Abstract

A cephalometric study was conducted to determine the ideal inclination of the maxillary central incisor for various facial patterns. Selected measurements were made on lateral headplate tracings of three samples: ideal, random and Class III malocclusions. Statistical analysis of data included means, standard deviations, simple correlations and stepwise regressions.

The Frankfort plane was found to be the most reliable reference plane when measuring the inclination of the maxillary central incisor. The maxillary central incisor inclination was found to be dependent upon the lower incisor position and inclination, chin position and the anterior cranial base inclination. A formula was produced to individualize the maxillary central incisor inclination in various facial patterns. The maxillary central incisor inclination to Frankfort plane = 115° + 1.25 [(lower incisor to APo mm) -1] + [facial axis - 90] + .93 [cranial deflection - 30] ± 5.5°.

It was concluded that the maxillary central incisor should be individualized and not placed at the same fixed norm for each patient.

LLU Discipline

Orthodontics

Department

Dentistry

School

Graduate School

First Advisor

John K. Pearson

Second Advisor

Clelan G. Ehrler

Third Advisor

Lloyd E. Gauntt

Fourth Advisor

Lee E. Olsen

Fifth Advisor

Jack L. Tomlinson

Degree Name

Master of Science (MS)

Degree Level

M.S.

Year Degree Awarded

1977

Date (Title Page)

5-1977

Language

English

Library of Congress/MESH Subject Headings

Maxillofacial Prosthesis

Type

Thesis

Page Count

v; 51

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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