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The developmental stages of the teeth in the radiographs are graded on an ordinal scale. The present study was conducted using 123 digital orthopantomograms from individuals in the age group of 5 to 22 years and to analyze and evaluate the inter-observer agreement in grading the developmental stages of second and third molars. Four observers with different levels of practical experience in age estimation participated in the study. The development stages of both the molars in the lower left quadrant (3 rd quadrant) were assigned based on the Demirjian's 10 stage chart. The percentage agreement and Kappa statistics were used to test the agreement between the observers. The data of the observer 1 were used as the standard for the comparison.

journal of oral and maxillofacial pathology

Inter-observer agreement in the radiographic interpretation of Demirjian's developmental stages in the mandibular second and third molars – A comparative study