Modification of glass ionomer cement by incorporating hydroxyapatite-silica nano-powder composite: Sol–gel synthesis and characterization

• Published in: Ceramics international Vol. 40; no. 2; pp. 3165 - 3170
• Main Authors: Ahmad Shiekh, Rayees, Ab Rahman, Ismail, Malik Masudi, Sam’an, Luddin, Norhayati
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-03-2014
• Subjects: Bearing; Ceramics; Characterization; Glass ionomer cement; Glass ionomer cements; Hydroxyapatite; Nanostructure; Nuclear magnetic resonance; Silica–nanohydroxyapatite; Sol gel process; Sol–gel technique; Synthesis; Characterization; Silica–nanohydroxyapatite; Glass ionomer cement; Sol–gel technique
• ISSN: 0272-8842; 1873-3956
• DOI: 10.1016/j.ceramint.2013.09.127

A nanohydroxyapatite–silica powder was synthesized using an ethanol based sol–gel technique. The synthesized powder was incorporated into commercial glass ionomer powder (Fuji II GC) and characterized using FTIR, 29Si CP/MAS NMR, EDX and XRD spectroscopy. 29Si CP/MAS NMR results showed the presence of higher degree of cross-linking of silyl species between silica and GIC, which makes the Nano-HA–Silica–GIC composite much stronger. High-resolution transmission electron microscopy (TEM) and scanning electron microscopy (TEM) was employed to investigate the morphology of the synthesized powder. Results revealed that higher content of nanosilica produced a denser and stronger GIC. Thus, the application of nanohydroxyapatite–silica–GIC with improved properties are envisioned to be of great clinical importance, especially in stress bearing areas.