Abstract

Frontal photographs on a total of one hundred and three individuals who had been treated by Dr. Ricketts, and had been involved in a prior study at Rocky Mountain Data Systems, were evaluated for facial proportions according to Ricketts application of Pythagoras' golden section. Seven facial proportions were analyzed from 1:1 retention phase frontal photographs. Forty individuals, made up of twenty-two females and eighteen males, 12.2 to 21.0 years of age, were selected and divided into two groups of twenty each, according to their soft tissue facial proportions. A range of acceptability for the facial proportions was derived. Proportions within this range were considered acceptable; whereas, those measurements outside the range were considered unacceptable.

Group one had five or more of the seven proportions within the acceptable range, while group two had two or less acceptable proportions. The golden section skeletal analysis was applied to the retention phase lateral cephalometric radiographs for both groups. Facial patterns, as described by the Eleven Factor Analysis of the Modified Downs Analysis, were determined for the individuals of each group.

The results revealed a brachyfacial tendency in the "acceptable" soft tissue ratio group, while the "nonacceptable" soft tissue ratio group showed a mesofacial pattern. No statistically significant correlation was found between the soft tissue and the hard tissue proportion measurements and the Eleven Factor Analysis components.

LLU Discipline

Orthodontics

Department

Dentistry

School

Graduate School

First Advisor

Lee E. Olsen

Second Advisor

J. Milford Anholm

Third Advisor

Chelan G. Ehler

Fourth Advisor

Ronald C. Parker

Fifth Advisor

Robert J. Schulhof

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

1982

Date (Title Page)

4-1982

Language

English

Library of Congress/MESH Subject Headings

Esthetics, Dental; Facial Asymmetry; Cephalometry

Type

Thesis

Page Count

vi; 37

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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