Par Matej, Dukaric Ksenija, Marovic Danijela, Tauböck Tobias T, Attin Thomas, Tarle Zrinka
Department of Endodontics and Restorative Dentistry, University of Zagreb School of Dental Medicine, Gunduliceva 5, Zagreb, Croatia.
Private Dental Practice, Zagreb, Croatia.
Clin Oral Investig. 2024 Dec 18;29(1):19. doi: 10.1007/s00784-024-06108-0.
This study aimed to investigate the effect of a customized low-sodium bioactive glass (BG) fillers in experimental resin composites on their bond strength to dentin after 12 months of artificial aging. Specifically, it evaluated whether the bond strength was affected by different BG concentrations (0, 10, 20, 40 wt%) and artificial aging durations (1, 6, and 12 months).
Experimental composites were prepared with 10, 20, and 40 wt% of a customized low-sodium fluoride-containing BG. The experimental composite with 0 wt% BG was used as a control, while Beautifil II (Shofu) was used as an external reference material. A universal adhesive system was applied to dentin substrates and composite build-ups were made. Bond strength was measured using a macro-shear bond strength test, and Weibull statistics were used to assess the reliability of the materials. Failure modes were analyzed to evaluate the type of the fracture.
After 12 months, the bond strength of all experimental composites remained stable and comparable to the control material, with statistically significant improvements between 6 and 12 months for all experimental materials. The bond strength was statistically similar across materials, except at the 12-month point, where the 20 wt% BG-composite showed significantly higher bond strength than the 40 wt% BG-composite. The frequency of mixed failures in composite increased after 12 months, particularly in experimental composites containing higher BG content.
The incorporation of a customized low- sodium BG into resin composites did not negatively impact their bond strength to dentin over 12 months. Instead, bond strength improved over time, and the composites remained mechanically stable, although a higher incidence of mixed failures was observed with increased BG content.
The customized low-sodium BG demonstrated stable bond strength over the 12-month period, offering a promising option for functional fillers in restorative composites without compromising the longevity of the adhesive-dentin interface.
本研究旨在探讨定制的低钠生物活性玻璃（BG）填料对实验性树脂复合材料在人工老化12个月后与牙本质粘结强度的影响。具体而言，评估粘结强度是否受不同BG浓度（0、10、20、40 wt%）和人工老化时间（1、6和12个月）的影响。
用10、20和40 wt%的定制含低钠氟BG制备实验性复合材料。含0 wt% BG的实验性复合材料用作对照，而Beautifil II（松风）用作外部参考材料。将通用粘结系统应用于牙本质基质并制作复合树脂堆塑体。使用宏观剪切粘结强度试验测量粘结强度，并采用威布尔统计分析评估材料的可靠性。分析失效模式以评估断裂类型。
12个月后，所有实验性复合材料的粘结强度保持稳定，与对照材料相当，所有实验材料在6至12个月之间有统计学上的显著改善。除了在12个月时，20 wt% BG复合材料的粘结强度显著高于40 wt% BG复合材料外，各材料间的粘结强度在统计学上相似。12个月后，复合材料中混合失效的频率增加，特别是在含较高BG含量的实验性复合材料中。
在树脂复合材料中加入定制的低钠BG在12个月内不会对其与牙本质的粘结强度产生负面影响。相反，粘结强度随时间提高，复合材料保持机械稳定性，尽管随着BG含量增加观察到混合失效的发生率更高。
定制的低钠BG在12个月期间表现出稳定的粘结强度，为修复性复合材料中的功能性填料提供了一个有前景的选择，而不会损害粘结剂-牙本质界面的寿命。
