In 2016 it is estimated that there were 160,000 knee revision surgeries in the US and Europe.1 This indicates that some 4% of all knee implant procedures result from failure of the initial knee implant. In revision, a number of clinical indications lead to the requirement for a stabilized hinged knee.
Hinge constructs made from PEEK-OPTIMA Reinforced and PEEK-OPTIMA Wear Performance offer superior cold-flow resistance2, 3 as well as dimensional stability during the device lifetime (>15 years) compared to traditional hinge mechanisms that use Ultra-high-molecular-weight polyethylene (UHMWPE), to provide constrained stability.1
In addition, the PEEK-OPTIMA polymer has proven biocompatibility and biostability in implantable devices worldwide provides safety, longevity and reassurance to patients and surgeons alike. Unicondylar knee testing reported a 70% reduction in wear compared with literature values for similar UHMWPE-base prostheses.4
Hinged-mechanism constructs made from PEEK-OPTIMA Reinforced or Wear Performance grades have been used in CE and FDA approved revision knee systems since the beginning of 2010. Several thousand knee-revision implants containing these parts are already in clinical use.1
PEEK-OPTIMA is paving the way in knee arthroplasty, with leading applications such as the Aesculap® EnduRo Rotating Hinge Knee System by Aesculap AG5 and MULTIGEN PLUS H Knee by Lima Corporate S. p. a.6