Abstract

The purpose of this study is to determine if the hyoid bone could be used as a reliable and stable reference landmark. Previous researchers have used cranial landmarks to determine the hyoid bone position. The results of these studies have shown a large variability in hyoid position. To determine the hyoid bone position, an analysis called the hyoid triangle was used. The hyoid triangle is formed by joining the cephalometric points retrognathion (the most inferior posterior point on the mandibular symphysis), hyoidale (the most superior anterior point on the body of the hyoid bone), and C3 (the most anterior inferior point on the third cervical vertebra). The hyoid triangle was constructed using landmarks that are closer to the axis of rotation of the head than the cranium. This decreases the effect of head movement on hyoid position. Thirty pretreatment orthodontic patients ranging in age from 9-15 were used. The sample was selected randomly, and included males, females, and was not limited to any particular malocclusion type. Each patient had 2 lateral cephalometric films taken, with a mechanical holding device, to stabilize head position. Hyoid bone position was compared between the two radiographs. The results showed inconclusive evidence to validate the hyoid triangle as a method to locate the position of the hyoid bone.

LLU Discipline

Orthodontics

Department

Dentistry

School

Graduate School

First Advisor

Roland D. Walters

Second Advisor

James R. Wise

Third Advisor

Logan W. Barnard

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

1985

Date (Title Page)

6-1985

Language

English

Library of Congress/MESH Subject Headings

Orthodontics; Hyoid Bone

Type

Thesis

Page Count

vi: 45

Digital Format

PDF

Digital Publisher

Loma Linda University Libraries

Usage Rights

This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.

Collection

Loma Linda University Electronic Theses and Dissertations

Collection Website

http://scholarsrepository.llu.edu/etd/

Repository

Loma Linda University. Del E. Webb Memorial Library. University Archives

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