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J Am Dent Assoc, Vol 132, No 6, 753-761. © 2001 American Dental Association

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Background. The authors conducted a study to investigate the relationship between the presence of temporomandibular joint, or TMJ, pain and magnetic resonance imaging, or MRI, findings of internal derangement, or ID, and arthritis, or OA.

Methods. The authors studied 131 consecutively seen TMJ pain patients. Their criteria for including a patient in the study were report of unilateral orofacial pain referred to TMJ and the presence of unilateral TMJ pain during palpation, function, and unassisted or assisted mandibular opening. The authors took bilateral sagittal and coronal MRIs to establish the presence or absence of TMJ ID, OA or both.

Results. When the authors compared TMJ side–related data from all subjects, they found a significant relationship between the clinical findings of TMJ pain and the MRI diagnoses of TMJ ID (P = .000) and TMJ OA (P = .013). They also found a significant relationship between the MRI diagnosis of TMJ ID type and that of TMJ OA (P = .000). The authors used the statistical test and found poor diagnostic agreement between the presence of TMJ pain and the MRI diagnosis of TMJ ID ( = 0.21), TMJ OA ( = 0.15), and TMJ ID and OA combined ( = 0.18).

Conclusions. The study’s findings suggest that while clinical pain is related to TMJ-related MRI findings, the presence of clinical pain is not a reliable predictor of TMJ ID, OA or both.

Clinical Implications. Using MRI to supplement clinical findings of TMJ pain appears warranted and necessary to establish the presence or absence of TMJ ID.

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