In-vitro study on tooth fracture of bridge abutment tooth

桥基牙断裂的体外研究

• 批准号: 24792062
• 负责人: SHIN Chiharu
• 金额: $ 2.75万
• 依托单位: Tokyo Medical and Dental University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24792062/
• 关键词: 光弾性実験; 支台築造; ブリッジ

Two-dimensional simulation models of three-unit bridges were constructed, and stress distribution around the abutment teeth and alveolar bone was analysed and the fringe orders were recorded. Metal Core and composite resin core including a fiber post (core materials) and zirconium oxide (bridge material) were selected. Materials of this model were chosen so that it might become the same as the ratio of Young's modulus of alveolar bone, dental root, metal core, Fiber post, and composite resin. Moreover, it was necessary to search a material with the Young's modulus at the same level as an alveolar bone model, the ratio of the matrix of the epoxy resin, the hardener, and the softener was changed and measured the Young's modulus of mixtures.As a result, stress distribution of the abutment tooth with metal core and resin core including a fiber-post was different at cervical area of the root and apical area of the alveolar bone.

建立了三单元桥的二维仿真模型，分析了基牙和牙槽骨周围的应力分布，并记录了边缘序列。选择了金属芯和复合树脂芯，包括纤维桩（芯材）和氧化锆（桥材）。模型材料的选择与牙槽骨、牙根、金属芯、纤维桩、复合树脂的杨氏模量之比一致。此外，有必要寻找杨氏模量与牙槽骨模型相同的材料，改变环氧树脂、硬化剂和软化剂的基质比例，测量混合物的杨氏模量。结果表明，金属核和树脂核含纤维桩的基牙在牙根颈区和牙槽骨尖区应力分布不同。