光滑柱状颈部构型的微型种植体-骨界面应力分布的三维有限元分析  

Biomechanical Effect of Cervical Cylindrical Implant on Stress Distribution of Implant-bone Interface Using Finite Element Analysis

作　　者：戴敬哲[1] 单丽华[1] 李晨曦[1] 周冠军[1] 郄会[1] 

机构地区：[1]河北医科大学第二医院口腔正畸科,河北石家庄050000

出　　处：《口腔医学研究》2012年第8期772-774,779,共4页Journal of Oral Science Research

基　　金：河北省科技支撑项目(编号:08276101D-4)

摘　　要：目的:探索微型种植体颈部柱状构型对骨界面应力分布的影响。方法:设定种植体颈部为光滑柱状结构,高度分别为0mm、0.5mm、1mm、1.5mm、2mm。分别建立1mm、2mm皮质骨厚度的微型种植体-颌骨有限元模型,比较正畸加载下骨组织内应力分布的情况。结果:颈部柱状种植体-骨界面应力分布明显均匀,传统螺纹种植体-骨界面应力分布较集中。颈部柱状高度的变化对骨界面应力分布影响不大。结论:本三维有限元分析结果表明颈部柱状结构能明显改善微型种植体-骨界面应力分布。Objective： To observe the influence of cervical cylindrical length on stress distribution of mini-implant - bone interface. Methods： Setting the length of cervical threadless part were 0ram, 0. 5mm, lmm, 1. 5mm, 2mm, respectively. Ten implant-jaw models were obtained for conventional and cervical cylindrical mini-implant with cortical bone 1 or 2mm thick. The authors calculated the maximum stress value and stress distribution on the bone elements under orthodontic loading. Results： With the conventional mini-implant models, the peak stresses were much greater than that in the cervical cylindrical mini-implant models. With the length of cervical cylindrical part increasing, the stress peak values of bone interface decreased, but did not change significantly. Conclusion： This FEA results have demonstrated that the cervical cylindrical mini-implant can reduse maximusum stress value to facilitate successful placement.

关 键 词：支抗微型种植体应力分布有限元分析 

分 类 号：R783.5[医药卫生—口腔医学]