Job Description Responsible for assisting dentists during examination and treatment of patients. Maintains equipment, supplies, operatory area(s), and delivery of quality dental services.Prepares patient, sterilizes and disinfects instruments, sets up instrument trays, and prepares materials.Takes and records medical and dental histories and vital signs of patient.Exposes dental diagnostic x-rays. Makes preliminary impressions for study casts and occlusal registrations for mounting study casts.Pours, trims, and polishes study casts, fabricates custom impression trays from preliminary impressio