Nagas Emre, Cehreli Zafer, Uyanik Mehmet Ozgur, Durmaz Veli
Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
Department of Pediatric Dentistry, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
Braz Oral Res. 2014;28. doi: 10.1590/1807-3107bor-2014.vol28.0046. Epub 2014 Sep 15.
The aim of this study was to evaluate the influence of a calcium silicate-based sealer (iRoot SP), with or without a core material, on bond strength to radicular dentin, in comparison with various contemporary root filling systems. Root canals of freshly extracted single-rooted teeth (n = 60) were instrumented using rotary instruments. The roots were randomly assigned to one of the following experimental groups: (1) a calcium silicate-based sealer without a core material (bulk-fill); (2) a calcium silicate-based sealer + gutta-percha; (3) a calcium silicate-based sealer + Resilon; (4) a methacrylate resin-based sealer (RealSeal SE) + Resilon; (5) an epoxy resin-based sealer (AH Plus) + gutta-percha, and (6) a mineral trioxide aggregate-based endodontic sealer (MTA Fillapex) + gutta-percha. Four 1-mm-thick sections were obtained from the coronal aspect of each root (n = 40 slices/group). Push-out bond strength testing was performed at a cross-head speed of 1 mm/min, and the bond strength data were analyzed statistically by one-way analysis of variance and Tukey tests (p < 0.05). The highest and lowest debonding values were obtained for the calcium silicate-based sealer bulk-fill and mineral trioxide aggregate-based endodontic sealer + gutta-percha groups, respectively (p < 0.05). It was concluded that the calcium silicate-based sealer showed higher resistance to dislocation in the bulk-filled form than in conjunction with the tested core filling materials. When the calcium silicate-based sealer was placed in bulk, its dislocation resistance was similar to that of commonly used sealer + core root filling systems. Thus, the concept of using a calcium silicate-based sealer in bulk can be more easily advocated in clinical practice.
本研究的目的是评估一种基于硅酸钙的封闭剂（iRoot SP），无论有无核心材料，与各种当代根管充填系统相比，对牙根牙本质粘结强度的影响。使用旋转器械对新鲜拔除的单根牙（n = 60）的根管进行预备。将牙根随机分配到以下实验组之一：（1）无核心材料的基于硅酸钙的封闭剂（大容量充填）；（2）基于硅酸钙的封闭剂 + 牙胶；（3）基于硅酸钙的封闭剂 + 热塑性树脂；（4）基于甲基丙烯酸酯树脂的封闭剂（RealSeal SE） + 热塑性树脂；（5）基于环氧树脂的封闭剂（AH Plus） + 牙胶，以及（6）基于三氧化矿物凝聚体的根管封闭剂（MTA Fillapex） + 牙胶。从每个牙根的冠方获取四个1毫米厚的切片（每组n = 40个切片）。以1毫米/分钟的十字头速度进行推出粘结强度测试，并通过单因素方差分析和Tukey检验对粘结强度数据进行统计学分析（p < 0.05）。基于硅酸钙的封闭剂大容量充填组和基于三氧化矿物凝聚体的根管封闭剂 + 牙胶组分别获得了最高和最低的脱粘值（p < 0.05）。得出的结论是，基于硅酸钙的封闭剂在大容量充填形式下比与测试的核心充填材料结合时表现出更高的抗脱位性。当基于硅酸钙的封闭剂大容量放置时，其抗脱位性与常用的封闭剂 + 核心根管充填系统相似。因此，在临床实践中更容易提倡使用大容量的基于硅酸钙的封闭剂这一概念。
