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. 2012 Oct 2;2012:145749. doi: 10.1155/2012/145749

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Copyright © 2012 Inger Kjær.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Profile (a) and frontal (b) radiograph of a girl aged 9 years with a single median maxillary central incisor. Different developmental fields are marked on the radiographs. Green: occipital and cervical spine field (Oc). Purple: theka field (T). Light and dark blue: the complete mandibular field (Md). Yellow: frontonasal field (Fn). Red: maxillary field (Mx). Orange: palatal field (P). Note that the sella turcica is a borderline region between fields. This figure is reprinted with permission from European Journal of Orthodontics 2010:32:140-147 [5].