Moradian Marzieh, Nosrat Abadi Mohsen, Jafarpour Dana, Saadat Maryam
Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Eur J Dent. 2021 May;15(2):197-201. doi: 10.1055/s-0040-1717051. Epub 2020 Oct 30.
The purpose of this study was to evaluate the effect of bacterial cellulose nanocrystals (BCNCs) on the mechanical properties of resin-modified glass ionomer cements (RMGICs) including compressive strength (CS), diametral tensile strength (DTS), and modulus of elasticity ().
BCNCs were incorporated into RMGIC at various concentrations (0.3, 0.5, and 1 wt%). Unmodified RMGIC was used as the control group. The specimens were stored in distilled water at 37°C for 24 hours. CS and DTS, as well as modulus of elasticity, were evaluated using a universal testing machine. The nanostructure of BCNCs was observed via field emission scanning electron microscopy.
One-way analysis of variance and post-hoc Tukey tests were used for data analysis. Level of significance was at < 0.05.
The addition of BCNCs to RMGIC led to an increase in all of the tested mechanical properties compared with the control group, with a significant increase observed for 1 wt% BCNC. CS and DTS improved up to 23%, and modulus of elasticity increased by 44%.
The addition of BCNCs to the RMGIC improved the mechanical properties, including CS, elastic modulus, and DTS. Thus, the newly developed RMGICs with BCNCs might represent an ideal and promising novel dental material in restorative dentistry.
本研究旨在评估细菌纤维素纳米晶体（BCNCs）对树脂改性玻璃离子水门汀（RMGICs）力学性能的影响，包括抗压强度（CS）、径向拉伸强度（DTS）和弹性模量（ ）。
将BCNCs以不同浓度（0.3%、0.5%和1 wt%）加入RMGIC中。未改性的RMGIC用作对照组。将试件在37°C的蒸馏水中储存24小时。使用万能试验机评估CS、DTS以及弹性模量。通过场发射扫描电子显微镜观察BCNCs的纳米结构。
采用单因素方差分析和事后Tukey检验进行数据分析。显著性水平为 < 0.05。
与对照组相比，向RMGIC中添加BCNCs导致所有测试力学性能均有所提高，1 wt% BCNC时观察到显著提高。CS和DTS提高了23%，弹性模量提高了44%。
向RMGIC中添加BCNCs可改善力学性能，包括CS、弹性模量和DTS。因此，新开发的含BCNCs的RMGICs可能是修复牙科领域一种理想且有前景的新型牙科材料。
