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Monteggia fracture dislocation

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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The M onteggia fracture dislocation is:

  • a fracture of the upper ulna, with
  • dislocation of the radial head

The history is one of a fall, usually with twisting and pronation of the forearm.

Either component may be missed. A dislocated radial head may be obscured by swelling. A high ulna fracture may be mistaken for a fractured olecranon.

A good lateral x-ray is required to fully show the fracture dislocation. The radial head is dislocated forwards and no longer seen pointing directly to the capitulum. The ulna is bowed forwards.

Closed reduction by manipulation may suffice in children but the fracture is so unstable that internal fixation by plating is usually necessary in adults. The arm should be immobilised in plaster for 6 weeks with the elbow held in flexion to prevent redislocation of the radial head.

Occasionally, a 'backward Monteggia' may occur. The radial head is dislocated posteriorly and the ulnar bowed backwards.


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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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