Date of Award

2021

Embargo Period

8-1-2024

Document Type

Thesis

Degree Name

Master of Science in Dentistry

Department

Orthodontics

College

College of Dental Medicine

First Advisor

Timothy J. Tremont

Second Advisor

Loring Ross

Third Advisor

Kinon Lecholop

Fourth Advisor

Zachary Evans

Abstract

Purpose: The purpose of this investigation was to investigate the validity of 3 different cephalometric analyses used for diagnosis of the anteroposterior (AP) position of the maxilla. Methods: Retrospective data including a pre-treatment cephalometric radiograph, repose and smiling profile photographs, and a clinically determined upper incisor to Glabella Vertical (GV) measurement were collected from 30 consecutive patients. Photographs were deidentified with eye coverage and presented in survey form to groups of orthodontists and oral surgeons who judged the maxillae as prognathic, orthognathic, or retrognathic. Corresponding cephalometric radiographs were evaluated using McNamara, Steiner, and GV analyses. Cephalometric diagnoses and clinical impressions were compared to determine which analysis correlated best with clinical impressions. Results: There was a difference between clinical impressions of the AP position of the maxilla in smiling and repose profiles. There was a difference in diagnosis of AP position of the maxilla using the Steiner, McNamara and GV analyses. There was a correlation between clinical impression of repose profiles and diagnosis with the Steiner analysis. There was a correlation between clinical impression of smiling profiles and diagnosis with the GV analysis. Conclusions: Both repose and smiling profiles should be evaluated for comprehensive orthodontic treatment planning. The Steiner and GV analyses are useful tools for diagnosing the AP position of the maxilla on a cephalometric radiograph. Cephalometric analysis using GV may be a more valid analysis due to its superior correlation with clinical impressions of smiling profiles.

Rights

All rights reserved. Copyright is held by the author.

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