Journal Article

Adult craniocervical and pharyngeal changes - a longitudinal cephalometric study between 22 and 42 years of age. Part 1: morphological craniocervical and hyoid bone changes

I Kollias and O Krogstad

in The European Journal of Orthodontics

Published on behalf of European Orthodontics Society

Volume 21, issue 4, pages 333-344
Published in print August 1999 | ISSN: 0141-5387
Published online August 1999 | e-ISSN: 1460-2210 | DOI: http://dx.doi.org/10.1093/ejo/21.4.333
Adult craniocervical and pharyngeal changes - a longitudinal cephalometric study between 22 and 42 years of age. Part 1: morphological craniocervical and hyoid bone changes

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The purpose of this study was to investigate longitudinally, by cephalometric means, alterations in craniocervical morphology and hyoid bone position in adult males and females, in three different age groups at 10-year intervals, and to compare the changes between the two genders. The material consisted of three series of cephalograms of 26 males and 24 females with approximately a 10-year interval between each series.

Alterations with increasing age in males and females included:

1. An increase in anterior and posterior facial height in both genders, a reduction in mandibular prognathism, and an increase in the mandibular plane angle in females only.

2. The hyoid bond assumed a more inferior position in relation to different skeletal structures for both sexes.

3. Head posture alterations were similar for the male and female group over time.

The overall significant inter-sex changes over a 20-year period were a reduction in mandibular prognathism, an increase in the mandibular plane angle in females, and a more inferior position of the hyoid bone in males.

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Subjects: Restorative Dentistry and Orthodontics

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