Özet:

Purpose: The purpose of this article is to discuss the reliability and availability of the Demirjian method used in the calculation of the age of the tooth by evaluating the development of the tooth using data from different countries. Tools and Methods: In different countries or in different regions of the same country, the data of 22 studies, which were conducted in the age range of 7-11 years, were determined by the Demirjian method. The criterion of inclusion in the studies was determined as being done on healthy children, the use of panoramic film, the study of seven lower left mandibular teeth. The data of girls and boys aged 7-11 years, the chronological age and the data of the tooth age determined by the Demirjian method were edited in the table and the differences between the tooth age and the chronological age were assessed. The data analysis followed the variance analysis in the factorial order and the Bonferroni test was used for multiple comparisons. The first type of error was fixed at 0.05 (α=0.05). The findings: The results of the evaluations found that the age and chronological age determined by the Demirjian method distinguished between the children living in different regions of the same community and from the community to the chronological age. Examples taken from the Netherlands, Turkey, Sudan, China, Serbia, Italy, Pakistan, New Zealand, Bosnia and Herzegovina, Malaysia and India have found negative or positive differences in terms of the availability of the Demirjian method. The difference between the results of Romanian, Iranian, Belgian children living in India and the other communities that were studied was not meaningful. The result: Growth and development in children; heredity, gender, hormones, nutrition, socio-cultural and environmental factors, the diseases that are experienced, show differences from individual to individual and from society to society. The development of the teeth is also under the influence of similar factors and therefore the score system developed by Demirjian for the purpose of determining the teeth age of children of French-Canadian (French-Canadian) when applied to different communities can see significant differences between chronological age and teeth age. To eliminate this difference, the method needs to be used by modifying it according to social characteristics.

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