Introduction
Researchers at the Indian Institute of Science (IISc) and the IISc-incubated startup Theranautilus have developed nano-sized robots that can be manipulated using a magnetic field to kill bacteria deep inside dentinal tubules, potentially boosting the success of root canal treatments.
The Challenge in Root Canal Treatments
Root canal treatments are commonly performed to treat tooth infections by removing the infected pulp and flushing the tooth with antibiotics or chemicals. However, these treatments often fail to eliminate all bacteria, especially antibiotic-resistant strains like Enterococcus faecalis, which reside deep within microscopic canals called dentinal tubules.
Innovative Nanobot Solution
In the study published in Advanced Healthcare Materials, researchers designed helical nanobots made of silicon dioxide coated with iron. These nanobots can be controlled using a device that generates a low-intensity magnetic field. When injected into extracted tooth samples, their movement was tracked using a microscope.
Controlled Movement and Bacterial Elimination
By adjusting the frequency of the magnetic field, researchers were able to direct the nanobots to penetrate deep into the dentinal tubules. Importantly, they could also retrieve the nanobots after the procedure. The magnetic field was further manipulated to make the surface of the nanobots generate heat, effectively killing nearby bacteria.
Advantages Over Traditional Methods
Traditional methods like ultrasound or laser pulses create shockwaves to flush out bacteria but can only penetrate up to 800 micrometers, with energy dissipating quickly. In contrast, the nanobots achieved penetration depths of up to 2,000 micrometers. Using heat to kill bacteria also offers a safer alternative to harsh chemicals or antibiotics.
Conclusion
This innovative approach using magnetically controlled nanobots presents a promising advancement in root canal treatments, offering deeper penetration and effective elimination of bacteria, potentially reducing treatment failures and improving patient outcomes.