Evaluation of craniofacial proportions: A pilot study
Abstract
Background: Regarding the need for determining the cephalometric norms for each population
and the advantages of proportional analyses, we evaluated the variables of McNamara and Schwartz
analyses and their relation in a pilot study on 6-17 years old Iranian students and provided formulas,
which show these relations.
Materials and Methods: In this descriptive-analytical study, a tatal of cephalometric radiographs
from the archive documents of Orthodontic Department of Isfahan Dental School was selected
and traced. The variables of McNamara and Schwartz analyses were investigated. The data were
analyzed by t-test and linear regression and Spearman correlation coeffi cient tests using SPSS 12
software, and the signifi cance was set at 0.05. Then, a formula was suggested for predicting the
relation between the jaws, cranium and face.
Results: The variables measured in this study were signifi cantly different between the genders (P <
0.05), except for Co-Gn (P = 0.055), and they were higher in boys. All variables signifi cantly increased (P
< 0.05) with age from 6 to 17 years. The formulas presented in this study can be used for calculating the
amount of PNS-APmax, Go-APman and the Co-Gn, anterior nasal spine-menton in the Iranian population.
Conclusion: Within the limitation of this study, the formula presented in this study might be
considered to predict the relation between jaw dimensions and cranial base and facial dimensions
in the Iranian population.
Key Words: Analysis, cephalometry, orthodontics
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