Potentiostatic Implant Control for Biofilm Eradication
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Solution Overview
Problem
Current treatments for orthopedic implant-related biofilm infections, particularly those caused by Staphylococcus aureus and Acinetobacter baumannii, are ineffective due to the high resistance of biofilm-forming bacteria to antimicrobials, leading to recurrent infections and the need for costly revision surgeries.
Innovation Solution
A method involving the use of a potentiostatic device to maintain a constant electric potential on implantable objects, such as titanium or stainless steel surfaces, to inhibit microbial growth by controlling the electrochemical properties and reducing biofilm formation, potentially combined with antimicrobial agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If broad-spectrum systemic antibiotics and revision surgery are used to treat biofilm-associated implant infections, then some infections can be treated, but recurrence of infections is frequently reported and treatment effectiveness is limited due to high bacterial resistance
Solution Approach 1:
The patent replaces chemical antimicrobial agents with an electrical field-based system. A potentiostatic device applies controlled electrical potentials to the implant surface to create electrochemical conditions that eradicate biofilm-forming bacteria. This substitution of electrical fields for chemical antibiotics provides a new mechanism for infection control that overcomes bacterial resistance to traditional antimicrobials.
Solution Approach 2:
The patent changes the physical-chemical parameters of the implant surface by controlling its electrical potential. By maintaining the implant at specific electrochemical potentials, the system creates surface conditions that are inhospitable to biofilm-forming bacteria. This parameter change approach transforms the implant surface properties to actively prevent bacterial adhesion and biofilm formation rather than relying on chemical agents.
2Reliability
If revision surgery with implant removal and debridement is performed, then infected implants can be addressed, but the procedure is costly and requires longer hospital stays
Solution Approach 1:
The patent applies electrochemical treatment to eradicate biofilm infections before revision surgery is required. By continuously or periodically treating the implant surface with controlled electrical potentials, the system prevents biofilm maturation and infection establishment, thereby avoiding the need for costly revision surgeries and extended hospitalizations.
Solution Approach 2:
The implant itself serves as the active treatment element by functioning as an electrode. The implant's electrical properties are utilized to create antimicrobial surface conditions, allowing the device to treat its own associated infections without requiring external surgical intervention or additional therapeutic agents.
3Object-affected harmful factors
If antimicrobial agents are applied to treat biofilm infections, then some bacterial growth can be inhibited, but biofilm-forming bacteria show significantly higher resistance compared to planktonic bacteria
Solution Approach 1:
The patent replaces chemical antimicrobial agents with an electrical field-based system. A potentiostatic device applies controlled electrical potentials to the implant surface to create electrochemical conditions that eradicate biofilm-forming bacteria. This substitution of electrical fields for chemical antibiotics provides a new mechanism for infection control that overcomes bacterial resistance to traditional antimicrobials.
Solution Approach 2:
The patent changes the physical-chemical parameters of the implant surface by controlling its electrical potential. By maintaining the implant at specific electrochemical potentials, the system creates surface conditions that are inhospitable to biofilm-forming bacteria. This parameter change approach transforms the implant surface properties to actively prevent bacterial adhesion and biofilm formation rather than relying on chemical agents.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively reduces or eradicates biofilm-associated microbes on implant surfaces, potentially eliminating the need for antimicrobial agents and reducing the frequency of revision surgeries by preventing biofilm formation and promoting bone healing.
Implementation Method 1
A method involving the use of a potentiostatic device to maintain a constant electric potential on implantable objects, such as titanium or stainless steel surfaces, to inhibit microbial growth by controlling the electrochemical properties
Data Source
AI summary
The disclosure describes a method of reducing or preventing the growth of microbes on the surface of an object, wherein the object is of such material that it can act as a working electrode. The method comprises the steps of providing a counter electrode, and a reference electrode. The object is used as the working electrode. A first electrical current is passed through the working and counter electrodes. The first current through the counter electrode is varied such that a first electric potential of the working electrode is constant relative to the electric potential of the reference electrode. In some embodiments, a second electrical current is passed through the counter electrode such that a second electric potential of the working electrode is constant relative to the electric potential of the reference electrode.