Korean J Orthod.  1987 Mar;17(1):55-62.

A cephalometric study of the natural head position according to craniofacial morphology

• Kim HJ
• Ryu YK

Abstract

Diagnosis and treatment plans of patients are depended on cephalogram in most case. How?ever, conventional cephalogram may change diagnosis because it ignores a conception of natural head position. The purpose of this study was to investigate the difference of head positions between conventional X-ray taking and x-ray taking in natural head position, and correlation between above results and craniofacial morphology 60 male students in dental college, Yonsei Univ were selected, and every cephalogram is studied by comparison of the change of head position. The results are as follows 1. When taking X-ray by using conventional method, external auditary meatus FH was more tilted than ear rod FH by 21degrees +/-1.8 in forward and downward direction. 2. As facial form becomes concave, natural head position and head position, appeared in X-ray taking by using conventional method, become more similar. 3. Change in head positron had showed high correlations with facial form (N-A-Pog angle), and there was high significance to concave group when compared with average group, but significance to convex group was not found. 4. Multiple-regression equation concerning change of head position was solved deltaFH = 24.5 + 0.31 NAPog + 0.43 Prominence of Chin + 0.13 Facial length -0.32 Anterior facial height.

MeSH Terms

Chin
Diagnosis
Ear
Electrons
Fertilization
Head*
Humans
Male