A Study on Abutment Forms and materials of Restorations utilizing Adhesion

粘合修复体基台形式和材料的研究

• 批准号: 11671919
• 负责人: KOBAYASHI Kunihiko
• 金额: $ 2.3万
• 依托单位: HOKKAIDO 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 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11671919/
• 关键词: Adhesion; Abutment form; Finite element method; Stress analysis

The aim of this study was to evaluate the possibility for clinical use of experimental abutment forms utilizing adhesion by means of the three-dimensional finite element method (FEM). The FEM models were created referring to the extracted human maxillary first premolar. Three experimental abutment forms, which had no axial wall, were as follows ; Form1 : Occlusal surface was reduced by 1.5mm, Form2 and 3 : The crown was cut perpendicularly to tooth axis at a distance of 2mm (Form 2) or 4mm (Form3) from central groove. The restorations were made from the 3types of materials, resin composite, porcelain and Gold base alloy. Form 4 : Abutment form was same as Form 3, and the restoration was made from porcelain and resin composite (occlusal surface was made from porcelain by 1.5 mm thickness and body was made from resin composite.). Restorations were bonded to the abutments by an adhesive resin. A vertical load of 500N was applied to the center of buccal cusp ridge. The stress distribution was solved by means of the ANSYS/Structual 5.6 (ANSYS, Inc).The stress in the adhesives was smaller than compressive strength and tensile strength of the adhesive resin, even if 500N was loaded. It was indicated that these experimental abutment tooth forms were useful in clinic and it is necessary to choose the restorative material suitable for each abutment form.

本研究的目的是通过三维有限元法（FEM）评估临床使用的实验基牙形式利用粘附的可能性。参照离体上颌第一前磨牙建立有限元模型。实验设计了3种基牙形式，均为无轴向壁，形式1：咬合面减少1.5mm，形式2和形式3：在距中心沟2 mm或4 mm处垂直于牙轴切冠。分别用树脂、瓷、金基合金3种材料制作了牙体缺损修复体。表格4：基台形式与形式3相同，修复体由陶瓷和树脂复合材料制成（咬合面由1.5 mm厚的陶瓷制成，主体由树脂复合材料制成。）。修复体通过粘接树脂与基台粘接。在颊侧牙尖嵴中心施加500 N的垂直载荷。用ANSYS/Structural 5.6（ANSYS，Inc.）软件求解应力分布，在500 N载荷下，粘接剂中的应力小于粘接剂树脂的抗压强度和抗拉强度。结果表明，这些基牙实验牙型在临床上是有用的，选择适合于各种基牙实验牙型的修复材料是必要的。