Related Experiment Video
Updated: Feb 24, 2026
09:56
Fabrication of Mechanically Tunable and Bioactive Metal Scaffolds for Biomedical Applications
Published on: December 8, 2015
11.2K
Two-in-One Biointerfaces-Antimicrobial and Bioactive Nanoporous Gallium Titanate Layers for Titanium Implants
Seiji Yamaguchi1, Shekhar Nath2, Yoko Sugawara3
1Department of Biomedical Sciences, College of Life and Health Sciences, Chubu University; Aichi Prefecture 487-8501, Japan. sy-esi@isc.chubu.ac.jp.
Nanomaterials (Basel, Switzerland)
|August 22, 2017
Summary
Gallium (Ga) ions were successfully incorporated onto titanium (Ti) surfaces, creating a dual-function material. This novel Ti-Ga implant coating exhibits both antimicrobial properties and enhances bone-like apatite formation for better osseointegration.
Area of Science:
- Biomaterials Science
- Surface Chemistry
- Orthopedic and Dental Implants
Background:
- Titanium (Ti) implants are widely used but can benefit from enhanced bioactivity and antimicrobial properties.
- Gallium (Ga) ions are known for their bone resorption inhibitory effects and potent antimicrobial activity.
- Developing implantable devices with dual antimicrobial and bioactive functions is crucial for next-generation hard tissue replacements.
Purpose of the Study:
- To incorporate gallium (Ga) ions onto titanium (Ti) surfaces using cost-effective methods.
- To investigate the apatite formation and ion release characteristics of Ga-modified Ti.
- To evaluate the antimicrobial efficacy and dual functionality of the Ga-incorporated Ti surfaces.
Main Methods:
- Titanium (Ti) samples were treated with NaOH to create a nanostructured sodium hydrogen titanate layer.
- Ti surfaces were soaked in solutions containing CaCl₂ and GaCl₃, followed by heat treatment at 600 °C to form Ga-containing calcium titanate (Ga-CT) or gallium titanate (GT).
- Apatite formation was assessed in simulated body fluid (SBF), ion release was measured in phosphate-buffered saline (PBS), and antibacterial activity against multidrug-resistant Acinetobacter baumannii (MRAB12) was evaluated.
Main Results:
- Ga ions were successfully incorporated into Ti surfaces, forming Ga-CT or GT layers.
- Ti with Ga-CT demonstrated rapid bone-like apatite formation in SBF and low Ga ion release in PBS.
- Ti with GT showed no apatite formation but higher Ga ion release; subsequent hot water treatment enhanced apatite formation and Ga release.
- The treated Ti surfaces exhibited significant antibacterial activity against MRAB12.
Conclusions:
- Ga-modified Ti surfaces offer a unique combination of antimicrobial and bioactive properties, essential for advanced implants.
- The developed Ga-CT and GT interfaces show potential for inhibiting bone resorption and promoting osseointegration.
- This dual-function biointerface represents a significant advance with broad translational potential for orthopedic and dental applications.
