In dentistry, local anaesthesia is often necessary in order to be able to treat patients. Local anaesthesia facilitates a painless treatment, so that the patient’s comfort is maximal during the treatment and so that the dentist is able to work calmly, with concentration and precision. This benefits the end result and the way this is achieved. Local anaesthesia is also used for diagnostic purposes to identify the cause of pain in the face, using selective anaesthesia. It is also used to prevent short- or long-term postoperative pain.