Synthesis of nano HA/βTCP mesoporous particles using a simple modification in granulation method

Area of Science:

• Materials Science
• Biomaterials Engineering
• Nanotechnology

Background:

• Hydroxyapatite/beta-tricalcium phosphate (HA/βTCP) are crucial biomaterials for bone regeneration.
• Developing porous nano-powders with enhanced properties is essential for improved clinical applications.
• Controlling particle crystallization and surface characteristics is key to optimizing biomaterial performance.

Purpose of the Study:

• To synthesize HA/βTCP porous nano-powders using a granulation method.
• To investigate the effects of polymeric substrates, drying, and heat treatment on nano-powder crystallization.
• To improve surface charge, cell growth, and cell adhesion properties through chemical surface modification.

Main Methods:

• Granulation of oil, water, and polymer mixtures to synthesize HA/βTCP nano-powders.
• X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET) analyses for phase composition and surface area.
• Surface modification using tetraethyl orthosilicate (TEOS) and assessment of zeta potential, cell viability, and bone-nodule formation.

Main Results:

• PVA/oil system yielded mesoporous HA/βTCP particles (93 cm²/g); gelatin/oil yielded pure HA (115 cm²/g).
• TEOS modification significantly increased zeta potential (-21 to -42 mV) and enhanced bone-nodule formation by 25%.
• Synthesized and TEOS-modified nano-powders demonstrated no cytotoxicity and improved cell adhesion.

Conclusions:

• The granulation method effectively produced HA/βTCP porous nano-powders with tunable properties.
• Surface modification with TEOS significantly enhanced the osteogenic potential and biocompatibility of the nano-powders.
• These findings highlight the potential of the developed HA/βTCP nano-powders for bone tissue engineering applications.