Comparison of the T2 Relaxation Time of the Temporomandibular Joint Articular Disk between Patients with Temporomandibular Disorders and Asymptomatic Volunteers

Kakimoto, Naoya; Shiba, Hiroaki; Chindasombatjaroen, J.; Tsujimoto, Tokuzou; Tomita, Shuichiro; Hirabayashi, Yoko; Murakami, Shumei; Furukawa, Souhei

doi:10.3174/ajnr.a3880

Cited by 10 publications

(11 citation statements)

References 21 publications

(26 reference statements)

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“…T2 values of the articular disc were reported in previous studies showing both similar (26.9 ± 3.7, 29.3 ± 3.8, and 25.19 ± 1.15 ms) 10 – 12 and much longer values (40.21 ± 2.95 ms) 13 in healthy volunteers compared to our TMD-negative volunteers. In those studies, MRI examinations were performed using TMJ surface coils.…”

Section: Discussionsupporting

confidence: 87%

“…Previous studies have revealed a significantly longer T2 relaxation time in retrodiscal tissue 9 , but no significant differences in the articular disc 10 between volunteers and patients using a 1.5 Tesla (T) MR machine. Moreover, a study predicting intra- and inter-observer reproducibility of T2 mapping in asymptomatic volunteers at 3.0 T was also conducted and proven feasible for TMJ examination 11 .…”

Section: Introductionmentioning

confidence: 97%

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Intra- and inter-examination reproducibility of T2 mapping for temporomandibular joint assessment at 3.0 T

Wongratwanich

Nagasaki

Shimabukuro

et al. 2022

Sci Rep

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T2 mapping allows quantification of the temporomandibular joint (TMJ) ultrastructural degeneration. The study aimed to assess intra- and inter-examination reproducibility of T2 mapping for TMJ evaluation at 3.0 Tesla (T). Seventeen volunteers, regardless of temporomandibular disorder (TMD) diagnosis, received magnetic resonance (MR) examination at 3.0 T. T2 mapping was performed twice (> 5 min between sessions without repositioning) on 12 volunteers to ensure intra-examination reproducibility. Nine volunteers underwent two examinations (> 6 months) to ensure inter-examination reproducibility. The regions of interest (ROIs) of the articular disc and retrodiscal tissue were manually selected and calculated. The mean T2 values of the articular disc and retrodiscal tissue were 25.3 ± 3.0 and 30.0 ± 4.1 ms, respectively. T2 mapping showed excellent intra-examination intraclass correlation coefficients (ICCs) for both articular disc (0.923) and retrodiscal tissue (0.951). Very strong correlations (r) were observed in both articular disc (0.928) and retrodiscal tissue (0.953) (P < .001). Inter-examination reproducibility also demonstrated that the ICCs were excellent (0.918, 0.935) on both ROIs. T2 values between first and second examinations were strongly correlated (r = 0.921, 0.939) (P < .001). In conclusion, T2 mapping seems to be a promising tool for TMJ assessment, regardless of the TMJ condition.

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Section: Discussionsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 97%

Intra- and inter-examination reproducibility of T2 mapping for temporomandibular joint assessment at 3.0 T

Wongratwanich

Nagasaki

Shimabukuro

et al. 2022

Sci Rep

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“…Cao and Kakimoto performed T2 mapping of the articular disc demonstrating significant variations among the different portions of the disc [5] and prolongation of the T2 relaxation times of the disc with progressive degeneration [45]. Few studies have evaluated the application of UTE techniques in the TMJ [13,14,31].…”

Section: Discussionmentioning

confidence: 99%

High-resolution morphologic and ultrashort time-to-echo quantitative magnetic resonance imaging of the temporomandibular joint

et al. 2015

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Objective To implement high-resolution morphologic and quantitative magnetic resonance imaging (MRI) of the temporomandibular joint (TMJ) using ultrashort time-to-echo (UTE) techniques in cadavers and volunteers. Methods This study was approved by the institutional review board. TMJs of cadavers and volunteers were imaged on a 3T-MR system. High-resolution morphologic and quantitative sequences using conventional and UTE techniques were performed in cadaveric TMJs. Morphologic and UTE quantitative sequences were performed in asymptomatic and symptomatic volunteers. Results Morphologic evaluation demonstrated the TMJ structures in open and closed-mouth position. UTE techniques facilitated the visualization of the disc and fibrocartilage. Quantitative UTE MRI was successfully performed ex-vivo and in-vivo reflecting the degree of degeneration. There was a difference in the mean UTE T2* values between asymptomatic and symptomatic volunteers. Conclusions MRI evaluation of the TMJ using UTE techniques allows characterization of the internal structure and quantification of the MR properties of the disc. Quantitative UTE MRI can be performed in-vivo with short scan times.

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“…In particular, Cao et al 68 and Schmid‐Schwap et al 69 found regional variation of T 2 values in different bands and layers of the TMJ disc, probably due to different orientations of collagen fibers in different histologic zones. Additionally, Kakimoto et al reported that the T 2 values of the TMJ disc were longer in patients with progressive TMD and older age groups compared to those of healthy volunteers and younger age groups, which they speculated might be attributed to the loss of collagen and proteoglycan in degenerating cartilages 72 . On the contrary, Bristela et al suggested that T 2 mapping did not seem to be a suitable diagnostic tool for TMJ imaging at present, because they found significant moderation effects between T 2 values of disc and other pathological conditions, especially joint effusion 63 .…”

Section: T2 Mappingmentioning

confidence: 99%

MRI of Temporomandibular Joint Disorders: Recent Advances and Future Directions

Xiong

Zheng

Tang

et al. 2020

Magnetic Resonance Imaging

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Temporomandibular joint disorders (TMDs) are a prevalent disease covering pain and dysfunction of temporomandibular joints and masticatory muscles, which can be detrimental to quality of life. Magnetic resonance imaging (MRI) is a powerful and noninvasive tool for the imaging and understanding of TMD. With the recent technical development of dynamic and quantitative MRI techniques, including diffusion‐weighted imaging, T2 mapping, and ultrashort/zero echo time, it is now feasible in TMD imaging and has been preliminarily investigated with promising results. In this review we will discuss the recent advances of MRI techniques in TMD and its future directions, and hope to highlight the scientific potential and clinical value of novel MRI techniques in diagnosing and treating TMD. Level of Evidence 4 Technical Efficacy Stage 3

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Comparison of the T2 Relaxation Time of the Temporomandibular Joint Articular Disk between Patients with Temporomandibular Disorders and Asymptomatic Volunteers

Cited by 10 publications

References 21 publications

Intra- and inter-examination reproducibility of T2 mapping for temporomandibular joint assessment at 3.0 T

Intra- and inter-examination reproducibility of T2 mapping for temporomandibular joint assessment at 3.0 T

High-resolution morphologic and ultrashort time-to-echo quantitative magnetic resonance imaging of the temporomandibular joint

MRI of Temporomandibular Joint Disorders: Recent Advances and Future Directions

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