Studies on the adhesion system between resin-based luting agents and abutments

本研究的目的是观察临时粘结对树脂基牙本质粘结剂与基牙本质之间粘结强度的影响。对3种临时粘固剂和4种粘结剂进行了评价。用三种临时粘固剂HY-Bond临时粘固剂Hard、Freegenol Temporary Pack和Neodyne T中的一种粘接到牛牙本质上。对照组不使用其粘固剂。去除临时粘固剂后，将每个牙本质基材粘结到硅烷处理的IPS Empress(陶瓷材料)上，使用四种粘结剂之一：Super-Bond C&B、Panavia F、Nexus II和Fuji Luting S。修复体的正确就位是其正确安装和固位的基本要求。只要临时粘固剂从基牙表面完全去除，就可以实现这一点。在本研究中，检查了一种常规的临床程序，即使用机械挖掘机将临时粘固剂从牙本质表面移除。扫描电子显微镜检测到了测试的每个水泥品牌的显著残留物。显微照片显示，在使用表面处理剂之前，应使用额外的器械和/或方法来确保临时粘固剂完全去除。超级粘结剂与牙本质之间的粘结强度受到丁香酚临时粘固剂的负面影响。Panavia粘结剂与HY-Bond聚羧酸盐粘固剂临时粘结后，粘结强度也降低。然而，通过使用Freegenol临时粘固剂(非丁香酚临时粘固剂)，四种粘结剂与牙本质的粘结强度没有受到负面影响。这两个因素的结合似乎解释了债券强度下降的原因。对于临床医生来说，选择一种与所选粘接剂相容的临时粘固剂是很重要的。

The purpose of this study is to examine the influence of temporary cementation on the strength of the bond formed between resin-based luting agent and dentin of abutment. Three temporary cement and four luting agents were evaluated. An acrylic resin plate was luted to bovine dentin using one of three temporary cements ; HY-Bond Temporary Cement Hard, Freegenol Temporary Pack, and Neodyne T. The control group was not treated with its cement. Following the removal of the temporary cement, each dentin substrate was bonded to a silane-treated IPS Empress (ceramic material) with one of four luting agents; Super-Bond C＆B, Panavia F, Nexus II, and Fuji Luting S.Correct seating of the restoration is an essential requirement for its proper fitting and retention. This can be achieved provided temporary cement is removed completely from the abutment tooth surface. In the present study a routine clinical procedure was examined in which temporary cement was removed from the dentin surface using a mechanical excavator. Significant remnants of each cement brand tested were detected by scanning electron microscopy. The micrographs suggest that additional instruments and/or methods should be employed to ensure the complete removal of temporary cements, prior to the application of surface conditioning agents.The strength of the bond between the Super-Bond luting agent and dentin was negatively affected by the eugenol temporary cement. The bond strength of the Panavia luting agent was also reduced following temporary cementation with the HY-Bond polycarboxylate cement. However, bond strength to dentin of four luting agents was not negatively affected through the use of the Freegenol Temporary Pack (no-eugenol temporary cement). The combination of these two factors appears to explain the reduction in bond strength. It is important for clinicians to select a temporary cement which is compatible with the chosen adhesive luting agent.