不同粘固剂粘固的IPS-Empress2后牙全瓷冠边缘微渗漏比较研究

A comparative study of marginal microleakage using three different cements in ceramic crowns

目的 :评价 3种不同粘固剂粘固的 IPS- Empress2后牙全瓷冠的边缘微渗漏。方法 :制作 2 4个 IPS-Empress2全瓷冠 ,分 3组用 3种不同粘固剂粘固于上颌第三磨牙 ,经温度循环试验后 ,将样本浸入 2 %品红溶液2 4 h,用体视显微镜观测牙 -粘固剂界面、全瓷冠 -粘固剂界面边缘微渗漏状况。结果 :Panavia F树脂粘结系统组微渗漏最小 (0 .90± 0 .75 ,0 .4 6± 0 .37) ,Dyract compomer树脂粘结剂组次之 (4.71± 1.6 8,5 .2 8± 1.4 8) ,而 Harvard磷酸锌粘固剂组最大 (6 .99± 0 .0 4 ,6 .99± 0 .0 4 ) ,经 F检验 P<0 .0 1。结论 :Panavia F树脂粘结系统抗边缘微渗漏性能优越 ,适于粘固 IPS- Empress2后牙全瓷冠。

Objective: To evaluate the marginal microleakage of IPS Empress 2 all ceramic crowns using three different cements. Methods: Twenty four IPS Empress 2 all ceramic crowns were built and luted onto standardly prepared human upper third molars using three different cements. All samples were thermocycled then submerged in 2% fuchsin for 24 hours. The marginal microleakage at tooth cement and ceramic crown cement interfaces was observed using light stereomicroscopy. Results: The Panavia F adhesive luting system demonstrated the least microleakage (0.90±0.75,0.46±0.37). Dyract compomer cement showed an intermediate level of microleakage( 4.71 ±1.68,5.28±1.48).Harvard zinc phosphate cement was associated with severe microleakage in all specimens (6.99±0.04,6.99±0.04). The differences in microleakage among the three cements was highly significant ( P <0.01). Conclusion: Panavia F adhesive luting system was the most effective dental cement to prevent microleakage . It can be used for IPS Empress 2 posterior all ceramic crowns.