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|  It is also known as Panoramic Radiography or Rotational Radiography. It produces a single image of the facial structures including both maxillary & mandibular arches with their supporting structures and the entire dentures. | 
| Advantages : | |
|  | Broad anatomic region is imaged. | 
|  | Low radiation dose. | 
|  | Convenient, easy and fast. The entire procedure takes 14 seconds expsure time. | 
|  | Procedure can be performed on patients who cannot open their mouth. | 
|  | Easy for edentulous patients, patients who do not tolerate intraoral procedure well, patients with multiple tooth / Oral pathology. | 
|  | No overlapping of facial bones. | 

| Indications : | |
|  | Evaluation of trauma, third molar, extensive pathology. | 
|  | Evaluation of tooth development especially mixed dentation analysis. | 
|  | Evaluation of development anomlies like cleft palate. | 
|  | Minimal fluid inmaxillary sinus can be caught in his X-ray. | 
|  | Temporo mandibular joint pathology, dislocation or fractures can be clearly visualized without overlap. | 
|  | Styloid process visualization is very easily achieved. | 
|  | Multiple dental/oral problems caused by tobacco/Pan masala chewing in elders & Chocolates in children are caught by a single X-ray. | 
|  | Gross localization of Nasal Cavity/Ethomodial sinus/Maxillary sinus tumors & other paathology can be done at a very low price compared to the CT/MRI. | 
| OPG is very useful for following faculties : | |
|  | Dental | 
|  | Fascio Maxillary Surgery | 
|  | Plastic Surgery | 
|  | Cancer Surgery | 
|  | Orthopaedic Surgery | 
|  | ENT Surgery | 
|  | Nursing Home Dealing in Trauma. |