Abstract
This study established cone beam computed tomography (CBCT)-based cephalometric norms
for Brazilian adults, including the assessment of sexual dimorphism. An observer performed
McNamara’s cephalometric analysis twice on 60 CBCT datasets acquired from patients
with a normal dental occlusion, divided equally into two groups by sex. Welch’s t-test was applied to assess differences between the sexes in hard tissue cephalometric
measurements, and Dahlberg’s formula was used to calculate measurement error introduced
by the observer. The cephalometric measurements of effective mandibular length, effective
midfacial length, maxillomandibular differential, and lower anterior facial height
presented sexual dimorphism. Linear measurements had error ≤0.78 mm, and angular measurements had error ≤1.24°. The results show that (1) the CBCT-based
cephalometric norms established in this study are reliable for use by researchers
and clinicians, and (2) Brazilian adult males and females have similar craniofacial
morphology, with males possessing larger jaws than females.
Key words
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Article info
Publication history
Published online: August 10, 2017
Accepted:
June 6,
2017
Identification
Copyright
© 2017 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.
