Zimmer Inc., one of the largest knee implant manufacturers in the world, recently voluntarily recalled thousands of "Persona Knee" implants.  The FDA then issued a warning that the devices may loosen prematurely and lead to complications.  11,658 "Zimmer Personal Trabecular Metal Tibial Plate" knee implants are affected by the recall and warning.  One of the defects is that the knee can produce radiolucent lines - that is, large gaps in between the knee replacement components or between the components and the bone.  This can lead to joint fluid, tissue and debris to lodge in the cracks and cause bone damage.  Loose implants may also cause severe pain, swelling, tissue, and bone damage.  Zimmer's recall informed physicians that patients with this particular type of device may need revision surgery and a new replacement.

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