Rehana Khan

Abstract

The purpose of this study was to determine the accuracy of the Newtom 3G™ in determining the angulation of the articular eminence. The benefits of conducting this study were to provide additional uses for the standard records that are taken for the purposes of orthodontic treatment, as well as evaluate the Newtom 3G™ for accuracy in measuring the anatomy of the glenoid fossa. This study required 20 participants that volunteered to allow their records to be used. Records evaluated were the Newtom 3G™, impressions, and wax check bite registrations. The wax record was taken using the 'forced bite' technique to register the angle of the articular eminence. This allowed the condyles to be seated in the superior position using the patient's own musculature. The wax check bite was used to determine the condylar settings on the SAM II articulator. The angle of the articular eminence was measured from the Newtom 3G™ image and the two measurements compared. For a small sample, a Cadiax recording was taken by a senior resident in the Graduate Prosthodontics Department. All measurements were compared using Cohen's Kappa Statistic and Pearson's Correlation Coefficient to determine inter-rater agreement and compare the three different methods of registering the articular eminence. The results showed 'substantial' correlation between the three Raters and 'moderate' correlation between the Newtom 3™ and Check Bite methods at the α = .05 nominal level. There was also 'substantial' correlation between the Newtom 3G™ and Cadiax method at the α = .1 nominal level for the left side of the jaw. Conclusions were that the method of measuring the articular eminence using the Newtom 3G™ was reproducible, however more study with a larger sample size would be necessary to draw conclusions about the comparisons between the three different methods.

LLU Discipline

Orthodontics and Dentofacial Orthopedics

Department

Orthodontics and Dentofacial Orthopedics

School

Graduate School

First Advisor

Joseph M. Caruso

Second Advisor

James Farrage

Third Advisor

Roland Neufeld

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

2005

Date (Title Page)

12-2005

Language

English

Library of Congress/MESH Subject Headings

Cartilage, Articular -- radiography; Tomography, X-Ray Computed; Imaging, Three-Dimensional; Maxilla -- radiography; Temporomandibular Joint

Type

Thesis

Page Count

x; 51

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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