Sedation dentistry involves the use of sedatives or anesthesia to relax a patient before a dental procedure is performed. Patients who have moderate to severe anxiety can benefit from sedation dentistry because it allows them to remain calm for longer periods of time, giving the dentist the time he needs to complete more complex procedures. There are several types of sedation that can be used. Mild sedation can be received through oral medications. For patients who have higher levels of anxiety, intravenous forms of anesthesia can be used to put the patient in a semi-conscious state or allow them to sleep through the procedure.