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J Forensic Sci. 2012 May;57(3):679-82. doi: 10.1111/j.1556-4029.2011.02035.x. Epub 2011 Dec 28.

Bone age assessment: the applicability of the Greulich-Pyle method in eastern Turkish children.

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Department of Pedodontics, Erciyes University, Kayseri, Turkey.


The aim of this study was to investigate whether or not the Greulich-Pyle (GP) method is adequate for Turkish children. A group of 767 individuals (425 girls and 342 boys) between 7 and 17 years were studied. Bone age (BA) from plain radiographs of left hands and wrists by GP standards was estimated. The total mean differences between BA and chronological age (CA) for girls and boys were found to be 0.20 and -0.13 years, respectively. There were significant differences between BA and CA in age groups 7-, 8-, 10-, 11-, 12-, 13-, 15-, and 16-year-olds for girls and 7-, 10-, and 12-year-olds for boys. The results of this study suggest that the mean differences between BA and CA are low enough to be of no practical significance, and thus, for the time being unless any other methods will be proved more useful, this method could be used in all age groups.

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