冲击载荷作用下种植体周围牙槽骨组织的动力学分析  

A dynamic analysis of peri-implant alveolar bone under impact load

作　　者：李至睿 李恺 辛海涛 侯兵[2] 刁晓鸥 安佰利 

机构地区：[1]军事口腔医学国家重点实验室陕西省口腔医学重点实验室第四军医大学口腔医院修复科,陕西西安710032 [2]西北工业大学航空学院结构与力学工程系,陕西西安710072

出　　处：《牙体牙髓牙周病学杂志》2015年第12期718-722,共5页Chinese Journal of Conservative Dentistry

基　　金：陕西省科学技术研究发展计划项目(2011K12-68)

摘　　要：目的:研究冲击载荷作用下种植体周围牙槽骨组织的受力情况和损伤特点。方法:应用逆向工程软件建立包含种植体、皮质骨和松质骨的有限元模型;然后在Abaqus有限元软件中设置载荷-时间历程曲线,并导入冲击载荷波形来实现冲击载荷加载,分析不同冲击载荷作用下骨组织受力情况和动力学特征。结果:当种植体受到冲击载荷作用时,种植体颈部皮质骨首先出现应力变化,然后应力波从颈部向颊舌侧松质骨内扩散;在整个加载过程中,种植体颈部和底部的牙槽骨组织为主要受力区,其Mises应力值明显大于静载荷并随载荷方向而改变,当水平向加载时种植体周围的骨组织受力最大。结论:冲击载荷作用下,骨组织所受应力明显大于静载荷作用,其对骨组织造成的损伤在种植体颈部皮质骨和种植体周围牙槽骨处。AIM： To investigate the stress distribution and damage characteristics of peri-implant bones under impact load by finite element model（ FEM） of implant and alveolar bone. METHODS： Reverse engineer software was used to establish the FEM including the implant,cortical and cancellous bone. Load-time history curve was set in Abaqus finite element software and the impact load wave form was imported to analyze the stress distribution and dynamic characteristics of the alveolar bone around the implant under impact load. RESULTS： Under impact load,the cortical bone around the implant changed firstly,then the stress wave spread from the neck to the peri-implant bone.The alveolar bone around the implant neck and bottom was the main area affected by the stress under the impact load.The Mises value under impact load was significantly higher than that of static load,and the Mises value was influenced by the direction of the impact load. When the load was hovizontal to the implant,the stress of the peri-implant reached peak value. CONCLUSION： Impact load causes more damage to bone tissues than static load. Bone damage under impact load is not limited to the cortical bone around implant neck,the cancellous bone around implant bottom can als be affected.

关 键 词：冲击载荷 种植体 有限元 动力学分析 生物力学 

分 类 号：R782.1[医药卫生—口腔医学]