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Niobium-Containing Phosphate Glasses Prepared by the Liquid-Phase Method.

Minori Takahashi¹, Shota Shiraki^2,3, Sungho Lee²

¹Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan.

International Journal of Molecular Sciences

|January 11, 2025

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Niobium-containing phosphate invert glasses (PIGs) synthesized via a liquid-phase method show controlled ion release for bone repair. These flexible, cotton-wool-like scaffolds offer promising biomaterial applications.

Area of Science:

Biomaterials Science
Materials Chemistry
Biotechnology

Background:

Phosphate invert glasses (PIGs) are investigated for bone repair due to their tunable composition.
Niobium (Nb) incorporation in PIGs previously enhanced osteoblast activity and controlled ion release.
A liquid-phase synthesis method offers advantages for glass precursor preparation and shape design.

Purpose of the Study:

To synthesize niobium-containing phosphate invert glasses (Nb-PIGs) using a liquid-phase method.
To investigate the effect of niobium content on the ion release behavior and structural properties of Nb-PIGs.
To fabricate and evaluate Nb-PIGs scaffolds for potential biomaterial applications.

Main Methods:

Liquid-phase synthesis of niobium-containing phosphate invert glasses.

Keywords:

bioactive glasses ion elution liquid-phase method niobium phosphate glasses

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Characterization of glass properties and ion release kinetics in a tris-HCl buffer.

Fabrication of cotton-wool-like scaffolds using a wet-spinning technique.

Main Results:

Nb-PIGs were successfully synthesized with controllable ion release modulated by niobium content.
Niobium's function varied with content, acting as a network modifier/former and inducing chain-like structures in higher concentrations.
The synthesized glasses exhibited gradual ion release.
Cotton-wool-like scaffolds with excellent flexibility were fabricated.

Conclusions:

Niobium-containing phosphate invert glasses prepared via liquid-phase synthesis offer tunable ion release properties.
The fabricated flexible scaffolds demonstrate potential as novel biomaterials for bone repair applications.
Controlled ion release and structural characteristics make these Nb-PIGs promising for advanced biomedical uses.