全酸蚀牙本质粘结剂不同固化方式对Ceramage聚合瓷嵌体微渗漏的影响

摘要

AIM:To observe the effects of different curing methods of total etching dentin adhesive on the microleakage of Ceramage polymerization porcelain inlay.METHODS:Class II cavities on mesial-occlusal and distal-occlusal surfaces were prepared on 20 extracted premolars.Ceramage polymerization porcelain inlays were made. The mesial cavities(control group)were etched with total etching dentin adhesive and the adhesive was cured by tradi-tional curing method,then inlays were adhered by resin cement.The distal cavities(experiment group)were etched with total etching dentin adhesive,inlays were adhered by resin cement,then both adhesive and resin were light -cured simultaneously.After fuchsin staining,the teeth were splited twice and the depth of dye penetration was observed under optical microscope.RESULTS:The microleakage of the experiment group was lower than that of the control group,but with no statistic difference (P>0.05).The microleakage of gingival wall was significantly higher than that of shaft wall within the same group (P<0.05 ).CONCLUSION:Total etching dentin adhesive without curing may result in the same microleakage level as the total etching dentin adhesive with curing.Shaft wall microleakage is less than gingival wall.%目的：观察全酸蚀牙本质粘结剂不同固化方式对Ceramage聚合瓷嵌体微渗漏大小的影响。方法：选择20个离体前磨牙在近远中分别制备长方体形邻牙合面洞，Ceramage聚合瓷制作嵌体后，近中为对照组，采用牙本质粘结剂常规光照固化后树脂水门汀粘结嵌体；远中为实验组，采用牙本质粘结剂涂布后不单独固化，在树脂水门汀粘结嵌体后同时光照固化。品红染色后金刚砂片平行于牙体长轴沿近远中方向将修复体纵向剖开2次，体视显微镜下测量染料渗入轴壁、龈壁的深度。结果：实验组微渗漏低于对照组，但差异无统计学意义（轴壁t＝0．304，龈壁t＝0．408，P＞0．05）；同组间龈壁微渗漏程度均显著高于轴壁（实验组t＝2．766，对照组t＝2．392，P＜0．05）。结论：全酸蚀牙本质粘结剂不单独固化组和常规固化组相比具有同样的抗微渗漏能力；轴壁抗微渗漏能力好于龈壁。