title: Magnetic resonance imaging in the evaluation of temporomandibular joint disc displacement--a review of 144 cases.
abstract: One hundred and forty four patients underwent magnetic resonance imaging (MRI) for evaluation of suspected internal derangement (ID) of the temporomandibular joint (TMJ). All scans were performed on a state-of-the-art scanner by highly experienced technologists and evaluated by a single Head and Neck/Maxillofacial radiologist. Seventy-nine percent of patients were female and 21% male. Age distribution of the cases was bi-modal with first peak at 20-30 years of age and second peak at 50-60 years of age. Of the 82.5% of cases with disc displacement, 59.5% demonstrated reduction with opening and 40.5% did not reduce. Anterior disc displacement is common (44%) and sideways displacement rare (4%). Antero-lateral displacement was the second commonest type of displacement (29%) probably related to the weakness of the lateral disc attachment.
authors.affiliation: MRI Centre, 127 Hamersley Road, Subiaco, WA 6008, Australia. drwhyte@perthradclinic.com.au
authors.forename: A M
authors.initials: AM
authors.lastname: Whyte
authors.forename: D
authors.initials: D
authors.lastname: McNamara
authors.forename: I
authors.initials: I
authors.lastname: Rosenberg
authors.forename: A W
authors.initials: AW
authors.lastname: Whyte
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D004204:Joint Dislocations / Q000453:epidemiology / Q000473:pathology*; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D019224:Temporomandibular Joint Disc / Q000293:injuries / Q000473:pathology*; D013705:Temporomandibular Joint Disorders / Q000453:epidemiology / Q000473:pathology*