Are high-resolution ultrasonographic signs of disc displacement valid?
OBJECTIVE
The study goal was to define the positive predictive value (PPV) for the diagnosis of disc displacement of the temporomandibular joint (TMJ) with the use of high-resolution ultrasonography (HR-US).


METHODS
The HR-US reports for 29 patients aged 19 to 62 years who had a prospective clinical diagnosis of TMJ internal derangement were correlated with magnetic resonance results.


RESULTS
For the prospective HR-US interpretation, the PPV for disc displacement was 97% at the closed-mouth position and 88% at the maximum-mouth opening position.


CONCLUSIONS
The PPV for the HR-US diagnosis of disc displacement is high.
Emshoff
Rüdiger
R
Department of Oral and Maxillofacial Surgery, University of Innsbruck, Innsbruck, Austria. Rudiger_Emshoff@hotmail.com
Jank
Siegfried
S
Rudisch
Ansgar
A
Bodner
Gerd
G
D000328:Adult; D005260:Female; D006801:Humans; D004204:Joint Dislocations / Q000000981:diagnostic imaging*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011446:Prospective Studies; D013705:Temporomandibular Joint Disorders / Q000000981:diagnostic imaging*; D014463:Ultrasonography