Abstract

The purpose of this investigation was to develop a clinically feasible procedure for recording the magnitudes of glosso-maxillary forces at four palatal loci using an electronic transducer system described by Lear et, al. (1965). Of particular interest was the development of a convenient and accurate calibration device for both intraoral and extraoral application. A further object of interest was the effect an acrylic carrier plate might introduce to the magnitude of force response. Finally whether or not any significant adaptation to the carrier plate or to the transducers occurs during a reasonable testing period (six to seven hours).

A calibration probe was developed utilizing a strain gage transducer of the design reported by Lear et. al. (1965). This probe was invaluable for intraoral calibrations and was also used for extraoral calibration of the transducers used in this investigation.

Eight selected functional tasks were repeated at hourly intervals for a six to seven hour period utilizing five subjects (age sixteen to twenty-one). Each subject was tested both with a rigid Hawley type palatal carrier, and with a direct tissue mounted transducer system.

The results of this investigation indicate that the transducer design used (Lear et. al. 1965) was reliable, accurate, and responsive in magnitudes of force. The calibration probe utilized is a versatile and useful instrument in analysis of intraoral forces. Calibration and standardization of the transducers utilized is greatly facilitated.

The results indicated that there was no significant difference in the magnitudes of force response between rigidly mounted and tissue mounted transducer systems. Subjectively, however, the versatility and flexibility of the direct tissue mounting technique used in this investigation indicates a new useful procedure for recording glosso-maxillary phenomena.

An analysis of significance of difference in magnitudes of forces applied to the four loci indicates that the left maxillary molar area receives at least twenty-five per cent greater forces than the other three sites. The other three sites appear grouped within a similar range of force values.

There was no evidence of adaptation phenomena over a six to seven hour period whether the transducers were mounted on a rigid carrier or directly to oral tissues.

LLU Discipline

Orthodontics

Department

Dentistry

School

Graduate School

First Advisor

Thomas J. Zwemer

Second Advisor

Kenneth R. Lutz

Third Advisor

Karl K. Nishimura

Fourth Advisor

Ivan R. Neilsen

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

1966

Date (Title Page)

6-1966

Language

English

Library of Congress/MESH Subject Headings

Tongue Habits; Maxilla

Type

Thesis

Page Count

vi; 55

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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