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首页> 外文期刊>Dental Materials Journal >The effect of the elastic modulus of low-viscosity resins on the microleakage of Class V resin composite restorations under occlusal loading
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The effect of the elastic modulus of low-viscosity resins on the microleakage of Class V resin composite restorations under occlusal loading

机译：低黏度树脂的弹性模量对咬合载荷下V类树脂复合修复体微渗漏的影响

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摘要

This study aimed to evaluate the effectiveness of various intermediate layers on the microleakage of Class V restorations under an occlusal load. Wedge-shaped cavities were prepared on the buccal surface of 72 extracted premolars, which were then treated with an adhesive system (One Up Bond F Plus), divided into three groups, and restored with: 1) Estelite Sigma resin composite, 2) a resin composite with Low Flow flowable composite, or 3) a resin composite with High Flow flowable composite. The specimens were subjected to a nano-indentation test to evaluate the elastic modulus of successive layers at the resin-dentine interface and were subjected to a microleakage test under either unloaded or loaded conditions. The elastic moduli were significantly different among substrates (p <0.05), except between the hybrid layer/Low Flow and the hybrid layer/High Flow. The elastic moduli of the Low Flow composite were higher than those of the High Flow composite. Occlusal force increased dentine leakage in the group that was restored without flowable composites.
机译：这项研究旨在评估咬合负荷下各个中间层对V类修复体微渗漏的有效性。在72个拔出的前磨牙的颊面制备楔形空腔，然后将其用粘合系统（One Up Bond F Plus）处理，分为三组，并用以下方法修复：1）Estelite Sigma树脂复合材料，2）a具有低流量可流动复合材料的树脂复合材料，或3）具有高流量可流动复合材料的树脂复合材料。对样品进行纳米压痕测试以评估树脂-牙本质界面上连续层的弹性模量，并在无负载或有负载条件下进行微渗漏测试。除了在混合层/低流动和混合层/高流动之间，弹性模量在基板之间显着不同（> 0.05）。低流动复合材料的弹性模量高于高流动复合材料的弹性模量。咬合力增加了在没有可流动复合材料的情况下恢复的牙本质渗漏。

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