颅上颌复合体三维有限元模型的建立和初步应用  

Establishment and primary analysis of three-dimensional finite element model of cranial-maxillary complex

作　　者：许崇涛[1] 孙庚林[1] 周健[1] 吴炜[1] 王鹏林[2] 

机构地区：[1]天津医科大学总医院口腔科,300052 [2]天津理工大学CAE中心

出　　处：《实用口腔医学杂志》2009年第1期51-54,共4页Journal of Practical Stomatology

基　　金：天津市高等学校科技发展基金项目(编号:20030322)

摘　　要：目的:建立生物相似性和力学相似性较高的颅上颌复合体三维有限元模型,为进一步分析颅上颌复合体的生物力学行为打下基础。方法:用螺旋CT断层扫描技术,ANSYS有限元软件等方法在计算机上建立颅上颌复合体三维有限元模型,对功能状态下颅上颌复合体应力分布进行分析。结果:建立了颅上颌复合体三维有限元模型;在正中咬合时,颅上颌复合体Von-Mises应力梨状孔侧缘尖牙支柱处为7.997 MPa、颧牙槽嵴支柱处为22.185 MPa、颧弓区为14.830 MPa,翼突处为32.959 MPa。结论:该方法建立的颅上颌复合体三维有限元模型,具有较好的生物相似性和力学相似性,可作为今后深入研究的原始模型;功能状态下,颅上颌复合体梨状孔侧缘尖牙支柱、颧牙槽嵴支柱、颧弓区、翼突处为应力较为集中的区域。Objective： To establish threedimensional finite element model （3- D FEM） of cranialmaxillary complex with better similarity, and to evaluate the bio-mechanics of cranial-maxillary complex. Methods： CT scann technology and the finite element software （ANSYS） were used to take and analyze the data to establish 3-D FEM of cranial-maxillary complex. The stress distribution of functional condition of cranio-maxillary complex was analysed. Results：1. A 3-D FEM of cranial-maxillary complex was established, which consisted of 170 840 nodes and 673 618 elements. 2. When cranial-maxillary complex was under working occlusion, the Von-Mises stress of the caninus brace was 7. 997 MPa, the zygomaticoalveolar crest brace was 22. 185 MPa, the zygomatic arch was 14.830 MPa, the pterygoid process was 32. 959 MPa. Conclusion： 1. The above mentioned methods are proved to be feasi- ble in the establishment of 3- D FEM of cranialmaxillary complex and could improve the biomechanical similarity of FEM effectively. 2. There are higher Von-Mises stresses at caninus brace, zygomaticoalveolar crest brace, zygomatic arch, pterygoid process in the working occlusion.

关 键 词：颅上颌复合体 有限元 应力 

分 类 号：R782[医药卫生—口腔医学] R318.01[医药卫生—临床医学]