A rechargeable coating with temporal-sequence antibacterial activity and soft tissue sealing.

Area of Science:

• Biomaterials Science
• Infectious Disease Research
• Tissue Engineering

Background:

• Transcutaneous implants face bacterial invasion and poor soft tissue sealing.
• Conventional antibacterial methods risk tissue damage from excessive bactericidal agents.

Purpose of the Study:

• To develop a rechargeable implant material for regulated bacterial killing and soft tissue sealing.
• To address the limitations of traditional antibacterial strategies in implantology.

Main Methods:

• A novel rechargeable model (HPI-Ti) was fabricated using perylene polyimide, an aqueous battery material.
• The material's charge storage and chemical discharge properties were investigated in physiological environments.
• Antibacterial efficacy and soft tissue compatibility were assessed both in vitro and in vivo.

Main Results:

• HPI-Ti exhibited a 99.96% antibacterial rate for 24 hours, preventing biofilm formation via electron transfer.
• The material supported fibroblast proliferation in later discharge stages, promoting soft tissue healing.
• Antibacterial activity was successfully restored through recharging, demonstrating its rechargeable nature.

Conclusions:

• The charge-transfer-based HPI-Ti model effectively reconciles potent antibacterial activity with enhanced tissue compatibility.
• This rechargeable system presents a promising strategy for improving transcutaneous implant performance and patient outcomes.