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Multifunctional Prosthesis Surface: Modification of Titanium with Cinnamaldehyde-Loaded Hierarchical Titanium Dioxide

Yi Mao1, Xinru Xie1, Guangxin Sun2

  • 1Department of Oral Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai, 200011, China.

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Summary

This study developed a titanium dioxide nanotube system with cinnamaldehyde to improve orthopedic implants. The new surface modification enhances bone integration and provides antibacterial and anti-inflammatory effects.

Keywords:
antibacterialsanti‐inflammatory materialsbone osseointegrationosteoclastogenesistitanium implants

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Area of Science:

  • Biomaterials Engineering
  • Orthopedic Surgery
  • Nanotechnology

Background:

  • Orthopedic prostheses are crucial for end-stage conditions but face complications like aseptic loosening and infection.
  • Titanium implants are widely used, but surface modifications are needed to improve integration and combat complications.

Purpose of the Study:

  • To develop a hierarchical titanium dioxide (TiO2) nanotube drug delivery system for surface modification of titanium implants.
  • To load cinnamaldehyde into TiO2 nanotubes to enhance implant performance, including bone integration, anti-inflammatory, and antibacterial properties.

Main Methods:

  • Constructed a dual-layer TiO2 nanotube system on titanium implants.
  • Loaded the nanotubes with cinnamaldehyde.
  • Conducted in vitro studies on osteogenesis, osteoclast formation, inflammation, and bacterial proliferation (Staphylococcus aureus, Escherichia coli).
  • Performed in vivo experiments using rat models for bone integration and subcutaneous implant evaluation.

Main Results:

  • The TiO2 nanotube system with cinnamaldehyde enhanced material reactivity and drug loading.
  • In vitro tests showed promotion of osteogenesis via Wnt/β-catenin and MAPK pathways, inhibition of osteoclast formation, suppressed inflammation, and impeded bacterial growth.
  • In vivo studies demonstrated improved bone integration in femoral defects and enhanced antibacterial and anti-inflammatory effects.

Conclusions:

  • The developed TiO2 nanotube drug delivery system with cinnamaldehyde is a promising surface modification for orthopedic titanium implants.
  • This strategy effectively enhances bone integration, exhibits anti-inflammatory and antibacterial properties, and addresses key complications of orthopedic devices.