Cine MRI in the evaluation of the Proplast-Teflon TMJ interpositional implant.

Proplast-Teflon (Vitek Inc., Houston, TX, U.S.A.) interpositional implants (PTIPIs) have been removed from the market due to complications that include severe bony destruction of both condyle and fossa as a result of exuberant foreign body giant cell reaction. As per Food and Drug Administration recommendations, the radiologist will often be called to evaluate the status of these implants in the large population that received them. We present a case of bilateral PTIPIs with nonreducing anterior displacement of the meniscal prosthesis made more apparent by cine MRI. Extensive granulomatous reaction in the temporal bone exhibited mobility with cine.