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

摘要本研究旨在探讨暂时性黏接对树脂基封固剂与基牙本质间黏结强度之影响。对三种临时骨水泥和四种粘结剂进行了评价。使用三种临时粘固剂之一：HY-Bond临时硬粘固剂、Freegenol临时包和Neodyne T将丙烯酸树脂板固定到牛牙本质上。对照组不使用其骨水泥。去除临时骨水泥后，使用四种粘合剂之一将每个牙本质基质粘合到经过硅烷处理的IPS Empress（陶瓷材料）上; 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保持的基本要求。这可以通过将临时粘固剂从基牙表面完全清除来实现。在本研究中，检查了一种常规临床程序，其中使用机械挖掘机从牙本质表面去除临时粘固剂。通过扫描电子显微镜检测每个测试水泥品牌的显著残留物。显微照片表明，额外的仪器和/或方法，应采用，以确保完全删除临时水泥，表面调理剂的应用程序之前，Super-Bond粘接剂和牙本质之间的粘结强度的丁子香酚临时水泥产生负面影响。在使用HY-Bond聚羧酸盐骨水泥进行临时骨水泥固定后，Panavia粘接剂的粘接强度也降低。然而，通过使用Freegenol临时包（无丁香酚临时粘固剂），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可以解释粘结强度的降低。对于临床医生来说，选择一种与所选粘合剂相容的临时骨水泥非常重要。

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.