Effect of antioxidant treatment on bond strength of a luting resin to bleached enamel
Effect of antioxidant treatment on bond strength of a luting resin to bleached enamel
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DOI：
10.1016/j.jdent.2008.05.008
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发表时间：
2008-10-01
影响因子：
4.4
通讯作者：
Kaya, Ayseguel Demirbas
中科院分区：
文献类型：
--
作者：
Gokce, Bulent;Comlekoglu, M. Erhan;Kaya, Ayseguel Demirbas
目的：本研究的目的是比较研究抗氧化剂处理和过氧化脲漂白后延迟粘接对粘接树脂与牙釉质的剪切粘接强度（SBS）的影响。材料和方法：使用低速金刚石锯从新鲜提取的人磨牙制备40个平坦的釉质表面，随机分为三个漂白组（n = 10/组）和对照组（n = 10）。第1组由漂白后立即粘合的样本组成。第2组标本用抗氧化剂10%抗坏血酸钠处理，而第3组标本在漂白后浸泡在人工唾液中1周。第4组中的样本不漂白，但在粘合前浸入人工唾液中1周。制备40个陶瓷块（Empress 2，Ivoclar），并使用双固化树脂粘固剂（Variolink 11，Ivoclar）将其粘接到牙齿上。对试样进行热循环，并使用万能试验机（十字头速度：0.5 mm/min）进行SBS试验。使用扫描电子显微镜对粘结表面进行断裂分析。通过Kruskall-Wallis和Mann-Whitney U检验进行统计分析。而漂白后立即粘合的样品（第1组）显示出显著较低的剪切粘合强度，10%抗坏血酸钠组（第11组）的粘合强度显著高于对照组样本结论：10%抗坏血酸钠可有效逆转骨界面粘结强度的下降，但与对照组相比差异无统计学意义（p > 0.05）。(c)2008爱思唯尔有限公司保留所有权利。
Purpose: The aim of this study was to comparatively investigate the effect of antioxidant treatment and delayed bonding after bleaching with carbamide peroxide on the shear bond strength (SBS) of a luting resin to enamel.Materials and methods: Forty flat enamel surfaces were prepared from freshly extracted human molars using a low speed diamond saw, then divided into three bleaching groups (n = 10/group) and a control group (n = 10). Group 1 consisted of specimens bonded immediately after bleaching. Group 2 specimens were treated with an antioxidant agent, 10% sodium ascorbate, while Group 3 specimens were immersed in artificial saliva for 1 week after bleaching. Specimens in Group 4 were not bleached, but immersed in artificial saliva for 1 week before bonding. Forty ceramic blocks (Empress 2, Ivoclar) were prepared and luted to teeth using a dual-curing resin cement (Variolink 11, Ivoclar). The specimens were thermocycled and the SBS tests were performed using a universal testing machine (cross-head speed: 0.5 mm/min). Fracture analysis of the bonded surfaces was done using a scanning electron microscope. Statistical analysis was carried out by Kruskall-Wallis and Mann-Whitney U-tests.Results: While the samples that were immediately bonded after bleaching (Group 1) demonstrated significantly lower shear bond strengths and 10% sodium ascorbate group (Group 11) demonstrated significantly higher bond strengths than control group samples (p < 0.05), no significant differences were found among delayed bonded group and control group (p > 0.05).Conclusion: Using sodium ascorbate with a concentration of 10% may be reliable for reversing the compromised bond strength. (c) 2008 Elsevier Ltd. All rights reserved.