Adverse surface interactions between one-bottle light-cured adhesives and chemical-cured composites

被引:220
作者
Sanares, AME
Itthagarun, A
King, NM
Tay, FR
Pashley, DH
机构
[1] Univ Hong Kong, Fac Dent, Hong Kong, Hong Kong, Peoples R China
[2] Med Coll Georgia, Sch Dent, Dept Oral Biol & Maxillofacial Pathol, Augusta, GA 30912 USA
关键词
one-bottle adhesives; chemical-cured composites; light-cured composites; acidity; microtensile bond strength; SEM;
D O I
10.1016/S0109-5641(01)00016-1
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
Objectives: This study examined the effect of one-bottle adhesives with different acidities on bonding to chemical-cured and light-cured resin composites. Methods: Twenty-four non-carious human third molars were divided into eight groups. A flat dentin surface was created for each tooth. Acid-conditioned dentin surfaces were bonded with Prime&Bond NT (Dentsply), OptiBond SOLO (Kerr), Single Bond (3M) or One-Step (Bisco). Each adhesive group was covered with composite buildups, using either a light-cured (Z100, 3M) or a chemical-cured composite (BisFil 2, Bisco). Specimens were vertically sectioned into 0.9 X 0.9 mm beams. Microtensile bond strengths were recorded and failure modes were classified using a stereoscopical microscope. Four representative beams from each group were further prepared for SEM examination. Results: Two-way ANOVA showed that the effect of adhesive types, composite curing modes and their interaction were statistically significant (P < 0.001). Multiple comparison tests revealed no statistically significant difference in the bond strength of the four adhesives with the light-cured composite (P > 0.05). However, they were significantly lower when used with the chemical-cured composite (P < 0.01). A positive correlation was observed between the acidity of adhesives and the bond strengths of the chemical-cured composite. Failure occurred predominantly along the composite-adhesive interface, with microporosities on the adhesive surface and voids within the chemical-cured composite. Significance: Air incorporated during mixing of chemical-cured composites only contributed partially to the decreased bond strength observed in simplified-step adhesives. Ultrastructural observations suggested the presence of a surface interaction between the uncured, acidic resin monomers from the oxygen inhibition layer of the adhesive and the initiator components in the chemical-cured composite. (C) 2001 Academy of Dental Materials. Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:542 / 556
页数:15
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