Tripod fracture

The tripod fracture, also called the zygomaticomaxillary complex or malar fracture, is composed of a set of fractures including the lateral orbital wall, inferior orbital floor, and the zygomatic arch.

Cause:
* direct blow to malar eminence

Clinical features:
* facial bruising/swelling
* flattened malar eminence
* loss of facial sensation below orbit (infraorbital nerve involvement)
* trismus / altered mastication
* diplopia +/- ophthalmoplegia

Fracture line:
* laterall wall of maxillary sinus
* orbital rim +/- infraorbital foramen
* orbital floor
* zygomatico-frontal suture / zygomatic arch

[ Radiology, University of Rochester Medical Center [http://www.urmc.rochester.edu/smd/rad/neurocases/Neurocase191.htm [Facial and Mandibular Fractures, University of Washington [http://www.rad.washington.edu/mskbook/facialfx.html] ]

References


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