Abstract

This study examined the relationship between maxillary and mandibular incisor intrusion and root resorption. Age, sex, facial type, treatment time, extraction versus non-extraction therapy, width of the symphysis, and the angle of the incisors to skeletal reference planes were also studied for their relationship to intrusion and root resorption. Thirty-eight cases treated with utility arches for intrusion were selected. Root shortening was found to average 1.84 mm for maxillary incisors and 0.61 mm for mandibular incisors. Intrusion of incisors in a population that exhibited growth was found to be one of "holding against growth". No relationship was found to exist between the amount of intrusion achieved and the amount of root resorption observed. The change in angulation of the maxillary incisors and the extraction of permanent teeth were found to be related to the amount of maxillary incisor intrusion observed. However, the extraction of permanent teeth was not related to mandibular intrusion or root resorption in either arch. Age and the sex of the patient were found to be unrelated to intrusion or root shortening in either arch. Treatment time showed some correlation to the amount of root resorption observed. Facial type and width of the symphysis were not related to either intrusion or root shortening.

LLU Discipline

Orthodontics

Department

Dentistry

School

Graduate School

First Advisor

Roland D. Walters

Second Advisor

J. Milfred Anholm

Third Advisor

Helene Engstrom

Fourth Advisor

Lee Olsen

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

1987

Date (Title Page)

6-1987

Language

English

Library of Congress/MESH Subject Headings

Root Resorption; Incisor; Orthodontics -- methods

Type

Dissertation

Page Count

iii; 21

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

Download

Share

COinS