Introduction: Dental caries and periodontal disease are probably the most common oral chronic diseases in worldwide, and their prevalence is progressively increasing from day to day. Therefore, this study was conducted to investigate the relationship between caries and periodontal disease. Methods: In this cross sectional study, 237 panoramic radiographies of patients aged 10 to 65 years (110males and 127 females) were selected utilizing convenience sampling. In order to measure the variables, a graduate caliper with 0/2 mm accuracy and Negatoscope with optimum light were used. Moreover, in order to diagnose the caries and minimize the errors, “calibration” method was selected. Results: There was no significant relationship between crown caries and mean of alveolar bone loss. (p=0/19). As the age increased in patients, the mean of alveolar bone loss also increased and a significant association was detected between the severity of caries, alveolar bone loss and male gender. Conclusion: Generally, no relationship was observed between dental caries and periodontal disease in this study.

Keywords: Bone Loss, Dental Caries, Panoramic Radiography, Periodontal Disease

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