A comparative study of panorex and periapical radiographs for evaluating caries and periodontal disease.

Since large lesions were detected easily in both methods, it is felt that for longitudinal studies of periodontal disease in large populations the panorex with two posterior bite-wing films has the following advantages: 1. Allows recording of the entire dentition, alveolar bone continuity and surrounding structures, beyond comparison with the periapical technique. 2. Has fixed head position and alignment factors which facilitate standardization. 3. Simplicity of operation requiring minimal time and effort. 4. Low radiation exposure.