronated and endodontically treated by crown-down technique using ProTaper Universal rotary files progressively till F4 (40/0.06). Samples were divided into two groups according to the sealer ( = 40): Group A = BioRoot RCS, Group B = AH Plus, further subdivided into four subgroups according to irrigation protocol ( = 10): Group 1A, 1B - 0.9% saline, Group 2A, 2B - 5.25% NaOCl + 17% EDTA, Group 3A, 3B- 17% EDTA +2% chlorhexidine, and Group 4A, 4B - 17% EDTA + 3% green tea extract. Samples were obturated with sealers and prepared for push-out test with root slices of 2 mm thickness using universal testing machine. Data were statistically analyzed using two-way ANOVA, Bonferroni's analysis, and independent Student's -test.
BioRoot RCS exhibited significantly higher push-out bond strength ( < 0.001). The interaction between irrigants and sealer showed higher bond strength for BioRoot RCS when 17% EDTA+ green tea was used.
Within the limitation of the study, it was concluded that bond strength of a sealer was influenced by the irrigants used.
本研究旨在比较使用不同冲洗剂后，用AH-Plus和BioRoot RCS充填的根管空间的推出粘结强度。
80颗单根牙去冠，采用冠向下技术，使用ProTaper通用旋转锉逐步预备根管直至F4（40/0.06），然后进行根管治疗。根据封闭剂将样本分为两组（每组n = 40）：A组 = BioRoot RCS，B组 = AH Plus，再根据冲洗方案进一步细分为四个亚组（每组n = 10）：1A、1B组 - 0.9%生理盐水，2A、2B组 - 5.25%次氯酸钠+17%乙二胺四乙酸，3A、3B组 - 17%乙二胺四乙酸+2%氯己定，4A、4B组 - 17%乙二胺四乙酸+3%绿茶提取物。样本用封闭剂进行根管充填，并使用万能试验机对2mm厚的根切片进行推出试验。数据采用双向方差分析、Bonferroni分析和独立样本t检验进行统计学分析。
BioRoot RCS表现出显著更高的推出粘结强度（P < 0.001）。当使用17%乙二胺四乙酸+绿茶时，冲洗剂与封闭剂之间的相互作用显示BioRoot RCS的粘结强度更高。
在本研究的局限性范围内，得出封闭剂的粘结强度受所用冲洗剂影响的结论。
