Korean J Orthod.  1975 Dec;5(1):57-63.

Roentgenocephalometric study on the teeth and skull

• Son BH

Abstract

For the purposes of augmentation of the aid for case analysis and diagnosis of malocclusion, a roentgenocephalometric study was made from 84 Korean adolescences. The Subjects consist of 42 males and 42 females aged from 17 to 20 years with normal occlusion and acceptable facial appearance. The author measured 18 angles and 14 linear distances as suggested by Jarabak. The following results were obtained. 1) Each linear measurement of the males' skull was greaten than that of the females. 2) The posterior to anterior facial height was 69.2% in the males and 67.1% in the females. 3) In the relationship of upper lip to esthetic line, the lip of females was more behind than that of males. 4) Saddle angle was 124.7degrees, articular angle was 148.7degrees, genial angle was 119.4degrees and upper and lower genial angles were 45.1degrees(N-Go-adegrees) and 74.2degrees(N-Go-Medegrees). 5) The ratio of mandibular body to anterior cranial base was about 1:1. 1. 6) The angulations of SNAdegrees, SNBdegrees and SNPdegrees were as follows; SNAdegrees, 80.3degrees, SNBdegrees, 79.8degrees, SNPdegrees, 81.1degrees. 7) The angle of the sella-nasion plane to the mandibular plane (SNGdegreesMedegrees) was 32.0degrees and that of the occlusal plane to the mandibular plane was 18.2degrees. 8) The angle of the maxillary central incisor to the sellanasion plane (1-SNdegrees) was 105.6degrees. That of the mandibular central incisor to the mandibular plane (1-GoMedegrees) was 94.0degrees, and the interincisal angle (1 to 1degrees) was 127.6degrees. 9) The linear distance from incisal edge of upper central incisor to facial plane was 8.0mm and that of lower central incisor was 4.6mm. 10) In the relationship of the lower lip to the esthetic line, the lower lip was 0.2mm front of the esthetic line.

MeSH Terms

Dental Occlusion
Diagnosis
Female
Humans
Incisor
Lip
Male
Malocclusion
Skull Base
Skull*
Tooth*