基于Micro-CT初步分析沟裂结构对下颌第一磨牙应力分布的研究

 目的 探讨沟裂结构对应力分布的影响。方法 建立包含沟裂的下颌第一磨牙有限元模型。采用Micro-CT扫描及ANSYS软件建立包含及不包含面沟裂的下颌第一磨牙有限元模型,并加载500 N载荷,对比两模型应力分布情况。结果 两模型中,拉应力峰值均出现在中央窝沟处,实验组中拉应力峰值为92.48 MPa,对照组为71.34 MPa,实验组拉应力峰值及沟裂处拉应力范围均大于对照组。结论 通过对下颌第一磨牙有限元模型进行力的初步加载,发现面沟裂结构的存在影响力在下颌第一磨牙的分布,对进一步研究隐裂牙受力情况研究提供了基础。

Influence of fissures on the mandibular first molar based on digital images by Micro-CT

Objective To investigate the effect of grooves and fissures on stress distribution of the right mandibular first molar.Methods An intact first mandibular molar was scanned with Micro-CT, before ANSYS14.0 software was used to establish a three-dimensional finite element model of the right first molar with or without grooves. 500N was loaded to compare the stress distribution in the two models.Results n the two models, the tensile stress appeared in the fovea groove. The peak tensile stress was 92.48 MPa in the experimental group and 71.34 MPa in the control .The stress peak value and distribution of tensile stress in the experimental group were significantly greater than those in the control group. Conclusion After loading on the two models, it is found that the existence of the grooves structure affects the stress distribution of the mandibular first molar, which requires further research.