Effect of bonding resin strength on contraction gap formation

粘接树脂强度对收缩间隙形成的影响

基本信息

批准号：
13671993
负责人：
IKEDA Takatsumi
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：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13671993/
关键词：
Bonding resin Contraction gap Nano-hardness elastic modulus microtensile strength adhesive resin micro-tensile test contraction gap micro-tensile strength

项目摘要

Regarding with polymerizing contraction gap formation, mechanical properties of bonding resins immediately after light-curing seems to be important. The purpose of this study was to evaluate nano-hardness(H), elastic modulus(E) and microtensile strength(MTS) of bonding resins in three self-etching systems at 5minutes after light-curing the materials.The values of H and E at 5 minutes and 24 hours (as a control) after the 10 second irradiation for bonding resins were measured using a nano-indentation tester. MTSs of the materials at 5 minutes and 24 hours were also measured.Two-way ANOVA confirmed a significant increase in all the three mechanical properties at 24 hours compared with those at 5 minutes (p<0.05). As for the materials, the values of the mechanical properties were also varied among the materials.The variation of the mechanical properties observed in the different materials might be explained by differences in their monomer system, initiator system, stabilizer, filler and coupling agent. Within the same material, the difference between the mechanical properties at 5 minutes and at 24 hours might be due to a degree of conversion. It may be desirable that the tensile strengths of the bonding resins just before light-curing restoratives are large enough to compete with polymerizing contraction stresses. On the other hand, the elastic modulus of the bonding resins should not be so large considering the function of the adhesive layer as a stress breaker.As the mechanical properties of the bonding resins might be affected by mixture of primer, water on dentin and so on, further studies should focus on a relationship between bonding performance of the adhesive systems and the mechanical properties of adhesive layers at the resin-dentin interface.

关于聚合的收缩间隙形成，固定后立即粘结树脂的机械性能似乎很重要。这项研究的目的是评估纳米硬度（H），弹性模量（E）和粘合物在三个自我蚀刻系统中的粘结物树脂的微封闭强度（MTS）在光线固定后的材料后5分钟，在5分钟后的材料后5分钟（在5分钟（作为对照）的h和e）值进行粘合物的10次插入后使用Nanano-Indentation-Indentation-Indentation-Indentation-Indentation-nanano-Indentation-Inseartians（作为对照）。还测量了5分钟24小时的MTSS材料。与5分钟相比，两次ANOVA在24小时时证实了所有三种机械性能的所有三种机械性能显着增加（p <0.05）。至于材料，机械性能的值在材料之间也有所不同。在不同材料中观察到的机械性能的变化可能是通过其单体系统，引发剂系统，稳定器，填充剂和耦合剂的差异来解释的。在同一材料中，在5分钟和24小时时机械性能之间的差异可能是由于一定程度的转换造成的。在固定恢复效应足够大之前，粘合树脂的拉伸强度可能是可以理想的。另一方面，考虑到粘合层的功能，粘合树脂的弹性模量不应如此之大。由于粘合树脂的机械性能可能会受到底漆的混合，牙本质上的水等的影响，因此，进一步的研究应集中在粘合系统的键合性能之间的关系上，粘合层的粘合层和粘附力的固定层之间的关系。