Zimmer (ZMH) Recalls 40,000 NexGen Knee Models

Zimmer Manufacturing initiated another sweeping recall on one of its artificial knee implants, the NexGen MIS Tibial Component, this time because one of the pieces could loosen or fail because of shoddy manufacturing. Zimmer said the threads on the NexGen Complete Knee Solution Tibial Component might be �out of specification� in more than 40,000 devices. In its letter to medical Doctors, Zimmer said some of the tibial baseplates were made with defective threads in a hole where surgeons screw in a drop-down stem extension or stem plug. If not threaded correctly, the device could loosen and fail.