Demiryürek Ebru Ozsezer, Külünk Safak, Saraç Duygu, Yüksel Gözde, Bulucu Bilinç
Department of Restorative Dentistry and Endodontics, Faculty of Dentistry, Ondokuz Mayis University, Samsun, Turkey.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2009 Aug;108(2):e74-80. doi: 10.1016/j.tripleo.2009.03.047.
The purpose of this study was to evaluate the effects of different surface treatments on the bond strength of a fiber post to dentin.
Sixty extracted human maxillary incisor teeth were manually shaped with K-files using the step-back technique. ISO size 45 files were used as master apical files. Post spaces were prepared and then the root canals were subjected to one of the following 5 surface treatments: irrigation with 5% sodium hypochlorite (NaOCl); treatment with ethanol, ethyl acetate, and acetone-based cleansing agent (Sikko Tim); irrigation with 17% EDTA; etching with 37% orthophosphoric acid for 15 seconds; and etching with 10% citric acid for 15 seconds. Fiber posts were luted using self-etching/self-priming dual polymerized resin cement. From the coronal part of each root, 3 slides of 0.6-mm thickness were obtained. A push-out bond strength test was performed by a universal testing machine at a crosshead speed of 0.5 mm/min. Dentin surfaces were examined under scanning electron microscopy (SEM) after different surface treatments. Data were analyzed with a one-way analysis of variance (ANOVA) and Tukey HSD test.
ANOVA revealed that canal surface treatment affected the bond strength (P < .001). The highest bond strength was obtained in the Sikko Tim group. The results also showed that surface treatment methods increased the bond strength to dentin when compared with the control group.
Sikko Tim group was the more effective surface treatment agent compared with EDTA, orthophosphoric acid, citric acid, and control groups; however, it could not remove the smear layer and sealer remnants effectively on radicular dentin surfaces. Removal of the smear layer and opening of dentinal tubules are not recommended when a self-etching/self-priming adhesive system is used.
本研究旨在评估不同表面处理对纤维桩与牙本质粘结强度的影响。
采用逐步后退技术，用K锉对60颗拔除的人上颌中切牙进行手工预备。使用ISO 45号锉作为主尖锉。制备桩道后，对根管进行以下5种表面处理之一：用5%次氯酸钠（NaOCl）冲洗；用乙醇、乙酸乙酯和丙酮基清洁剂（Sikko Tim）处理；用17%乙二胺四乙酸（EDTA）冲洗；用37%正磷酸酸蚀15秒；用10%柠檬酸酸蚀15秒。使用自酸蚀/自引发双重聚合树脂水门汀粘结纤维桩。从每个牙根的冠部获取3片厚度为0.6毫米的切片。用万能试验机以0.5毫米/分钟的十字头速度进行推出粘结强度试验。在不同表面处理后，用扫描电子显微镜（SEM）检查牙本质表面。数据采用单因素方差分析（ANOVA）和Tukey HSD检验进行分析。
方差分析显示根管表面处理影响粘结强度（P <.001）。Sikko Tim组获得的粘结强度最高。结果还表明，与对照组相比，表面处理方法提高了与牙本质的粘结强度。
与EDTA、正磷酸、柠檬酸和对照组相比，Sikko Tim组是更有效的表面处理剂；然而，它不能有效去除根管牙本质表面的玷污层和封闭剂残余物。当使用自酸蚀/自引发粘结系统时，不建议去除玷污层和开放牙本质小管。
