两种下颌骨三维有限元建模方法的对比研究  

Comparison of 2 methods to establish mandibular three-dimensional finite element model

作　　者：刘珉懿[1] 张劲[2] 

机构地区：[1]重庆医科大学附属口腔医院,口腔疾病与生物医学重庆市重点实验室沙南街门诊部,重庆400015 [2]重庆医科大学附属口腔医院,口腔疾病与生物医学重庆市重点实验室整形美容科,重庆400015

出　　处：《第三军医大学学报》2013年第6期532-535,共4页Journal of Third Military Medical University

摘　　要：目的探讨直接建模和间接建模方法在下颌骨三维有限元建模中的应用。方法使用相同的序列CT图像,应用直接建模和间接建模方法分别建建立下颌骨的三维有限元模型,采用相同边界条件和载荷进行计算,对计算结果进行分析和比较。结果两模型在峰值载荷时的von Mises应力分布情况一致,直接法模型应力集中区域von Mises应力为87～195 MPa,间接法模型为101～153 MPa;应力集中节点时间-应力曲线近似;两模型下颌骨体部、磨牙后区、髁突颈对应节点应力值差异无统计学意义(P>0.05)。结论两种建模方法各有优势,所建模型都能从整体上反映下颌骨的生物力学特性。Objective To apply direct modeling and indirect modeling in the establishment of a three- dimensional finite element model of mandible and temporomandibular joint with high biomechanical similarity. Methods The magnitude and distribution of Von Mises stress in mandibular three-dimensional finite element model established by the direct modeling and indirect modeling was compared and analyzed. Same boundary conditions were adopted. The same level of anterior-posterior impact load at the mental symphysis was analyzed. The results were analyzed and compared. Results In the peak of load, the yon Mises stress distributions of these 2 models were similar. The value of yon Mises stress in stress concentration area of direct modeling ranged from 87 to 195 MPa, and from 101 to 153 MPa in Model B. Paired student＇ s t test was used to analyze the value of each node on 3 corresponding areas of each model, and the results showed that the differences between the 2 modeling had no significant difference （P 〉 0.05 ）. Conclusion These 2 three-dimensional finite element models of mandible established by direct and indirect modeling are of highly biomechanical similarity.

关 键 词：下颌骨 三维有限元分析 建模 

分 类 号：R312[医药卫生—基础医学] R319