Mishra Pankaj, Sharma Anjna, Mishra Sunil, Gupta Manas
MDS, Senior Lecturer , Department of Conservative Dentistry and Endodontics, Rishiraj College of Dental Sciences and Research Centre, Bhopal, Madhya Pradesh, India.
MDS, Post Graduate student , Department of Conservative Dentistry and Endodontics, Rishiraj College of Dental Sciences and Research Centre, Bhopal, Madhya Pradesh, India.
J Clin Exp Dent. 2017 Jun 1;9(6):e733-e737. doi: 10.4317/jced.53647. eCollection 2017 Jun.
The key to success of any root canal therapy is adequate obturation of the prepared root canal space. Root canal sealers are not dimensionally stable and might dissolve partially over a period of time. The objective of this study is to evaluate the push-out bond strength to intraradicular dentin of two endodontic obturation materials.
Forty extracted single rooted permanent teeth were used. Canals orifice was explored, teeth were instrumented. The samples were divided into two groups each containing twenty specimens obturated with different obturation material (Group1 Epiphany/Resilon and Group 2 Gutta Percha/AH Plus).The obturation systems used in this study was Element Obturation unit (Sybron Endo). Each tooth root was horizontally sectioned in approximately 2-mm thick slices from the coronal 1/3rd, middle 1/3rd and apical 1/3rd. The push-out bond strength of each specimen was calculated using Universal Testing Machine. The statistical analysis was done using two way analysis of variance (ANOVA) and tukey's test.
There was significant difference between push out bond strength of Resilon/Epiphany and AH Plus/Gutta Percha. Gutta percha group was superior with push out bond strength of 2.22 (± 0.16) Mpa in comparison to Resilon/Epiphany group with 1.61 (±0.14) Mpa (<0.001).
The interfacial bond strength achieved with Resilon/Epiphany self-etch (SE) to intraradicular dentine was not superior to that of AH Plus/Gutta Percha. AH Plus, Apical leakage, Epiphany, Gutta percha, Push-out test Resilon.
任何根管治疗成功的关键在于对预备后的根管空间进行充分的充填。根管封闭剂尺寸不稳定，可能会在一段时间内部分溶解。本研究的目的是评估两种根管充填材料与根管内牙本质之间的推出粘结强度。
使用40颗拔除的单根恒牙。探查根管口，对牙齿进行预备。将样本分为两组，每组20个样本，分别用不同的充填材料进行充填（第1组为Epiphany/Resilon，第2组为牙胶尖/AH Plus）。本研究中使用的充填系统为Element Obturation unit（Sybron Endo）。将每个牙根从冠方1/3、中部1/3和根尖1/3水平切成约2毫米厚的薄片。使用万能试验机计算每个样本的推出粘结强度。采用双向方差分析（ANOVA）和Tukey检验进行统计分析。
Resilon/Epiphany和AH Plus/牙胶尖的推出粘结强度之间存在显著差异。牙胶尖组的推出粘结强度更高，为2.22（±0.16）MPa，而Resilon/Epiphany组为1.61（±0.14）MPa（<0.001）。
Resilon/Epiphany自酸蚀（SE）与根管内牙本质之间的界面粘结强度并不优于AH Plus/牙胶尖。AH Plus、根尖微渗漏、Epiphany、牙胶尖、推出试验、Resilon 。
