A research team at Poznań University of Technology has developed a titanium implant modified with a polyphenol layer and zinc ions to release antibiotics, preventing bacterial biofilm formation after orthopedic and dental procedures.
A Novel Defense Against Infections
A research team led by Prof. Mariusz Sandomierski from the Institute of Chemical Technology and Engineering at the Poznań University of Technology has created a new type of dental and orthopedic implant. The invention, titled “Modified titanium material with a zinc-doped polyphenol layer for orthopedic and dental use,” is a nominee in the “Eureka! Discovering Polish Inventions” competition held by Dziennik Gazeta Prawna.
Preventing Biofilm Formation
Prof. Sandomierski highlights that post-implant infections are a significant clinical problem. The goal is to make surgeries safer by modifying the implant surface with antibiotics. This modification prevents the formation of a biofilm—a layer of bacteria that is notoriously difficult to eradicate once it develops.
The Role of Zinc as a Binding Agent
The manufacturing process involves creating a polyphenol layer on the titanium surface, which acts as a base for the antibiotic. Zinc ions are introduced to act as a bridge between the polyphenol coating and the medication, coordinating with both to ensure stability. The researcher compares the process to the dark residue that forms on a mug left with tea for an extended period.
Controlled Medication Release
For the antibiotic to reach the body, the zinc is released first, facilitating the prolonged release of the medication itself. During testing, the team measured the release of the antibiotic for approximately 80 hours, noting that it likely continued beyond the detection capabilities of their current laboratory equipment.
Future Development and Adaptability
While the current entry for the competition focuses on one specific drug, the research team is working on other patents incorporating additional antibiotics and active substances that support bone growth. The team is currently seeking funding to scale the production of various types of specialized implants.