Nanodentistry uses devices and materials at the nanoscale to detect and treat oral cancer. Detection methods include quantum dots and nanowires that can identify cancer signatures. Cantilever arrays can detect cancer antigens much earlier. A nanosensor tests oral fluid for cancer biomarkers. Treatment uses nanocapsules to target drugs, carbon nanotubes that kill cancer with heat, nanorobots that remove early cancer cells, and magnetic nanoparticles that destroy tumors through hypothermia. This novel approach allows for earlier cancer diagnosis and more effective treatment options.