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 2023

Publication Date / Copyright Date

1-1-2023

Abstract

Objectives: The objective of this retrospective study was to examine the impacted maxillary canine position in all three dimensions, and whether there is an association between different horizontal and vertical skeletal relationships of the jaws. Background: The maxillary canine is in an esthetic zone and has important function. Therefore, it should be preserved and brought into the arch by the orthodontist when possible. Positioning of impacted canines in the sagittal, axial, and transverse direction in relation to anatomical structures, may have an association with different horizontal and vertical skeletal relationships of the maxilla and mandible. Discovering if there is an increased association of impacted canine positioning, with various skeletal jaw relationships can help formulate an appropriate treatment plan, diagnose difficult impactions, and use effective biomechanics to bring the canine into the correct arch location. With the CBCT at the forefront for making critical diagnostic and treatment planning decisions, this study will provide new information to build upon previous existing studies. Utilizing images from CBCTs, the purpose is to determine if a relationship between skeletal relationships and the position of the impacted maxillary canine in all three dimensions in the anterior maxillary region can be established. Methods: This investigation was a retrospective study that examined the position of impacted canines using CBCT imaging. Cephalometric images were constructed from the CBCT imaging to be used to make horizontal and vertical skeletal measurements. Results: No significant differences were found between maxillary canine position and horizontal skeletal relationships (Class I, Class II or Class III). Significant differences were found between vertical skeletal relationships (hypodivergent, hyperdivergent, normodivergent) and crown position, and the mesio-distal rotation of the impacted canine, both in the axial view. Hyperdivergent subjects had impacted maxillary canines significantly further from the mid-palatal suture and with a greater mesio-distal rotation away from the mid-palatal suture, compared to other vertical skeletal relationships. Conclusions: Although a relationship was seen, impacted maxillary canine position did not show statistical significance in association with horizontal skeletal relationship. A significant relationship was seen when comparing impacted canine position and vertical skeletal relationships in hyperdivergent subjects. Knowing impacted maxillary canines in hyperdivergent subjects are impacted further from the midline and favorably angulated, impacts treatment planning and the biomechanics needed to bring the canine into the arch.

Disciplines

Dentistry

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