Sealing performance of resin cements before and after thermal cycling: Evaluation by optical coherence tomography
Sealing performance of resin cements before and after thermal cycling: Evaluation by optical coherence tomography
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DOI：
10.1016/j.dental.2014.05.010
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发表时间：
2014-09-01
期刊：
影响因子：
5
通讯作者：
Tagami, Junji
中科院分区：
文献类型：
--
作者：
Turkistani, Alaa;Sadr, Alireza;Tagami, Junji
目标。自粘树脂水泥是近年来引进的；然而，关于它们长期表现的数据很少。在体外实验中，采用1310 nm中心波长扫描源光学相干断层扫描（OCT）监测间接树脂修复体在热循环后的适应性。采用三种树脂粘结剂将树脂嵌体植入拔牙后的i类牙槽；Clearfil SA Luting (SA; Kuraray)， Bistite II DC或Multibond II （Tokuyama Dental）。每一种骨水泥都使用自蚀刻粘合剂（Clearfil SE Bond）和低粘度微填充树脂对牙本质进行预涂或不涂。分别在24小时、2000年和10000次热循环后（n = 5）进行OCT成像。选取样品切片，用激光共聚焦扫描显微镜观察界面。通过软件对每个标本的20次b扫描进行地板适应性（百分比）分析，并采用三向方差分析（ANOVA）进行统计学分析，显著性水平为0.05。树脂水泥类型、树脂涂层和热老化均显著影响其适应性（p < 0.05）。最初，SA表现出最高的适应性；热老化对其密封性能影响较大。当采用树脂涂层技术时，所有胶结物的最佳效果都是一致的，在涂层组中没有观察到界面完整性的恶化。CLSM完全证实了各组OCT的表现。OCT可用于监测具有多个界面树脂层的复合嵌体。直接粘结剂在树脂包覆技术中的应用提高了所有树脂水泥的界面密封性和耐久性。(C) 2014年牙科材料学会。Elsevier Ltd.出版。版权所有。
Objectives. Self-adhesive resin cements have been recently introduced; however, there is little data available on their long-term performance. In this in vitro study, swept-source optical coherence tomography (OCT) at 1310 nm center wavelength was used for monitoring adaptation of indirect resin restorations after thermal cycling.Methods. Resin inlays were luted to class-I cavities of extracted human teeth using three resin cements; Clearfil SA Luting (SA; Kuraray), Bistite II DC or Multibond II (Tokuyama Dental). Each cement was applied with or without pre-coating of dentin by a self-etch adhesive (Clearfil SE Bond) and a low-viscosity microfilled resin. OCT imaging was performed after 24 h, after 2000 and after 10,000 thermocycles (n = 5). Selected samples were sectioned for interfacial observation by confocal laser scanning microscope (CLSM). Floor adaptation (percentage) was analyzed by software on 20 B-scans throughout each specimen, and subjected to statistical analysis by three-way ANOVA test at a significance level of 0.05.Results. Resin cement type, resin coating and thermal aging all significantly affected adaptation (p < 0.05). Initially, SA showed the highest adaptation; however, thermal aging significantly affected its sealing. The best results for all the cements were consistently achieved when the resin coating technique was applied where no deterioration of interfacial integrity was observed in the coated groups. CLSM closely confirmed OCT findings in all groups.Signcance. OCT could be used for monitoring of composite inlays with several interfacial resin layers. The application of a direct bonding agent in the resin-coating technique improved interfacial sealing and durability of all resin cements. (C) 2014 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.