摘要
目的:对直接树脂和间接树脂嵌体修复后牙体的抗力进行三维有限元研究。方法:通过2种加载方式(中央窝垂直加载和2功能面上与牙长轴呈45°加载),研究4种材料(Tescera间接树脂、Renew通用树脂、陶瓷和Co-Cr合金)嵌体修复后牙体应力分布的变化。对照组:备洞未充填的缺损牙体和完整牙体。结果:4种材料嵌体均可以提高缺损牙的抗力,改善缺损牙体内部的应力分布。2种树脂嵌体修复后的牙体应力分布与完整牙体相似;陶瓷、Co-Cr合金则改变了牙本质原有的应力分布。结论:复合树脂嵌体修复能提高缺损牙体的抗力;复合树脂不同固化处理对牙体抗力无明显影响。
Objective： To evaluate fracture resistance of teeth restored with inlay restorations of direct and indirect composite resin. Methods：Three dimensional finite element analysis （3D FEA） was used in present research. Two types of load were applied to investigate the change of tooth fracture resistance after restored with MOD inlay. Group 1,2,3,and 4 were restored with four kinds of materials： group 1, indirect composite resin inlay （ Tescera, Bisco USA） ;group 2, direct composite inlay （ Renew Bisco USA ） ; group 3, ceramic; and group 4, Co-Cr alloy. Defect tooth or intact one was served as the control group. Results：Tooth fracture resistance in group 1,2,3 and 4 were improved, Fracture resistance in group 1 and 2 were similar lo intact tooth group, while the fracture resistance in group 3 and 4 was different effect when compared to intact tooth. Conclusion： Both direct and indirect composite resin inlay could strengthen fracture resistance of restored teeth. No obvious difference between direct and indirect composite resin on tooth resistance was found.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2007年第2期264-267,共4页
Journal of Practical Stomatology
关键词
直接树脂
间接树脂
嵌体
有限元
抗力
Direct/indirect composite resin
Inlay
Finite element （FEM）
Tooth fracture resistance
