Student Theses, Dissertations and Capstones

Document Type

Thesis - NSU Access Only

Degree Name

Master of Science (M.S.) in Dentistry

Copyright Statement

All rights reserved. This publication is intended for use solely by faculty, students, and staff of Nova Southeastern University. No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, now known or later developed, including but not limited to photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author or the publisher.

Department

College of Dental Medicine

First Advisor

Eun Choi

Date of original Performance / Presentation

January 2022

Publication Date / Copyright Date

1-1-2022

Abstract

Objectives: The objective of this retrospective study was to compare temporomandibular joint (TMJ) space measurements made from CBCT images before and after orthodontic treatment using the MEAW technique in adult patients with different types of malocclusions. Background: Occlusion and alterations in the anatomy of the TMJ were once thought to be responsible for the development of temporomandibular disorders (TMDs). Currently, it is accepted that occlusion is only one of many factors involved in the development of a TMD and is not the primary cause. However, occlusion is a risk factor for development of a TMD, and orthodontic treatment that results in a stable joint position that coincides with a stable occlusal position may reduce the chance of developing a TMD, especially in adult patients who have less capacity for adaptation. Therefore, it is desirable to better understand how orthodontic treatment may affect joint position. Methods: This investigation was a retrospective study that compared initial condylar position to posttreatment condylar position in nongrowing patients with different classifications of anterior open bite malocclusions who were treated with the MEAW technique. Measurements of condylar position were taken from CBCT scans taken prior to treatment (T1) and after completion of treatment (T2). Results: The proposed sample size was not reached so comparisons between different malocclusion groups were not possible. When subjects were analyzed as one group, significant differences were detected between the initial and final measurements for the following measurements: overbite (OB), right anterior joint space (R AJS), right linear ratio (R LR), right lateral joint space (R LJS), and left anterior joint space (L AJS). Conclusions: The results of this study suggest that orthodontic treatment using MEAW technique may potentially result in condylar repositioning and alter TMJ joint spaces. The direction of repositioning may be influenced by the initial classification of the malocclusion. Differences were small and may not be clinically significant.

Disciplines

Dentistry

Keywords

CBCT; condylar repositioning; MEAW; space; temporomandibular; TMJ

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