Albuquerque Maurício, Pegoraro Mariana, Mattei Gracielle, Reis Alessandra, Loguercio Alessandro Dourado
School of Dentistry, University of Oeste de Santa Catarina, Joaçaba, SC, Brazil.
Oper Dent. 2008 Sep-Oct;33(5):564-70. doi: 10.2341/07-145.
To evaluate the use of two alternative modes of application (double-application and placement of a hydrophobic resin coat) compared with the manufacturers' directions on the microtensile bond strength (microTBS) of one-step, self-etch systems to enamel and dentin.
Resin composite buildups were bonded to the buccal and lingual ground enamel surfaces and occlusal dentin of third molars using the following adhesives: Xeno III (XE), GBond (GB), Adper Prompt L-Pop (AD) and Clearfil SE Bond (CSE) as the control. The adhesive systems were applied: (1) following the manufacturer's directions (MD), (2) with double-application (DA) or with (3) additional placement of a hydrophobic resin layer (HR) after following the manufacturer's directions. After storage in water (24 hours/37 degrees C), the bonded specimens were sectioned into sticks (0.8 mm2) that were tested until failure at a crosshead speed of 0.5 mm/minute. Data from each substrate were subjected to two-way ANOVA and Tukey's test (alpha = 0.05).
The interaction Adhesive vs. Application mode was statistically significant (p < 0.05) for both substrates. In dentin, XE and GB achieved high microTBS in the HR group (p < 0.05). For AD, the highest microTBS were observed in the DA group (p < 0.05). For enamel, similar microTBS was observed for XE and GB among the three modes of application, while the highest pTBS of AD was observed in the HR group.
The effects of using the double-application and placement of a hydrophobic resin coat on microtensile dentin-bond strength values seem to be effective; however, these techniques in enamel were adhesive-dependent.
评估两种替代应用模式（双重应用和放置疏水树脂涂层）与制造商说明相比，对一步法自酸蚀系统与釉质和牙本质的微拉伸粘结强度（microTBS）的影响。
使用以下粘合剂将树脂复合材料堆积物粘结到第三磨牙的颊侧和舌侧磨除釉质表面以及咬合面牙本质上：Xeno III（XE）、GBond（GB）、Adper Prompt L-Pop（AD）和Clearfil SE Bond（CSE）作为对照。粘合剂系统的应用方式如下：（1）按照制造商说明（MD）；（2）双重应用（DA）；（3）在按照制造商说明操作后额外放置疏水树脂层（HR）。在水中（24小时/37℃）储存后，将粘结标本切成小条（0.8平方毫米），以0.5毫米/分钟的十字头速度进行测试直至破坏。对每个底物的数据进行双向方差分析和Tukey检验（α = 0.05）。
对于两种底物，粘合剂与应用模式之间的相互作用具有统计学意义（p < 0.05）。在牙本质中，XE和GB在HR组中获得了较高的microTBS（p < 0.05）。对于AD，在DA组中观察到最高的microTBS（p < 0.05）。对于釉质，在三种应用模式中，XE和GB的microTBS相似，而AD在HR组中观察到最高的pTBS。
双重应用和放置疏水树脂涂层对微拉伸牙本质粘结强度值的影响似乎是有效的；然而，这些技术在釉质中的效果取决于粘合剂。
