Nakamura Keiko, Tajima Kiyoshi, Chen Ker-Kong, Nagamatsu Yuki, Kakigawa Hiroshi, Masumi Shin-ich
Division of Oral Reconstruction and Rehabilitation, Department of Oral Functional Reconstruction, Kyushu Dental College, Kitakyushu, Japan.
Proc Inst Mech Eng H. 2013 Dec;227(12):1312-8. doi: 10.1177/0954411913508054. Epub 2013 Sep 27.
This study focused on the application of novel finite-element analysis software for constructing a finite-element model from the computed tomography data of a human dentulous mandible. The finite-element model is necessary for evaluating the mechanical response of the alveolar part of the mandible, resulting from occlusal force applied to the teeth during biting. Commercially available patient-specific general computed tomography-based finite-element analysis software was solely applied to the finite-element analysis for the extraction of computed tomography data. The mandibular bone with teeth was extracted from the original images. Both the enamel and the dentin were extracted after image processing, and the periodontal ligament was created from the segmented dentin. The constructed finite-element model was reasonably accurate using a total of 234,644 nodes and 1,268,784 tetrahedral and 40,665 shell elements. The elastic moduli of the heterogeneous mandibular bone were determined from the bone density data of the computed tomography images. The results suggested that the software applied in this study is both useful and powerful for creating a more accurate three-dimensional finite-element model of a dentulous mandible from the computed tomography data without the need for any other software.
本研究聚焦于新型有限元分析软件的应用，该软件用于根据人类有牙下颌骨的计算机断层扫描数据构建有限元模型。有限元模型对于评估下颌骨牙槽部分在咬合时施加于牙齿的咬合力所产生的力学响应是必要的。仅将市售的基于患者特定通用计算机断层扫描的有限元分析软件应用于有限元分析以提取计算机断层扫描数据。从原始图像中提取带有牙齿的下颌骨。经过图像处理后提取牙釉质和牙本质，并从分割后的牙本质创建牙周韧带。使用总共234,644个节点以及1,268,784个四面体单元和40,665个壳单元构建的有限元模型具有合理的准确性。非均质下颌骨的弹性模量根据计算机断层扫描图像的骨密度数据确定。结果表明，本研究中应用的软件对于从计算机断层扫描数据创建更准确的有牙下颌骨三维有限元模型既有用又强大，无需任何其他软件。
