Effect of luting cement and thermomechanical loading on retention of glass fibre posts in root canals
Effect of luting cement and thermomechanical loading on retention of glass fibre posts in root canals
复制标题
粘固水泥和热机械载荷对玻璃纤维桩在根管中保留的影响。
DOI：
10.1016/j.jdent.2013.10.017
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发表时间：
2014-01-01
影响因子：
4.4
通讯作者：
Chen, Ji-hua
中科院分区：
文献类型：
--
作者：
Li, Xiao-jing;Zhao, San-jun;Chen, Ji-hua
目的：评估粘固水泥和热机械负荷对玻璃纤维桩在根管内固位的影响。方法：使用 RelyX 纤维桩对 144 颗单根人类前磨牙进行牙髓治疗和修复。根据所使用的水泥，牙齿分为四组（Fuji I、Fuji CEM、RelyX Unicem 和 RelyX ARC）。每组根据老化方法（立即测试和热机械加载后）进一步分为两个亚组。使用拉拔测试评估粘合强度。通过染料渗透定量检查微渗漏。使用扫描电子显微镜评估牙本质-水泥-桩粘合界面。采用双向方差分析（拉拔试验）和 Kruskal-Wallis 分析（微渗漏）对数据进行分析。结果：拉拔粘结强度和微渗漏受水泥类型和老化程度的显着影响。尽管 RelyX ARC 在热机械加载前表现出最高的粘结强度 (p < 0.05)，但该水泥的密封能力比 Fuji CEM 和 RelyX Unicem 中表现的差 (p < 0.05)。热机械加载后，Fuji I 和 Fuji CEM 组的拔出强度显着增加，而 RelyX ARC 组的拔出强度显着下降（p < 0.05）。老化后，Fuji CEM 的封闭能力明显优于两个树脂水门汀组 (p < 0.05)。结论：与其他水门汀相比，Fuji CEM 在热机械加载后表现出更高的拔出强度，并且与其他水门汀相比具有良好的封闭能力。临床意义：树脂改性玻璃离子水门汀用于将玻璃纤维桩粘合到根管牙本质时，具有实现长期固位的潜在优势。因此在临床上可推荐用于玻璃纤维桩的粘接。 (C) 2013 Elsevier Ltd. 保留所有权利。
Objectives: To evaluate the effect of luting cement and thermomechanical loading on the retention of glass fibre posts in root canals.Methods: One hundred and forty-four single-rooted human premolars were endodontically treated and restored with RelyX Fibre Posts. The teeth were divided into four groups according to the cements used (Fuji I, Fuji CEM, RelyX Unicem and RelyX ARC). Each group was further divided into two subgroups according to the method of ageing (immediately tested and after thermomechanical loading). Bond strength was evaluated using a pull-out test. Microleakage was examined quantitatively with dye penetration. The dentine-cement-post bonding interface was assessed using scanning electron microscopy. Data were analysed with two-way ANOVA (pull-out test) and Kruskal-Wallis analysis (microleakage).Results: The pull-out bond strength and microleakage were significantly affected by the type of cement and ageing. Although RelyX ARC showed the highest bond strength before thermomechanical loading (p < 0.05), the sealing ability of this cement was worse than those exhibited in Fuji CEM and RelyX Unicem (p < 0.05). After thermomechanical loading, pull-out strengths of Fuji I and Fuji CEM were significantly increased, whereas that of RelyX ARC group significantly decreased (p < 0.05). The sealing ability of Fuji CEM was significantly better than the two resin cement groups (p < 0.05) after ageing.Conclusion: Fuji CEM demonstrates increased pull-out strength after thermomechanical loading and favourable sealing ability compared with the other cements.Clinical significance: Resin-modified glass ionomer cements have the potential benefit of achieving long-term retention when used for luting glass fibre post to root canal dentine. So it may be recommended for the cementation of glass fibre post in clinics. (C) 2013 Elsevier Ltd. All rights reserved.