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.

对于聚合收缩间隙的形成，光固化后粘合树脂的机械性能似乎很重要。本研究的目的是评估三种自蚀刻体系中粘接树脂在光固化5分钟后的纳米硬度（H）、弹性模量（E）和微拉伸强度（MTS）。H和E的值使用纳米压痕测试仪测量照射10秒后5分钟和24小时（作为对照）对粘合树脂的影响。还测量了材料在 5 分钟和 24 小时时的 MTS。双向方差分析证实，与 5 分钟时相比，24 小时时所有三种机械性能均显着增加 (p<0.05)。对于材料而言，不同材料的机械性能值也有所不同。不同材料中观察到的机械性能的变化可能是由于它们的单体体系、引发剂体系、稳定剂、填料和偶联剂的差异所致。在相同的材料中，5 分钟和 24 小时的机械性能之间的差异可能是由于转换程度造成的。可能希望光固化修复剂之前的粘合树脂的拉伸强度足够大以与聚合收缩应力竞争。另一方面，考虑到粘合层作为应力破坏器的功能，粘合树脂的弹性模量不应该太大。因为粘合树脂的机械性能可能会受到底漆混合物、牙本质上的水等的影响。因此，进一步的研究应集中于粘合系统的粘合性能与树脂-牙本质界面粘合层的机械性能之间的关系。