颌面骨三维有限元模型中骨缝实体模型的建立

Sutural physical model building in the three-dimensional finite-element model of maxillofacial bones

目的在颌面骨三维有限元模型中建立与上颌骨生长密切相关的4条骨缝实体模型。方法以1名个别正常、牙周组织健康、无颞下颌关节疾病的16岁女性为建模素材,应用螺旋CT扫描与有限元法相结合的方法,建立颌面骨的三维有限元模型,并在此基础上建立额颌缝、颧颌缝、颞颧缝、翼腭缝4条与上颌骨生长有关的骨缝实体模型。结果生成了具有86 575个节点、485 915个单元的颌面骨三维有限元模型,其中包括额颌缝、颧颌缝、颞颧缝、翼腭缝4条实体骨缝。结论获得了生物相似性良好的颌面骨三维有限元模型。

Objective To build the physical model of four suturae which are related to the growth of maxilla in the three-dimensional finite-element model of maxillofacial bones.Methods A 16 years old volunteer with individual normal occlusion,good periodontium health condition and without diseases of temporomandibular joint was chosen to be the material of modeling.The three-dimensional finite-element model of the volunteer＇s maxillofacial bones was built using the CT scan and the finite-element modeling method.Finally we built the physical model of four suturae which were related to the growth of maxilla in the model of maxillofacial bones.Results The model of maxillofacial bones with 86 575 nodes and 485 915 elements was generated.This model contained four suturae including sutura frontomaxillaris,sutura zygomaticomaxillaris,sutura temporozygomatica and sutura pterygopalatine.Conclusion A three-dimensional finite-element model of maxillofacial bones with good biological similarity was developed.