Journal of the Korean Academy of Pediatric Dentistry 1999;26(3):564-571.
Published online August 31, 1999.
HYOID BONE POSITION IN CLASS I, II AND III MALOCCLUSIONS
 
I급.II급.III급 부정교합환아에서의 설골의 위치
송윤주, 김현정, 남순현, 김영진
경북대학교 치과대학 소아치과학교실
Abstract
The importance of the hyoid bone lies in its unique anatomic relationships. It has no bony articulations but provides attachment for muscles, ligaments, and fascia of the pharynx, mandible, and cranium. Various studies have documented a variability of hyoid bone position in relation to changed mandibular position or head posture. The aim of this study is to investigate the hyoid bone position and inclination on cephalometric radiographs of three groups of patients exhibiting Class I, II, and III malocclusions. The conclusions obtained from this study can be summarized as follows ; 1. Class III malocclusion patients show a more anterior position of the hyoid bone and also less steep inclination of the hyoid bone. 2. The anteroposterior position of the hyoid bone relative to the cervical vertebra and mandible was very constant. 3. The hyoid bone represented the anterior bony boundary of the pharynx at a lower level than PNS.
Key Words: Hyoid bone, Hyoid triangle, Malocclusion, Pharynx


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