Dental Materials and Restorative Dentistry, Tuscany School of Dental Medicine, University of Florence and Siena, Department of Public Health, Dentistry, University of Florence, Italy.
Int Endod J. 2012 Mar;45(3):249-56. doi: 10.1111/j.1365-2591.2011.01969.x. Epub 2011 Oct 19.
To compare by means of a push-out test the interfacial strength of a dual-curing resin cement and a light-curing self-adhering resin composite when used in translucent fibre post cementation.
Thirty-four extracted human premolars with single canals were selected and root filled. Translucent fibre posts (RelyX Fiber Post) were luted into the root canal using two resinous luting systems (n = 17). Dual-Curing Technique (DC): the specimens were treated with Excite DSC and RelyX ARC, which were light-cured simultaneously through the post for 60 s. Light-Curing Self-Adhering Technique (LCSA): the specimens were treated with Vertise Flow, which was light-cured through the post for 60 s. The specimens were sectioned transversally into six slices to perform the push-out test at the coronal, middle and apical regions of the root canals. Data were analysed by two-way anova. All specimens were analysed by stereomicroscopy and SEM to determine fracture patterns.
There were no significant differences between the DC and LCSA techniques (P = 0.703) in any of the canal regions. Root region was not a significant factor for push-out values (P = 0.255) and group-region interactions were not significant (P = 0.740). For the DC technique, the majority of the fracture patterns (73.3%) were adhesive at the interface between dual-curing resin cement and adhesive. For the LCSA technique, the majority of the fracture patterns (71.7%) were adhesive at the interface between light-curing self-adhering resin composite and dentine.
The interfacial strength between light-curing self-adhering resin composite and root canal walls is equivalent to the interfacial strength between dual-curing cement and root canal walls.
通过推出试验比较两种树脂水门汀（双固化树脂水门汀和光固化自粘接树脂复合材料）在半透明纤维桩黏固中的界面结合强度。
选择 34 颗具有单根管的人离体前磨牙，根管充填后，使用两种树脂黏结系统（n = 17）黏固半透明纤维桩（RelyX Fiber Post）。双固化技术（DC）：通过纤维桩同时对试件进行 Excite DSC 和 RelyX ARC 处理，光固化 60s。光固化自粘接技术（LCSA）：通过纤维桩对试件进行 Vertise Flow 处理，光固化 60s。将试件横断为 6 个部分，在根管的冠、中、根尖部进行推出试验。采用双因素方差分析对数据进行分析。所有试件均进行体视显微镜和扫描电镜分析，以确定断裂模式。
在根管的任何区域，DC 和 LCSA 技术之间均无显著差异（P = 0.703）。根区不是推出值的显著因素（P = 0.255），组-区相互作用也不显著（P = 0.740）。对于 DC 技术，大多数断裂模式（73.3%）为双固化树脂水门汀与黏结剂之间的黏附性断裂。对于 LCSA 技术，大多数断裂模式（71.7%）为光固化自粘接树脂复合材料与牙本质之间的黏附性断裂。
光固化自粘接树脂复合材料与根管壁之间的界面结合强度与双固化水门汀与根管壁之间的界面结合强度相当。
