Dental anesthesia is a medical technique used to prevent pain during dental procedures. It works by blocking nerve signals in a specific area of the mouth, allowing patients to undergo treatments like fillings, extractions, or cleanings without discomfort. There are different types of dental anesthesia, including local anesthesia, which numbs a small area, and sedation anesthesia, which helps patients relax. Dentists choose the appropriate type based on the procedure and the patient's needs, ensuring a more comfortable experience during dental visits.