目的建立成人颅面复合体三维有限元模型,为进一步研究腭部种植支抗进行上颌扩大的可行性及其与牙支抗的对比研究建立数学模型基础。方法采用螺旋CT断层扫描成年人颅面复合体,计算机图像处理和转录技术,自编程序和ANSYS软件相结合建立颅面复合体的三维有限元模型。结果建立了具有良好几何相似性和生物力学相似性的颅面复合体三维有限元模型。结论模型精确地重建了骨密质和骨松质成分,适合用于上颌快速扩大术(RME)的生物力学分析。
Objective To construct a three-dimensional finite clement model of adult craniofacial complex for the further investigation of the feasibility of palatal implant anchorage for RME in adults and the comparative study between the tooth-borne RME and the bone-borne one. Methods Spiral CT was used to scan adult craniofacial complex,and the computer image processing and transcription technique and ANSYS were employed to establish the three dimensional finite element model. Results A three dimensional finite element model was successfully constructed,which had great geometrical characters and biomechanical similarity. Conclusions This model precisely reconstructed cortical and cancellous bone as what they really are,which is suitable for biomechanical analysis of RME.