天然上颌中切牙与种植体应力规律的三维有限元分析

发布时间：2018-06-06 05:57

本文选题：上颌中切牙 + 种植体　；参考：《中外医学研究》2018年07期

【摘要】：目的:采用三维有限元分析法对天然上颌中切牙与种植体应力分布规律进行分析,为义齿种植与修复提供依据。方法:选择天然牙5种不同解剖分型,利用ANSYS、UGNX等软件,建立三维有限元模型,对种植体与周围局部结构关系进行研究,对种植体与牙长轴不同夹角施加相同静态荷载力,对5种上颌中切牙压根与种植体应力分布情况进行分析。结果:随着加载力角度的增加,种植体与天然牙的等效应力值均呈增大趋势,从0°~90°逐渐上升,且种植体增大的幅度大于天然牙。其中B2分型中,种植体等效应力在0°时最小(17.608 MPa);P1分型中,种植体等效应力在90°时最大(132.1 MPa)。在加载力角度方面,30°~90°时,B1分型中,天然牙等效应力值在90°时达到60 MPa;M1分型中,种植体等效应力在90°时达到149 MPa;加载力角度为0°时,因具有特殊性,因此在P1分型中,天然牙等效应力达到最大值(10 MPa);M1分型中,种植体等效应力达到最大值(28 MPa)。结论:与牙根应力分布相比,种植体应力分布区间更小。表明随着咬合力度的增大,天然牙与种植体受力呈正比,并且在承受咬合力方面,天然中切牙大于种植体。
[Abstract]:Objective: to analyze the stress distribution of natural maxillary central incisor and implants by three dimensional finite element analysis (FEM) in order to provide the basis for implant and restoration of denture. Methods: five different anatomical types of natural teeth were selected, and three dimensional finite element model was established by using ANSYS UGNX software. The relationship between implant and surrounding local structure was studied, and the same static load force was applied to the implant and tooth at different angles of long axis. The stress distribution of 5 kinds of maxillary central incisors was analyzed. Results: with the increase of loading force angle, the equal effect force value of implant and natural tooth increased gradually from 0 掳to 90 掳, and the range of implant increase was larger than that of natural tooth. In B2 typing, the implant equivalent stress was the lowest at 0 掳at 17.608 MPA / L, and the maximum at 90 掳was 132.1 MPA / a. When the loading force angle is 30 掳/ 90 掳, the equal effect force value of natural teeth reaches 60 MPA / M 1 typing at 90 掳, the equivalent stress of implant reaches 149 MPA at 90 掳, and when the loading force angle is 0 掳, because of its particularity, it is in P1 typing. In the classification of natural teeth, the equivalent stress reached the maximum value of 10 MPA / M 1, and the maximum stress of implant was 28 MPA / L. Conclusion: compared with root stress distribution, implant stress distribution range is smaller. The results show that the force of natural teeth is proportional to that of implants with the increase of occlusal force, and the natural central incisors are larger than implants in bearing bite force.
【作者单位】：富源县人民医院;曲靖市第一人民医院附属口腔医院;
【分类号】：R783.6

【相似文献】