Atraumatic Delayed Orbital Hematoma Sixteen Years After Orbital Floor Fracture Repair With Porous Polyethylene Implant.

Porous alloplastic materials such as titanium mesh and porous polyethylene allow for the ingrowth of fibrovascular tissues into the implant; stabilizing the implant and reducing the risk of extrusion and extrusion-related complications (such as hematoma formation). The literature contains 2 specific reports of delayed atraumatic orbital hematomas occurring 8 months and 3 years after orbital floor reconstruction with porous polyethylene implants. In this study, an atraumatic orbital hematoma occurring 16 years after orbital floor reconstruction with a porous polyethylene implant was presented. The hematoma was evacuated and the implant was removed without replacement of a secondary implant. The remaining fibrovascular tissue on the underside of the implant provided enough support of the orbital soft tissues to achieve excellent anatomic and physiologic outcomes.