Relationship between mechanical properties of one-step self-etch adhesives and water sorption
Relationship between mechanical properties of one-step self-etch adhesives and water sorption
复制标题
DOI：
10.1016/j.dental.2009.12.007
复制
发表时间：
2010-04-01
期刊：
影响因子：
5
通讯作者：
Pashley, David H.
中科院分区：
文献类型：
--
作者：
Hosaka, Keiichi;Nakajima, Masatoshi;Pashley, David H.
目标。本研究的目的是评价一步自蚀刻胶粘剂的弹性模量和极限抗拉强度的变化与其吸水程度的关系。使用五种一步自蚀蚀粘合剂，Xeno IV (Dentsply Caulk), G Bond (GC Corp.), Clearfil S3 Bond (Kuraray Medical Inc.), Bond Force （Tokuyama Dental Corp.）和One-Up Bond F Plus （Tokuyama Dental Corp.）。每种胶粘剂采用10个哑铃状聚合物，通过三点弯曲试验获得弹性模量，通过微拉伸试验获得极限抗拉强度。在水中浸泡24小时之前和之后，分别在干湿条件下测量弹性模量和极限抗拉强度。采用ISO-4049标准的修改版测量吸水率。弹性模量和极限抗拉强度的每个结果采用双向方差分析进行统计分析，吸水率的结果采用单向方差分析进行统计分析。用回归分析确定了干、湿状态下的弹性模量与极限抗拉强度之间的相关性，以及浸水前后与吸水前后这些性能的下降百分比。在干燥状态下，5种粘结聚合物的弹性模量变化在948 ~ 1530 MPa之间，极限抗拉强度变化在24.4 ~ 61.5 MPa之间。湿态试样的弹性模量（584 ~ 1073 MPa）和极限抗拉强度（16.5 ~ 35.0 MPa）较低。吸水率从32.1到105.8 g mm不等（-3）。储水后胶粘剂的弹性模量和极限抗拉强度显著下降。吸水性取决于胶粘剂体系的成分。胶粘剂的极限抗拉强度下降百分比与吸水率有关，而弹性模量下降百分比与吸水率无关。(C) 2009年牙科材料学会。Elsevier Ltd.出版。版权所有。
Objectives. The purpose of this study was to evaluate the relationship between changes in the modulus of elasticity and ultimate tensile strength of one-step self-etch adhesives, and their degree of water sorption.Methods. Five one-step self-etch adhesives, Xeno IV ( Dentsply Caulk), G Bond ( GC Corp.), Clearfil S3 Bond (Kuraray Medical Inc.), Bond Force (Tokuyama Dental Corp.), and One-Up Bond F Plus ( Tokuyama Dental Corp.) were used. Ten dumbelled-shaped polymers of each adhesive were used to obtain the modulus of elasticity by the three-point flexural bending test and the ultimate tensile strength by microtensile testing. The modulus of elasticity and the ultimate tensile strength were measured in both dry and wet conditions before/after immersion in water for 24 h. Water sorption was measured, using a modification of the ISO-4049 standard. Each result of the modulus of elasticity and ultimate tensile strength was statistically analyzed using a two-way ANOVA and the result of water sorption was statistically analyzed using a one-way ANOVA. Regression analyses were used to determine the correlations between the modulus of elasticity and the ultimate tensile strength in dry or wet states, and also the percent decrease in these properties before/after immersion of water vs. water sorption.Results. In the dry state, the moduli of elasticity of the five adhesive polymers varied from 948 to 1530 MPa, while the ultimate tensile strengths varied from 24.4 to 61.5 MPa. The wet specimens gave much lower moduli of elasticity ( from 584 to 1073 MPa) and ultimate tensile strengths ( from 16.5 to 35.0 MPa). Water sorption varied from 32.1 to 105.8 g mm(-3).Significance. The moduli of elasticity and ultimate tensile strengths of the adhesives fell significantly after water-storage. Water sorption depended on the constituents of the adhesive systems. The percent decreases in the ultimate tensile strengths of the adhesives were related to water sorption, while the percent reductions in the moduli of elasticity of the adhesives were not related to water sorption. (C) 2009 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.