Savadi Oskoee Siavash, Bahari Mahmoud, Kimyai Soodabeh, Motahhari Paria, Eghbal Mohammad Jafar, Asgary Saeed
Professor, Department of operative Dentistry, School of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
Assistant Professor, Dental and Periodontal Research Center, School of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran ; Assistant Professor, Department of Operative Dentistry, School of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
J Dent (Tehran). 2014 Nov;11(6):665-71. Epub 2014 Nov 30.
Immediate restoration after vital pulp therapy is essential in order to create and maintain effective coronal seal.
The aim of this study was to evaluate the shear bond strength of recently used pulp capping materials: white mineral trioxide aggregate (MTA), and calcium enriched mixture cement (CEM) to composite resin with the use of etch-and-rinse and self-etch adhesive systems and compare them with the bond strength of commonly used resin modified glass ionomer (RMGI) cement.
Forty specimens from each test material were fabricated, measuring 4 mm in diameter and 2 mm in depth. The specimens of each material were divided into 2 groups of 20 specimens according to the adhesive system (Single Bond vs. Clearfil SE Bond) used for bonding of resin composite. The shear bond strength values were measured at a crosshead speed of 1.0 mm/min and fractured surfaces were examined. Data were analyzed using two-way ANOVA and a post hoc Tukey's test (P<0.05).
Analysis of data showed a significantly higher bond strength for RMGI compared to MTA and CEM (P<0.001); however, no significant differences were observed in the bond strength values of MTA and CEM (P=0.9). Furthermore, there were no significant differences in relation to the type of the adhesive system irrespective of the type of the material used (P=0.95) All the failures were of cohesive type in RMGI, MTA and CEM.
Bond strength of RMGI cement to composite resin was higher than that of MTA or CEM cement irrespective of the type of the adhesive system.
活髓治疗后的即刻修复对于形成并维持有效的冠部封闭至关重要。
本研究旨在评估近期使用的牙髓盖髓材料：白色三氧化矿物盐聚合物（MTA）和富钙混合水泥（CEM）与复合树脂在使用酸蚀冲洗和自酸蚀粘结系统时的剪切粘结强度，并将它们与常用的树脂改性玻璃离子水门汀（RMGI）的粘结强度进行比较。
制备每种测试材料的40个样本，直径4毫米，深度2毫米。根据用于粘结树脂复合材料的粘结系统（单键粘结剂与Clearfil SE Bond），将每种材料的样本分为两组，每组20个样本。以1.0毫米/分钟的十字头速度测量剪切粘结强度值，并检查断裂表面。使用双向方差分析和事后Tukey检验（P<0.05）对数据进行分析。
数据分析显示，与MTA和CEM相比，RMGI的粘结强度显著更高（P<0.001）；然而，MTA和CEM的粘结强度值未观察到显著差异（P=0.9）。此外，无论使用何种材料类型，粘结系统类型之间均无显著差异（P=0.95）。RMGI、MTA和CEM的所有失效均为内聚破坏类型。
无论粘结系统类型如何，RMGI水门汀与复合树脂的粘结强度均高于MTA或CEM水门汀。
