Indian researchers have unveiled magnetic nanorobots capable of repairing teeth autonomously, potentially eliminating the need for drilling, fillings, and root canals. Smaller than a human hair, these robots can navigate deep into microscopic tooth structures, seal cracks, kill bacteria, and rebuild enamel with remarkable precision.
The nanobots, dubbed “CalBots,” are being developed at the Indian Institute of Science’s Centre for Nano Science and Engineering (CeNSE). Using magnetic guidance, they traverse the intricate tunnels of teeth and begin restoring enamel from within by deploying calcium-phosphate nanoparticles designed to bond and crystallize like natural tooth material.
Once inside the tooth, the nanobots assemble new mineral layers that integrate seamlessly with existing enamel, forming repairs stronger than conventional synthetic fillings. In trials, CalBots successfully treated erosion, sensitivity lesions, and enamel thinning—conditions traditionally addressed through drilling or invasive procedures.
“CalBots can reach depths of up to 300–500 micrometres inside a sensitive tooth,” explained Prof. Ambarish Ghosh, one of the lead authors of the study published in Advanced Science. “Once they reach their target, the robots clump together and harden, forming a permanent plug that mimics natural enamel. Imaging after just twenty minutes under a magnetic field showed completely sealed tubules with no leaks or gaps.”
Experts believe that, if commercialized, this innovation could transform dental care worldwide, making treatments faster, less invasive, and more affordable, particularly in regions with limited access to dental services. In the future, such nanobots could be activated through simple oral treatments to continuously monitor and maintain dental health.
Prof. Ghosh added, “This is a compelling demonstration of what nanorobotics can achieve and how they could significantly impact future healthcare. We’re excited to see this work progress toward clinical use.”
