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International Journal of Dentistry
Volume 2017, Article ID 5130241, 6 pages
https://doi.org/10.1155/2017/5130241
Research Article

3D Morphology Analysis of TMJ Articular Eminence in Magnetic Resonance Imaging

1Department of Orthodontics and Radiology, University of São Paulo City (UNICID), São Paulo, SP, Brazil
2Department of Diagnosis and Surgery, São José dos Campos Dental School, São Paulo State University (UNESP), São José dos Campos, SP, Brazil

Correspondence should be addressed to Maria Beatriz Carrazzone Cal Alonso; rb.moc.oohay@psu_osnolaibm

Received 30 December 2016; Revised 6 May 2017; Accepted 25 May 2017; Published 21 June 2017

Academic Editor: Manuel Lagravere

Copyright © 2017 Izabella Nascimento Falcão et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose. The objective of this study was to evaluate the computational reconstruction of the articular eminence of the temporomandibular joint (TMJ) based on magnetic resonance imaging (MRI) and semiautomatic volumetric segmentation techniques for morphological classification of the TMJ structure. Materials and Methods. A total of 36 MRI scans of TMJ individuals were selected and formatted by using the ITK-SNAP software, consisting of MRI segmentation and generation of 3D models. The TMJ articular eminences were also classified according to the morphology analysis of the articular eminence in 3D reconstructions. Two independent trained and calibrated investigators performed the image analysis, which was repeated after thirty days. Results. There was no association between sex and eminence shape (). Fisher’s test revealed no statistically significant association between disc classification and eminence shape on both sides (). Chi-square test showed a significant statistically association between disc classification and disc displacement (). Intra- and interrater correlation coefficients showed excellent reproducibility values. Conclusions. Anatomical variability of the sample investigated was found, with predominantly round shape and presence of correlation between this shape and normal disc position. The correlation of flattened and convex shapes with disc position reduction indicated that type of disc derangement is more prevalent.