Can dynamic magnetic resonance imaging replace static magnetic resonance sequences in evaluation of temporomandibular joint dysfunction?

Zeinab Sobhy Ahmed Sayed Ahmed Kamel,Hanan Ahmad Nagy,Mohammad Hassan Rashad El-Shafey,Omar Ahmed Hassanien

doi:10.1186/s43055-020-00396-8

Zeinab Sobhy Ahmed Sayed Ahmed Kamel, Hanan Ahmad Nagy + Show 2 more

Open Access

https://doi.org/10.1186/s43055-020-00396-8

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Abstract

BackgroundStatic MRI was used as an effective tool for diagnosis of temporomandibular joint dysfunction instead of invasive techniques such as arthroscopy and arthrography. The purpose of this study was to detect whether dynamic MRI can be used instead of static MRI in diagnosis of TMJ dysfunction or not.ResultsAccording to disc displacement, anterior disc displacement was detected in 29 joints (36.25%) by both static and dynamic MRIs, and medial and lateral disc displacements were detected only by static MRI. Regarding disc mobility, dynamic MRI detects stuck disc in 4 joints versus 2 joints detected by static MRI (p value 0.008). Condylar translation was abnormal in 18 joints (22.5%) by static MRI and in 26 joints (32.5%) by dynamic MRI (p value < 0.001). The detection rate of articular disc for dynamic MRI was 87.5% versus static MRI 92.5% (p value 0.038), and the detection rate of condylar head for dynamic MRI was 97.5% versus static MRI 100% (p value 0.012).ConclusionDynamic MRI cannot replace static MRI in evaluation of TMJ dysfunction; both of them support each other for accurate diagnosis and better image quality.

Highlights

Static magnetic resonance imaging (MRI) was used as an effective tool for diagnosis of temporomandibular joint dysfunction instead of invasive techniques such as arthroscopy and arthrography
The most frequent cause of temporomandibular joint (TMJ) dysfunction is internal derangement which refers to an alteration in the normal pathways of motion of the TMJ that largely involves the function of the articular disc; these alterations have been referred to as disc derangement [2]
Unilateral temporomandibular joint dysfunction was found in 19 patients (47.5%), bilateral temporomandibular joint dysfunction was found in 7 patients (17.5%), and no affection could be assessed in 14 patients (35%)

Summary

Introduction

Static MRI was used as an effective tool for diagnosis of temporomandibular joint dysfunction instead of invasive techniques such as arthroscopy and arthrography. The temporomandibular joint (TMJ) is one of the most complex joints of the body It lies between the jaw and the skull, more the mandibular condylar process with the temporal bone, with an articular disc in the space between them. It is one of the important structures aiding in the mouth opening and closing during articulation, chewing, and swallowing [1, 2]. TMJ disorder is a common problem and affects up to one third of all adults at some stage in their life It refers to impaired functioning of the TMJ and frequently. The main dysfunctional aspect of disc physiology is disc displacement that may be caused by trauma, laxity of ligaments, bruxism, synovial fluid alteration, and improper activity of lateral pterygoid muscles [5]

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