Effect of dentin pretreatment with mild acidic HOCl solution on microtensile bond strength and surface pH
Effect of dentin pretreatment with mild acidic HOCl solution on microtensile bond strength and surface pH
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DOI：
10.1016/j.jdent.2009.11.006
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发表时间：
2010-03-01
影响因子：
4.4
通讯作者：
Tagami, Junji
中科院分区：
文献类型：
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作者：
Kunawarote, Sitthikorn;Nakajima, Masatoshi;Tagami, Junji
目的：评价弱酸性HOCl溶液预处理对两步自酸蚀粘接剂与牙本质微拉伸粘接强度（mu TBS）的影响以及牙本质表面pH值的改变。将39个牙本质标本分为对照组和12个实验组，分别用6%NaOCl和50，100和200 ppm HOCl（Comfosy（R））溶液5、15和30 s。在用流动水冲洗30秒后，根据制造商的说明书用Clearfil SE Bond粘结所有牙本质表面。在24小时的水储存后，将粘合的样品切片并修剪成沙漏形状，横截面积约为1.0 mm（2），然后进行mu TBS测试。36个中冠牙本质盘用于表面pH测量。使用pH成像显微镜（SCHEM-100）检查有或没有预处理的牙本质表面pH。对mu TBS数据进行单因素方差分析（Dunnett’s T3）和表面pH数据通过非参数统计进行分析（Mann-Whitney U检验）。与对照组相比，无论施用时间如何，用浓度为50、100和200 ppm的Comfosy预处理对mu TBS没有显著影响，然而，100和200 ppm组显示出显著较低的表面pH值。对于NaOCl预处理组，与对照组相比，较长的应用时间显著降低了mu TBS并增加了表面pH值。结论：50 ppm Comfosy（R）预处理5，15和30 s不会影响两步自蚀刻粘合剂对牙本质和牙本质表面pH的mu TBS。（c）2009 Elsevier Ltd.保留所有权利。
Objectives: To evaluate the pretreatment effect of mild acidic HOCl solution on the microtensile bond strength (mu TBS) of a two-step self-etch adhesive to dentin and the alteration of dentin surface pH.Methods: Thirty-nine flat ground coronal dentin specimens were divided into one control group and 12 experimental groups, which were treated with 6% NaOCl or 50, 100 and 200 ppm HOCl (Comfosy (R)) solutions for 5, 15 and 30 s. After rinsing with running water for 30 s, all the dentin surfaces were bonded with Clearfil SE Bond according to the manufacturer's instructions. After 24 h water storage, the bonded specimens were sectioned and trimmed to an hourglass shape with a cross-sectional area of approximately 1.0 mm(2) and then subjected to the mu TBS test. Thirty-six mid-coronal dentin discs were used for surface pH measurement. Dentin surface pH with or without pretreatment was examined using a pH-imaging microscope (SCHEM-100). The mu TBS data were analyzed by one-way ANOVA (Dunnett's T3) and the surface pH data were analyzed by non-parametric statistics (Mann-Whitney U-test).Results: Pretreatment with Comfosy (R) at concentrations of 50, 100 and 200 ppm did not significantly affect mu TBS regardless of the application time compared with the control group, however the 100 and 200 ppm Comfosy (R) groups showed significantly lower surface pH values. For the NaOCl pretreatment groups, a longer application time significantly decreased the mu TBS and increased the surface pH values compared to the control group.Conclusions: The 50 ppm Comfosy (R) pretreatments for 5, 15 and 30 s did not affect the mu TBS of the two-step self-etch adhesive to dentin and dentin surface pH. (c) 2009 Elsevier Ltd. All rights reserved.