Related Experiment Video
Updated: Jun 27, 2026
A Novel Method to Determine the Longitudinal Antibacterial Activity of Drug-Eluting Materials
Published on: March 3, 2023
Controlled release of vancomycin from thin sol-gel films on implant surfaces successfully controls osteomyelitis
Christopher S Adams1, Valentin Antoci, Gerald Harrison
1Department of Orthopaedic Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania, USA. Christopher.Adams@jefferson.edu
Abstract:
Peri-prosthetic infection remains a serious complication of joint replacement surgery. Herein, we demonstrate that a vancomycin-containing sol-gel film on Ti alloy rods can successfully treat bacterial infections in an animal model. The vancomycin-containing sol-gel films exhibited predictable release kinetics, while significantly inhibiting S. aureus adhesion. When evaluated in a rat osteomyelitis model, microbiological analysis indicated that the vancomycin-containing sol-gel film caused a profound decrease in S. aureus number. Radiologically, while the control side showed extensive bone degradation, including abscesses and an extensive periosteal reaction, rods coated with the vancomycin-containing sol-gel film resulted in minimal signs of infection. MicroCT analysis confirmed the radiological results, while demonstrating that the vancomycin-containing sol-gel film significantly protected dense bone from resorption and minimized remodeling. These results clearly demonstrate that this novel thin sol-gel technology can be used for the targeted delivery of antibiotics for the treatment of periprosthetic as well as other bone infections.
Insights
A novel vancomycin-containing sol-gel film effectively treats bone infections in an animal model. This targeted antibiotic delivery system protects bone from degradation and minimizes infection signs, offering a promising solution for periprosthetic infections.
Area of Science:
- Biomaterials Science
- Infectious Disease Research
- Orthopedic Surgery
Background:
- Periprosthetic joint infections are a significant complication following joint replacement surgery.
- Current treatment options for bone infections can be limited and invasive.
Purpose of the Study:
- To evaluate the efficacy of a vancomycin-containing sol-gel film for treating bacterial bone infections.
- To assess the antibiotic release kinetics and anti-adhesion properties of the sol-gel film.
- To investigate the protective effects of the coated implants against bone degradation in an animal model.
Main Methods:
- Development of vancomycin-loaded sol-gel films coated onto titanium alloy rods.
- In vitro assessment of drug release kinetics and Staphylococcus aureus adhesion.
- In vivo evaluation in a rat osteomyelitis model, including microbiological, radiological, and microCT analyses.
Main Results:
- The vancomycin-containing sol-gel films demonstrated predictable drug release and inhibited S. aureus adhesion.
- Microbiological analysis showed a significant reduction in bacterial load in the treated group.
- Radiological and microCT imaging revealed that the sol-gel coating protected bone from degradation, resorption, and remodeling compared to controls.
Conclusions:
- Vancomycin-containing sol-gel films represent a novel technology for targeted antibiotic delivery.
- This approach is effective in treating bacterial bone infections and preventing implant-associated complications.
- The sol-gel technology shows potential for managing periprosthetic and other bone infections.
