两种桩核粘接剂对离体上中切牙折裂强度影响的研究  

An in vitro study of two different cements' influence to the fracture resistance of upper central incisors restored with post-and-core systems

作　　者：李建[1] 王瑞霞[1] 冯英先[2] 

机构地区：[1]南京医科大学附属口腔医院,江苏南京210029 [2]南京理工大学力学实验中心

出　　处：《临床口腔医学杂志》2005年第11期667-669,共3页Journal of Clinical Stomatology

基　　金：江苏省教育厅自然科学基金资助项目(02KJD320007)

摘　　要：目的:观测磷酸锌水门汀及树脂粘接剂(Super-Bond C&B)作为离体上中切牙核桩修复粘接剂在静态载荷下牙体抗力的大小。方法:将16个常规核桩修复的离体上中切牙随机分成2组,每组8个,分别采用磷酸锌水门汀、Super-Bond C&B粘固,用电子万能实验机对离体牙进行抗力测试,观测其折裂强度及折裂部位,并进行统计学分析。结果:采用磷酸锌粘固组的牙体折裂强度为591±106 N,Super-Bond C&B粘固组的牙体折裂强度为914±145 N,两组差异具有显著性(P<0.01)。主要的折裂方式为根颈1/3斜折。结论:树脂类粘接剂Super-BondC&B较磷酸锌水门汀能显著提高桩核冠修复后牙体的折裂强度。Objective：An in vitro study was conducted to measure the fracture resistance of upper incisors restored with post-and-core systems . The posts were cemented by two different cements： Super-bond C＆B and zinc phosphate cement. Method： 16 upper central incisors were divided into two equal groups at random. Super-bond C＆B was used for one group and zinc phosphate cement for the other . These teeth were prepared for cast post-and-core and complete crown restoration after routine root canal therapy and then tested by a universal testing machine until those fractures occurred by applying loads at an angle of 45 degrees. Data were analyzed statistically and modes of failure were also compared. Result： The fracture resistance of the roots in which the posts were cemented with Super-bond C＆B was 914 ± 145 N and the one of those where zinc phosphate cement was used was 591 ± 106 N. Two groups showed statistical significance （P 〈 0.01 ）. Most of the teeth demonstrated cervical root fracture. Conclusion：Super-bond C＆B results in significantly higher fracture resistance than zinc phosphate, which suggests that the choice of cement is important to the maximum fracture resistance in endodontically treated teeth.

关 键 词：桩核修复 粘接剂 抗力 折裂强度 

分 类 号：R783.1[医药卫生—口腔医学]