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MAGNETIC RESONANCE IMAGING FEATURES OF THE TEMPOROMANDIBULAR JOINT IN PATIENTS WITH INTERNAL DERANGEMENT PRESENTING WITH LIMITED MOUTH OPENING
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Abstract
Across-sectional descriptive study was conducted at Hanoi Medical University Hospital from August 2023 to July 2025 on 116 temporomandibular joints (TMJ) clinically diagnosed with internal derangement presenting with limited mouth opening. All patients were evaluated for the symptom of restricted mouth opening, and the maximal interincisal opening was measured before undergoing magnetic resonance imaging (MRI) of the TMJ. MRI images were analyzed for disc morphology, disc position, and condylar changes in this patient group. Internal derangement with limited mouth opening was found to be more common in females, with a female-to-male ratio of 1,97 and the mean age of the patients was 24.68 ± 12.1 years, most of whom were in the working-age group. The most frequent disc deformation was the folded type, observed in 33 joints (33.6%). Anterior disc displacement with a disc-condyle angle greater than 30° accounted for the majority of cases (78.4%), and most of these patients already showed evidence of condylar damage at varying degrees (62.9%).
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Keywords
Temporomandibular joint disorder, magnetic resonance imaging, limited mouth opening.
References
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