Pangsrisomboon Benyarat, Harnirattisai Choltacha, Nilsri Kanitha, Burrow Michael F
Department of Operative Dentistry, Faculty of Dentistry, Mahidol University, Bangkok, Thailand.
Am J Dent. 2007 Aug;20(4):259-62.
To evaluate the microtensile bond strength (microTBS) of three self-etching adhesive systems with different degrees of acidity (Clearfil SE Bond, One-Up Bond F, and Xeno III) to dentin prepared with three different methods.
Forty-five extracted human third molars were ground flat to expose occlusal dentin and polished with 600-grit abrasive paper. All teeth were randomly divided into three groups according to the preparation method: baseline surface (AP#600), steel fissure bur (SB) and regular grit diamond bur (DB). Dentin surfaces were bonded with one of the three adhesive systems; then resin composite was incrementally built up. After storage in 37 degrees C water for 24 hours, specimens were cut and trimmed to create an hourglass shape with cross sectional area of approximate 1 mm2. All specimens were subjected to microtensile bond strength testing. The bond strength data were analyzed with one and two-way ANOVA and Dunnett Multiple comparisons test at P< 0.05.
For Xeno III and One-Up Bond F, the microTBS to dentin prepared with the different methods were not significantly different. However, the microTBS of Clearfil SE Bond to dentin prepared with the diamond bur was significantly lower than the other preparation methods. Xeno III produced the lowest microTBS that were statistically different from the other adhesive systems when each preparation method was compared (P< 0.01). SEM observation of the prepared dentin surfaces showed that the diamond bur group produced a thicker smear layer that followed by steel bur and 600-grit paper. Therefore, the smear layer from diamond burs had a greater influence in decreasing microTBS of Clearfil SE Bond that has the weakest acidity self-etching adhesive systems evaluated.
评估三种不同酸度的自酸蚀粘结系统（Clearfil SE Bond、One-Up Bond F和Xeno III）与用三种不同方法制备的牙本质之间的微拉伸粘结强度（microTBS）。
将45颗拔除的人类第三磨牙磨平以暴露咬合面牙本质，并用600目砂纸抛光。根据制备方法将所有牙齿随机分为三组：基线表面（AP#600）、钢裂钻（SB）和常规粒度金刚石钻（DB）。牙本质表面用三种粘结系统之一进行粘结；然后逐层堆积树脂复合材料。在37℃水中储存24小时后，将标本切割并修整成沙漏形状，横截面积约为1mm²。所有标本均进行微拉伸粘结强度测试。粘结强度数据采用单因素和双因素方差分析以及Dunnett多重比较检验进行分析，P<0.05。
对于Xeno III和One-Up Bond F，用不同方法制备的牙本质的microTBS没有显著差异。然而，Clearfil SE Bond与用金刚石钻制备的牙本质的microTBS显著低于其他制备方法。当比较每种制备方法时，Xeno III产生的最低microTBS与其他粘结系统在统计学上有差异（P<0.01）。对制备的牙本质表面进行扫描电子显微镜观察表明，金刚石钻组产生的玷污层更厚，其次是钢钻和600目砂纸组。因此，金刚石钻产生的玷污层对降低Clearfil SE Bond的microTBS影响更大，Clearfil SE Bond是所评估的酸度最弱的自酸蚀粘结系统。
