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

Niranjan Joshi

Date of original Performance / Presentation

January 2024

Publication Date / Copyright Date

1-1-2024

Abstract

ABSTRACT Objective: There are variations in the bone architecture surrounding the inferior alveolar canal in dentate and edentulous mandibles in dissected cadaver specimens. The purpose of this series of dissections is to visualize, observe patterns, compare, and measure the thickness of the bone-lining layer of the alveolar canal. Methods: Fourteen fresh-frozen cadaver head specimens were used. The dissection took place at Miami Anatomical Research Center. Information on age, gender, presence of molar tooth, and edentulism were included. Panoramic and Cone Beam Computed Tomography (CBCT) were obtained for each specimen. The dissection was executed with extraoral surgical access to the mandibular body. A long U-shaped vestibular cortical bone access was inverted, standardized from proximal-distal access of mental foramen, ending medially and anteriorly to the extension of the canal hosted within the ramus on the vestibular plate. The dissected inferior alveolar canals were between 40 and 50 mm long. Measurements of External Canal Width (ECW), Internal Canal Width (ICW), and Canal Cortical Thickness (CCT) were obtained using a digital caliper. ECW was measured between the superior and inferior cortical borders. ICW was measured from the superior and inferior canal borders. CCT was calculated by subtracting ICW from ECW (CCT = ECW – ICW). Canal widths were measured at the posterior segment of the IAC. Results: After completing the dissection of all fourteen specimens, it was found that all IACs had a layer of sponge-like cancellous bone around them, with different degrees of thickness and density. The lowest CCT observed was 0.1 mm in specimen D12. The highest was 1.5 mm in specimen N3. The most frequent CCT was 0.2 mm in 4 specimens (D9, D13, N4, D8), followed by 0.7 mm in 3 specimens (D7, N1, N10). Specimens D4 and D14 showed 0.6 mm. D2 and D11 had 0.5 mm. N7 showed 0.4 mm. Conclusion: Despite differences in age, gender, and edentulism, the IAC is surrounded by cancellous bone with a maximum thickness of 1.5 mm, encouraging further studies to determine a new standardized minimum distance from the inferior alveolar nerve.

Disciplines

Dentistry

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