Farghal Nancy Soliman, Abu Shamleh Ayya, Al Hurmuzi Osamah, Mahmoud Okba
Department of Restorative Dentistry and Endodontics, RAK College of Dental Sciences, RAK Medical and Health Sciences University, Ras Al-Khaimah, United Arab Emirates.
Department of Dental Biomaterials, Faculty of Dentistry, Tanta University, Tanta, Egypt.
Front Oral Health. 2025 Jun 2;6:1539527. doi: 10.3389/froh.2025.1539527. eCollection 2025.
Preheating the high-viscosity forms of bulk-fill resin composites is recommended to enhance their flow and adaptability. Nevertheless, the impact of preheating on their characteristics upon exposure to carbonated beverages remains unclear. This study aims to evaluate the effect of a Cola beverage on the properties of preheated and non-preheated high-viscosity bulk-fill composite resins .
Forty disc-shaped specimens were prepared from each of BEAUTIFIL-Bulk Restorative (BB) and Filtek One Bulk-fill (FOB) composite resin, then divided into two groups ( = 20), either preheated to 68°C for 15 min or kept at room temperature before polymerization, then specimens were immersed in Alkozay Cola beverage for 30 days (3 periods of 15 min/day). Color stability (ΔE), surface gloss (GU) and Vickers Microhardness (VHN) were recorded before and after the Cola immersion. The data was analyzed with Two-way ANOVA, Three-way ANOVA and Tukey's HSD test using SPSS software at 95% significance level.
The color change was significantly higher in BB than FOB in all groups ( < 0:001), FOB had a significant reduction in color change after preheating ( < 0.05) while BB had no significant change ( > 0.05). Preheating significantly increased the gloss of BB and reduced that of FOB ( < 0.001), however, Cola beverage significantly reduced the gloss of all the groups ( < 0.001). Preheating significantly increased the microhardness of both materials ( < 0.001), however, Cola beverage significantly reduced the microhardness of all the groups ( < 0.001).
Although the preheating of high-viscosity bulk-fill composites significantly improved their microhardness and improved the surface gloss of FOB, it did not protect both composites against the Cola drink attack. Preheated FOB showed improved color stability after the Cola immersion, but not to a clinically acceptable limit.
建议对大容量填充树脂复合材料的高粘度形式进行预热，以提高其流动性和适应性。然而，预热对其暴露于碳酸饮料后特性的影响仍不清楚。本研究旨在评估可乐饮料对预热和未预热的高粘度大容量填充复合树脂性能的影响。
从BEAUTIFIL-Bulk Restorative（BB）和Filtek One Bulk-fill（FOB）复合树脂中各制备40个圆盘形试样，然后分为两组（每组 = 20个），一组在聚合前预热至68°C 15分钟，另一组在室温下保存，然后将试样浸入Alkozay可乐饮料中30天（每天3个15分钟时间段）。在可乐浸泡前后记录颜色稳定性（ΔE）、表面光泽度（GU）和维氏显微硬度（VHN）。使用SPSS软件在95%显著性水平下通过双向方差分析、三向方差分析和Tukey's HSD检验对数据进行分析。
在所有组中，BB的颜色变化均显著高于FOB（P < 0.001），FOB预热后颜色变化显著降低（P < 0.05），而BB无显著变化（P > 0.05）。预热显著增加了BB的光泽度并降低了FOB的光泽度（P < 0.001），然而，可乐饮料显著降低了所有组的光泽度（P < 0.001）。预热显著增加了两种材料的显微硬度（P < 0.001），然而，可乐饮料显著降低了所有组的显微硬度（P < 0.001）。
虽然高粘度大容量填充复合材料的预热显著提高了其显微硬度并改善了FOB的表面光泽度，但它并不能保护两种复合材料免受可乐饮料的侵蚀。预热后的FOB在可乐浸泡后显示出改善的颜色稳定性，但未达到临床可接受的限度。
