Abstract

Introduction: Single Cephalometric measurements are comparable between Cone Beam Computed Tomography (CBCT), Magnetic Resonance Imaging (MRl) and Conventional Lateral Cephalometric (LC) imaging methods. This study evaluated the agreement between the three imaging methods in facial type analysis (using a composite of 5 cephalometric measures).

Methods and Materials: Twenty-two subjects participated in this study. Cranial images were generated via three modalities: LC, CBCT and MRl. Cephalometric landmarks were identified on the three images per subject and a facial type analysis performed. An equally weighted facial type calculation composed of 5 cephalometric measurements (facial axis, facial depth, mandibular plane, lower face height, and mandibular arc) was calculated for each image. A comparison of Ricketts facial type and cephalic index was also performed.

Results: Intraclass correlation coefficients with 95% confidence intervals evaluated correlation and precision between the three imaging methods: MRl and CBCT 0.981 (0.954, 0.992), LC and CBCT 0.980 (0.952, 0.992), and LC and MRl 0.954 (0.893, 0.981). All p-values were < 0.001. The Ricketts facial analysis was not predictive of the Cephalic Index (r-squared, p < 0.100).

Conclusions: Facial type analysis (via MRI, CBCT and LC) showed excellent correlation and precision between imaging modalities. The Cephalic Index was not predictive nor statistically similar. The anthropologic Cephalic Index was not related to the facial type determined by analysis of MR image.

LLU Discipline

Orthodontics and Dentofacial Orthopedics

Department

Dentistry

School

Graduate Studies

First Advisor

V. Leroy Leggitt

Second Advisor

Joseph M. Caruso

Third Advisor

James R. Farrage

Fourth Advisor

Roland D. W. Neufeld

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

2010

Date (Title Page)

9-2010

Language

English

Library of Congress/MESH Subject Headings

Cephalometry -- methods; Facial Bones -- growth and development; Mandible -- growth and development; Cone-Beam Computed Tomography; Magnetic Resonance Imaging; Imaging, Three-Dimensional.

Type

Thesis

Page Count

xii; 44

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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