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To creat a preliminary database in accordance with McNamara’s cephalometric analysis on lateral view of 3D CT cephalometric of the population from northeast China. Lateral 3D CT scans from 98 adults with Class I normal occlusal relationship from northeast China were collected. The coordinates of landmark points including the subspinale, supramental, upper incisor, pognion etc, were measured with the Frankfort plane and a vertical straight line though the nasion being the origin of reference. Measurements were taken with respect to effective maxillary and mandibular lengths, middle anterior and anterior face heights, and lower anterior length. The data were then analyzed with the data in McNamara’s cephalometric analysis. Our lateral view of 3D CT based McNamara’s cephalometric data indicate that subspinale locate antierior to the vertical line, but there is no significant difference between male and female. Statistical differences exist between male and female on effective maxillary length, effective mandibular length, 1/3 height of middle face, 1/3 height of lower face and lower face length. The present study built the first preliminary data of McNamara’s cephalometric analysis on lateral view of 3D CT cephalometric of the population from northeast China. These data would be a useful reference for diagnosis and treatment plan of dental facial deformities, however it will take time to accumulate a large sample to establish a representative database.

Norms of McNamara’s Cephalometric Analysis on Lateral View of 3D CT Imaging in Adults from Northeast China