Dental OPG X-Ray
It is a special X-Ray that provides a picture of all the teeth of both jaws on one film. It provides information regarding the position of wisdom teeth, receding bone levels (which is a sign of periodontal disease), is done before Implant surgery and to assess jaw-joint problems. Dental x-rays use high-speed film, so the amount of radiation exposure is very low.
Pantographic x-ray only adds about as much radiation as you'd get from 10 extra days of natural background radiation. Even if you've recently had other x-rays taken, a Pantographic x-ray does not add to that exposure.
It is a special x-ray on tracings of which anatomic points, planes, and angles are drawn that assist in the evaluation of the patient's facial growth and development.