Brnemark种植固定义齿游离臂长度对应力分布影响的三维有限元分析  

Three-Dimesional Finite Element Method Analysis of Stress Distribution around Branemark Implants fixed Artificial tooth to the Length of Free Arm

作　　者：沈庆平 吴伟恂 蔡展文 顾佩华 熊焕国 

机构地区：[1]上海市口腔病防治院,200031 [2]上海市二工业大学

出　　处：《中国口腔种植学杂志》2003年第1期25-27,49,共4页Chinese Journal of Oral Implantology

摘　　要：目的 :研究Branemark种植体在金属桥架固定全口义齿修复中游离臂长度对应力传导的影响。方法 :以一个实际病例 ,应用三维有限元法 ,对10mm、15mm、20mm三种不同长度的游离臂 ,在垂直和侧向不同载荷受力时 ,对种植体骨界面的应力分布进行分析。结果 :(1)Branemark种植固定义齿远中游离臂末端种植体皮质骨界面的应力值最大。(2)垂直和侧向加载时 ,随着游离臂长度的增加 ,种植体皮质骨界面的应力相应增加。结论 :远中游离臂过长不利于种植体及其骨界面的应力均匀分布 ,游离臂长度以不超过10mm为安全。Objective:To study the effect of the free arm length of Branemark implants in the restoration for the whole metal bridge fixed artificial teeth on the stress distribution.Method:Three-Dimensional finite element way was used to study the stress distribution to the bone-to-implant interface and implants with free arms in the three different length,i.e.10mm,15mm,and20mm,which was given axial force and lateral force.Reˉsults:(1)The stress value for the bone-to-implant interface at the end of the free arm in the Branemark imˉplant fixed artificial teeth will be the maximum.(2)When the axial force and the lateral force are loaded,the stress to the bone-to-implant interface will increase with the increase of the free arms.Conclusion:The inˉcrease of the free arm will effect the equal stress distribution on the implants and bone to implant interface.It will be safe when the length of the free arm is not longer than15mm.

关 键 词：BRANEMARK种植体 种植固定义齿 游离臂长度 应力分布 三维有限元 全口义齿 牙列缺失 

分 类 号：R783.6[医药卫生—口腔医学] R783.4[医药卫生—临床医学]