摘要
以基于STL的网格实体建模方法,设计了修复体、基牙、牙周膜、骨皮质,骨松质和牙槽骨的三维几何模型。通过有限元分析,模拟了四种载荷下不同支架和洞型设计对修复体应力分布及强度的影响,发现与纯树脂模型相比,传统纵向设计使修复体牙合面的σ1最大值升高了6.22%,而改良后的支架可有效降低各危险区的应力极值,提高修复体的强度;洞型的改良设计能够减小固位体接触面上的最大剪应力,对粘结剂层起到很好的保护作用;通过加宽连接体及减小桥体颊舌径尺寸可进一步缓解应力集中。
The method of modeling and mesh generation about 3-unit tooth/restoration complex were established. The three-dimensional finite element models were subjected to four types of occlusal load applied to pontic element to evaluate 3 fiber framework designs and 3 cavities preparation configurations. By comparing the difference of stress distribution, following conclusions were obtained ： the principal stress under buccal-lingual cusp load in traditional fiber framework pontic increased by 6.22% compared to that in pure composite resin pontic; optimized fiber framework obviously reduced stress level under any load; modified cavities exhibited better stress transfer and decreased share stress at adhesive interface than traditional cavities.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
2006年第4期756-761,共6页
Journal of Biomedical Engineering
关键词
粘结桥
玻璃纤维
复合树脂
STL
FEA
Resin-bonded fixed partial denture Glass fiber Composite resin STL FEA
