[Comparison of craniofacial skeletal structures in adult high-angle and low-angle facial skeletal types].
OBJECTIVE
The purpose of this study was to compare the differences of craniofacial characteristics of adult high-angle and low-angle facial skeletal types.


METHODS
The subjects consisted of 37 yellow race adults (17 high-angle, 20 low-angle). Fifty-three items of cephlometic radiographs were analyzed.


RESULTS
The angle of N-S-Ar and N-S-Ba, the distance of Ptm-A, Co-Go, Po-NB, and S-Go, and the thickness of the mandibular symphysis in high-angle group were smaller than these in low-angle group. The angles of SN-OP, FH-OP, PP-OP, SN-MP, FH-MP, PP-MP, S-Ar-Go, mandibular angle(Ar-Go-Me), Y-angel and SUM, the distance of S-Co, N-Me, and ANS-Me in high-angle group were greater than these in low-angle group. The index of FHI, N-ANS/N-Me, and N-ANS/ANS-Me were smaller, and ANS-Me/N-Me larger in high-angle group. Although the means of Go-Po and FH-RP were smaller in high angle group, but no statistical difference were found.


CONCLUSIONS
The craniofacial morphology of adult high-angle and low-angle facial skeletal types demonstrated significant differences, especially in lower facial form.
Zhao
Zhihe
Z
Department of Orthodontics, West China College of Stomatology, Sichuan University, Chengdu 610041, China.
Xiao
Danna
D
Gao
Hui
H
D000293:Adolescent; D000328:Adult; D044466:Asian People; D002508:Cephalometry; D003766:Dental Occlusion; D005147:Facial Bones / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008297:Male; D008437:Maxilla / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D011859:Radiography; D012016:Reference Values; D012886:Skull / Q000033:anatomy & histology* / Q000000981:diagnostic imaging