Hierarchical Peptide Functionalized Titania Nanotubes: Improving Stability, Promoting Osteogenesis, and Reducing...

Area of Science:

• Biomaterials Science
• Surface Engineering
• Tissue Engineering

Background:

• Titanium implants are widely used in orthopedics and dentistry.
• Enhancing implant biocompatibility and preventing infection are critical challenges.
• Surface functionalization strategies are key to improving implant performance.

Purpose of the Study:

• To develop a hierarchical surface functionalization strategy for titanium.
• To combine titania nanotube engineering with dual-mode peptide functionalization.
• To create a bioactive surface promoting osseointegration and reducing bacterial adhesion.

Main Methods:

• Engineering of titania nanotubes (TiNTs) on titanium surfaces.
• Covalent anchoring of Fmoc-FF-OH dipeptide onto TiNTs.
• Physical deposition of self-assembling FF dipeptide for a secondary layer.

Main Results:

• The functionalized surface demonstrated superior biocompatibility and promoted stem cell adhesion, proliferation, and osteogenic differentiation.
• The nanotubular topography and peptide cues mimicked the extracellular matrix.
• A significant reduction in bacterial adhesion and early biofilm formation was observed compared to unmodified titanium.

Conclusions:

• The hierarchical surface functionalization strategy offers a promising approach for next-generation titanium biomedical devices.
• This multifunctional surface enhances implant osseointegration.
• The strategy effectively prevents implant-associated infections.