A 2-year evaluation of moisture on microtensile bond strength and nanoleakage
A 2-year evaluation of moisture on microtensile bond strength and nanoleakage
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DOI：
10.1016/j.dental.2006.05.005
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发表时间：
2007-07-01
期刊：
影响因子：
5
通讯作者：
Loguerico, A. D.
中科院分区：
文献类型：
--
作者：
Reis, A.;Grande, R. H. M.;Loguerico, A. D.
目标.本研究评价了水分对三种粘结系统（Single Bond、One-Step和Syntac Single Component）在粘结后不久（IM）和水储存2年（2年）后的树脂-牙本质R-粘结强度（BS）和硝酸银吸收（SNU）的影响。将牙本质表面粘结在干燥（D）、潮湿（W）或过湿表面（OW）上。在构建好样品后，将样品储存在水中（37 ℃/24 h）。制备树脂-牙本质棒（0.8 mm（2）），并将其分为即刻（IM）和2年储存（2 Y）试验。在0.5 mm/min的张力下测试来自每个时间段的一半试样，并且将另一半浸入硝酸银中并通过SEM-EDX检查。资料以三因子重复测量变异数分析及Tukey检定（α = 0.05）进行分析。IM组在W条件下的总BS（MPa）高于D和OW组。2 Y后，W组的BS低于IM组，但OS和SB高于D组和OW组。IM组在D、W和OW下的总体硝酸银沉积（%）相似。在2 Y组中，纳米渗漏高于IM组，然而在W条件下增加不太明显。更高的BS和显着降低硝酸盐的吸收，观察IM组，OS和SB。在W条件下，BS随时间的推移减少不太明显，发生硝酸盐吸收较少。(C)2006年，牙科材料学院。由爱思唯尔有限公司出版。保留所有权利。
Objectives. This study evaluated the effect of moisture on the resin-dentin R-bond strength (BS) and silver nitrate uptake (SNU) of three adhesive systems (Single Bond, One-Step and Syntac Single Component) soon after bonding (IM) and after 2 years of water storage (2y).Methods. Dentin surfaces were bonded on a dry (D), moist (W) or over-wet surfaces (OW). After restorations were constructed, specimens were stored in water (37 degrees C/24 h). Resin-dentin sticks were prepared (0.8 mm(2)) and they were divided for immediate (IM) and 2-year storage (2Y) testing. Half of the specimens from each period of time were tested in tension at 0.5 mm/min and the other half was immersed in silver nitrate and examined by SEM-EDX. The data was analyzed by three-way repeated measures ANOVA and Tukey's tests (alpha = 0.05).Results. The overall BS (MPa) in the IM group under W condition was higher than in D and OW groups. After 2Y, the BS in W was lower than in the IM group, however higher than in the D and OW for OS and SB. The overall silver nitrate deposition (%) in the IM group under D, W and OW were similar. In the 2Y groups, the nanoleakage was higher than IM groups, however the increase was less pronounced in the W condition.Significance. Higher BS and a significantly lower nitrate uptake were observed for IM groups, for OS and SB. Under W conditions, the BS reduction over time was less pronounced and less nitrate uptake occurred. (C) 2006 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.