Amin Faiza, Moin Syed Faraz, Kumar Naresh, Asghar Muhammad Asif, Mahmood Syed Junaid, Palma Paulo J
Department of Science of Dental Materials, Dow Dental College, Dow University of Health Sciences, Karachi 74200, Pakistan.
Dr Zafar H Zaidi Center for Proteomics, University of Karachi, Karachi 75270, Pakistan.
Int J Mol Sci. 2025 Jun 4;26(11):5382. doi: 10.3390/ijms26115382.
Glass ionomer cements (GICs) have been clinically attractive dental restorative materials for many years and are widely used as luting, lining, and restorative materials. However, these materials still have limitations in terms of weak physio-mechanical properties. The aim of the study was to evaluate the effect of zirconium oxide nanoparticles (nano-ZrO particles) on the physical and mechanical properties of two commercially available GICs. Four groups were prepared for each material: the control group (without nanoparticles) and three groups modified by the incorporation of nanoparticles at 2, 5, and 7 weight% (wt%). Firstly, the morphology and size of the nanoparticles were evaluated via scanning electron microscopy (SEM) and X-ray diffraction (XRD). Secondly, flexural strength, flexural modulus, Vickers hardness, water sorption, and solubility were evaluated. The main effect plots revealed that the addition of nano-ZrO particles enhances flexural strength, flexural modulus, and water sorption of GICs at a 7 wt% concentration and Vickers hardness at a 2 wt% concentration. The SEM analysis clearly shows that the cracks became narrower with the addition of nano-ZrO particles, whereas these cracks were completely closed at 7% nano-ZrO particles. The findings of the study appear promising, and it is anticipated that the optimization of nano-ZrO particles may aid the development of improved materials for load-bearing restorations.
玻璃离子水门汀（GICs）多年来一直是临床上具有吸引力的牙科修复材料，被广泛用作粘结、衬层和修复材料。然而，这些材料在物理机械性能较弱方面仍存在局限性。本研究的目的是评估氧化锆纳米颗粒（纳米ZrO颗粒）对两种市售GICs物理和机械性能的影响。每种材料制备四组：对照组（无纳米颗粒）和通过掺入2%、5%和7%重量百分比（wt%）的纳米颗粒改性的三组。首先，通过扫描电子显微镜（SEM）和X射线衍射（XRD）评估纳米颗粒的形态和尺寸。其次，评估弯曲强度、弯曲模量、维氏硬度、吸水性和溶解性。主要效应图显示，添加纳米ZrO颗粒在7 wt%浓度下可提高GICs的弯曲强度、弯曲模量和吸水性，在2 wt%浓度下可提高维氏硬度。SEM分析清楚地表明，添加纳米ZrO颗粒后裂纹变窄，而在7%纳米ZrO颗粒时这些裂纹完全闭合。该研究结果看起来很有前景，预计纳米ZrO颗粒的优化可能有助于开发用于承重修复的改良材料。
