Spohr A M, Conceição E N, Pacheco J F
Pontifical Catholic University of Rio Grande do Sul, Brazil.
Am J Dent. 2001 Aug;14(4):247-51.
To assess, in vitro, the tensile bond strength to dentin of the following adhesive systems: Single Bond (3M), One Coat Bond (Coltène), Clearfil Liner Bond 2 V (Kuraray) and Etch & Prime 3.0 (Degussa).
Thirty third molars, extracted according to therapeutic indication, were used. The roots were removed at the cement-enamel junction level and the crowns were sectioned in a mesial-distal direction, obtaining buccal and lingual halves. The dental portions were included in self-cured acrylic resin, abraded on a lathe under water spray and polished to 400 and 600 grit. The adhesive systems were applied on dentin according to manufacturers' instructions and resin-based composite (Z100) cones were bonded. For each adhesive system, 15 specimens were prepared, stored in distilled water at 37 degrees C during 24 hrs and submitted to tensile bond strength tests on a universal testing machine (EMIC DL-2000) at a crosshead speed of 0.5 mm/min.
The mean tensile bond strength to dentin (MPa +/- SD) were statistically different (ANOVA, Tukey's tests, P < or = 0.01, shown by asterisks) from each other: (1) Clearfil Liner Bond 2 V* = 24.8 +/- 3.3; (2) One Coat Bond** = 20.4 +/- 2.0; (3) Single Bond** = 18.1 +/- 2.4; (4) Etch & Prime 3.0*** = 5.8 +/- 2.4.
在体外评估以下几种粘结系统与牙本质的拉伸粘结强度：单组分粘结剂（3M公司）、一涂粘结剂（康特恩公司）、Clearfil Liner Bond 2 V（可乐丽公司）和蚀刻与底涂剂3.0（德固赛公司）。
使用根据治疗指征拔除的30颗第三磨牙。在牙骨质-釉质界水平去除牙根，将牙冠沿近远中方向切开，得到颊侧和舌侧两半。将牙齿部分包埋于自凝丙烯酸树脂中，在喷水条件下于车床上研磨并抛光至400目和600目。按照制造商的说明将粘结系统应用于牙本质上，并粘结树脂基复合材料（Z100）圆锥体。对于每种粘结系统，制备15个样本，在37℃的蒸馏水中储存24小时，然后在万能试验机（EMIC DL - 2000）上以0.5mm/min的十字头速度进行拉伸粘结强度测试。
各粘结系统与牙本质的平均拉伸粘结强度（MPa±标准差）之间存在统计学差异（方差分析，Tukey检验，P≤0.01，用星号表示）：（1）Clearfil Liner Bond 2 V* = 24.8±3.3；（2）一涂粘结剂** = 20.4±2.0；（3）单组分粘结剂** = 18.1±2.4；（4）蚀刻与底涂剂3.0*** = 5.8±2.4。
