Functionalization of TiO₂ for Better Performance as Orthopedic Implants

Area of Science:

• Biomaterials Science
• Orthopedic Surgery
• Nanotechnology

Background:

• Orthopedic implant failure is often caused by bacterial infections and poor osseointegration.
• Titanium dioxide (TiO2), the native oxide of titanium (Ti), offers biocompatibility and unique properties for implant functionalization.
• Effective strategies are needed to simultaneously address infection and promote bone healing at implant sites.

Purpose of the Study:

• To review surface functionalization strategies for TiO2 on Ti-based orthopedic implants.
• To explore methods that prevent bacterial infections and enhance osteointegration.
• To summarize recent advancements in modifying TiO2 for improved implant performance.

Main Methods:

• Review of literature on TiO2 surface modifications for orthopedic implants.
• Analysis of functionalization approaches including topology, drug loading, and element incorporation.
• Examination of advanced techniques like electron transfer and electrical tuning.

Main Results:

• TiO2 nanostructures and properties enable diverse functionalization methods.
• Surface modifications can effectively combat microorganisms and promote osteogenesis.
• Various approaches, including topological, chemical, and electrical tuning, enhance TiO2's bioactivity.

Conclusions:

• Functionalizing TiO2 on Ti implants offers a dual approach to combat infection and promote bone growth.
• Advanced TiO2 modifications significantly improve the bactericidal and osteogenic capabilities of orthopedic implants.
• These strategies hold promise for reducing implant failure rates and improving patient recovery.