摘要
目的：在微机上建立下颌骨三维正交各向异性有限元模型，并模拟咀嚼肌、韧带等边界约束。方法：采用活体青少年人颅为标本，用ＣＴ扫描技术、图形数字化仪等方法在微机上建模，采用柔索约束、受压间隙元等形式进行边界约束。结果：柔索约束形式与咀嚼肌、韧带的约束作用较为一致，受压间隙元能正确模拟对颌牙及关节窝的功能作用。结论：采用柔索约束、间隙元作为下颌骨及髁突的边界条件，可提高模型的相似性，为下颌骨的受力分析奠定基础。
Objective:To construct the mandibular model and simulate the boundary conditions by means of the three dimensional finite element method.Methods: A juvenile mandible, including TMJ, was scanned transversely by CT, then a three dimensional finite element model of mandible was constructed. At the same time, the functions of stomotologic musles and ligaments and the functional actions of temporomandibular joint (TMJ) were simulated by means of cable elements and compressive gap elements respectively.Results: The cable elements were consistent with the functions of stomotologic musles and ligaments, and the gap elements were similar to the boundary conditions of the TMJ and teeth.Conclusion: Cable and gap elements are reasonable boundary conditions of the finite element model of mandible, which will improve the similarity of the model.
出处
《华西口腔医学杂志》
CAS
CSCD
北大核心
1999年第1期29-32,共4页
West China Journal of Stomatology
基金
国家自然科学基金
关键词
下颌骨
有限元
边界约束
三维有限元
mandible\ \ the finite element model\ \ boundary condition\ \ three dimensional finite element method
