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

本研究的目的是研究临时固井对树脂基固牙剂与基牙本质粘结强度的影响。对3种临时水泥和4种粘结剂进行了评价。使用三种临时粘合剂中的一种将丙烯酸树脂板固定在牛牙本质上；HY-Bond Temporary Cement Hard， Freegenol Temporary Pack和Neodyne T.，对照组不使用其水泥。移除临时水泥后，每个牙本质基板用四种粘结剂中的一种与硅烷处理的IPS皇后（陶瓷材料）结合；Super-Bond C&B, Panavia F， Nexus II和Fuji Luting s .正确的修复座位是其正确安装和保持的基本要求。这是可以实现的临时水泥完全从基牙表面去除。在本研究中，例行的临床程序是使用机械挖掘机从牙本质表面移除临时水泥。通过扫描电子显微镜检测到每个水泥品牌的显著残留物。显微照片表明，在应用表面调理剂之前，应该采用额外的仪器和/或方法来确保完全去除临时水泥。丁香酚临时粘接对超级粘接剂与牙本质的结合强度有负面影响。与HY-Bond聚羧酸盐水泥临时胶结后，Panavia胶凝剂的粘结强度也降低了。然而，通过使用Freegenol临时包（无丁香酚临时水泥），四种粘结剂与牙本质的结合强度没有受到负面影响。这两个因素的结合似乎解释了粘结强度的降低。对于临床医生来说，选择一种与所选择的粘接剂兼容的临时水泥是很重要的。

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.