Adhesive permeability affects coupling of resin cements that utilise self-etching primers to dentine
Adhesive permeability affects coupling of resin cements that utilise self-etching primers to dentine
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DOI：
10.1016/j.jdent.2003.08.003
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发表时间：
2004-01-01
影响因子：
4.4
通讯作者：
Pashley, DH
中科院分区：
文献类型：
--
作者：
Carvalho, RM;Pegoraro, TA;Pashley, DH
目标.研究一种实验性粘接技术对树脂粘固剂与牙本质结合的影响，该技术可降低粘接剂层的渗透性。对离体人第三磨牙进行牙冠横切，使牙本质中深层表面平整暴露。使用Panavia F（Kuraray）或Bistite 11 DC（Tokuyama）树脂粘固剂（由其各自的一步或两步自蚀刻粘合剂介导）构建树脂复合覆盖层并将其粘固到表面。以相同的方式制备实验组，不同之处在于在用相应的树脂粘固剂粘接覆盖物之前，将低粘度粘结树脂（LVBR，Scotchbond Multi-Purpose Plus，3 M ESPE）的附加层放置在粘结的牙本质表面上。将粘合的组件在37 ℃的水中储存24小时，随后准备进行微拉伸粘合强度测试。在万能试验机中以0.5 mm/min的速度对约0.8 mm（2）的梁进行拉伸试验。在扫描电子显微镜（SEM）下检查断裂表面。制备额外的标本并使用硝酸银染色技术进行TEM检查。双因素方差分析显示材料和粘合方案之间的显著相互作用（p < 0.05）。当根据制造商的说明进行粘合时，Panavia F产生的粘合强度显著低于Bistite 11 DC（p < 0.05）。放置LVBR的附加层显著改善了Panavia F的粘合强度（p < 0.05），但Bistite 11 DC的粘合强度没有改善（p > 0.05）。Panavia F断裂表面的SEM观察显示玫瑰花状特征，这是根据制造商说明粘合的样本所独有的。这些特征与界面的超微结构很好地对应，该界面显示出与更具渗透性的粘合剂界面相关的更多纳米渗漏。LVBR的附加层的应用减少了两种粘合剂的银浸渍量，表明粘合剂的渗透性降低导致树脂粘固剂与牙本质的耦合改善。在粘结的牙本质表面和树脂粘固剂之间放置LVBR的中间层导致Panavia F与牙本质的偶联改善。(C)2003 Elsevier Ltd.保留所有权利。
Objectives. To examine the effects of an experimental bonding technique that reduces the permeability of the adhesive layer on the coupling of resin cements to dentine.Methods. Extracted human third molars had their mid to deep dentin surface exposed flat by transversally sectioning the crowns. Resin composite overlays were constructed and cemented to the surfaces using either Panavia F (Kuraray) or Bistite 11 DC (Tokuyama) resin cements mediated by their respective one-step or two-step self-etch adhesives. Experimental groups were prepared in the same way, except that the additional layer of a tow-viscosity bonding resin (LVBR, Scotchbond Multi-Purpose Plus, 3M ESPE) was placed on the bonded dentine surface before luting the overlays with the respective resin cements. The bonded assemblies were stored for 24 h in water at 37degreesC and subsequently prepared for microtensile bond strength testing. Beams of approximately 0.8 mm(2) were tested in tension at 0.5 mm/min in a universal tester. Fractured surfaces were examined under scanning electron microscopy (SEM). Additional specimens were prepared and examined with TEM using a silver nitrate-staining technique.Results. Two-way ANOVA showed significant interactions between materials and bonding protocols (p < 0.05). When bonded according to manufacturer's directions, Panavia F produced bond strengths that were significantly tower than Bistite 11 DC (p < 0.05). The placement of an additional layer of a LVBR improved significantly the bond strengths of Panavia F (p < 0.05), but not of Bistite 11 DC (p > 0.05). SEM observation of the fractured surfaces in Panavia F showed rosette-like features that were exclusive for specimens bonded according to manufacturer's directions. Such features corresponded well with the ultrastructure of the interfaces that showed more nanoleakage associated with the more permeable adhesive interface. The application of the additional layer of the LVBR reduced the amount of silver impregnation for both adhesives suggesting that reduced permeability of the adhesives resulted in improved coupling of the resin cements to dentin.Conclusions. Placement of an intermediate layer of a LVBR between the bonded dentine surface and the resin cements resulted in improved coupling of Panavia F to dentine. (C) 2003 Elsevier Ltd. All rights reserved.