Alkhudhayri Sumayyah L, Alhassani Shahad L, Alahmadi Reem J, Alharbi Mariam R, Redwan Hetaf S, Hawsawi Rayan A
College of Dental Medicine, Umm Al-Qura University, Makkah, SAU.
Restorative Department, College of Dental Medicine, Umm Al-Qura University, Makkah, SAU.
Cureus. 2024 Jul 27;16(7):e65548. doi: 10.7759/cureus.65548. eCollection 2024 Jul.
Background A single-shade resin composite is a new type of resin composite that was introduced in 2019. There is not much data regarding the water sorption (Wsp) and water solubility (Wsl) of this type of resin composite. Therefore, this study aimed to investigate Wsp and Wsl and their effects on the surface roughness of a single-shade nano-hybrid resin composite in comparison with a conventional nano-hybrid resin composite in accordance with ISO 4049:2019 (Dentistry - Polymer-based Restorative Materials). Material and methods An in vitro study was performed to investigate the Wsp and Wsl of a single-shade supra-nano-hybrid composite (Omnichroma) and a conventional nano-hybrid composite (Filtek Z250 XT) in accordance with ISO 4049:2019. Five disks were prepared of each material with dimensions of 15 ± 1 mm in diameter and 1 ± 0.1 mm in thickness, as per ISO 4049:2019. The results were calculated according to the ISO equations for Wsp and Wsl in µg/mm. Atomic force microscopy (AFM) was used to analyze the surface roughness (R) of test specimens. Results The findings showed that the values of Wsl and Wsp of both materials are comparable and revealed no statistically significant difference (P > 0.05). The AFM images showed a higher R post-solubility testing, and the statistical analysis indicated a significant difference for both materials. Conclusions The study concluded that the single-shade resin composite (Omnichroma) and the conventional nano-hybrid composite (Filtek Z250 XT) are following the requirements of ISO 4049:2019. The AFM analysis indicated that resin composite surfaces are significantly affected when exposed to water for a prolonged period of time. However, the R variations of Filtek Z250 XT were higher than Omnichroma specimens. These results indicate that resin composite surfaces can be significantly impacted by prolonged water exposure. This knowledge is critical for enhancing the long-term clinical performance and durability of these dental restorative materials.
背景 单色调树脂复合材料是2019年推出的一种新型树脂复合材料。关于这类树脂复合材料的吸水性（Wsp）和水溶性（Wsl）的数据不多。因此，本研究旨在根据ISO 4049:2019（牙科——基于聚合物的修复材料），研究单色调纳米混合树脂复合材料与传统纳米混合树脂复合材料的Wsp和Wsl及其对表面粗糙度的影响。
材料与方法 按照ISO 4049:2019进行体外研究，以研究单色调超纳米混合复合材料（Omnichroma）和传统纳米混合复合材料（Filtek Z250 XT）的Wsp和Wsl。根据ISO 4049:2019，每种材料制备5个圆盘，直径为15±1mm，厚度为1±0.1mm。结果根据ISO关于Wsp和Wsl的方程以μg/mm计算。使用原子力显微镜（AFM）分析测试样本的表面粗糙度（R）。
结果 研究结果表明，两种材料的Wsl和Wsp值具有可比性，且无统计学显著差异（P>0.05）。AFM图像显示在溶解度测试后R值更高，统计分析表明两种材料均存在显著差异。
结论 该研究得出结论，单色调树脂复合材料（Omnichroma）和传统纳米混合复合材料（Filtek Z250 XT）符合ISO 4049:2019的要求。AFM分析表明，长时间接触水时，树脂复合材料表面会受到显著影响。然而，Filtek Z250 XT的R变化高于Omnichroma样本。这些结果表明，长时间接触水会对树脂复合材料表面产生显著影响。这些知识对于提高这些牙科修复材料的长期临床性能和耐久性至关重要。
