Three-dimensional nanocomposite scaffolds fabricated via selective laser sintering for bone tissue engineering

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Nanotechnology

Background:

• Bionanocomposites combining biodegradable polymers and osteoconductive nanomaterials offer improved properties for bone regeneration.
• Three-dimensional scaffolds are crucial for creating a biomimetic environment for bone tissue engineering.

Purpose of the Study:

• To fabricate and characterize novel 3D nanocomposite scaffolds for bone tissue regeneration.
• To evaluate the in vitro biological performance of calcium phosphate/poly(hydroxybutyrate-co-hydroxyvalerate) and carbonated hydroxyapatite/poly(l-lactic acid) nanocomposite scaffolds.

Main Methods:

• Fabrication of nanocomposite microspheres using selective laser sintering (SLS) rapid prototyping.
• Characterization of scaffold morphology, microstructure, porosity, and mechanical properties.
• In vitro cell culture studies using SaOS-2 cells to assess viability, proliferation, and differentiation.

Main Results:

• Successfully fabricated 3D Ca-P/PHBV and CHAp/PLLA nanocomposite scaffolds with controlled microstructure and interconnected porosity.
• Ca-P/PHBV scaffolds demonstrated significantly enhanced SaOS-2 cell proliferation and alkaline phosphatase activity compared to polymer scaffolds.
• CHAp/PLLA scaffolds showed comparable cell response to PLLA scaffolds, with all scaffolds supporting high cell viability and normal morphology.

Conclusions:

• Nanocomposite scaffolds provide a biomimetic environment conducive to osteoblastic cell functions.
• Ca-P/PHBV nanocomposite scaffolds show significant potential for bone tissue engineering applications due to enhanced biological activity.
• Further development of these nanocomposite materials could advance bone regeneration therapies.