DePuy Knee Replacement Lawsuits

Hundreds of thousands successful knee replacement surgeries performed each year in the U.S., but some people may experience debilitating side effects and complications. Medical device maker DePuy is facing numerous lawsuits filed by people who experienced severe side effects or required revision surgery after getting a DePuy Attune or DePuy Sigma knee replacement implant.

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  • DePuy Attune Knee Replacement
  • DePuy Sigma Knee Replacement
  • DePuy Sigma and Attune Knee Recalls
  • DePuy Knee Replacement Complications
  • DePuy Sigma and Attune Knee Replacement Claims

DePuy Attune and Sigma knee replacement products were designed to provide better stability and be longer lasting for a younger, more active patient. While most surgeries have been successful, many people who received DePuy Attune or Sigma knee replacement devices have experienced serious complications after their implant failed to perform as expected.

In addition, the U.S. Food and Drug Administration has received a high number of adverse event reports filed over complaints and complications caused by the devices.

Many of these recipients have filed DePuy Knee Replacement Lawsuits to seek compensation for their injuries including:

  • Early device failure
  • Severe pain
  • Joint instability
  • Bone loss and Fracture
  • Nerve and tissue damage
  • Joint revision surgery

The first DePuy knee replacement lawsuit was filed in 2017 for injuries caused by the DePuy Attune knee device. Additional cases have followed, including a number of DePuy Sigma knee lawsuits. DePuy and parent company, Johnson & Johnson are expected to face hundreds or even thousands of knee replacement lawsuits over the Sigma and Attune knee devices.

DePuy Attune Knee Replacement

The DePuy Attune knee system is a total knee replacement device which replaces both the upper and lower portions of the knee joint. It was designed to improve natural movement and result in quicker recovery, intended for a younger, more active patient. DePuy Attune is constructed of a Cobalt-Chromium alloy, and a proprietary polyethylene plastic.

The DePuy Attune system was first approved in 2010 and the company, DePuy Synthes introduced two improvements to the device in 2014. The addition of a rotating platform design and an artificial patella were intended to reduce implant wear and improve range of motion, while maintaining stability.

Problems with the Attune Knee Device have included:

  • Loosening
  • Bone fractures
  • Unexpected wear and tear
  • Early device failure
  • Revision surgery

Some of these complaints are documented in a 2017 study published in the Journal of Knee Surgery and have been echoed in medical device adverse event reporting to the FDA. The first DePuy Attune Knee Replacement Lawsuit was filed in 2017.

DePuy Sigma Knee Replacement

DePuy Sigma Total Knee system is an older system that was approved in 1996 and is marketed as a comprehensive, integrated knee system. Its design was based a prior version, the PFC system and was said to be an improvement, giving surgeons a number of options to personalize the implantation depending on the individual patient needs.

The Sigma knee system employs fixed bearing technology or rotating platform technology and utilizes a highly-polished cobalt-chromium construction with rounded geometry, along with proprietary antioxidant polyethylene components which are intended to reduce wear and prevent oxidation.

A system named “TRUMATCH” Personalized Solutions is offered to improve preoperative planning for better patient matching which ins intended to reduce complexity and reduce surgical time.

Problems with the Sigma knee system have included:

  • Joint instability
  • Severe pain
  • Early wear and tear
  • Bone loss
  • Revision surgery

Some of these complications have been included in several studies and journal articles including publication in Clinics in Orthopedic Surgery and the Journal of Arthroplasty. The first DePuy Sigma Knee Replacement Lawsuit was filed in 2018.

DePuy Sigma and Attune Knee Recalls

Though no large recall has been issued for the DePuy Attune Knee replacement system or components, the company has been required to issue voluntary recalls for instruments associated with the DePuy Attune knee system and for certain portions of the Sigma line.

In 2009, A class 2 recall was issued for a component of the DePuy Sigma Knee System after a risk of crack formation was discovered. In 2012, a voluntary recall was issued for Sigma devices after the FDA warned DePuy that it had failed to seek approval for commercial sale of certain devices. Once the concerns were addressed, the devices returned to market.

DePuy has also faced recalls and warnings for other surgical and joint replacement devices including surgical tools, hip replacements,

DePuy Knee Replacement Complications

Over 700,000 knee replacement surgeries are performed each year in the U.S., many of them using DePuy devices. The Sigma knee system has been implanted in an estimated 1.7 million patients since its approval and the Attune system, though newer, has been just as popular.

Though most surgeries are successful, patients who experience device failure can be subjected to debilitating side effects and complications.

Severe side effects of the DePuy Sigma and Attune knee implants have included:

  • Inflammation, bruising or swelling
  • Severe pain
  • Infection
  • Blood clots
  • Nerve and blood vessel damage
  • Knee dislocation
  • Bone fractures
  • Bone dissolution or bone death

Severe side effects and complications may cause severe pain, loss of function and result in disability. In order to address complications, a joint revision surgery may be required to remove and replace a faulty device with a new, functioning artificial joint. In some cases, joint reconstruction may be needed and may require more than one repeated surgery.

DePuy Sigma and Attune Knee Replacement Claims

Lawsuits filed by people who were injured, experienced complications or required revision surgery after a DePuy Attune or Sigma knee device was implanted have claimed that Johnson & Johnson and its device subsidiary, DePuy:

  • Designed and produced defective devices
  • Failed to warn the public about risks of complications
  • Failed to issue recalls appropriately
  • Marketed products as safe and effective despite risks

People who were injured or required revision surgery after receiving a DePuy knee implant may be eligible for compensation for their injuries and should seek legal advice. Past medical injury lawsuits have provided compensation for medical costs, pain and suffering, loss of wages, future medical costs and in some cases, punitive damages.

Notwithstanding claims relating to this product, the drug/medical device remains approved by the U.S. FDA.



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