Inferior Rectus Myositis After Orbital Fracture Repair With the Medpor® Implant in a 38-Year-Old Male Patient.

We report a rare case of inferior rectus myositis related to a Medpor® orbital implant (Stryker Corporation, Kalamazoo, MI, USA) following orbital fracture repair. A 38-year-old gentleman, who underwent uneventful orbital floor fracture repair using a Medpor® implant, presented a week later with a dull ache and acute onset of diplopia on up- and downgaze. The symptoms were gradually relieved after a secondary transorbital, transantral biplanar surgical approach for removal of an orbital Medpor® implant and repair of the orbital fracture. Despite the high success rates seen with Medpor® orbital implants, the body may recognize the implant as foreign and can mount an immune response against it.