Future Development
Continuous investment in research and development (R&D) is integral to our startup to explore other fracture types’ anatomic external fixators.
About existing products, the future plans are:
The related articles are:
- Complete characterization of sol–gel silver-fluoride-hydroxyapatite coatings on external fixators for orthopedic surgery applications: structural, biological, and in vitro evaluations
- Different methods of hydroxyapatite‐based coatings on external fixator pin with high adhesion approach
Link: https://onlinelibrary.wiley.com/doi/abs/10.1002/ppap.202200219
- Review on Hydroxyapatite-Based Coatings as Antibiotic Delivery System on Bone Graft Substitution for Controlling Infection in Orthopedic Surgery
Link: https://link.springer.com/article/10.1007/s10924-023-03012-8
Antibacterial Coating for Schanz Screws and Pins
In the orthopedic field, Schanz Screws and pins play a crucial role in external fixators, which are used to secure and stabilize bones during the healing process. However, infection remains a significant challenge, often leading to the loosening of these essential components. This infection typically occurs due to the formation of biofilms on the surface of external fixator (EF) pins, where planktonic bacteria adhere and proliferate, compromising the fixation.
To address this issue, we are developing an advanced antibacterial coating for Schanz Screws and pins, aimed at preventing biofilm formation and reducing infection risks.
Our innovative approach focuses on coating these components with Silver-Fluoride Hydroxyapatite (Ag-FHA) on stainless steel substrates. This coating has been identified as the most effective method to improve the interface between the bone and EF, thereby enhancing the overall stability and longevity of the fixators.
Technical Process
Our previous experience has shown that coating the surfaces of EF pins with antibacterial materials can significantly mitigate infection risks. The process involves several meticulous steps to ensure a robust and effective coating:
- Mechanical Polishing: All stainless steel substrates undergo mechanical polishing using silicon carbide (SiC) papers ranging from 80 to 800 grit.
- Ultrasonic Cleaning: The samples are thoroughly cleaned in acetone and distilled water (dH2O) for 30 minutes each using ultrasound.
- Alkali Treatment: The substrates are then immersed in a 5M sodium hydroxide (NaOH) solution at 60°C for 1 hour.
- Dip Coating: Using a dip coating machine, the substrates are dipped into the sol solution at a controlled speed of 30 mm/min.
- Drying Process: The coated samples are dried at 100°C for 10 minutes, followed by further drying at 600°C for 1 hour. This coating, deposition, and drying process is repeated three times to ensure uniform coverage and adhesion.
Applications and Benefits
Schanz Screws and pins come in various types, lengths, and diameters, including self-tapping, self-drilling, and tapered threaded variants. These components are integral to external fixation systems and are often used in conjunction with other internal fixation devices for treating fractures, especially in small bones like those in the hands and feet.
The antibacterial coating we are developing promises several benefits:
- Enhanced Infection Control: By preventing biofilm formation, the coating significantly reduces the risk of infections.
- Improved Fixation Stability: The enhanced interface between bone and EF improves the stability and longevity of the fixator.
- Versatility: The coating can be applied to various types and sizes of Schanz Screws and pins, making it a versatile solution for different orthopedic applications.
Stay tuned for more updates on this promising development in antibacterial coatings for Schanz Screws and pins.
