模拟上唇压力对腭裂上颌骨复合体三维有限元模型的影响研究  

The influence of imitating lip pressure on the maxillary complex finite element model for cleft palate

作　　者：文抑西[1] 石冰[2] 杨壮群[1] 

机构地区：[1]西安交通大学口腔医院颌面外科,710004 [2]四川大学华西口腔医学院唇腭裂外科

出　　处：《实用口腔医学杂志》2008年第2期248-251,共4页Journal of Practical Stomatology

基　　金：高等学校优秀青年教师教学和科研奖励基金(1999);陕西省科技攻关项目(编号:2002K10-G8(7))

摘　　要：目的:研究唇裂修复术后上唇压力对腭裂上颌骨复合体的影响。方法:对一位14岁单侧完全性腭裂的患者的头部作连续冠状扫描。应用DICOM技术获取扫描图片并采用图像处理软件和工程建模软件对患者的上颌骨复合体进行三维有限元建模。模拟正常上唇的压力对上颌骨复合体进行加载工况。结果:模型显示在相当于两侧眶下区、牙槽突前段以及翼突下端有应力集中区。健侧上颌骨段的变形大于对侧,导致健侧梨状孔缘成为剪应力集中区域。模型向后、向下移位,牙槽突裂隙缩小。结论:腭裂上颌骨模型在受力后的表现与临床上的唇裂术后腭裂上颌骨观察到的变化一致。所建立的模型研究为临床唇腭裂研究提供了一个新方法。Objective：To study the influence of lip pressure on the finite element maxillary complex in a cleft palate patient.Methods：Took continuous CT scanning for maxillary complex of a 14-year-old cleft palate patient.Transferred CT images with DICOM to HP mobile workstation.To built up a 3-dimentional finite element maxillary complex model with Photoshop and ANSYS software.Imitating normal lip pressure was loaded on to anterior surface of maxillary segments.Results：The model was presented with several stressed areas,infraorbital area,anterior part of alveolar segment and lower part of pterygoid process respectively.The long segment was transformed medially which leads to the greater shear stress on the piriform edge.The dimension of the alveolar cleft was decreased because the transformation.Conclusion：The presentation of the finite model after loading stress is similar to the clinical observations for the cleft maxillary complex after lip repair.The finite element method could be the substitute way for the animal experiment.

关 键 词：腭裂 上颌骨复合体 有限元模型 上唇压力 

分 类 号：R782[医药卫生—口腔医学]