Department of Pediatric Dentistry, Faculty of Dentistry, Çanakkale Onsekiz Mart University, Turkey.
Department of Restorative Dentistry, Faculty of Dentistry, Çanakkale Onsekiz Mart University, Turkey.
Forensic Sci Med Pathol. 2021 Mar;17(1):78-86. doi: 10.1007/s12024-020-00345-x. Epub 2021 Jan 20.
This study aimed to observe the effects of high temperature on different restorative dental materials by detecting changes in their microstructural and elemental composition. Disk shaped samples (10 mm diameter, 2 mm depth) were prepared from 8 dental materials (compomer, glass carbomer, ormocer, giomer, zinc reinforced glass ionomer (GI), silver-alloy reinforced GI, zirconia reinforced GI, and conventional GI). Scanning electron microscopy/Energy dispersive X-ray spectroscopy (SEM/EDS) was used to characterize sample surface structures and elemental composition. The same samples were also analyzed using X-ray fluorescence (XRF) to determine the trace element content. Each sample was placed in a porcelain furnace and exposed to 900 °C for 30 min. Observations of macroscopic changes in samples after exposure high temperature were recorded. The microstructural changes in sample surfaces after incineration were detected by SEM. The elemental compositions obtained before and after the incineration were compared after repeating the XRF and EDS analyses. Dental materials demonstrated specific macroscopic changes and microstructural deteriorations detected by SEM images after exposure to high temperature. While several changes occurred in the elemental content of materials in terms of amount, the original elemental composition was preserved. The ability to distinguish dental materials by elemental analyses has had an important impact on the identification process.
本研究旨在通过检测不同修复牙科材料微观结构和元素组成的变化，观察高温对它们的影响。从 8 种牙科材料（复合体、玻璃碳、有机硅、聚酸酯、锌增强型玻璃离子水门汀（GI）、银合金增强型 GI、氧化锆增强型 GI 和传统 GI）中制备圆盘状样品（直径 10mm，深度 2mm）。扫描电子显微镜/能谱仪（SEM/EDS）用于表征样品表面结构和元素组成。使用 X 射线荧光（XRF）分析相同的样品以确定微量元素含量。将每个样品放置在瓷炉中并在 900°C 下暴露 30 分钟。记录暴露于高温后样品宏观变化的观察结果。通过 SEM 检测样品表面在燃烧后的微观结构变化。重复 XRF 和 EDS 分析后，比较燃烧前后获得的元素组成。暴露于高温后，牙科材料表现出特定的宏观变化和 SEM 图像检测到的微观结构恶化。尽管材料的元素含量在数量上发生了一些变化，但原始的元素组成得以保留。通过元素分析来区分牙科材料的能力对鉴定过程产生了重要影响。
