Perovskite ceramic nanoparticles in polymer composites for augmenting bone tissue regeneration

Area of Science:

• Biomaterials Science
• Nanotechnology
• Orthopaedic Engineering

Background:

• Increasing interest in polymer nanocomposites for orthopaedic biomaterials.
• Need for materials mimicking bone's mechanical, chemical, and electrical properties.

Purpose of the Study:

• Prepare poly(ϵ-caprolactone) (PCL) nanocomposites with calcium titanate (CT), strontium titanate (ST), and barium titanate (BT) nanoparticles.
• Evaluate their potential for bone tissue engineering scaffolds.

Main Methods:

• Fabrication of PCL nanocomposites with perovskite nanoparticles.
• Mechanical testing (tensile strength, modulus).
• Scanning electron microscopy (SEM) for nanoparticle dispersion.
• Dielectric spectroscopy for electrical properties.
• Electrospinning for scaffold fabrication.
• In vitro cell culture studies (osteoblast proliferation and gene expression).

Main Results:

• Increased tensile strength and modulus with nanoparticle addition.
• Nanoparticle dispersion influenced mechanical property enhancement.
• Improved permittivity and reduced dielectric losses in composites.
• Scaffolds supported osteoblast proliferation.
• Enhanced osteogenic gene expression in the order PCL/CT > PCL/ST > PCL/BT > PCL.

Conclusions:

• Perovskite nanoparticles improve PCL composite properties for orthopaedic applications.
• Nanocomposites show promise for developing advanced bone tissue engineering scaffolds.
• The choice of perovskite nanoparticle influences osteogenic gene expression.