Natural head position is a reproducible position of a head when it is in an upright position, with eyes looking straight at a mark.[1] The concept was introduced into the field of orthodontics in the late 1950s by Moorrees and Kean.[2] A horizontal line related to the natural head position has been recommended as the most reliable plane to study cephalometric analysis.[3]
^"Radiographic Cephalometry: From Basics to 3-D Imaging, Second Edition (Book/CD-ROM set)". www.quintpub.com. Retrieved 2017-11-21.
^"Natural head position, a basic consideration in the interpretation of cephalometric radiographs: By Coenraad F. A. Moorrees and Martin R. Kean. Am. J. Phys. Anthropol.16: 213–234, June 1958". American Journal of Orthodontics. 45 (10): 785–791. 1959-10-01. doi:10.1016/0002-9416(59)90124-1.
^Lundström, Anders; Lundström, Fredrik (May 1, 1995). "The Frankfort horizontal as a basis for cephalometric analysis". American Journal of Orthodontics and Dentofacial Orthopedics. 107 (5): 537–540. doi:10.1016/S0889-5406(95)70121-4.
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