Hamdane Nadine, Kmeid Roland, Khoury Elie, Ghoubril Joseph
Dubai, United Arab Emirates.
Department of Orthodontics, School of Dental Medicine, Saint Joseph University, Beirut, Lebanon.
Int Orthod. 2017 Dec;15(4):600-609. doi: 10.1016/j.ortho.2017.09.005. Epub 2017 Oct 28.
The purpose of this study was to compare, in vitro, the shear bond strength of resin-modified glass ionomer (RMGI) bonded to an enamel surface prepared by either sandblasting with 50μm of aluminium oxide particles, deproteinization with 5.25% NaOCl, or by combining both techniques.
One hundred and fifty human premolars were cleaned and randomly divided into five groups. In group 1, the teeth were etched using 37% phosphoric acid and bonded with Transbond XT. In group 2, the teeth were etched using 37% phosphoric acid and bonded with Fuji Ortho LC. In group 3, the teeth were deproteinized with 5.25% NaOCl for one minute then etched with 37% phosphoric acid and bonded with Fuji Ortho LC. In group 4, the enamel was sandblasted with 50μm of aluminium oxide particles for 5seconds prior to etching and bonding with Fuji Ortho LC. In group 5, the teeth were both sandblasted with 50μm of aluminium oxide particles for 5seconds and deproteinized with 5.25% NaOCl for one minute prior to etching using 37% phosphoric acid and bonding with Fuji Ortho LC. The shear bond strength was tested using a universal testing machine with a crosshead speed of 1.0mm/min. The adhesive remnant index (ARI) index was also determined for each group.
The mean shear bond strengths were as follows: group 1: 11.33±2.60MPa, group 2: 8.14±2.09, group 3: 9.57±3.25MPa, group 4: 9.49±1.99MPa and group 5: 9.76±2.29MPa (P=0.0001).
The results show that pre-treating the enamel with either sandblasting, NaOCl, or both, could give a significantly higher shear bond strength than using RMGI with acid etch alone.
本研究的目的是在体外比较树脂改性玻璃离子水门汀（RMGI）与经以下处理的釉质表面的剪切粘结强度：用50μm氧化铝颗粒喷砂处理、用5.25%次氯酸钠进行脱蛋白处理或两种技术联合使用。
150颗人前磨牙经清洁后随机分为五组。第1组，牙齿用37%磷酸酸蚀后用Transbond XT粘结。第2组，牙齿用37%磷酸酸蚀后用Fuji Ortho LC粘结。第3组，牙齿先用5.25%次氯酸钠脱蛋白1分钟，然后用37%磷酸酸蚀，再用Fuji Ortho LC粘结。第4组，釉质在酸蚀和粘结前先用50μm氧化铝颗粒喷砂5秒，然后用Fuji Ortho LC粘结。第5组，牙齿在使用37%磷酸酸蚀和粘结前先用50μm氧化铝颗粒喷砂5秒，再用5.25%次氯酸钠脱蛋白1分钟。使用万能试验机以1.0mm/min的十字头速度测试剪切粘结强度。还测定了每组的粘结剂残留指数（ARI）。
平均剪切粘结强度如下：第1组：11.33±2.60MPa，第2组：8.14±2.09，第3组：9.57±3.25MPa，第4组：9.49±1.99MPa，第5组：9.76±2.29MPa（P = <0.0001）。
结果表明釉质经喷砂、次氯酸钠或两者联合预处理后的剪切粘结强度显著高于单独使用酸蚀的RMGI。
