Korean J Orthod.  2018 Jan;48(1):39-47. 10.4041/kjod.2018.48.1.39.

Dentofacial transverse development in Koreans according to skeletal maturation: A cross-sectional study

• Hwang S
• Noh Y
• Choi YJ
• Chung C
• Lee HS
• Kim KH

• KMID: 2441440
• DOI: http://doi.org/10.4041/kjod.2018.48.1.39

Abstract

OBJECTIVE
The aim of this study was to establish the normative data of dentofacial transverse dimensions according to the skeletal maturation stage in Korean adolescents with good occlusion, assess gender differences and determine correlations between transverse variables.
METHODS
A total of 577 Korean subjects between ages 7 to 19 years and exhibiting skeletal Class I occlusion were categorized by skeletal maturation index (SMI) of Fishman using hand-wrist radiographs. Dentofacial transverse dimensions were assessed using posteroanterior cephalograms. Independent two-sample t-tests were used to analyze differences between genders. Pearson correlation coefficient was used to determine the correlation between transverse measurements.
RESULTS
Dentofacial transverse norms relevant to skeletal maturation stages were established. The average maxillomandibular width difference and ratio at growth completion was 22.16 mm and 77.01% for males; 23.70 mm and 74.06% for females, respectively. Males had greater facial, maxillary and mandibular widths compared to females at every SMI stage. The maxillary and mandibular intermolar widths showed the strongest correlation for both sexes (r = 0.826 for males, r = 0.725 for females).
CONCLUSIONS
Dentofacial transverse norms of Korean adolescents were established according to developmental stage. All dentofacial widths were greater in males at growth completion. Maxillary and mandibular intermolar widths were strongly correlated. This study may serve as a guideline for the assessment of dentofacial transverse growth according to skeletal maturation stage in Korean adolescents with good occlusion.

Keyword

Transverse development; Skeletal maturation; Growth and development; Posteroanterior cephalometrics

MeSH Terms

Adolescent
Age Determination by Skeleton
Cross-Sectional Studies*
Female
Growth and Development
Humans
Male

Figure

• 

  Figure 1 Landmarks and transverse measurements. 1. Cranial width (bieuryon width): distance between the most lateral points on the cranium. 2. Facial width (bizygomatic width): distance between the most lateral points on the zygomatic arch. 3. Nasal width: greatest distance between the right and left lateral bony walls of the nasal cavity. 4. Maxillary width: distance between the right and left jugal process. The jugal process is the intersection of the maxillary tuberosity outline and the zygomatic buttress. 5. Maxillary intermolar width: distance between the most lateral points on the buccal surfaces of the permanent maxillary first molar crowns. 6. Mandibular intermolar width: distance between the most lateral points on the buccal surfaces of the permanent mandibular first molar crowns. 7. Mandibular width: distance between the right and left antegonial notch.

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