Faculty of Dentistry, Department of Pediatric Dentistry, Istanbul University-Cerrahpaşa, Cerrahpaşa Yerleşkesi Kocamustafapaşa Caddesi No:53, Istanbul, 34098, Turkey.
Faculty of Dentistry, Department of Restorative Dentistry, Istanbul University-Cerrahpaşa, Istanbul, Turkey.
BMC Oral Health. 2024 Sep 27;24(1):1142. doi: 10.1186/s12903-024-04643-6.
The aim of this study is to evaluate the surface microhardness, surface chemical composition of bioactive restorative materials pre- and post- thermal aging.
A total of 200 disc-shaped samples were prepared by using the materials: Cention N, ACTIVA BioActive Restorative, Equia Forte HT Fil, Glass Fill glass carbomer cement (GCP), and Fuji II LC. Vickers microhardness test were used to measure surface hardness. Scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM/EDS) was used to determine the characterization of the microstructures and elemental analysis of the materials. These measurements were repeated after thermal aging. One-Way ANOVA test, Bonferroni test and the Games-Howell test was used for data analysis. The significance level was accepted as 0.05.
Cention N had the highest vickers microhardness value before thermal cycle. The highest fluoride ion ratio among the materials before thermal aging was detected in the Equia Forte HT Fil and Fuji II LC groups. While a decrease in fluorideF ion was detected in all groups except the Cention N group after thermal aging. It is observed that ACTIVA BioActive Restorative has a more microporous and rougher surface in the scanning electron microscopy image after the thermal cycle than in the image before the thermal cycle.
The chemical properties of the materials and the properties of the filler particles may be related to the differences in the mechanical properties, surface characterizations and ion releases of the materials Thermal aging affected the microhardness, surface characteristics and elemental mass ratios of the studied materials. Alkasite bioactive materials are more similar to composite restorative materials and show better mechanical properties than other materials, but do not have the same effect on fluoride release.
Most of the bioactive materials showed a decrease in the fluoride ion ratio after thermal aging, while no difference was found in the ion exchange of alkasite materials. Material selection should be made more carefully in caries-active individuals whose fluoride release is clinically important.
本研究旨在评估热老化前后生物活性修复材料的表面显微硬度和表面化学成分。
使用以下材料制备共 200 个圆盘状样本：Cention N、ACTIVA BioActive Restorative、Equia Forte HT Fil、Glass Fill glass carbomer 水泥（GCP）和 Fuji II LC。使用维氏显微硬度试验测量表面硬度。扫描电子显微镜-能量色散 X 射线光谱（SEM/EDS）用于确定材料的微观结构特征和元素分析。在热老化后重复这些测量。使用单向方差分析（One-Way ANOVA）检验、Bonferroni 检验和 Games-Howell 检验进行数据分析。显著性水平接受为 0.05。
在热循环之前，Cention N 具有最高的维氏显微硬度值。在热老化前，所有材料中氟离子比例最高的是 Equia Forte HT Fil 和 Fuji II LC 组。然而，在热老化后，除了 Cention N 组外，所有组的氟离子含量都有所下降。在热循环后，与热循环前相比，扫描电子显微镜图像中 ACTIVA BioActive Restorative 具有更多的微孔和更粗糙的表面。
材料的化学性质和填料颗粒的性质可能与材料的机械性能、表面特性和离子释放的差异有关。热老化影响了研究材料的显微硬度、表面特性和元素质量比。Alkasite 生物活性材料与复合修复材料更相似，机械性能优于其他材料，但对氟离子释放没有相同的影响。
大多数生物活性材料在热老化后氟离子比例下降，而 Alkasite 材料的离子交换没有差异。在氟离子释放对临床重要的龋齿活跃个体中，应更仔细地选择材料。
