种植体不同设计参数对下颌骨牙齿种植的影响  

Effects of Different Implant Design Parameters on Mandibular Tooth Implantation

作　　者：聂秀吉 李淑娴[1] 马宗民[1] 高文波 NIE Xiuji;LI Shuxian;MA Zongmin;GAO Wenbo(School of Mechanical Engineering,Dalian University,Dalian 116622,Liaoning,China)

机构地区：[1]大连大学机械工程学院,辽宁大连116622

出　　处：《医用生物力学》2021年第6期890-895,共6页Journal of Medical Biomechanics

基　　金：国家自然科学基金项目(11602047,11572066);辽宁省教育厅科学研究经费项目(jyt-dldxfw202004)。

摘　　要：目的建立不同设计参数的种植体-下颌骨模型,观测种植体及周围骨质应力分布,分析不同设计参数对下颌骨牙齿种植的影响。方法基于结构特征参数(种植体直径、螺纹深度、基台穿龈高度、螺纹形态),设计8组种植体模型,并分别进行下颌骨整体模型的装配。对模型施加静态150 N垂直、斜向45°两种载荷,分析骨组织和种植体von Mises应力峰值,探讨对von Mises应力峰值最敏感的种植体结构参数变量。结果斜向载荷比垂直载荷对颌骨会产生更大的应力峰值。种植体直径是影响皮质骨von Mises应力峰值的关键因素;螺纹深度是影响松质骨von Mises应力峰值的关键因素;基台穿龈高度也会对颌骨von Mises应力峰值产生影响,但影响程度不如螺纹深度和种植体直径明显;螺纹形态对颌骨von Mises应力峰值几乎没有影响。结论不同的种植体设计参数会影响颌骨不同组织的应力峰值,对于个性化种植需要慎重考虑种植体参数的选择。研究结果为口腔种植体的结构参数设计提供理论指导,为口腔种植手术精准预测提供参考。Objective To establish the implant-mandible model with different design parameters,observe stress distributions on the implant and surrounding bone,and analyze the influence of different design parameters on dental implant of the mandible.Methods Eight implant models were designed based on structural characteristic parameters(implant diameter,thread depth,height of abutment through gingiva,thread shape),and assembly of the mandibular model was performed respectively.The models were applied with static 150 N vertical and oblique 45°loads,so as to analyze peak von Mises stress of the implant and bone tissues and explore the structural parameter variables of implant most sensitive to peak von Mises stress.Results The peak stress of the mandible was larger under inclined load than that under vertical load.Implant diameter was the key factor affecting the peak von Mises stress of cortical bone,while thread depth was the key factor affecting the peak von Mises stress of cancellous bone.The peak von Mises stress was also affected by the height of abutment through gingiva,but the effect was not as significant as thread depth and implant diameter.Thread shape had little effect on the peak von Mises stress of the mandible.Conclusions Different implant design parameters can affect the peak stress of different tissues of the mandible,so it is necessary to carefully consider the selection of implant parameters for personalized implants.This study can provide theoretical guidance for structural parameter design of oral implants and provide references for accurate prediction of oral implants.

关 键 词：种植体直径 螺纹深度 基台穿龈高度 螺纹形态 有限元分析 

分 类 号：R318.01[医药卫生—生物医学工程]