不同力作用下微种植体长度和直径的双变量优化分析

发布时间：2018-06-09 22:12

本文选题：有限元分析 + 微种植体　；参考：《华西口腔医学杂志》2014年01期

【摘要】：目的探讨在不同力作用下,长度和直径同时连续变化情况下微种植体尺寸的优化设计,以期为临床上合理选择微种植体尺寸提供理论基础。方法建立长度和直径连续变化的微种植体及周围颌骨组织的三维有限元模型,设定长度变化范围为6~12 mm,直径变化范围为1.2~2.0 mm,在微种植体头部的横槽内分别加载水平力(HF)和复合力(CF),观察长度和直径同时变化对周围颌骨等效应力峰值(Max EQV)及微种植体位移峰值(Max DM)的影响。结果在两种力的作用下,随着长度和直径的增加,颌骨Max EQV和微种植体Max DM均下降,当长度大于9 mm时,各评估指标值较小且变化幅度较小。灵敏度分析显示,直径对评估指标的影响较大。在CF作用下,直径对评估指标的影响较HF作用下显著。结论在本研究所设定的参数范围内,微种植体的长度应不超过9 mm,运用微种植体对牙齿进行转矩控制时,其直径应超过1.2 mm。
[Abstract]:Objective to study the optimal design of microimplant size under different forces and continuous changes in length and diameter so as to provide a theoretical basis for the rational selection of microimplant size in clinic. Methods Three-dimensional finite element models of microimplants and surrounding jaw tissues with continuous changes in length and diameter were established. The change range of length and diameter is 6 ~ 12 mm and 1.2 ~ 2.0 mm respectively. Horizontal force (HFV) and composite force (CFC) are loaded in the transverse groove of the head of the microimplant respectively. The maximum equivalent stress (Max EQV) and the microelement of the surrounding jaw bone caused by the change of length and diameter simultaneously are observed. Implant displacement peak value (Max DM). Results under the action of two kinds of forces, both maxillary Max EQV and microimplant Max DM decreased with the increase of length and diameter. When the length was greater than 9 mm, the evaluation index values were smaller and the range of change was smaller. The sensitivity analysis shows that the diameter has a great influence on the evaluation index. The effect of CF on the evaluation index was more significant than that under HF. Conclusion the length of microimplants should not exceed 9 mm within the parameters set in this study, and the diameter of microimplants should be more than 1.2 mm when the teeth are used for torque control.
【作者单位】：中山大学孙逸仙纪念医院口腔科;
【分类号】：R783.6

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