© 1987 by European Orthodontic Society
Hyoid bone position, facial morphology and head posture in adults
Institute of Orthodontics, Royal Dental College Copenhagen
Dr Beni Solow Institute of Orthodontics Royal Dental College Nørre Alle 20 DK-2200 Copenhagen N Denmark
The purpose of the present study was to examine hyoid position, facial morphology and craniocervical posture in adult subjects with a complete or nearly complete dentition. The material consisted of lateral head films taken of 191 Finnish women aged 2029, 3049 and 5081 years. The cephalometric methods of measurement have previously been described (Solow and Tallgren, 1976).
In the two older age groups the mandibular inclination, the anterior facial heights and the sagittal jaw relation were, on average, significantly larger than in the young age group. The head position in relation to the cervical spine and the inclination of the cervical column showed no significant differences between the groups.
The mean vertical distances from the hyoid to the upper face, the mandible and the cervical column were significantly greater in the older age groups. Correlation analysis further indicated that a large hyo-mandibular distance (hy to ML) is associated with a large mandibular inclination (NSL/ML). The position of hyoid in relation to the cervical column showed less variability than the hyoid relationship to the maxilla and the mandible.
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