植体弹性模量变化对牙种植体和骨组织应力分布的影响

发布时间：2018-04-03 00:30

本文选题：牙种植体　切入点：有限元分析　出处：《医用生物力学》2017年04期

【摘要】：目的通过三维有限元法分析,探讨植体弹性模量变化对牙种植体和骨组织应力分布的影响,为新型牙种植系统的研究提供实验依据。方法应用螺旋CT数据,建立下颌骨和种植体模型。设定植体弹性模量分别为110、90、70、55和40 GPa,模拟咬合状态,在垂直、水平、斜向分别施加300、100、130 N静止载荷,计算并分析各组在3种载荷下植体周围骨组织和牙种植体各部分的应力。结果随着植体弹性模量的降低,水平和斜向载荷下牙种植体周围皮质骨受到的应力会随之降低,种植体的应力也呈逐渐减小趋势。结论降低牙种植体材料的弹性模量有利于载荷在种植体和周围骨组织中的传导,降低种植义齿晚期失败的风险。
[Abstract]:Objective to study the effect of elastic modulus on the stress distribution of dental implants and bone tissue by three dimensional finite element method (FEM), and to provide experimental basis for the study of new dental implant system.Methods the mandibular and implant models were established with spiral CT data.The elastic modulus of the implant was set at 110 ~ 90 ~ 7055 and 40 GPA respectively. The occlusal state was simulated and 300100130 N static load was applied in vertical, horizontal and oblique direction, respectively. The stress of the bone tissue around the implant and each part of the dental implant was calculated and analyzed under three kinds of loads.Results with the decrease of elastic modulus of implant, the stress of cortical bone around dental implant decreased under horizontal and oblique loading, and the stress of implant decreased gradually.Conclusion reducing the elastic modulus of dental implants is beneficial to the conduction of load in implants and surrounding bone tissues, and reduces the risk of late failure of implant dentures.
【作者单位】：上海交通大学医学院附属第九人民医院口腔修复科上海市口腔医学重点实验室;上海交通大学材料科学与工程学院;
【基金】：上海高校高峰高原学科建设项目上海交通大学医工交叉研究基金(YG2014MS02)
【分类号】：R783.6

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