常用3种光固化复合树脂材料修复楔状缺损离体牙的组织学评价  

Histological evaluation of three commonly used light-cured resin composite materials in the wedge-shaped defect repair of extracted teeth

作　　者：王雪梅[1] 吴巍伟 高美珍[2] 赵忠[2] 余占海[1] 

机构地区：[1]兰州大学口腔医学院 [2]兰州大学物理科学与技术学院,甘肃省兰州市730000

出　　处：《中国组织工程研究》2012年第16期2947-2950,共4页Chinese Journal of Tissue Engineering Research

摘　　要：背景:延长口腔生物材料的使用寿命,是当今口腔治疗学与材料学的关注点。目的:评价3种光固化复合树脂修复牙体楔状缺损的效果。方法:在体外模型中对离体牙进行统一造模,扫描电子显微镜观察3MZ350树脂、3M流体树脂及P90树脂3种修复材料充填后材料与牙体的结合界面。结果与结论:3种材料都显示了与牙体组织基本良好的结合性能,3MZ350树脂微裂隙多出现在粘接剂层,可有空泡出现;P90组树脂材料侧有断裂纹;流体树脂微裂隙很小,这与其流动性有关系。说明3种材料都可以直接充填,良好的边缘封闭性能的粘接剂可有效减少复合树脂-牙齿界面的微渗漏,增加树脂修复的成功率。BACKGROUND： Extending the service life of dental biomaterials is the concern of today’s dental therapeutics and materials science. OBJECTIVE： To evaluate the repairing effects of three kinds of light-cured resin composite materials on wedge-shaped defects. METHODS： A unified modeling was performed on the in vitro models of isolated teeth. Scanning electron microscope was used to observe the bonding interface of the materials and dental body after filling by the three repairing materials （3MZ350 resin, 3M fluid resin and P90 resin）. RESULTS AND CONCLUSION： All three materials showed a reasonably good tooth-bonding property. In the 3MZ350 group, microfissures were usually found in the adhesive layer, and cavity might be found as well; in the P90 group, failure cracks were found on the resin side. The failure cracks of the fluid resin were small; this might be related to the fluidity. These findings indicate that all the three materials can be directly used for filling; adhesive with good edge sealing performance can effectively reduce the micro leakage of the composite resin-teeth interface and increase the restoration success.

关 键 词：复合树脂 楔状缺损 光固化 结合界面 扫描电子显微镜 

分 类 号：R318[医药卫生—生物医学工程]