An unusual cause of oro-antral fistula.

A case of oro-antral fistula associated with an apparent foreign body following antral packing for a zygomatic complex fracture 10 years previously is presented. This was treated by antral exploration, removal of the antral contents and repair of the fistula. The complications of antral packing for zygomatic and orbital floor fractures are reviewed and those situations where antral packing may be the treatment of choice are defined.