Radovic Ivana, Monticelli Francesca, Goracci Cecilia, Cury Alvaro Hafiz, Coniglio Ivanovic, Vulicevic Zoran R, Garcia-Godoy Franklin, Ferrari Marco
Clinic for Pediatric and Preventive Dentistry, Faculty of Dentistry, University of Belgrade, Dr. Subotica 11, Beograd 11000, Serbia.
J Dent. 2007 Jun;35(6):496-502. doi: 10.1016/j.jdent.2007.01.009. Epub 2007 Mar 19.
To evaluate the influence of different surface treatments on the microtensile bond strength of a dual-cured resin composite to fiber posts.
Thirty-two glass methacrylate-based fiber posts (GC Corp.) were used in the study. Posts were divided into two groups, according to the surface pretreatment performed. Group 1: sandblasting (Rocatec-Pre, 3M ESPE). Group 2: no pretreatment. In each of the two groups posts received three types of additional "chair-side" treatments. (1) Silane application (Monobond S, Ivoclar Vivadent); (2) adhesive application (Unifil Core self-etching bond, GC); (3) no treatment was performed. A dual-cured resin composite (Unifil Core, GC) was applied on the posts to produce cylindrical specimens. Specimens were cut to obtain microtensile sticks that were loaded in tension at a cross-head speed of 0.5mm/min until failure. The morphology of the post/composite interface and the post surface morphology were evaluated under SEM. Statistical analysis was performed with two-way ANOVA and Tukey test for post hoc comparisons (p<0.05).
Post surface pretreatment did not prove to be a significant factor in post-composite bond strength (p=0.08), whereas "chair-side" treatment modalities and the interaction between pretreatment and treatment showed a significant influence on bond strength (p<0.001). When no "chair-side" treatment was performed, bond strength was significantly higher on sandblasted posts. Additional adhesive application resulted in significantly lower bond strength on sandblasted posts. When no pretreatment was performed, silane application resulted in higher bond strength than adhesive application.
Sandblasting may give an increase in microtensile strength to methacrylate-based glass fiber posts, eliminating the need for additional "chair-side" treatments. Reducing the number of clinical steps could contribute to simplify the clinical procedures.
评估不同表面处理对双固化树脂复合材料与纤维桩微拉伸粘结强度的影响。
本研究使用了32根基于甲基丙烯酸甲酯的玻璃纤维桩（GC公司）。根据进行的表面预处理，将桩分为两组。第1组：喷砂处理（Rocatec-Pre，3M ESPE）。第2组：不进行预处理。在两组中的每组桩上进行三种额外的“椅旁”处理。（1）应用硅烷（Monobond S，义获嘉伟瓦登特）；（2）应用粘结剂（Unifil Core自酸蚀粘结剂，GC）；（3）不进行处理。将双固化树脂复合材料（Unifil Core，GC）应用于桩上以制作圆柱形试件。将试件切割以获得微拉伸棒，以0.5mm/min的十字头速度对其进行拉伸加载直至破坏。在扫描电子显微镜下评估桩/复合材料界面的形态和桩表面形态。采用双向方差分析和Tukey检验进行统计学分析以进行事后比较（p<0.05）。
桩表面预处理在桩-复合材料粘结强度方面未被证明是一个显著因素（p=0.08），而“椅旁”处理方式以及预处理与处理之间的相互作用对粘结强度有显著影响（p<0.001）。当不进行“椅旁”处理时，喷砂处理的桩的粘结强度显著更高。额外应用粘结剂导致喷砂处理的桩的粘结强度显著降低。当不进行预处理时，应用硅烷产生的粘结强度高于应用粘结剂。
喷砂处理可能会提高基于甲基丙烯酸甲酯的玻璃纤维桩的微拉伸强度，从而无需额外的“椅旁”处理。减少临床步骤数量有助于简化临床操作程序。
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