Abstract

The purpose of this study was to give a graphic portrayal of the gross changes in occlussal [sic] relationship and the spacial relationship of the bony elements of the mid-face region as produced by palatal expansive forces. The animal of choice was the Macaca mulatta monkey.

The intact skulls were measured following the invivo experiment. The skulls were then mounted in clear plastic and sectioned anteroposterior in order to study and measure the sections which revealed the third dimension perspective.

It has been determined that a strong force can cause a disjunction of the midpalatal suture, that the opened suture was rapidly closed with new bone and other compensating mechanisms. The width of the floor of the nose was increased and the palatal vault was flattened and widened. The measurements obtained indicate that the maxillae moved in an upward and outward direction at the lateral aspects. It also appears that the nasal complex was structurally remodeled. In this study the animals were forced from normal occlussal [sic] function to dysfunction.

The outward appearance of the animals was also changed. The procumbency of the middle face was reduced. There was an apparent distal movement of the cephalometric point A due to the sutural configuration of the premaxilla.

The results of this study indicate that due to rapid expansion of the maxillary arch, concomitant changes occur in many of the surrounding structures of the maxillary complex. An understanding of the impact that this procedure can exert upon facial morphology should be helpful in orthodontic treatment planning.

LLU Discipline

Orthodontics

Department

Orthodontics and Dentofacial Orthopedics

School

Graduate School

First Advisor

Alden B. Chase

Second Advisor

Edwin H. Collins

Third Advisor

Karl K. Nishimura

Fourth Advisor

Alvin V. Schiess

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

1967

Date (Title Page)

6-1967

Language

English

Library of Congress/MESH Subject Headings

Palate; Craniology

Type

Thesis

Page Count

vi; 69

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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