Madhyastha Prashanthi S, Naik Dilip G, Natarajan Srikant, Vinodhini Rachel Sarah
Department of Dental Materials, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Manipal 575001, Karnataka, India.
Department of Periodontics, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Manipal 575001, Karnataka, India.
Dent J (Basel). 2025 Apr 30;13(5):197. doi: 10.3390/dj13050197.
The fluoride-releasing properties of restorative materials are crucial for the prevention of secondary caries as these can act as fluoride reservoirs. Hence, the present study aimed to investigate, assess, and compare the impact of time, temperature, and storage conditions on the fluoride release of silorane-based composites (SBCs) and methacrylate-based composites (MBCs), and also evaluate the variation in their reuptake of fluoride (after recharge). SBC and MBC test samples of 10 mm × 2 mm dimensions were prepared and tested for fluoride release and recharge in distilled water and artificial saliva at temperatures of 4 °C, 37 °C, and 55 °C. The amount of fluoride released (at 1, 7, 14, and 28 days) and re-released after recharge (with 5000 ppm neutral sodium fluoride (NaF) solution for 5 min at 1, 3, and 7 days for 3 weeks) were studied with the help of a fluoride-selective ion electrode. SBCs had a greater release of fluoride at low temperature in artificial saliva (0.07 ± 0.03) when compared to MBCs (0.04 ± 0.005). Fluoride release increased on day 7 but decreased over time ( < 0.05). Fluoride re-release was greater in MBCs than SBCs and it increased with time ( < 0.05). The amount of fluoride release and recharge depends on the time interval, temperature, and storage condition. These restorative materials can serve as fluoride reservoirs and contribute to sustained fluoride release in oral fluids, thereby preventing the initiation of secondary caries and the failure of restorations. In addition, it may assist in developing measures to improve fluoride delivery for topical applications.
修复材料的氟释放特性对于预防继发龋至关重要，因为这些材料可作为氟储存库。因此，本研究旨在调查、评估和比较时间、温度和储存条件对硅氧烷基复合材料（SBCs）和甲基丙烯酸酯基复合材料（MBCs）氟释放的影响，并评估其氟再摄取（再充电后）的变化。制备了尺寸为10 mm×2 mm的SBC和MBC测试样品，并在4℃、37℃和55℃的温度下于蒸馏水和人工唾液中测试其氟释放和再充电情况。借助氟选择性离子电极研究了（在第1、7、14和28天）释放的氟量以及再充电后（在第1、3和7天用5000 ppm中性氟化钠（NaF）溶液处理5分钟，共3周）再次释放的氟量。与MBCs（0.04±0.005）相比，SBCs在人工唾液中低温下的氟释放量更大（0.07±0.03）。氟释放在第7天增加，但随时间减少（<0.05）。MBCs中的氟再释放量大于SBCs，且随时间增加（<0.05）。氟释放和再充电的量取决于时间间隔、温度和储存条件。这些修复材料可作为氟储存库，并有助于在口腔液体中持续释放氟，从而预防继发龋的发生和修复体的失败。此外，它可能有助于制定措施以改善局部应用的氟输送。
