Jowkar Zahra, Jowkar Mohammad, Shafiei Fereshteh
Assistant professor, Oral and Dental Disease Research Center, Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Postgraduate Student, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
J Clin Exp Dent. 2019 Mar 1;11(3):e275-e281. doi: 10.4317/jced.55522. eCollection 2019 Mar.
The aim of this study was to investigate the mechanical properties and dentin microshear bond strength of a conventional glass ionomer cement (GIC) compared to GIC supplemented with silver nanoparticles (SNPs) at 0.1% and 0.2% (w/w).
SNPs were incorporated into a conventional GIC at 0.1% and 0.2% (w/w). The unmodified GIC was used as the control group. Compressive strength, flexural strength, and micro-shear bond strength (µSBS) to dentin were evaluated using a universal testing machine. Surface microhardness was determined using a Vickers microhardness tester. The data were analyzed using one-way analysis of variance (ANOVA) and Tukey's test.
GICs containing 0.1% and 0.2% (w/w) SNPs significantly improved compressive strength, surface microhardness, and dentin µSBS compared to the unmodified GIC (<0.05). A significant increase in the flexural strength was found for the GIC containing 0.2% (w/w) SNPs (<0.05). However, the GIC containing 0.1% (w/w) SNPs did not affect flexural strength.
GIC supplemented with SNP is a promising material for restoration because of its improved mechanical and bond strength properties. Therefore, it may be suggested for use especially in higher stress-bearing site restorations. Glass ionomer cement, mechanical properties, micro-shear bond strength, silver nanoparticle.
本研究旨在调查传统玻璃离子水门汀（GIC）与添加了0.1%和0.2%（w/w）银纳米颗粒（SNP）的GIC相比的力学性能和牙本质微剪切粘结强度。
将SNP以0.1%和0.2%（w/w）的比例掺入传统GIC中。未改性的GIC用作对照组。使用万能试验机评估抗压强度、抗弯强度和与牙本质的微剪切粘结强度（µSBS）。使用维氏显微硬度计测定表面显微硬度。数据采用单因素方差分析（ANOVA）和Tukey检验进行分析。
与未改性的GIC相比，含有0.1%和0.2%（w/w）SNP的GIC显著提高了抗压强度、表面显微硬度和牙本质µSBS（<0.05）。发现含有0.2%（w/w）SNP的GIC的抗弯强度显著增加（<0.05）。然而，含有0.1%（w/w）SNP的GIC不影响抗弯强度。
添加SNP的GIC因其改善的力学性能和粘结强度性能而成为一种有前途的修复材料。因此，尤其建议在承受更高应力的部位修复中使用。玻璃离子水门汀、力学性能、微剪切粘结强度、银纳米颗粒。
