Abstract

A problem common to all of the full-banded orthodontic techniques currently in use is the delivery of an optimum force to each tooth without disrupting the forces on other teeth. This problem becomes especially acute during finishing. It arises out of Newton's third law, which states that for every action, there is an equal and opposite reaction. Thus, in full-banded techniques, a force on one tooth gives rise to generally undesirable reactive forces on other teeth in its vicinity.

The theory behind the buccal arch positioner (BAP) is dissipation of the force on any one tooth over every other tooth in the arch. In order to do this, a heavy rigid member is placed in the vestibule, and small, flexible wires attached to it for the individual teeth.

In past usage, it has been found that the net of all the forces on the rigid member of the BAP do not sum to zero, but rather cause it to skew, thereby introducing undesirable forces on many of the teeth. The purpose of this paper is to demonstrate a means of applying extraoral traction to the rigid member in order to maintain it in a predetermined position in relation to a finished lower arch, and thus eliminate the undesirable secondary forces caused by skewing of the rigid member.

Experimental procedures were carried out on a standard orthodontic articulator. Tooth movements were accomplished by heating the Wax surrounding the teeth in a 55° C. water bath.

When used in conjunction with extraoral traction, the BAP was found to be a highly effective appliance, which definitely warrants further clinical evaluation.

Although originally proposed and evaluated in the context of a finishing appliance, the advantages of the BAP over conventional appliances would suggest its use in the early stages of treatment, as well as in finishing.

LLU Discipline

Orthodontics

Department

Dentistry

School

Graduate School

First Advisor

Roland D. Walters

Second Advisor

John P. DeVincenzo

Third Advisor

John K. Pearson

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

1974

Date (Title Page)

8-1974

Language

English

Library of Congress/MESH Subject Headings

Dental Instruments

Type

Thesis

Page Count

vi; 26

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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