Department of Dental Prostheses Technology (Dental Technology), "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041 Timișoara, Romania.
National Institute for Research and Development in Electrochemistry and Condensed Matter, 300569 Timisoara, Romania.
Molecules. 2020 Jul 28;25(15):3407. doi: 10.3390/molecules25153407.
The development of various dental glass-ceramic materials and the evolution of novel processing technologies lead to an essential change in the clinical and technical workflow. The long-term success of a dental restoration treatment is defined by its durability, which is directly influenced by the oral environment. This study's purpose was to evaluate the artificial aging behavior of nanostructured, respective microstructured ceramics related to surface topography, roughness, and optical properties. Six monolithic restoration materials were selected: milled lithium disilicate glass-ceramic (LDS-M) MT (medium translucency), hot-pressed lithium disilicate glass-ceramic (LDS-P) MT and HT (high translucency), milled zirconia-reinforced lithium silicate ceramic (ZLS-M) MT and hot-pressed zirconia-reinforced lithium silicate ceramic (ZLS-P) MT and HT, resulting = 96 surfaces. All the samples were artificially aged by thermal cycling, and all investigations were made before and after thermal cycling. In terms of optical properties, differences recorded between ZLS and LDS ceramics are not significant. Thermal cycling increases the translucency of ZLS and LDS glass-ceramic materials significantly, with the most harmful effect on the pressed and polished samples. Micro- and nano roughness are significantly influenced by in vitro aging and a negative correlation was recorded. Glazed samples are characterized by significant rougher surfaces for all types of materials. On nanolevel, ZLS materials are significantly smoothed by thermal cycling.
各种牙科玻璃陶瓷材料的发展和新型加工技术的演变，导致临床和技术工作流程发生了重大变化。牙科修复治疗的长期成功取决于其耐久性，而这直接受到口腔环境的影响。本研究旨在评估与表面形貌、粗糙度和光学性能相关的纳米结构和相应的微观结构陶瓷的人工老化行为。选择了六种整体修复材料：铣削锂硅玻璃陶瓷（LDS-M）MT（中透光率）、热压锂硅玻璃陶瓷（LDS-P）MT 和 HT（高透光率）、铣削氧化锆增强硅酸锂陶瓷（ZLS-M）MT 和热压氧化锆增强硅酸锂陶瓷（ZLS-P）MT 和 HT，共 96 个表面。所有样品均通过热循环进行人工老化，并在热循环前后进行所有测试。在光学性能方面，ZLS 和 LDS 陶瓷之间的差异并不显著。热循环显著提高了 ZLS 和 LDS 玻璃陶瓷材料的透光率，对压制和抛光样品的影响最大。微观和纳米粗糙度受到体外老化的显著影响，并且记录到了负相关关系。上釉样品的所有类型材料的表面粗糙度都明显较大。在纳米水平上，热循环显著使 ZLS 材料变得光滑。
