Fatigue testing of enamel bonds with self-etch and total-etch adhesive systems
Fatigue testing of enamel bonds with self-etch and total-etch adhesive systems
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DOI：
10.1016/j.dental.2005.11.021
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发表时间：
2006-11-01
期刊：
影响因子：
5
通讯作者：
Feilzer, Albert J.
中科院分区：
文献类型：
--
作者：
Erickson, Robert L.;De Gee, Anton J.;Feilzer, Albert J.
Objective.用自酸蚀粘合剂体系对釉质的腐蚀不如用磷酸对大多数全酸蚀粘合剂体系的腐蚀那么明显。这可能会导致两种系统的债券效力不同。本研究的目的是通过粘结强度和疲劳测试比较两种这样的系统。材料和方法。在牛牙釉质表面上获得了Single Bond（SB）和Adper Bett-L-Pop（PLP）的剪切粘结强度。使用相同的测试夹具，使用2 Hz的循环载荷进行疲劳测量，最多进行10（5）次循环或直至粘合失效。对于每种粘合剂，在剪切粘合强度的40%和70%之间测试四个选定的载荷，并记录失效循环次数。根据试验数据建立了S-N曲线，并确定了疲劳极限。使用Mann-Whitney U检验和t检验对结果进行统计学比较。对牙釉质表面树脂标记形成的SEM分析进行了研究。SB（25.3 MPa）的粘结强度显著高于PLP（19.2 MPa）。10（5）次载荷循环后的可持续应力显著低于相应的剪切粘结强度，PLP和SB的疲劳极限分别为8.4 MPa和14.6 MPa。PLP的疲劳极限与粘结强度之比（44%）小于SB（57%）。PLP组树脂标记渗入牙釉质的程度明显低于SB组。结合粘结强度测试的疲劳测试可以提供用于评估用于粘结到釉质的粘合剂系统的性能的更好的手段。(C)2005年牙科材料学院。由爱思唯尔有限公司出版。保留所有权利。
Objective. Etching of enamel by self-etching adhesive systems is not as pronounced as with phosphoric acid employed with most total-etch adhesive systems. This may result in differences in the effectiveness of the bonds for the two types of systems. The aim of this study was to compare two such systems by bond strength and fatigue testing.Materials and methods. Shear bond strengths for Single Bond (SB) and Adper Prompt-L-Pop (PLP) were obtained on bovine enamel surfaces. Fatigue measurements were made with the same test fixtures using cyclical loading at 2 Hz for a maximum of 10(5) cycles or until the bond failed. Four selected loads between 40 and 70% of the shear bond strength were tested for each adhesive and the number of cycles to failure was recorded. S-N curves were constructed from the data and fatigue stress limits were determined. The Mann-Whitney U-test and t-tests were used for statistical comparisons of the results. SEM analysis of resin tag formation into enamel surfaces was carried out.Results. A significantly greater bond strength was found for SB (25.3 MPa) than for PLP (19.2). Sustainable stresses after 10(5) load cycles were substantially lower than the corresponding shear bond strengths and fatigue limits were found to be 8.4 MPa for PLP and 14.6 MPa for SB. The ratio of fatigue limit to bond strength was less for PLP (44%) than for SB (57%). Resin tag penetration into enamel was substantially less for PLP than for SB.Significance. Fatigue testing in conjunction with bond strength testing can provide a better means for assessing the performance of adhesive systems used for bonding to enamel. (C) 2005 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.