Ultrasonic cleaners are essential in dental practices for pre-sterilization cleaning of instruments, using high-frequency sound waves (typically 35-45kHz) to generate cavitation bubbles in enzymatic solutions that implode to dislodge blood, tissue, plaque, and debris from crevices without manual scrubbing. Tanks (0.8-10L capacity) hold baskets of tools like scalers, forceps, and burs for 5-15 minute cycles at 40-60°C, boosting efficiency 3x over hand washing while reducing staff exposure to biohazards; models like Codyson or Midmark feature digital timers, heaters, and degas functions. Post-rinse, instruments proceed to autoclaving per CDC protocols.