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Zimmer Nexgen CD-Flex Knee Replacement

South Carolina Knee Replacement Attorneys

Surgeons Report High Failure Rates

Zimmer NexGen Knee Replacement Failure | Pennsylvania Injury AttorneyThe Zimmer NexGen® CR-Flex Porous Femoral components have been associated with increasingly high incidences of:

  • Knee replacement failure
  • Revision knee surgery
  • Painful loosening of replacement knee


In the New York Times article (“Surgeon vs. Knee Maker: Who’s Rejecting Whom?”) Dr. Berger states the knee replacement is designed to last for up to 15 years, but some x-rays showed where the implant met the thighbone, an indication that the device was loose and had not fused completely in less than two years.

The exact reason for the device’s failure is unclear; while Dr. Berger’s study states other “cementless” brands demonstrate excellent osseointegration and low revision rates. This leads most critics of the device to point to design flaws as a possible reason for the high failure rate.

What is the Zimmer NexGen®?

The Zimmer NexGen® CR-Flex Porous Femoral knee replacement system is designed to connect the tibia with the knee. The device is fused to the bone on the cap of the thighbone through the use of cobalt-chromium-molybdenum alloy and porous fiber metal that mimics human bone.

In a filing with the Securities and Exchange Commission, Zimmer states that more than 150,000 Zimmer NexGen knee implants have been sold since 2003. Many Orthopedic surgeons have found the Zimmer knee devices to have unacceptably high failure rates.

Study Shows Over A Third Of Knee Replacements Loose

According to a two year study (“The High Failure Rate of a High-Flex Total Knee Arthroplasty Design”) presented at the 2010 American Academy of Orthopaedic Surgeons annual meeting by Dr. Richard Berger and Dr. Craig Della Valle of the Rush University Medical Center, 120 patients were implanted with the device during a period between July and October 2005.

Out of the 120 hybrid knees, 108 (90%) knees were clinically evaluated for osseointegration (“the formation of a direct interface between an implant and bone, without intervening soft tissue). 39 of the 108 cases (36%) are loose. Moreover, many of these 108 cases (9.3%) have had revision or impending revision for painful loosening.

If you have had a knee replacement surgery and think you may have a Zimmer NexGen® CR Flex device, you may be entitled to compensation. Contact an experienced injury attorney at the Stampfle Law Firm today for a FREE Consultation on 1-843-839-3377.

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