下颌牙列数字化生物力学模型的建立  

Establishment of the Three - dimensional Finite Element Model of Mandibular Dentition

作　　者：殷学民[1] 李燕[1] 张美超[2] 任晓旭[1] 刘啸[1] 

机构地区：[1]南方医科大学南方医院口腔颌面外科,广东广州510515 [2]南方医科大学解剖教研室

出　　处：《解剖与临床》2012年第1期32-35,共4页Anatomy and Clinics

基　　金：广东省高校自然科学研究重点项目（编号：062606）

摘　　要：目的：通过CT数据结合逆向工程软件建立下颌牙列的数字化生物力学模型。方法：选择健康成年志愿者1名，X检查无颌骨疾患，利用其下颌骨薄层扫描CT数据及mimics及freeform软件建立成年人下颌牙列的数字化模型。结果：该模型精确反映了下颌牙列的外形及解剖特点，共得N50184个节点和31420个单元，实现了对下颌牙列解剖区域的精确划分。咬合加载后下颌骨应力分布集中于下颌骨体部及升支部，且下颌骨升支前缘、后缘及下颌骨下缘有明显应力集中区域。结论：建立了由单个牙齿组成的完整下颌牙列的数字化生物力学模型，并对此验证得出正常下颌骨的力学分布状况，为下颌骨缺损重建及牙列的力学研究奠定基础。Objective： To establish the three - dimensional finite element model of mandible dentition with the reverse engineering technology. Methods： One normal volunteer was selected. X - ray routine examination was performed to exclude mandible diseases. The three - dimensional finite element model of the mandible dentition was es- tablished by Mimics, Freeform and Ansys softwares on the basis of the imaging data obtained from the head spiral CT TLC scanning. Results： The three - dimensional finite element model of the mandible dentition accurately showed their anatomic structure and characteristics , 50184 nodes and 31420 units were established. The stress distribution was concentrated in the mandible body, ascending branch and the leading edge of mandible ramus. Conclusions ：The establishment of the finite element model of mandible dentition is highly precise and verisimilar, and it verifies the biomechanie distribution of the normal mandible , which can be widely applied in the biomechanical research of the mandible defection or dentition.

关 键 词：下颌骨 牙列 数字化 生物力学 

分 类 号：R781.05[医药卫生—口腔医学] R318.01[医药卫生—临床医学]