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A Morphometric and Cellular Analysis Method for the Murine Mandibular Condyle

A Morphometric and Cellular Analysis Method for the Murine Mandibular Condyle

Published on: January 11, 2018

Relationships between temporomandibular joint disk displacements and condylar volume

Min-Seok Chang¹, Jeong-Ho Choi¹, Il-Hyung Yang²

¹Department of Orthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea.

Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology

|December 14, 2017

Abstract

Objectives:

The aim of this study was to assess the relationship between mandibular condylar volume and disk displacement status in adult males and females.

Study Design:

We evaluated 122 temporomandibular joints in 61 patients using magnetic resonance imaging (MRI) and computed tomography (CT). MRI data were used to assign disk status as normal disk position (NR), disk displacement with reduction (DDR), or disk displacement without reduction (DDNR). CT data were used to calculate total condylar volume and its components, cortical volume, and trabecular volume. The relationships among condylar volume, disk status, and gender were tested with 2-way analysis of variance.

Results:

Condylar volumes significantly correlated with disk displacement, tending to decrease as displacement increased. There were significant differences in both total condylar volume and trabecular volume among the DD status (NR > DDR > DDNR), whereas cortical volume was significantly different only between NR/DDR and DDNR (NR/DDR > DDNR). The volume decreases associated with temporomandibular joint DD were found in both males and females, with greater decreases in men than in women as DD progressed.

Conclusions:

Condylar volumes are significantly associated with disk displacement status. Joints with nonreducing disks showed the smallest condylar volumes in both males and females.

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