Immediate versus water-storage performance of Class V flowable composite restoratives
Immediate versus water-storage performance of Class V flowable composite restoratives
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DOI：
10.1016/j.dental.2006.06.001
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发表时间：
2006-09-01
期刊：
影响因子：
5
通讯作者：
Watts, David C.
中科院分区：
文献类型：
--
作者：
Irie, Masao;Hatanaka, Kenji;Watts, David C.
目标。本研究的目的是阐明24小时的储水和整理时间对8种现代流动树脂复合体的力学性能和V类空洞边缘适合性的影响。对8个流动复合材料和2个对照(一个微填充和一个混杂复合材料)进行了研究，每个性能的试件分组(n=10)。主要的一系列实验是在V类模型空腔中进行的，界面抛光可以在固化后立即(3min)进行，也可以在储水24小时后进行。修复体完成后，将每颗牙在颊舌侧沿修复体中心切开，沿修复体界面沿14个点(每组10个；共测量140个点)测量(每个洞相隔0.5min)有无边缘间隙(每个洞有无)。水保存3分钟和24小时后，分别测定牙釉质和牙本质的剪切粘结强度、弯曲强度和弹性模量。对于所有可流动的复合材料，在固化后立即抛光，观察到14-30个总和间隙(对照组：和42)。对于24小时后抛光的样品，显著(p0.05)的总间隙数量(11-17)(对照：28和22)。保存24小时后，除Silux Plus外，其余材料与牙釉质和牙本质的剪切粘结强度、弯曲强度和弹性模量均显著增加(P<；0.001)。24小时的后固化间隔可提高流动牙科复合材料的力学性能和粘接性能。在少数情况下，边际缺口形成的发生率也有所降低。然而，后一种效果可能部分归因于延迟24小时抛光，尽管这种延迟不是通常的临床实践。(C)2006年牙科材料学会。爱思唯尔有限公司出版。保留所有权利。
Objectives. The aims of this investigation were to clarify the effects of 24 h water-storage and finishing time on mechanical properties and marginal adaptation to a Class V cavity of eight modern flowable resin-composites.Methods. Eight flowable composites, plus two controls (one microfilled and one hybrid composite), were investigated with specimen sub-groups (n = 10) for each property measured. The principal series of experiments was conducted in model Class V cavities with interfacial polishing either immediately (3 min) after setting or after 24 h water-storage. After the finishing procedure, each tooth was sectioned in a buccolingual direction through the center of the restoration, and the presence or absence of marginal-gaps was measured (and then summed for each cavity) at 14 points'(each 0.5 min apart) along the cavity restoration interface (n = 10 per group; total points measured = 140). The shear bond-strengths to enamel and to dentin, and flexural strengths and moduli data were also measured at 3 min and after 24 h water-storage.Results. For all flowable composites, polished immediately after setting, 14-30 summed gaps were observed (controls: 64 and 42). For specimens polished after 24 h, a significantly (p 0.05) numbers (11-17) of summed gaps (controls: 28 and 22). After 24 h storage, shear bond-strengths to enamel and to dentin, flexural strengths and moduli increased highly significantly (P < 0.001) for all materials, except Silux Plus.Significance. A post-cure interval of 24 h resulted in enhanced mechanical and adhesive properties of flowable dental composites. In a minority of cases there was also a reduced incidence of marginal-gap formation. However the latter effect may be partly attributed to 24 h delayed polishing, even though such a delay is not usual clinical practice. (C) 2006 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.