Carvalho Ceci Nunes, de Oliveira Bauer José Roberto, Loguercio Alessandro Dourado, Reis Alessandra
Dental School, University of São Paulo-USP-São Paulo-Brazil.
J Esthet Restor Dent. 2007;19(3):144-52; discussion 153. doi: 10.1111/j.1708-8240.2007.00087.x.
Eugenol is a radical scavenger that inhibits the polymerization of resin materials. Little is known about the effect of a eugenol-containing temporary restorative material on the resin-dentin bond strength of adhesive systems that partially dissolves and modifies the smear layer.
The aim of this study was to evaluate the effect of eugenol-containing temporary restoration (zinc oxide eugenol [ZOE]) on the resin-dentin microshear bond strength of etch-and-rinse and self-etch adhesives.
The roots of 18 human molars were removed and the crowns of the teeth were transversally sectioned into two halves. The dentin surfaces were embedded in acrylic resin. Half of the samples were stored while the remaining specimens were restored with eugenol-containing temporary restoration. After 24 hours, the ZOE restoration was mechanically removed and dentin surfaces were ultrasonically cleaned. Dentin surfaces were treated with one of the following adhesives: Single Bond, Clearfil SE, and iBond. Six cylinders of Z250 (0.5 mm high and 0.75 mm in diameter) were applied to each bonded dentin surface using a tygon tube. After storage for 24 hours, the specimens were subjected to micro-shear testing. The data was subjected to a two-way analysis of variance and Tukey's test (alpha=0.05).
Similar bond strength values were obtained for Single Bond (p=0.48) either in the control or in the ZOE-treated group. For both self-etch systems, the bond strength in the ZOE-treated group was statistically lower than the control group (p < 0.01).
Although the prior use of eugenol-containing temporary restoration (IRM) affects the resin-dentin bond strength of the etch-and-rinse Single Bond, a more pronounced reduction on bond strength was observed for the two self-etch systems evaluated (iBond, Clearfil SE Bond). CLINICAL SIGNIFICANCE Eugenol-containing provisional restorations (IRM) should not be used prior to the placement of resin restorations bonded with the two-step etch-and-rinse Single Bond and the self-etch adhesives systems iBond and Clearfil SE Bond.
丁香酚是一种自由基清除剂，可抑制树脂材料的聚合。关于含丁香酚的临时修复材料对部分溶解和改变玷污层的粘结系统的树脂-牙本质粘结强度的影响，目前知之甚少。
本研究的目的是评估含丁香酚的临时修复体（氧化锌丁香酚[ZOE]）对酸蚀冲洗粘结剂和自酸蚀粘结剂的树脂-牙本质微剪切粘结强度的影响。
拔除18颗人磨牙的牙根，将牙冠横向切成两半。牙本质表面嵌入丙烯酸树脂。一半样本保存，其余样本用含丁香酚的临时修复体进行修复。24小时后，机械去除ZOE修复体，超声清洁牙本质表面。牙本质表面用以下粘结剂之一处理：Single Bond、Clearfil SE和iBond。使用泰贡管在每个粘结的牙本质表面施加6个Z250圆柱体（高0.5毫米，直径0.75毫米）。储存24小时后，对样本进行微剪切测试。数据进行双向方差分析和Tukey检验（α=0.05）。
在对照组或ZOE处理组中，Single Bond的粘结强度值相似（p=0.48）。对于两种自酸蚀系统，ZOE处理组的粘结强度在统计学上低于对照组（p<0.01）。
尽管先前使用含丁香酚的临时修复体（IRM）会影响酸蚀冲洗粘结剂Single Bond的树脂-牙本质粘结强度，但对于所评估的两种自酸蚀系统（iBond、Clearfil SE Bond），观察到粘结强度有更明显的降低。临床意义：在使用两步酸蚀冲洗粘结剂Single Bond以及自酸蚀粘结剂系统iBond和Clearfil SE Bond粘结树脂修复体之前，不应使用含丁香酚的临时修复体（IRM）。
