Effect of remaining dentin thickness and the use of conditioner on microtensile bond strength of a glass-ionomer adhesive

被引:72
|
作者
Inoue, S
Van Meerbeek, B
Abe, Y
Yoshida, Y
Lambrechts, P
Vanherle, G
Sano, H
机构
[1] Katholieke Univ Leuven, Sch Dent Oral Pathol & Maxillofacial Surg, Dept Conservat Dent, Leuven BIOMAT Res Ctr, B-3000 Leuven, Belgium
[2] Hokkaido Univ, Sch Dent Med, Dept Oral Hlth Sci, Sapporo, Hokkaido 060, Japan
[3] Hiroshima Univ, Fac Dent, Dept REmovable Prosthodont, Hiroshima 730, Japan
[4] Hiroshima Univ, Fac Dent, Dept Biomat Sci, Hiroshima 730, Japan
关键词
glass-ionomer adhesive; micro-tensile bond strength; remaining dentin thickness; polyalkenoic acid conditioner; dentin;
D O I
10.1016/S0109-5641(01)00003-3
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
Objectives: The purpose of this study is to investigate the effect of remaining dentin thickness and the use of a 20% polyalkenoic acid conditioner on the micro-tensile bond strength of a glass-ionomer adhesive to dentin. Methods: Resin composite was bonded to flat dentin surfaces from 14 extracted human teeth using Fuji BOND LC (GQ with or without a polyalkenoic acid conditioner, then sectioned to thin slabs, trimmed into an hourglass shape with the area of the interface being approximately 1 mm(2), and subjected to micro-tensile testing at a cross-head speed of 1 mm/min. Micro-tensile bond strengths were determined at three depth levels with a remaining dentin thickness of more than 3 mm, between 2 and 3 mm, and less than 2 mm. Failure modes of the broken interfaces were determined using field-emission scanning electron microscopy. Results: The micro-tensile bond strength to dentin significantly improved when the remaining dentin thickness increased and the conditioner was used. When the conditioner was used (irrespective of remaining dentin thickness), failures mainly occurred adhesively at the interface between the adhesive and resin composite. When no conditioner was used, no adhesive failures between the adhesive and resin composite occurred, but failures occurred mainly adhesively between dentin and the adhesive, or mixed adhesive-cohesively. Significance: The bonding effectiveness of the glass-ionomer adhesive tested was affected by the area of intertubular dentin available for micro-mechanical retention through hybrid-layer formation. Removal of the smear layer improved the bond strength of the adhesive to dentin. (C) 2001 Academy of Dental Materials. Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:445 / 455
页数:11
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