Staging of internal derangements of the TMJ with magnetic resonance imaging: preliminary observations.
Although MRI has been reported to be accurate in diagnosing displaced TMJ menisci, it has not been used to characterize the condition of the meniscus. A staging system of internal derangement of the TMJ using MRI signal characteristics and morphology of the meniscus is presented. A normal meniscus has the appearance of a small "drumstick" and is positioned superiorly on the mandibular condyle. It produces a small amount of intermediate signal on the MRI. A grade 1 displaced meniscus has normal shape and signal; a grade 2 meniscus has normal shape and absent signal; a grade 3 meniscus has abnormal shape and absent signal. There was a significant correlation between meniscus grade and chronicity of symptoms, severity of pain, and presence of degenerative joint disease in 62 joints (39 patients).
Helms
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CA
Doyle
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Orwig
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D
McNeill
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Kaban
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D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D004204:Joint Dislocations / Q000145:classification* / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D013705:Temporomandibular Joint Disorders / Q000145:classification* / Q000473:pathology