Elmamooz Nafise, Eskandarizadeh Ali, Haghani Jahangir, Doosty Zahra, Rahimi Faranak, Shakerifar Maryam
Department of Restorative Dentistry, School of Dentistry, Kerman University of Medical Sciences, Kerman, IRN.
Department of Oral and Maxillofacial Radiology, School of Dentistry, Kerman University of Medical Sciences, Kerman, IRN.
Cureus. 2025 Jul 31;17(7):e89150. doi: 10.7759/cureus.89150. eCollection 2025 Jul.
Bulk-fill composites are a class of restorative materials introduced to speed up the restoration process in the posterior area. This study aimed to compare the water sorption and solubility of a bulk-fill resin composite with its conventional counterpart at various depths after one week and one month of water storage.
Five cylindrical specimens (15 × 8 mm) of each composite resin, Tetric N Ceram Bulk fill and Tetric N Ceram (Schaan, Liechtenstein: Ivoclar Vivadent), were prepared using a metal split mold. The conventional composite was placed incrementally in 2 mm layers, while the bulk-fill composite was applied in a single layer. Specimens were cured and polished, then cut into disc-shaped samples (1 mm thickness and 15 mm diameter) (n=40, five disks per depth for each composite). Water sorption and solubility were assessed after one week and one month of immersion in distilled water at 37±1 °C. Statistical analysis was performed using repeated measures analysis of variance and t-test (p≤0.05).
The bulk-fill composite exhibited significantly higher water sorption and solubility than the conventional composite at all depths measured. Water sorption and solubility increased with depth and were significantly greater after one month compared to one week.
The bulk-fill composite demonstrated higher water sorption and solubility compared to the conventional composite, with significant variations observed at different depths over time. A conventional composite may work better in terms of water sorption and solubility, and must be considered in extensive posterior restorations.
大块充填复合树脂是一类为加速后牙区修复过程而引入的修复材料。本研究旨在比较大块充填树脂复合材料与其传统同类材料在水储存1周和1个月后不同深度的吸水率和溶解性。
使用金属分体模具制备每种复合树脂（Tetric N Ceram Bulk fill和Tetric N Ceram，列支敦士登沙恩：义获嘉伟瓦登特公司）的5个圆柱形试件（15×8mm）。传统复合树脂以2mm层逐层放置，而大块充填复合树脂以单层施用。试件固化并抛光，然后切成盘状样品（厚度1mm，直径15mm）（n = 40，每种复合材料每个深度5个盘）。在37±1°C的蒸馏水中浸泡1周和1个月后评估吸水率和溶解性。使用重复测量方差分析和t检验进行统计分析（p≤0.05）。
在所有测量深度，大块充填复合树脂的吸水率和溶解性均显著高于传统复合树脂。吸水率和溶解性随深度增加，且1个月后显著高于1周后。
与传统复合树脂相比，大块充填复合树脂表现出更高的吸水率和溶解性，随时间推移在不同深度观察到显著差异。就吸水率和溶解性而言，传统复合树脂可能效果更好，在广泛的后牙修复中必须予以考虑。
