Saati Keyvan, Valizadeh Sara, Ayyari Marjan, Amirifar Shahram
Restorative Dentistry Department, Azad University of Medical Sciences, Tehran, Iran.
Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
Front Dent. 2025 Mar 2;22:9. doi: 10.18502/fid.v22i9.18213. eCollection 2025.
The present study was conducted to compare the flexural strength of a bioactive composite and a reinforced hybrid glass ionomer (GI). In this in vitro experimental study, 10 rectangular-shaped specimens were fabricated from Activa Bioactive composite (N=5) and EQUIA Forte Coat GI (N=5) using stainless steel molds with internal dimensions of 2×2×25mm according to the manufacturers' instructions. The flexural strength of the specimens was measured with a universal testing machine with the three-point bending test using a load of 50±16N/min at a crosshead speed of 0.75±0.25mm/min. The data were analyzed using the Mann-Whitney U test (α=0.05). The mean flexural strength was 57.91MPa for the bioactive composite and 19.20MPa for the reinforced hybrid GI. The mean flexural strength of the bioactive composite was significantly higher than that of hybrid GI (P=0.008). Within the limitations of this in vitro study, the results indicate that the Activa Bioactive composite exhibits greater flexural strength compared to EQUIA Forte Coat GI.
本研究旨在比较一种生物活性复合材料与一种增强型混合玻璃离子体（GI）的抗弯强度。在这项体外实验研究中，根据制造商的说明，使用内部尺寸为2×2×25mm的不锈钢模具，由Activa生物活性复合材料（N = 5）和EQUIA Forte Coat GI（N = 5）制作了10个矩形试样。使用万能试验机以三点弯曲试验测量试样的抗弯强度，加载速度为50±16N/分钟，十字头速度为0.75±0.25mm/分钟。使用曼-惠特尼U检验（α = 0.05）分析数据。生物活性复合材料的平均抗弯强度为57.91MPa，增强型混合玻璃离子体为19.20MPa。生物活性复合材料的平均抗弯强度显著高于混合玻璃离子体（P = 0.008）。在这项体外研究的局限性范围内，结果表明，与EQUIA Forte Coat GI相比，Activa生物活性复合材料表现出更大的抗弯强度。
