The Study of the AppropriateAbutment's Design of the Resin-Bonded Bridge with the Long Durability Analyzed by Fracture Mechanics

断裂力学分析长耐久性树脂桥合适桥台设计研究

• 批准号: 11671942
• 负责人: SHINOHARA Naoyuki
• 金额: $ 2.56万
• 依托单位: Kagoshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11671942/
• 关键词: Rein-bonded Bridge; Finite Element Analysis; Abutment; Luting Material; Von Mises Stress

Resin-bonded bridge has now come to be a routine for missing teeth treatment. There are some aspects that lead resin-bonded bridge to be a failure, such as (1) Inadequate bond strength, (2) Inadequate design of metal retainer (3) Poor choice of metal alloy. Since the introduction of resin-bonded bridge, many researches have been done on metal alloys and their treatment. But an absolute abutment's design has not been established yet.In 1999, authors focused mainly on retainer design and luting material layer to know the proper preparation for the resin-bonded bridge, and modeled the exact preparation design of abutment tooth of retainer with or without "wing", "groove" and "isthmus" by using three dimensional finite element technique. As a result, the preparation design with wing on the missing tooth side and luted with PMMA-resin cement is superior on the durability of the resin-bonded bridge.From 2000 to 2001, this project has been proceeding by two methods. First, tooth abutment, periodontal membrane, alveolar bone and resin-bonded bridge have been modeled by three-dimension, and the effect of the absorption of the periodontal tissue on the stress distribution of the luting material has been evaluated. Secondarily, the effects of tooth mobility, abutment design parameters and the crack between tooth and retainer on the durability of the resin-bonded bridge have been analyzed by using two-dimensional model with the horizontal tooth mobility.

树脂粘结桥现已成为缺牙治疗的常规方法。导致树脂粘结桥失败的原因有：（1）粘结强度不足;（2）金属固位体设计不当;（3）金属合金选择不当。自树脂桥问世以来，人们对金属合金及其处理进行了大量的研究。1999年，作者主要从固位体设计和粘接材料层两个方面探讨了树脂桥的基牙预备，并利用三维有限元技术模拟了固位体基牙预备的具体设计，包括有无“翼”、“槽”和“峡”。结果表明，在缺失牙侧设置翼部，并采用PMMA-树脂粘固剂粘接的预备设计在树脂粘结桥的耐久性方面具有上级优势。首先，建立了基牙、牙周膜、牙槽骨和树脂粘结桥的三维有限元模型，分析了牙周组织的吸收对粘结材料应力分布的影响。其次，采用二维有限元模型分析了牙体水平移动、基牙设计参数以及牙体与固位体之间的裂纹对树脂粘结桥耐久性的影响。

项目成果

Arikawa,H., Kanie,T., Fujii,K., Shinohara,N., Takahashi,H. and Inoue,K.: "A method for evaluating color stability of light-cured composite resin using an experimental filter"Dent Mat J. 19. 338-345 (2000)

有川，H.，坎江，T.，藤井，K.，筱原，N.，高桥，H.

松下容子,篠原直幸 他: "静解析による耐久性に優れる接着性補綴物支台歯形状の適正化"平成11年度日本補綴歯科学会九州支部総会 日本補綴歯科学会九州支部学術講演会抄録集. 6-6 (1999)

松下洋子、筱原直之等：“利用静态分析优化高耐久性粘合修复体基牙形状的形状”1999年日本口腔修复学会九州分会大会摘要日本口腔修复学会九州分会学术讲座第6期。 -6 (1999)

篠原直幸: "人工歯の力学的特性と挙動(静解析による耐久性に優れる接着性補綴物支台歯形状の適正化)"平成11年度九州大学応用力学研究所共同研究成果 第3報. (印刷中). (2000)

Naoyuki Shinohara：“人造牙齿的机械特性和行为（使用静态分析优化基牙形状以实现高度耐用的粘合修复体）”1999年九州大学应用力学研究所联合研究结果第3次报告（2000年）。 ）

松下容子,篠原直幸 他: "静解析による耐久性に優れる接着性補綴物の支台歯形状の適正化"平成11年度日本補綴歯科学会九州支部総会日本補綴歯科学会九州支部学術講演会抄録集. 6-6 (1999)

松下洋子、筱原直之等：“利用静态分析优化高耐用粘合修复体基牙形状”1999年日本口腔修复学会九州分会大会摘要日本口腔修复学会九州分会学术讲座。 6-6 (1999)