Light-Propelled Nanorobots for Facial Titanium Implants Biofilms Removal

Area of Science:

• Biomaterials Science
• Nanotechnology
• Oral and Maxillofacial Surgery

Background:

• Titanium miniplates are crucial in maxillofacial surgery but susceptible to biofilm infections, leading to inflammation and implant failure.
• Current treatments for infected implants often require removal, highlighting the need for novel therapeutic strategies.
• Bacterial biofilms on medical implants pose a significant clinical challenge, necessitating advanced antimicrobial approaches.

Purpose of the Study:

• To investigate the efficacy of light-driven nanorobots against multispecies bacterial biofilms on titanium miniplates.
• To simulate oral microenvironment conditions and pathogenic challenges relevant to infected maxillofacial implants.
• To evaluate the motion characteristics and biofilm eradication capabilities of novel nanorobots.

Main Methods:

• Utilized self-propelled tubular black-TiO₂ /Ag nanorobots actuated by UV to visible light.
• Analyzed nanorobot motion under different light wavelengths (UV, blue, green).
• Quantified biofilm biomass reduction using LIVE/DEAD fluorescence and digital microscopy after nanorobot treatment.

Main Results:

• Nanorobots demonstrated light-dependent motion, with rotational speed decreasing as light wavelength increased.
• Significant reduction in bacterial biofilm biomass was observed following nanorobot treatment.
• The study confirmed the potential of nanorobots in combating biofilms on titanium implants under simulated oral conditions.

Conclusions:

• Light-driven nanorobots show promise as an effective therapeutic strategy for treating bacterial biofilm infections on titanium miniplates.
• This approach offers a potential alternative to surgical removal of infected implants.
• Further development could lead to advanced treatments for implant-associated infections in oral and maxillofacial surgery.