Evaluation of Fracture Toughness, Color Stability, and Sorption Solubility of a Fabricated Novel Glass Ionomer Nano Zirconia-Silica-Hydroxyapatite Hybrid Composite Material

摘要

The aim of this study was to investigate the effects of adding a nano zirconia-silica-hydroxyapatite (nanoZrO 2 -SiO 2 -HA) composite synthesized using a one-pot sol-gel technique to a conventional glass ionomer cement (GIC), which was then characterized using X-ray diffraction (XRD). Following the characterization studies, further investigations were carried out after the addition of nanoZrO 2 -SiO 2 -HA to cGIC (GIC nanoZrO 2 -SiO 2 -HA) at various percentages (~5% to 9%) to compare their fracture toughness, color stability, and sorption- solubility in relation to cGIC (Fuji IX). The XRD diffractogram indicated the presence of peaks for ZrO 2 , SiO 2 , and HA. The fracture toughness of GIC 5%nanoZrO 2 -SiO 2 -HA was statistically higher than that of other percentages of GIC nanoZrO 2 -SiO 2 -HA and cGIC. The highest values recorded were fracture toughness ( ), leading to an increase of ～57%, as compared to cGIC. Overall, the color change ( ) values for GIC 5% nano Zr-Si-HA group were lower than those of cGIC over a one-month period and were between slight and perceptible. In addition, GIC 5%nanoZrO 2 -SiO 2 -HA recorded lower sorption values ( ) as compared to cGIC ( ) and higher solubility ( ) as compared to cGIC ( ). The addition of nanoZrO 2 -SiO 2 -HA to cGIC significantly enhanced its physicomechanical properties. Based on the results of our study, GIC nanoZrO 2 -SiO 2 -HA has the potential to be suggested as a restorative dental material with diverse applications ranging from cavity restoration, core build-up, and as a luting material.