Martins Rafael A, Marti Luana M, Mendes Ana C B, Fragelli Camila, Cilense Mario, Zuanon Angela C C
Department of Morphology and Pediatric Dentistry, São Paulo State University-UNESP, School of Dentistry, Mail Box: 331, 1680 Humaitá St., Araraquara, São Paulo 14801-903, Brazil.
Department of Chemical Physics, São Paulo State University-UNESP, School of Dentistry, 55 Prof. Francisco Degni St., Araraquara, São Paulo 14800-060, Brazil.
Int J Dent. 2022 Feb 21;2022:1641041. doi: 10.1155/2022/1641041. eCollection 2022.
This study evaluated the physical and mechanical properties of glass ionomer cement (GIC) associated with 5% hydroxyapatite nanoparticles (NPHAps) and 10% bioactive glass (BAG) 45S5 before and after brushing at different storage times. Surface roughness was evaluated using a rugosimeter, Vickers hardness using a microdurometer, and mass variation measured in an analytical balance at 1, 7, 15, 30, and 60 days before and after the brushing test, with the aid of toothbrushing simulator and soft bristle toothbrushes. Nonnormal distribution was observed, and the nonparametric Wilcoxon and Kruskal-Wallis tests followed by Dunn's were performed, with a significance level of 5%. We observed higher values for mass loss on the first day for all groups. The surface roughness was lower in the control and NP groups, 30 days after brushing. Higher values for hardness were found in the control group and lower ones for NP, after brushing. The control and BAG groups presented a decrease in hardness over time. The NP group presented the highest values before brushing, while the control group had the highest values after brushing. The association of NPHPa with the GIC is the most promising combination, since it presented satisfactory values for surface hardness. However, conventional GIC not associated with NPHPa or BAG is still an option, since it is available in the market and the most economically viable option.
本研究评估了与5%羟基磷灰石纳米颗粒（NPHAps）和10%生物活性玻璃（BAG）45S5相关的玻璃离子水门汀（GIC）在不同储存时间刷牙前后的物理和力学性能。使用粗糙度仪评估表面粗糙度，使用显微硬度计评估维氏硬度，并在刷牙试验前后的第1、7、15、30和60天借助牙刷模拟器和软毛牙刷在分析天平上测量质量变化。观察到数据呈非正态分布，进行了非参数威尔科克森检验和克鲁斯卡尔 - 沃利斯检验，随后进行邓恩检验，显著性水平为5%。我们观察到所有组在第一天的质量损失值更高。刷牙30天后，对照组和NP组的表面粗糙度较低。刷牙后，对照组的硬度值较高，NP组的硬度值较低。对照组和BAG组的硬度随时间降低。NP组在刷牙前呈现最高值，而对照组在刷牙后呈现最高值。NPHPa与GIC的组合是最有前景的组合，因为它的表面硬度值令人满意。然而，未与NPHPa或BAG结合的传统GIC仍然是一种选择，因为它在市场上有销售且是最经济可行的选择。
