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  T2 relaxation times of the retrodiscal tissue in patients with temporomandibular joint disorders and in healthy volunteers: A comparative study

Kakimoto, N., Shimamoto, H., Kitisubkanchana, J., Tsujimoto, T., Senda, Y., Iwamoto, Y., et al. (2019). T2 relaxation times of the retrodiscal tissue in patients with temporomandibular joint disorders and in healthy volunteers: A comparative study. Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology, 128(3), 311-318. doi:10.1016/j.oooo.2019.02.005.

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Kakimoto, Naoya, Author
Shimamoto, Hiroaki, Author
Kitisubkanchana, Jira, Author
Tsujimoto, Tomomi, Author
Senda, Yurie, Author
Iwamoto, Yuri, Author
Verdonschot, Rinus G.1, Author           
Hasegawa, Yoko, Author
Murakami, Shumei, Author
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1Hiroshima University, Hiroshima, Japan, ou_persistent22              

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 Abstract: Objective. The aims of this study were to compare the temporomandibular joint (TMJ) retrodiscal tissue T2 relaxation times between patients with temporomandibular disorders (TMDs) and asymptomatic volunteers and to assess the diagnostic potential of this approach.
Study Design. Patients with TMD (n = 173) and asymptomatic volunteers (n = 17) were examined by using a 1.5-T magnetic resonance scanner. The imaging protocol consisted of oblique sagittal, T2-weighted, 8-echo fast spin echo sequences in the closed mouth position. Retrodiscal tissue T2 relaxation times were obtained. Additionally, disc location and reduction, disc configuration, joint effusion, osteoarthritis, and bone edema or osteonecrosis were classified using MRI scans. The T2 relaxation times of each group were statistically compared.
Results. Retrodiscal tissue T2 relaxation times were significantly longer in patient groups than in asymptomatic volunteers (P < .01). T2 relaxation times were significantly longer in all of the morphologic categories. The most important variables affecting retrodiscal tissue T2 relaxation times were disc configuration, joint effusion, and osteoarthritis.
Conclusion. Retrodiscal tissue T2 relaxation times of patients with TMD were significantly longer than those of healthy volunteers. This finding may lead to the development of a diagnostic marker to aid in the early detection of TMDs.

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Language(s): eng - English
 Dates: 2019
 Publication Status: Issued
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.oooo.2019.02.005
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Title: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Source Genre: Journal
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Pages: - Volume / Issue: 128 (3) Sequence Number: - Start / End Page: 311 - 318 Identifier: ISSN: 2212-4403