[A cephalometric investigation on Shanghainese with normal occlusion using Ricketts analysis].
OBJECTIVE
To provide a database for orthodontic diagnosis, treatment planning and treatment evaluation.


METHODS
Cephalograms taken from 121 Shanghainese (57 adolescents and 64 adults) with normal occlusion were traced and examined using Ricketts analysis.


RESULTS
(1) In adolescent group, the angle of mandibular arc and facial contour were larger in male than in female. (2)In adults group, the angle of mandibular arc and genial angle were larger in male than in female, whilst the lower facial height and the convexity of lower incisor were smaller in male than in female. (3) The angle of mandibular arc, the convexity of lower incisor and the position of upper first molar were larger in adults than in adolescents,whilst the convexity of A was smaller in adults than in adolescents.


CONCLUSIONS
In adolescents, the ramus and maxilla grow more in male than in female. In adults, chin and ramus grow more in male than those in female.
Department of Orthodontics, Ninth People's Hospital, School of Stomatology, Shanghai Second Medical University, Shanghai 200011, China.
L
L
Fan
W
W
Chen
G
G
Shen