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.

这项研究的目的是评估通过三维有限元方法（FEM）使用粘附的实验基台临床使用的可能性。创建了FEM模型，指的是提取的人类上颌第一前磨牙。三种没有轴向壁的实验基台形式如下。 Form1：将咬合表面降低1.5mm，form2和3：从中央凹槽的2mm（2）或4mm（form3）的距离垂直于牙齿轴垂直切割到牙齿轴。修复体是由3材料，树脂复合材料，瓷器和金底合金制成的。形式4：基台形式与表格3相同，并由瓷器和树脂复合材料制成（咬合表面由瓷器厚度为1.5毫米，厚度为1.5毫米，并且由树脂复合材料制成。）。粘合剂树脂将修复体粘合到基台上。将500N的垂直载荷施加到颊尖脊的中心。通过ANSYS/结构5.6（ANSYS，INC）来求解应力分布。即使加载了500N，粘合剂的应力小于抗压强度和粘合剂树脂的拉伸强度。据表明，这些实验基台牙齿形式在临床上很有用，有必要选择适合每种基台形式的修复材料。