Abstract

The purpose of this study was to evaluate the soft tissue changes that occur following isolated mandibular advancement surgery. A sample of 70 non-growing patients were examined by tracing pre and post-operative radiographs. Then various landmarks were chosen and hand measured to determine hard and soft tissue changes. Significant correlations were found for many of the horizontal and vertical tissue landmarks and weaker correlations for all other landmarks. The decrease in the interlabial gap and the angular changes in the lower lip reflect the direction of surgical movement. The data from this study supports previous studies of smaller sample sizes and suggests a 1:1 soft to hard tissue ratio for rough clinical prediction in the chin and sublabial area. Reliability tests demonstrate the measurement technique to be accurate.

LLU Discipline

Orthodontics

Department

Dentistry

School

Graduate School

First Advisor

Joseph M. Caruso

Second Advisor

William J. Emmerson

Third Advisor

M. Toufic Jeiroudi

Fourth Advisor

Timothy B. Welch

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

1993

Date (Title Page)

6-1993

Language

English

Library of Congress/MESH Subject Headings

Osteotomy; Orthodontics; Lip

Type

Thesis

Page Count

iv; 30

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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