Abstract

The intent of this paper is to evaluate the effects of second molar extractions in conjunction with Bionator treatments. Eighteen Orthodontic patients were used in this study. All had had second molars extracted. Lateral cephalometric radiographs were traced and used to evaluate the treatment. The average age at time of extraction was 13 years, 3 months. The average treatment time was 38.3 months.

There were some orthopedic changes. The convexity decreased significantly, the condyle axis increased more than expected in normal growth. Also, the lower facial height and facial axis both became more dolichotype (open).

The upper and lower incisors were tipped distally. The upper first molar was held back and the lower first molar moved distally up to 5 millimeters with the average of 1 millimeter. All third molars erupted in place.

The data has shown that if the patient has slightly dolichofacial axis (less than 90°) and long condyle axis at T1 (beginning of treatment), we would expect some significant distal movement of lower first molar upon the extraction of lower second molar.

LLU Discipline

Orthodontics

Department

Dentistry

School

Graduate School

First Advisor

Lawrence W. Will

Second Advisor

Gary Engel

Third Advisor

John K. Pearson

Fourth Advisor

Thomas L. Robertson

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

Tooth Extraction; Orthodontic Appliances, Removable

Type

Thesis

Page Count

vi; 40

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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