【摘要】 目的了解不同树脂粘接剂对纤维桩树脂核冠向微渗漏的影响。方法选用60颗人离体上颌单根管前牙,根管治疗后随机分成4组,行桩腔预备,选用4种树脂粘接系统,分别为RelyX Unicem、Dulink、DC core Automix、Luxacore,进行树脂核重建。样本浸泡于印度墨水中1周后,脱矿、脱水并透明化处理,体视显微镜下观察染料的渗透情况。结果 4组树脂粘接剂间微渗漏程度的差异有统计学意义(P=0.007),C组微渗漏程度最轻。结论自酸蚀树脂粘接材料有着良好的边缘封闭作用。更多还原

【Abstract】 Objective To evaluate the coronal microleakage of teeth restored with fiber posts and composite cores with four different resin bonding systems.Methods Sixty extracted human maxillary single-rooted teeth were endodon-tically treated and randomly divided into four groups.Post spaces were prepared in the root canals.Four different resin bonding systems(RelyX Unicem,Dulink,DC core Automix,Luxacore) were used respectively to bond fiber posts and reconstruct cores.The specimens were immersed in India ink for one week.Subsequently all teeth were demineralized,dehydrated and rendered transparent.Then microleakage was observed with stereomicroscope.Results The microleakage degrees among four resin bonding systems were significantly different(P=0.007),and group C showed the least microleakage compared with the other three.Conclusion Self-etching resin bonding systems have a super margin sealing ability.更多还原