含完整牙列下颌骨生物力学模型的建立

Reconstruction of the three-dimensional finite element model of dentitional mandible with the reverse engineering software

目的:通过CT结合逆向工程软件建立含完整牙列的下颌骨三维有限元模型,为进一步生物力学研究奠定基础。方法:选择健康成年志愿者1名,X线检查无颌骨疾患,取得其下颌骨CT资料,利用Mimic及Geomagic软件建立成年人含牙列下颌骨三维有限元模型。结果:建立的含完整牙列下颌骨三维有限元模型精确反映了下颌骨外形及内部解剖特点,实现了对下颌骨不同结构的精确区分,共得到80047个单元,模型加载验证该模型的有效性。结论:该模型的建立,可有效实现对下颌骨的生物力学研究,更加接近临床实际要求。

PORPUSE： Using reverse engineering software to reconstruct three-dimensional finite element model of mandible with the dentition,with the aim to lay a foundation for further biomechanical research.METHODS： Imaging samples of one case with no osseous disease or osteomyelisis were selected from the volunteer.Informed content was obtained.Three-dimensional finite element model of the mandible with the dentition was reconstructed with Mimics,Geomagic and Ansys softwares.RESULTS： Using reverse engineering software in combination with CT technique,the three-dimensional finite element model of the mandible with dentition was reconstructed.The model accurately showed their anatomic characteristics and discrimination of inner structure.The model was divided into 80047 tetrahedron elements.The results of Von Mises stress distribution and force transmission paths found in the model were coincident with the result from other studies.CONCLUSIONS： This model is effective for further biomechanical research,and is beneficial to clinical research.