Dentists use radiographs to diagnose and observe whether the oral structures have pathological changes. This can be performed using the traditional conventional x-rays or the more modern digital imaging. Usually, a full mouth of periapical x-rays is taken when a patient is new to the dental office as a baseline and bitewing x-rays recommended to be taken every year as part of the yearly examination to monitor the progress of tooth growth as well as abnormal changes in the teeth and surrounding oral structures, if there are any. Panoramic x-rays and cephalometric x-rays can also be used to assist with diagnosing and measuring specific landmarks for treatment planning, usually in oral surgery and orthodontic procedures. When a tooth has active symptoms of pain or sensitivity, radiographs are also a part of the armamentarium to diagnose what is wrong.