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首页> 外文期刊>The Journal of Prosthetic Dentistry >Effect of surface conditioning on the retentive bond strengths of fiberreinforced composite posts.
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Effect of surface conditioning on the retentive bond strengths of fiberreinforced composite posts.

机译：表面处理对纤维增强复合材料桩的保持粘结强度的影响。

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STATEMENT OF PROBLEM: Debonding is a common cause of failure encountered with fiber-reinforced composite (FRC) posts, and usually occurs along the post space-dentin adhesive interface. Surface conditioning of posts is expected to increase the chemical and mechanical bond between the luting composite resin and the post, but the best method has not been definitively determined. PURPOSE: The purpose of this in vitro study was to compare the effects of 3 surface-conditioning methods on the retentive bond strengths of FRC posts using 5 composite resin materials, and compare results to those of unconditioned FRC posts as well. MATERIAL AND METHODS: Post space preparations (DentinPost ER root post system, length of 12 mm) were performed on 200 human anterior teeth. Groups of 50 FRC posts (ISO size 90) each were treated using 1 of the following conditioning methods: silanization, etching with 5% hydrofluoric acid, tribochemical coating (CoJet system), or were left untreated (control group). FRC posts (n=10) in each group were placed using 1 of 5 composite resin materials (Calibra or RelyX Unicem resin cements or Build-It, MultiCore Flow, or Rebilda DC foundation composite resins). Following water storage (37 degrees C, 24 hours) and thermal cycling (5000 cycles, 5 degrees -55 degrees C, 30-second dwell time), tensile strength testing was performed. Fracture modes were assessed using a light microscope. Data were analyzed statistically (1-way and 2-way ANOVA, Bonferroni-Dunn correction, alpha=.05). RESULTS: Retentive bond strengths of FRC posts luted with MultiCore Flow in combination with the CoJet system, and of posts inserted with Rebilda DC in combination with hydrofluoric acid (HF) etching as well as with the CoJet system, were significantly higher than those of the corresponding unconditioned FRC posts (P<.001). No significant differences were noted between the bond strength values of RelyX Unicem with CoJet, MultiCore Flow with CoJet, and Rebilda DC with either CoJet or HF etching (P>.05). Retentive bond strengths were significantly lower for HF etching (Calibra, RelyX Unicem, Build-It), and for the treatment with the CoJet system in combination with Build-It compared to the corresponding control groups (P<.001). Fracture modes were primarily adhesive at the post surface or cohesive within the composite resin layer or within the FRC post. CONCLUSIONS: The retentive bond strengths differed significantly with respect to the tested combinations of conditioning method and luting composite resin.
机译：问题陈述：脱胶是纤维增强复合材料（FRC）桩遇到的常见故障原因，通常发生在桩空间-牙本质胶粘剂界面。预计对立柱进行表面处理可增加胶合复合树脂与立柱之间的化学和机械键合，但尚未确定最佳方法。目的：本体外研究的目的是比较使用5种复合树脂材料的3种表面调节方法对FRC桩保持力强度的影响，并将结果与​​未调节的FRC桩进行比较。材料与方法：在200颗人类前牙上进行了后空间准备（DentinPost ER根后系统，长度为12 mm）。使用以下条件处理方法之一处理50个FRC柱组（ISO尺寸90）：硅烷化，用5％氢氟酸蚀刻，摩擦化学涂层（CoJet系统）或不进行处理（对照组）。使用5种复合树脂材料（Calibra或RelyX Unicem树脂水泥或Build-It，MultiCore Flow或Rebilda DC基础复合树脂）中的每一种放置FRC桩（n = 10）。储水（37摄氏度，24小时）和热循环（5000次循环，5摄氏度-55摄氏度，停留时间为30秒）之后，进行了拉伸强度测试。使用光学显微镜评估骨折模式。对数据进行统计分析（1路和2路方差分析，Bonferroni-Dunn校正，alpha = .05）。结果：与MultiJet Flow结合使用CoJet系统的FRC桩和与Rebilda DC结合氢氟酸（HF）蚀刻以及CoJet系统插入的桩的保持力均显着高于FRC桩。相应的无条件FRC职位（P <.001）。带有CoJet的RelyX Unicem，带有CoJet的MultiCore Flow以及带有CoJet或HF蚀刻的Rebilda DC的粘合强度值之间均未发现明显差异（P> .05）。与相应的对照组相比，HF蚀刻（Calibra，RelyX Unicem，Build-It）以及与CoJet系统结合Build-It进行处理时，保持力明显降低（P <.001）。断裂模式主要是在柱表面粘合或在复合树脂层或FRC柱内粘合。结论：相对于调节方法和浸胶复合树脂的测试组合，保持粘结强度存在显着差异。

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