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Development on mechanical evaluation system of resin-bonded partial denture of which abutment tooth model sways

基牙模型晃动树脂粘接局部义齿力学评价系统的研制

基本信息

批准号：
10671823
负责人：
NAGAI Mashiro
金额：
$ 2.05万
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 Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10671823/
关键词：
resin-bonded partial denture adhesive resin adhesive strength fracture toughness double cantilever beam (DCB) test durability thermal-cycling test DCB test under repeated constant displacement 破壞靱性値衝撃せん断接着強さ衝撃方向破壊靱性値

项目摘要

A design of retainer of a resin-bonded partial denture is depended on mechanical properties. This study examined tensile adhesive strength, fracture toughness (double cantilever beam (DCB) test) and durability (4/60-degree C thermal-cycling test (5000 cycles) and DCB test under repeated constant displacement) on five commercially available adhesive resins (SB,SBO,PV,BR and ID). The major findings were as follows. When classified roughly in-group of SB without filler and group of PV, BR and ID with filler, that adhesive strength was almost similar. However, a value of fracture toughness of SB showed more than ten times of value of PV, BR and ID, and a considerable difference was recognized. Thus, the fracture toughness is greatly influenced filler content. About adhesive strength after thermal cycling test, the value of SB decreased comparing with their values of SBO, PV and BR.About fracture toughness after thermal-cycling test, the value of SB considerably decreased comparing with their values pf PV, BR and ID to decrease inconsiderably, and the fracture mode changed into interfacial fracture from cohesive fracture. Thus, it was found that adhesive strength and fracture toughness differed physically in mechanical property. In DCB test under repeated constant displacement, a value of crack propagating rate of PV was considerably larger than that of SB.Accordingly, for abutment tooth swaying comparatively, an adhesive resin with filler was not pleasing. From these fundamental testing results, in a long-term life design of resin-bonded partial denture, it was suggested that selection of adhesive resin with filler was not desirable. Therefore, on the basis of these mechanical properties of adhesive resin, it was important to select an adhesive resin to be reasonable to a resin-bonded partial denture.

树脂粘结义齿固位体的设计取决于其力学性能。本研究检查了5种市售粘合剂树脂（SB、SBO、PV、BR和ID）的拉伸粘合强度、断裂韧性（双悬臂梁（DCB）试验）和耐久性（4/60 ℃热循环试验（5000次循环）和DCB重复恒定位移试验）。主要调查结果如下。当粗略地分为SB无填料组和PV、BR和ID有填料组时，粘合强度几乎相似。然而，SB的断裂韧性值显示出PV、BR和ID值的十倍以上，并且认识到相当大的差异。因此，断裂韧性很大程度上受填料含量的影响。在粘接强度方面，热循环后SB值较SBO、PV和BR值有所下降;在断裂韧性方面，热循环后SB值较PV、BR和ID值有较大幅度下降，但下降幅度不大，断裂方式由内聚断裂转变为界面断裂。因此，发现粘合强度和断裂韧性在物理上在机械性能上不同。在DCB试验中，在重复恒定位移下，PV的裂纹扩展速率值明显大于SB。因此，对于基牙相对摆动，带填料的粘合树脂是不令人满意的。从这些基本的测试结果，在树脂粘结局部义齿的长期寿命设计，这是建议，选择粘接树脂与填料是不可取的。因此，根据粘结树脂的力学性能，合理地选择粘结树脂对树脂粘结义齿的修复是非常重要的。