Background: Panoramic radiography is a two-dimensional dental x-ray that captures the entire mouth in a single image, including the teeth, upper and lower jaws, surrounding structures and tissues. The study was conducted to report the various findings on panoramic radiographs archives of retrospective data. Materials and Method: This study was conducted in the department of Oral Medicine & Radiology in Meenakshi Ammal Dental College & Hospital during the period August 2016 to September 2017. It included panoramic radiographs of 2000 patient images obtained for various reasons. Patient’s information such as name, age, gender, indication of OPG was recorded. All images which were of no diagnostic value and faulty were excluded from the study. All images were taken with single digital Sirona OPG machine and were statistically analysed with Chi square test using SPSS software version 22.0. Results: In the spectrum of our OPG radiographic study, the various common findings in the 2000 radiographs are periodontitis with 21.05%, impacted mandibular 3rd molar bilaterally with 14.95%, periapical abscess with 8.30 %, impacted mandibular 3rd molar unilaterally with 6.80%, pulp stone with 5.60% , styloid elongation – unilateral in 5.25%, microdontia and maxillary 3rd molar bilaterally with 5% , root dilacerations with 4.45%, TMJ degeneration with 3.40% and maxillary 3rd molar unilaterally with 3.35% . Out of 2000 radiographs, incidental findings were seen in 973 radiographs with 48.65%. The most common incidental findings are periodontitis 25.28%, pulp stone 22.30%, impacted mandibular 3rd molars bilaterally 17.99%, TMJ degeneration with 10.79% , microdontia 10.27%, impacted mandibular molar unilateral 10.07%, root dilacerations 9.54%, periapical abscess 9.45%, impacted maxillary molars bilaterally 7.39%, styloid elongation bilateral 4.93%, calcified carotid arteries 4.93%, Odontomes 4.32%, impacted maxillary molars unilateral 4.01%, styloid elongation unilateral 3.59%, dense bone islands of 3.08% , cement osseous dysplasia 2.87% , maxillary sinus thickening of 1.54%, external root resorption and other impacted teeth with 1.43%, supernumerary impacted teeth 1.33%, macrodontia and maxillary canine impaction with 1.23%, mandibular canine impaction 1.13%, and antrolith with 0.61% and internal root resorption with 0.20%. Conclusion: Panoramic radiograph is a preferred routine diagnostic tool for the evaluation of fractures, impacted teeth, full mouth rehabilitation, large lesions, cysts, tumors etc. The additional advantage is incidental findings which may remain undetected if radiographer does not concentrates on keen interpretation.
