Abstract

The purpose of this study was to evaluate and predict the expected changes that occur in the nasal cavity volume following rapid palatal expansion. Eighteen subjects (11 female, 7 male), ages 9 to 18, requiring rapid palatal expansion in conjunction with comprehensive orthodontic treatment, were selected for the study. Rapid palatal expansion was accomplished using the standard, banded hyrax appliance. Three-dimensional cone beam computed tomograms using the NewTom 9000™ were acquired before and after expansion. Serial coronal slices of the nasal cavity were made using the QV9000™ software program. The resultant serial images were imported into 3-D Doctor™ for analysis of the nasal cavity volume.

The NewTom 9000™ scanner and 3-D Doctor™ demonstrated the capacity for highly repeatable linear and volumetric measurements. All subjects experienced an increase in nasal cavity volume. Measurements of nasal cavity volume increase demonstrated no linear correlation with the amount of hyrax expansion. Based on this sample, the nasal cavity volume may be expected to increase by 1.5 cm3 - 2.5 cm3 following rapid palatal expansion, irrespective of the amount of expansion achieved. No other variables investigated in the present study proved to have statistically significant correlations with change in nasal cavity volume following rapid palatal expansion.

LLU Discipline

Orthodontics and Dentofacial Orthopedics

Department

Orthodontics and Dentofacial Orthopedics

School

Graduate School

First Advisor

Joseph M. Caruso

Second Advisor

Max Crigger

Third Advisor

V. Leroy Leggitt

Fourth Advisor

Matt L. Riggs

Fifth Advisor

Guy Taylor

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

2003

Date (Title Page)

12-2003

Language

English

Library of Congress/MESH Subject Headings

Palate; Nasal Cavity -- radiography; Tomography, X-Ray Computed; Reconstructive Surgical Procedures; Tissue Expansion; Palatal Expansion Technique

Type

Thesis

Page Count

viii; 42

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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