Kumari C Meena, Bhat K Manohar, Bansal Rahul, Singh Nitika, Anupama A, Lavanya T
Department of Conservative Dentistry and Endodontics, S. J. M. Dental College and Hospital, Chitrdurga, Karnataka, India.
Department of Pedodontia, Jaipur Dental College, Jaipur, Rajasthan, India.
Contemp Clin Dent. 2019 Apr-Jun;10(2):289-293. doi: 10.4103/ccd.ccd_535_18.
Restorative resins during their prolonged use are exposed to variety foods and beverages are subjected to wear, degradation, and staining resulting in failure of restoration and require replacement. This study is aimed to evaluate surface roughness and hardness of five commercially available posterior resin composites following exposure to various food-simulating liquids (FSLs).
Specimens were immersed in distilled water, ethanol, citric acid, and air and later examined using a profilometer, scanning electron microscope for the surface profiles. Hardness was measured by Vickers Hardness test.
Results were subjected to two-way ANOVA and Tukey's multiple test.
There were significant differences in results among the composite resin tested. Inter comparison between materials after treating with FSLs, clear fill majesty (CFM) and Z350 showed better hardness values under the influence of ethanol, followed by Ever X, Tetric Evo Ceram and Sure fill SDR. None of the composites were unaffected by air compared to FSLs. Citric acid had reduced the hardness of CFM and had caused surface roughness on Sure fill SDR and Tetric Evo Ceram. Distilled water reduced hardness of CFM and SureFil SDR. EverX was not affected by any of the FSL either in hardness or surface roughness properties. All composites showed surface irregularities in all media. Ethanol and water had almost similar effect on all composites.
Differences in hardness and surface roughness are due to different composition of resin matrix and different filler particles in all composite resin material tested.
复合树脂在长期使用过程中会接触各种食物和饮料，会受到磨损、降解和染色，导致修复失败并需要更换。本研究旨在评估五种市售后牙复合树脂在接触各种食品模拟液（FSLs）后的表面粗糙度和硬度。
将试件浸泡在蒸馏水、乙醇、柠檬酸和空气中，随后使用轮廓仪、扫描电子显微镜检查表面轮廓。通过维氏硬度测试测量硬度。
对结果进行双向方差分析和Tukey多重检验。
所测试的复合树脂之间结果存在显著差异。在用FSLs处理后材料之间的相互比较中，Clear Fill Majesty（CFM）和Z350在乙醇影响下显示出更好的硬度值，其次是Ever X、Tetric Evo Ceram和Sure Fill SDR。与FSLs相比，没有一种复合材料不受空气影响。柠檬酸降低了CFM的硬度，并在Sure Fill SDR和Tetric Evo Ceram上造成了表面粗糙度。蒸馏水降低了CFM和SureFil SDR的硬度。EverX在硬度或表面粗糙度特性方面均不受任何一种FSL的影响。所有复合材料在所有介质中均显示出表面不规则性。乙醇和水对所有复合材料的影响几乎相似。
在所测试的所有复合树脂材料中，硬度和表面粗糙度的差异是由于树脂基质的不同组成和不同的填料颗粒所致。
