Camilotti Veridiana, Mendonça Márcio J, Dobrovolski Max, Detogni Anna C, Ambrosano Gláucia M B, De Goes Mario F
Department of Restorative Dentistry, State University of West Paraná.
Department of Biostatistics, Piracicaba Dental School, State University of Campinas.
J Oral Sci. 2020 Dec 23;63(1):18-21. doi: 10.2334/josnusd.19-0518. Epub 2020 Nov 17.
This in vitro study was performed to evaluate the surface roughness (Ra) and morphology by scanning electron microscopy (SEM) of composite resins that had been stored in acidic solutions typical of those present in the diet. Three composite resins (4 Seasons, Z250, and P90) were selected and divided into three groups (n = 7) according to the solutions tested: G1: distilled water; G2, Coca-cola, and G3: orange juice. The Ra test was repeated after immersion periods of 15, 90, and 180 days. The mean Ra values were subjected to LS means analysis and the Tukey-Kramer (P < 0.05). One test specimen of each composite resin was selected for SEM analysis after each period. The Ra data indicated that P90 had the lowest Ra values. 4 Seasons and Z250 had statistically similar roughness values for all the solutions and evaluation periods. With the exception of 180-day immersion in Coca-cola, 4 Seasons showed significantly higher values than Z250. SEM analysis showed that P90 was the composite resin most resistant to the actions of all acid solutions for the periods analyzed. Interaction between components of the solutions and the active components of other dietary items, as well as oral hygiene, may affect the chemical degradation of composite resins.
本体外研究旨在通过扫描电子显微镜（SEM）评估复合树脂在典型饮食酸性溶液中储存后的表面粗糙度（Ra）和形态。选择了三种复合树脂（4 Seasons、Z250和P90），并根据测试溶液分为三组（n = 7）：G1：蒸馏水；G2：可口可乐；G3：橙汁。在浸泡15、90和180天后重复进行Ra测试。对平均Ra值进行最小二乘均值分析和Tukey-Kramer检验（P < 0.05）。在每个时间段后，从每种复合树脂中选取一个测试样本进行SEM分析。Ra数据表明，P90的Ra值最低。在所有溶液和评估时间段内，4 Seasons和Z250的粗糙度值在统计学上相似。除了在可口可乐中浸泡180天外，4 Seasons的值均显著高于Z250。SEM分析表明，在所分析的时间段内，P90是对所有酸性溶液作用最具抗性的复合树脂。溶液成分与其他饮食项目的活性成分之间的相互作用以及口腔卫生可能会影响复合树脂的化学降解。
