The treatment starts with the numbing of an infected tooth, for which your dentist will use local anesthesia and other sedation dentistry techniques. In the next step, the tooth is wrapped with a rubber dam to keep it dry from saliva. In addition, your dentist will then drill a hole through the tooth to eliminate any infection, decay, and bacteria from the opening. During your next visit, the infected tooth will be filled with interior dental filling and the exterior hole with a regular dental filling.