Glass Ionomer Cement Modified by Resin with Incorporation of Nanohydroxyapatite: In Vitro Evaluation of Physical-Biological Properties

Abstract

Resin-modified glass ionomer cement (RMGIC) has important properties. However, like other restorative materials, it has limitations such as decreased biocompatibility. The incorporation of nanoparticles (NP) in the RMGIC resulted in improvements in some of its properties. The aim of this study was to evaluate the physical-biological properties of RMGIC with the addition of nanohydroxyapatite (HANP). Material and Methods: Vitremer RMGIC was used, incorporating HANP by amalgamator, vortex and manual techniques, totaling ten experimental groups. The distribution and dispersion of the HANP were evaluated qualitatively by field emission scanning electron microscope (SEM-FEG). The evaluation of image porosity (SEM-FEG) with the help of imageJ. Cell viability 3-(4,5-dimethylthiazol-2yl)-2,5-diphenyl tetrazoline bromide (MTT) and cell morphology analyses were performed on MDPC-23 odontoblastoid cells at 24 and 72 h. Results: It was possible to observe good dispersion and distribution of HANP in the samples in all experimental groups. The incorporation of 5% HANP into the vortex stirred RMGIC resulted in fewer pores. The increase in the concentration of HANP was directly proportional to the decrease in cytotoxicity. Conclusions: It is concluded that the use of a vortex with the incorporation of 5% HANP is the most appropriate mixing technique when considering the smallest number of pores inside the material. A higher concentration of HANP resulted in better cell viability, suggesting that this association is promising for future studies of new restorative materials.

Effects of Nanohydroxyapatite Incorporation into Glass Ionomer Cement (GIC)

“…Other additives could be used to explore other potential improvements in the GIC properties. Cell viability increased when nHA is increased up to 10% [64] Abbreviation: HEMA-hydroxyethylmethacrylate, PAA-polyacrylic acid.…”

Green Synthesis, Characterization, and Evaluation of the Antimicrobial Properties and Compressive Strength of Hydroxyapatite Nanoparticle-Incorporated Glass Ionomer Cement

“…The integration of nHA particles into the GIC was carried out by adding powdered nHA at varying weight percentages 3%, 5%, and 10%, respectively. The powdered mixture, consisting of conventional GIC powder and nHA, was placed in Eppendorf tubes and vigorously mixed for one minute using a vortex machine, which is a standard mixing technique [ 18 ]. Following this, the powdered blend was combined with the liquid component of the GIC according to the prescribed powder/liquid ratio specified by the manufacturer.…”

Green Synthesis and Investigation of Antimicrobial Activity and Compressive Resilience of Glass Ionomer Cement Modified With Zirconia Nanoparticles: An In Vitro Study

“…The GIC was infused with zirconia nanoparticles at concentrations of 3% (Group I), 5% (Group II), and 10% (Group III), with conventional GIC serving as the control in Group IV. The combination of conventional GIC powder and zirconia nanoparticles was thoroughly blended using a vortex machine, following established mixing protocols [ 10 ]. Following this, the powdered mixture was mixed with the liquid component of the GIC according to the recommended powder-to-liquid ratio provided by the manufacturer.…”