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Are high-resolution ultrasonographic signs of disc displacement valid?
Rüdiger Emshoff1, Siegfried Jank, Ansgar Rudisch
1Department of Oral and Maxillofacial Surgery, University of Innsbruck, Innsbruck, Austria. Rudiger_Emshoff@hotmail.com
Purpose:
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).
Materials And 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.
Conclusion:
The PPV for the HR-US diagnosis of disc displacement is high.