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Surgical and Radiologic Anatomy

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Open Access 01-04-2017 | Original Article

Micro-CT study of the dehiscences of the tympanic segment of the facial canal

Authors: Magdalena Kozerska, Janusz Skrzat, Alexandru Spulber, Jerzy Walocha, Sebastian Wroński, Jacek Tarasiuk

Published in: Surgical and Radiologic Anatomy | Issue 4/2017

Abstract

Purpose

To depict the anatomy of the tympanic segment of the facial canal using a 3D visualization technique, to detect dehiscences, and to evaluate their frequency, location, shape, and size.

Methods

Research included 36 human temporal bones (18 infant and 18 adult samples) which were scanned using a Nanotom 180N device. The final resolution of the reconstructed object was 18 µm. Obtained micro-CT data were subsequently processed by the volume rendering software.

Results

The micro-CT study allowed for the 3D visualization of the tympanic segment of the facial canal and detects dehiscences in the studied material in both infants and adults. Most of the dehiscences (66.7 %) involved the inferior wall of the tympanic segment in infants as well as in adults, and were located above and backward to the oval window. The most frequent dehiscence shape was elliptic (66.7 % in infants; 50 % in adults). Furthermore, we observed dehiscences of fusiform and trapezoidal shape in infants. Length of the dehiscences in most cases ranged from 0.5 to 1.4 mm (50 % in infants; 75 % in adults).

Conclusions

Volumetric reconstructions demonstrated the course of the tympanic segment of the facial canal and its relationship with the tympanic cavity. Knowledge about the size and location of any dehiscence within the tympanic segment of the facial canal is necessary due to the surgical significance of this region. If a dehiscence occurs, there is an increased risk of injury to the facial nerve during the operations or spread of inflammation from the middle ear.

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Title: Micro-CT study of the dehiscences of the tympanic segment of the facial canal
Authors: Magdalena Kozerska
Janusz Skrzat
Alexandru Spulber
Jerzy Walocha
Sebastian Wroński
Jacek Tarasiuk
Publication date: 01-04-2017
Publisher: Springer Paris
Published in: Surgical and Radiologic Anatomy / Issue 4/2017
Print ISSN: 0930-1038
Electronic ISSN: 1279-8517
DOI: https://doi.org/10.1007/s00276-016-1744-4

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Micro-CT study of the dehiscences of the tympanic segment of the facial canal

Abstract

Purpose

Methods

Results

Conclusions

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Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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