两种树脂水门汀对纤维桩冠方微渗漏的影响  

Effect of Two Types of Resin Cements on the Coronal Microleakage of Fiber Post

作　　者：雷慧云[1] 陈蕾[1] 徐国富[2] 梁霄鹏[2] 李继佳[1] 

机构地区：[1]中南大学附属湘雅医院口腔科,湖南长沙410008 [2]中南大学材料科学与工程学院

出　　处：《口腔医学研究》2011年第2期109-112,共4页Journal of Oral Science Research

基　　金：湖南省自然科学基金(编号:09JJ3029;学科代码:C170803)

摘　　要：目的:通过观察两种树脂水门汀引起的纤维桩冠方微渗漏值及在扫描电镜下与牙本质的粘接界面,比较两种树脂水门汀的封闭性能。方法:42颗离体下颌前磨牙分成6组,其中30颗牙分为2组,分别用Panavia F、Paracore 5mL粘接纤维桩,经染色、透明化处理后,在体式显微镜下记录2组微渗漏得分;另有10颗牙分为2组,分别用Panavia F、Paracore 5mL粘接纤维桩后纵形剖开,置于扫描电镜下观察牙本质水门汀界面;其余2颗牙分别作为阳性对照组及阴性对照组。结果:Paracore 5mL引起的纤维桩冠方渗漏值明显较Panavia F小(P<0.01)。两种树脂水门汀与牙本质界面均可形成混合层,而仅Paracore 5mL组可发现树脂突及粘接性侧枝。结论:全酸蚀树脂水门汀对纤维桩冠方微渗漏的影响较自酸蚀树脂水门汀小;全酸蚀树脂水门汀与牙本质结合紧密,封闭性能较自酸蚀树脂水门汀优越。Objective：To compare the sealing properties of two kinds of resin cements by observing the records of coronal microleakage of fiber posts and the bonding interfaces of cements and root canal dentin.Methods：42 extracted mandibular premolars were divided into 6 groups in which 30 teeth were divided into 2 groups and were cemented by Panavia F and Paracore 5ml,respectively.After dyed and transparented,each tooth was observed under stereoscopic microscope and the dyeing scores were also recorded.Another 10 teeth were divided into 2 groups and were cemented by Panavia F and Paracore 5ml,respectively.Each tooth was sectioned into two parts,and the dentin-cement interface of each tooth was observed by scanning electron microscope.The rest 2 teeth were used as the positive control group and the negative control group,respectively.Results：Paracore 5ml caused less coronal microleakage of fiber post than Panavia F（P〈0.01）.Obvious hybrid layer could be seen on the dentin-cement interfaces in Panavia F and Paracore 5ml groups,however,resin tags and lateral adhesives were only observed in Paracore 5ml groups.Conclusion：The total-etch resin cement causes less coronal microleakage of fiber post than self-etch resin cement.The total-etch resin cement bounds tightly with dentin,and owns a more superior sealing property than self-etch resin cement.

关 键 词：树脂水门汀 纤维桩 混合层 微渗漏 扫描电镜 

分 类 号：R783.1[医药卫生—口腔医学]