Comparison of altered signal intensity, position, and morphology of the TMJ disc in MR images corrected for variations in surface coil sensitivity

Orhan, Kaan; Nishiyama, Hiroaki; Sasai, Tadashi; Murakami, Shumei; Furukawa, Souhei

doi:10.1016/j.tripleo.2005.04.004

Cited by 46 publications

(46 citation statements)

References 45 publications

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“…10 Therefore, several authors have evaluated the morphologies of the condyle and articular disc and investigated the correlation between their morphology and disc displacement. 2,7,[9][10][11][12][13][14][15][16][17] MRI is considered the gold standard imaging modality for evaluating TMJ discs, as it produces images of excellent soft-tissue contrast. 10,[18][19][20] Moreover, it is a non-invasive examination that is free of ionizing radiation.…”

Section: Introductionmentioning

confidence: 99%

Correlation between temporomandibular joint morphology and disc displacement by MRI

Farias¹,

Melo²,

Bento³

et al. 2015

Dentomaxillofacial Radiology

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Objectives:The aim was to evaluate the morphology of the temporomandibular joint's (TMJs) disc and condyle as well as its correlation with disc displacement, using MRI. Methods: 190 TMJs were retrospectively analysed. The condyle morphology of each TMJ was evaluated by two observers using both axial and coronal views, as were their disc morphology and displacement, using sagittal view. Condyle morphology was classified as flat, convex, angled or rounded in the coronal sections and as anterior side flat/posterior side convex, biconvex, anterior side concave/posterior side convex, flat or biconcave in the axial view. Disc morphology was determined as biconcave, biplanar, biconvex, hemiconvex or folded. x 2 , Fisher exact and Bonferroni correction tests were used to evaluate the data. ANOVA followed by post hoc Tukey's test was used to evaluate the interaction between age and disc displacement. Results: Anterior disc displacement with reduction; convex condyle morphology in the coronal view; anterior side concave/posterior side convex morphology in the axial view; and biconcave discs were found to be the most prevalent findings. An association was observed between disc morphology and disc displacement (p , 0.001). No correlation between condyle morphology and TMJ disc displacement was found (p 5 0.291 for axial and p 5 0.14 for coronal views). Conclusions:The results of this study suggest that TMJ disc morphology is associated with disc displacement.

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Section: Introductionmentioning

confidence: 99%

Correlation between temporomandibular joint morphology and disc displacement by MRI

Farias¹,

Melo²,

Bento³

et al. 2015

Dentomaxillofacial Radiology

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“…Studies have shown that the signal intensity of the posterior band increases in the following order : normal, posterior disc displacement with reduction, anterior disc displacement with reduction, and anterior disc displacement without reduction 12 . The signal intensity of the bone marrow in the condylar head is also used in the diagnosis of TMD.…”

Section: Discussionmentioning

confidence: 99%

Magnetic Resonance Imaging Signal Intensities of the Temporomandibular Joint Articular Disc and Cortical Bone: Are These Measurements Valid for the Diagnosis of Temporomandibular Joint Disease?

Fujikura

Nishikawa

Araki

2017

Showa Univ J Med Sci

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: The purpose of this study was to clarify the validity of measuring the signal intensities of cortical bone CB and temporomandibular joint TMJ discs on magnetic resonance MR images for the diagnosis of TMJ disease. Two investigations were performed. In the rst investigation, MR images of 13 TMJs of volunteers were obtained using a multi spin-echo sequence. Echo time TE was increased from 10 msec to 200 msec in steps of 10 msec. The signal intensities of the CB of the condylar head, and the anterior AD and posterior PD bands of the TMJ disc were measured, and their attenuation patterns were compared. In the second investigation, clinical MR images of 30 TMJs from patients with suspected TMJ disorders were selected. Proton density-weighted images PDWIs and T2-weighted images T2WIs were obtained at TEs of 14 and 85 msec, respectively, using a double-echo fast spin-echo sequence. The signal intensities of CB, AD, and PD were measured and compared with that of the external auditory meatus air using a Bonferroni test. AD and PD showed nearly identical signal intensity attenuation patterns. The signal intensities of AD and PD were lower than CB at TEs longer than 20 msec although they were higher at TEs shorter than 20 msec. Clinical PDWIs and T2WIs showed similar results. The signal intensities of CB, AD, and PD were signi cantly higher than the external auditory meatus air in both PDWIs and T2WIs. CB and TMJ discs show characteristic signal intensities, suggesting that the signal intensity measurement of these structures is valid.

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“…When the assessments differed, a consensus was reached through a repeated evaluation and discussion between the radiologists. The disc displacement of the TMJs was classified as normal, partial anterior disc displacement (PADD), anterior disc displacement with reduction (ADDwR), anterior disc displacement without reduction (ADDwoR), and sideways disc displacement [MDD/LDD (medial disc displacement/lateral disc displacement)] according to the following MRI criteria [7,16,17].…”

Section: Methodsmentioning

confidence: 99%

“…Moreover, for scientific studies, an objective diagnosis using imaging techniques must be reproducible, especially for prevalence studies [3]. To this end, various TMJ imaging techniques are used, including computerized tomography [4], sonography [5], arthrography [6], and magnetic resonance imaging (MRI) [7]. MRI is the most common and reliable imaging method of highlighting soft tissues without using ionizing radiation for classifying internal TMJ derangements and identifying the position and structure of the TMJ discs [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…To this end, various TMJ imaging techniques are used, including computerized tomography [4], sonography [5], arthrography [6], and magnetic resonance imaging (MRI) [7]. MRI is the most common and reliable imaging method of highlighting soft tissues without using ionizing radiation for classifying internal TMJ derangements and identifying the position and structure of the TMJ discs [7][8][9][10]. However, an unclear correlation often exists between clinical signs and symptoms and the imaging findings in all TMD patient groups, especially in particular populations [11,12].…”

Section: Introductionmentioning

confidence: 99%

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MRI evaluation of the classification, frequency, and disc morphology of temporomandibular joint disc displacements: a multicenter retrospective study in a Turkish population

et al. 2009

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Objectives Magnetic resonance imaging (MRI) of the temporomandibular joint (TMJ) and temporomandibular disorders (TMDs) have been discussed in detail for various populations. As no such study has examined the Turkish population, we determined the frequency of TMDs in the Turkish population through a multicentric investigation using MRI. Methods This retrospective study examined 504 TMJs of 252 symptomatic patients who had undergone bilateral MRI investigation in four different dental schools. The image analysis included the assessment of disc position and morphology, and recaptured the coronal and sagittal planes in the closed and open mouth positions. The TMJ disorders were classified using the Clinical Diagnostic Criteria for Temporomandibular Disorders (CDC/TMD). The correlations among the groups of TMJs and disc morphologies were analyzed statistically using the chi-square test (P B 0.05). Results Disc displacement and abnormal disc morphology were detected in 69.5% of the symptomatic TMJ patients. Of the joints examined using MRI, 154 were normal, 135 had anterior disc displacement with reduction (ADDwR), 145 had anterior disc displacement without reduction (ADDwoR), 30 had partial anterior disc displacement, and 18 had sideways disc displacements. Regarding disc morphology, enlargement in the posterior band was the most commonly encountered type and was observed in 152 TMJs. Overall, the average time for referral for treatment, which was defined as the time from symptom onset until the time of referral, was 1.5 years.Conclusions The most common type of disc displacement found in the Turkish population studied was ADDwoR. In addition, patients did not perceive the symptoms of TMDs as a disease and did not seek help until the TMJ derangement caused a major complaint.

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Comparison of altered signal intensity, position, and morphology of the TMJ disc in MR images corrected for variations in surface coil sensitivity

Cited by 46 publications

References 45 publications

Correlation between temporomandibular joint morphology and disc displacement by MRI

Correlation between temporomandibular joint morphology and disc displacement by MRI

Magnetic Resonance Imaging Signal Intensities of the Temporomandibular Joint Articular Disc and Cortical Bone: Are These Measurements Valid for the Diagnosis of Temporomandibular Joint Disease?

MRI evaluation of the classification, frequency, and disc morphology of temporomandibular joint disc displacements: a multicenter retrospective study in a Turkish population

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