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Congress: ECR26
Poster Number: C-11455
Type: Poster: EPOS Radiologist (educational)
Authorblock: I. Lysach; Brest/BY
Disclosures:
Ilya Lysach: Nothing to disclose
Keywords: Head and neck, MR, Imaging sequences, Arthritides
Learning objectives Learn the normal anatomy of the TMJ in the position of the mouth closed and the mouth open. Review the MRI protocol for identifying TMJ dysfunction. Differentiate and recognize normal and pathological conditions of the structures of the TMJ in the closed and open mouth positions. 
Read more Background MRI is the gold standard for the differential diagnosis of normal and pathological joint components, as it best visualizes the joint components. Gross TMJ anatomy in the closed and open mouth positions in sagittal and coronal views is shown in Fig. 1, 2. The proposed scanning protocol for assessing TMJ dysfunction is shown in Fig. 3. In addition to the scanning protocol, note in Fig. 4 that the articular disc is better differentiated on the PD with a long TE =39-49,...
Read more Findings and procedure details TMJ located between three articulating surfaces (Fig. 7):-the mandibular fossa of the temporal bone;-the articular eminence of the temporal bone;-the condylar process of the mandible.The articular disc (Fig. 8) is comprised of fibrocartilage and has a biconcave shape with a thin center and thickened periphery. The thickened anterior and posterior parts are called the anterior and posterior bands respectively. The thinner central part is the intermediate zone.The retrodiscal (bilaminar) zone (Fig. 9)  is located between the posterior band of the...
Read more Conclusion MRI is the gold standard due to its superior contrast resolution. Understanding the anatomic and pathologic features of all joint components is necessary to assess the position of the articular disc: capsular thickenings can mimic the articular disc. Short scanning time tmj dynamic allows maximum mouth opening, which eliminates false-positive results of a stuck TMJ disc. The articular disc is better differentiated on PD with long TE (39-49), between T2 (TE=80-100) and PD (TE= 20-30).
Read more References 1. Whyte, Andy & Phoon Nguyen, Amanda & Balasubramaniam, Ramesh & Boeddinghaus, Rudolf. (2020). Imaging of temporomandibular disorder and its mimics. Journal of Medical Imaging and Radiation Oncology. 65. DOI: 10.1111/1754-9485.13119 - ReseachGate2. Gaillard F, Walizai T, Sharma R, et al. Temporomandibular joint. Reference article, Radiopaedia.org (Accessed on 08 Dec 2025) https://doi.org/10.53347/rID-54533. Gaillard F, Knipe H, Rasuli B, et al. Temporomandibular joint dysfunction. Reference article, Radiopaedia.org (Accessed on 08 Dec 2025) https://doi.org/10.53347/rID-55354. Gaillard F, Bell D, Knipe H, et...
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