Effects of mechanical properties of adhesive resins on bond strength to dentin
Effects of mechanical properties of adhesive resins on bond strength to dentin
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DOI：
10.1016/s0109-5641(01)00046-x
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发表时间：
2002-05-01
期刊：
影响因子：
5
通讯作者：
Sano, H
中科院分区：
文献类型：
--
作者：
Takahashi, A;Sato, Y;Sano, H
目的：探讨牙本质微拉伸强度与固化粘接树脂力学性能之间的关系。方法：用4种商用自酸蚀预涂系统(Clearfe SE Bond、联黎Bond、Tokuso Mac-Bond II和Imperva Fluoro Bond)粘接拔除的人牙本质冠表面，并用树脂复合体粘接。在37℃的水中储存24小时后，将粘结试件修剪并以1 mm/min的十字头速度进行微拉伸粘结强度测试。剥离表面用有限元扫描电子显微镜观察。为了测试力学性能，制备了0.7 mm厚的胶粘剂树脂板材，光固化，在室温下干燥放置24小时。修剪后，测量极限微拉伸强度。结果：树脂与牙本质的微拉伸粘结强度和极限微拉伸强度在各系统间无显著差异(P>；0.05)。然而，Clearfi SE Bond和Imperva Fluoro Bond粘接树脂的纳米硬度和杨氏弹性系数显著高于联黎Bond和Tokuso Mae-Bond II树脂(P<；0.05)。微拉伸粘结强度与树脂的极限微拉伸强度显著相关(r(2)=0.77；P<；0.05)，而与纳米硬度和杨氏模数无相关性(P>；0.05)。对脱粘表面的扫描电子显微镜观察显示，粘接树脂内部存在界面和粘结破坏的混合型断口。意义：四种自酸蚀预涂系统显示出相似的牙本质粘结强度，这也与粘接树脂的极限强度相关。(C)2002年牙科材料学会。爱思唯尔科学有限公司出版。版权所有。
Objectives: The purpose of this study was to evaluate the relationship between the micro-tensile bond strength to dentin and mechanical properties of the cured adhesive resins.Methods: Coronal dentin surfaces of extracted human teeth were treated with four commercial self-etching priming systems (Clearfil SE Bond; UniFil Bond; Tokuso Mac-Bond II; and Imperva Fluoro Bond) and bonded with a resin composite. After 24 h storage in water at 37degreesC, the bonded specimens were trimmed and subjected to micro-tensile bond strength testing at a cross-head speed of 1 mm/min. Debonded surfaces were observed under a FE-SEM. For testing mechanical properties, 0.7-mm thick slabs of each adhesive resin were prepared, light-cured, and stored dry at the room temperature for 24 h. After trimming, ultimate micro-tensile strength was measured. The nano-hardness and Young's modulus were also evaluated using cured adhesives that were prepared in the same manner as described above.Results: The micro-tensile bond strengths to dentin and ultimate micro-tensile strengths of the resins were not significantly different among all systems (P > 0.05). However, the nano-hardness and Young's modulus of Clearfil SE Bond and Imperva Fluoro Bond adhesive resins were significantly higher than those of UniFil Bond and Tokuso Mae-Bond II resins (P < 0.05). The micro-tensile bond strength significantly correlated with the ultimate micro-tensile strength of the resins (r(2) = 0.77; P < 0.05), but was not correlated with the nano-hardness or Young's modulus (P > 0.05). SEM observation of the debonded surfaces revealed a mixed type of fracture with a combination of interfacial and cohesive failure within the adhesive resin.Significance: The four self-etching priming systems exhibited similar dentin bond strengths, which also correlates with the ultimate strength of the adhesive resins. (C) 2002 Academy of Dental Materials. Published by Elsevier Science Ltd. All rights reserved.