不同根管内壁处理方法对玻璃离子水门汀与根管牙本质粘接强度的影响

目的：评价不同根管内壁处理方法对树脂改性玻璃离子水门扪‘与根管牙本质粘接强度的影响。方法：新鲜拔除的42个完整前牙或单根管前磨牙，于釉一牙骨质界处水平截断，根据不同处理根管壁＋粘接纤维桩的方法随机分为7组：A组：无酸蚀＋GC Fuji I；B组：酸蚀＋GC Fuji I；C组：酸蚀＋singlebond2＋GCFujiI；D组：无酸蚀＋GCFuji ⅡLC；E组：酸蚀＋GC VujiⅡLC；F组：酸蚀＋singlebond2＋GCVujiⅡLC：G组：酸蚀＋singlebond2＋ClearfilDCCoreAutomix。粘结处理后垂直牙根长轴切割成1mm厚薄片，在万能测试机上进行微推出测试。结果：7组粘接强度分别为A组（1．6367±0．2673）MPa；B组（1．9933±0．1906）MPa；C组（2．4800±0．5349）MPa；D组（3．1967±0．7068）MPa：E组（3．9385±0．2782）MPa；F组（5．5317±0．5545）MPa；G组（8．2510±0．7757）MPa。D组、E组、F组均相应高于相同根管内壁处理方法的A组、B组、C组（p〈0．05），但均低于G组如〈O．05）；F组〉E组〉D组（P（0．05），ABC三组间无显著差异（p〉O．05）。结论：不同方法处理根管内壁对粘接材料与根管牙本质间的粘接强度有影响。

Effect of different treatments on root canal wall on bonding strengths of resin-modified glass ionomer cement to root canal dentin

Objective:To evaluate the effect of different treatments on root canal wall on bonding strengths of resin-modified glass ionomer cement to root canal dentin.Method:42 fresh integrity anterior teeth or premolar teeth with a single root canal were extracted and sectioned at enamelo-cemental junction level.After root canal preparation all roots were di-vided into 7 groups at random.Each group was treated with different treatments on root canal wall and the fiber posts were bonded with different materials(A:wit...