Cephalometric norms of the hard tissues of Korean for orthognathic surgery.
- Author:
Kyung Ho KIM
1
;
Kwang Chul CHOY
;
Hyoung Gon KIM
;
Kwang Ho PARK
Author Information
1. Department of Orthodontics, College of Dentistry, Yonsei University (Yongdong Severance Hospital).
- Publication Type:Original Article
- Keywords:
Hard tissue;
Horizontal reference plane;
Orthognathic surgery
- MeSH:
Adult;
Female;
Humans;
Incisor;
Male;
Molar;
Orthognathic Surgery*;
Tooth, Supernumerary
- From:Journal of the Korean Association of Oral and Maxillofacial Surgeons
2001;27(3):221-230
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
This study was performed to evaluate hard tissue cephalometric norms for Korean adults which can be implemented in surgical orthodontic treatment planning using selected horizontal reference plane especially for Koreans (Male: SN-7.5degreeC, Female: SN-9.0degreeC) and a simplified analytical method. 70 males and 70 females consisting of freshmen of Yonsei University from 1996 to 1997 and students from the Dental College of Yonsei University were chosen according to clinical examination and cephalometric analysis. The samples had normal profiles, normal anteroposterior skeletal relationship(ANB angle of 0degreeC to 4degreeC and Wits appraisal of -4.0mm to 0mm) , and Class I molar and canine relationship. They had no missing or supernumerary teeth and had no experience of orthodontic or prosthetic treatment. After the selection of 23 landmarks and the construction of horizontal and vertical reference lines, 22 skeletal and 12 dental measurements were taken. These consisted of vertical and horizontal linear measurements and angular measurements. The results were as follows. 1. Mean and standard deviation of the measurements were calculated for males and females. 2. Most of the skeletal vertical measurements, and maxillary and mandibular length were bigger in males than females. Whereas anterior facial height ratio(N-ANS/ANS-Me) as well as maxillary and mandibular antero-posterior position in relation to the vertical reference line(N-perpendicular) showed no signigicant difference between sexes. 3. Maxillary and mandibular dental antero-posterior position in relation to the vertical reference line(N-perpendicular) showed no significant difference between sexes. 4. The upper incisor show(U1-Stms) was 2.1+/-1.7mm in males and 3.3+/-1.7mm in females. In this study, hard tissue cephalometric norms of Korean adults for orthognathic surgery were obtained.
