摘要
目的:研究玻璃离子水门汀、复合树脂、夹层技术3种不同充填方法修复楔形缺损后,牙颈部硬组织的应力分布。方法:建立下颌第一前磨牙颊舌向剖面模示图,选择以上3种方法模拟充填缺损区,采用二维有限元应力分析法,对牙颈部进行应力分析。结果:玻璃离子水门汀、复合树脂、夹层技术修复楔形缺损后,牙颈部硬组织深部最大主应力分别为51.2、38.5、34.8 MPa。结论:以上3种修复楔形缺损方法中,夹层技术效果较好。
AIM： To investigate the stresses at the tooth cervix with simulating restoration of three different techniques. METHODS ： A two dimensional finite element model of a longitudinal section of a mandibular premolar with defect was established. The model was simulatedly restored by composite resin, glass ionomer cement or sandwich tech- niques respectively, and the stress variation in the cervical region was studied . RESULTS： In the restored models, the maximum stresses of glass ionomer cement, comsite resin and sandwich technique restorations were 51.2MPa, 38.5MPa and 34.8MPa. CONCLUSION： The restored effect of the sandwich technigue is the best among the three techniques.
出处
《牙体牙髓牙周病学杂志》
CAS
北大核心
2009年第7期397-399,共3页
Chinese Journal of Conservative Dentistry
关键词
修复
应力
楔形缺损
restoration
stress
wedge - shaped defect
