Microrobotics for Precision Biofilm Diagnostics and Treatment

Area of Science:

• Nanotechnology
• Biomedical Engineering
• Materials Science

Background:

• Small-scale robotics and nanotechnology enable novel diagnostic and therapeutic strategies.
• Iron oxide nanoparticles (NPs) offer unique magnetic and catalytic properties for microrobot development.

Purpose of the Study:

• To design and demonstrate microrobotic platforms for tetherless biofilm treatment and retrieval.
• To utilize dual catalytic-magnetic iron oxide NPs as building blocks for microrobots.

Main Methods:

• Assembly of NPs into magnetic microswarms for biofilm disruption and sample retrieval.
• Fabrication of 3D micromolded soft helicoids with embedded catalytic-magnetic NPs for radiographic visualization and magnetic control.
• In vitro testing within a root canal model to assess biofilm removal and guided navigation.

Main Results:

• Two distinct microrobotic platforms were successfully designed and tested.
• Microswarms effectively disrupted and retrieved biofilm samples.
• 3D soft helicoid microrobots were visualized and magnetically controlled within a root canal, removing biofilms with microscale precision.

Conclusions:

• Microrobots based on catalytic-magnetic iron oxide NPs provide a viable solution for tetherless biofilm management.
• The demonstrated technology can be adapted for targeted therapies in various anatomical spaces.
• This approach offers automated and precise treatment in difficult-to-reach areas.