Alkhudhairy Fahad I, Ahmad Zeeshan H
Department of Restorative Dental Sciences, King Saud University, College of Dentistry, Riyadh, Kingdom of Saudi Arabia.
Department of Endodontics, College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia, e-mail:
J Contemp Dent Pract. 2016 Dec 1;17(12):997-1002.
Various bulk-fill materials depending on their composition, viscosity, and flow ability have different physical and mechanical properties. The aim of this in vitro study was to determine and compare the shear bond strength and microleakage properties of activa restorative with other bulk-fill restorative materials surefil (SDR), Biodentine, ever X posterior.
Forty permanent premolars were selected for shear bond strength, and 20 permanent premolars were selected with class II cavities on mesial and distal side for microleakage. Universal testing device was used to assess the shear bond strength. Microleakage was checked using dye penetration method under a stereomicroscope. Mean and standard deviation values were calculated from the recorded values. Intergroup comparison was done by one-way analysis of variance (ANOVA) followed by pairwise comparison using Tukey honestly significant difference (HSD) post hoc test.
The mean shear bond strength was highest for SDR surefil followed by Ever X posterior, Bioactive restorative, and Biodentine respectively. In this study, SDR (surefil) showed better shear bond strength and better microleakage properties compared with the other test materials (F = 186.7157, p < 0.05).
The result of this study showed that flowable and fiber-reinforced composites have better shear bond strength and microleakage properties.
Flowable bulk-fill composite resins can be used as dentin substitutes because of its superior properties.
各种大块充填材料因其成分、粘度和流动性不同，具有不同的物理和机械性能。本体外研究的目的是测定并比较Activa修复材料与其他大块充填修复材料Surefil（SDR）、Biodentine、Ever X Posterior的剪切粘结强度和微渗漏性能。
选取40颗恒牙前磨牙用于测试剪切粘结强度，选取20颗在近中面和远中面有Ⅱ类洞的恒牙前磨牙用于测试微渗漏。使用万能测试装置评估剪切粘结强度。在体视显微镜下采用染料渗透法检查微渗漏情况。根据记录值计算平均值和标准差。组间比较采用单因素方差分析（ANOVA），随后使用Tukey真实显著差异（HSD）事后检验进行两两比较。
Surefil（SDR）的平均剪切粘结强度最高，其次分别是Ever X Posterior、生物活性修复材料和Biodentine。在本研究中，与其他测试材料相比，Surefil（SDR）表现出更好的剪切粘结强度和微渗漏性能（F = 186.7157，p < 0.05）。
本研究结果表明，可流动和纤维增强复合材料具有更好的剪切粘结强度和微渗漏性能。
可流动大块充填复合树脂因其优异性能可作为牙本质替代物使用。
