Hypertranslation of mandibular condyle

Case contributed by Dr Utkarsh Kabra


Left TMJ pain since 1.5 months apparently triggered after wide yawning.

Patient Data

Age: 70 years
Gender: Female

Left side (upper images within the stacks):

Normal morphology of intra-articular disc in closed-mouth position on the left side (first stack).

In open mouth position (second stack), there is increased translation of left mandibular condyle with apex of left mandibular condyle lying anterosuperiorly to the apex of the articular eminence. Anterior band of articular disc is seen close to the apex of mandibular condyle and posterior band is seen posterior band of articular eminence. 

Right side (lower images within the stacks):

The intra-articular disc appears deformed on right side with anterior displacement in closed-mouth position (first stack).

In open mouth position (second stack), intra-articular disc reduces only partially in between the articular eminence and condyle.

Small marginal osteophytes are seen along mandibular condyles bilaterally. 

No significant effusion seen.

Case Discussion

Above findings are suggestive of hypertranslation / hypermobility of left TM joint; deformed anteriorly displaced intra-articular disc on the right side with incomplete reduction.

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Case information

rID: 70638
Published: 29th Aug 2019
Last edited: 2nd Sep 2019
System: Head & Neck
Inclusion in quiz mode: Included
Institution: Getwell Poly Clinic & Hospital

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