Concurrent evaluation of composite internal adaptation and bond strength in a class-I cavity
Concurrent evaluation of composite internal adaptation and bond strength in a class-I cavity
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DOI：
10.1016/j.jdent.2012.10.003
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发表时间：
2013-01-01
影响因子：
4.4
通讯作者：
Sumi, Yasunori
中科院分区：
文献类型：
--
作者：
Bakhsh, Turki A.;Sadr, Alireza;Sumi, Yasunori
目的：本研究通过扫描源光学相干断层扫描（OCT）结合不同填充方法的微拉伸键合强度（MTBS）研究i类空腔底适应。方法：两种胶粘剂体系；Tokuyama Bond Force和Tri-S Bond Plus与通用复合材料（Estelite Sigma Quick）一起使用，可以增量（斜向）放置，也可以批量放置，有或没有流动复合材料衬里（Palfique Estelite LV）。通过OCT获得10张连续b扫描图像（中心波长：1319 nm）。为了评价无间隙空腔底板百分比的适应性，将信号强度的显著增加视为空腔底板粘结界面处的间隙。然后将相同的试件切割成梁，以测量空腔底部的MTBS。结果：双因素方差分析表明，粘接剂系统和填充技术的相互作用显著影响了适应和MTBS （p < 0.05）。MTBS与洞底适应性呈显著相关（p < 0.05）。采用增量充填技术可以提高空腔底板适应性和MTBS，而衬砌技术的效果则存在差异。结论：利用OCT进行定量评估可以为口腔复合材料和修复技术的性能和有效性提供非破坏性的信息。在ⅰ类孔洞中，底板适应性与粘结强度之间存在中等相关性。复合修复的增量应用在粘结强度和内部适应性方面表现出最好的效果。临床意义：从粘接强度和内适应角度来看，复合修复的增量应用是最有利的放置技术。流动复合材料缺乏放置压力可能会影响其对一体化胶粘剂的适应；因此，可流动复合材料的空腔衬砌效果是可变的。(C) 2012 Elsevier Ltd.版权所有。
Objectives: This study investigated class-I cavity floor adaptation by swept-source optical coherence tomography (OCT) in combination with microtensile bond strength (MTBS) using different fillingmethods. Methods: Two adhesive systems; Tokuyama Bond Force and Tri-S Bond Plus were used in conjunction with a universal composite (Estelite Sigma Quick) placed either incrementally (oblique) or in bulk with or without a flowable composite lining (Palfique Estelite LV). Ten serial B-scan images were obtained throughout each cavity by OCT (center wavelength: 1319 nm). In order to evaluate adaptation defined as the cavity floor percentage showing no gap, a significant increase in the signal intensity was considered as gap at the bonded interface of the cavity floor. The same specimens were then cut into beams to measure MTBS at the cavity floor.Results: Two-way ANOVA demonstrated that the interaction of adhesive systems and filling techniques was significantly affecting both adaptation and MTBS (p < 0.05). There was a significant correlation between MTBS and adaptation at cavity floor (p < 0.05). Cavity floor adaptation and MTBS were improved when incremental filling technique was applied, while the outcome of lining technique was variable.Conclusions: Quantitative assessment by OCT can non-destructively provide information on the performance and effectiveness of dental composites and restoration techniques. There was a moderate correlation between floor adaptation and bond strength in class-I cavities. Incremental application of composite restoration showed the best performance in terms of bond strength and internal adaptation.Clinical significance: Incremental application of composite restoration was the most advantageous placement technique in terms of bond strength and internal adaptation. The lack of placement pressure with flowable composites may affect their adaptation to all-in-one adhesives; therefore, the outcome of cavity lining by flowable composite was variable. (C) 2012 Elsevier Ltd. All rights reserved.