Oral and maxillofacial radiology
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Sole radiographic expression of rheumatoid arthritis in the temporomandibular joints: a case report

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We present an unusual case of rheumatoid arthritis. The patient had no radiographic findings in any joints of the body expected to show symptoms of the disease, such as phalangophalangeal joints of the hands and metacarpophalangeal joints. Instead, the patient had radiographic findings in the temporomandibular joints, which are not commonly involved in the disease and its activity.

Section snippets

Case report

The patient was a woman aged 39 years who had rheumatoid arthritis diagnosed for 3 years. She had severe preauricular muscle pain, tenderness, and stiffness, with repetitive clicking sounds upon mouth opening, closing, and lateral excursion. The TMJ functional index measured 0.54 on a scale of 0 to 1, where healthy individuals score between 0 and 0.1. The TMJ functional index was reassessed after 1 week by the same examiner (without altering the antiarthritic therapy) to ensure intraexaminer

Discussion

The involvement of TMJ in RA has been demonstrated in over 50% of RA patients.5, 6, 12 Clinically there is preauricular pain or sensitivity during joint movement. The joints are tender upon pressure, and there is morning stiffness usually lasting more than 30 minutes and leading to decreased masticatory force. Additional findings, though not as frequent, include decreased joint mobility and occlusal disharmony.5, 6, 12

Radiographic lesions in rheumatoid arthritis generally do not appear in the

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