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Microrobotics for Precision Biofilm Diagnostics and Treatment.

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  • 1Biofilm Research Laboratories, Center for Innovation & Precision Dentistry, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA.

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Summary

New microrobots utilizing iron oxide nanoparticles offer precise, tetherless biofilm disruption and retrieval. These advanced robotic systems demonstrate potential for targeted therapies in hard-to-reach areas.

Keywords:
antimicrobials/antimicrobial resistancebiofilm(s)diagnostic systemsdrug deliveryendodonticsnanotechnology

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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.