Nontraumatic Tibial Polyethylene Insert Cone Fracture in Rotating-Platform Total Knee Arthroplasty.

Arthroplasty Today
Cillian J KeoghDavid Mulcahy

Abstract

We report a case of a fracture through the polyethylene (PE) insert cone in a rotating-platform (RP) primary total knee arthroplasty (TKA) implant. This is the first reported case of cone fracture with this particular implant. This case highlights a 65-year-old female presenting with a 4-month history of knee pain and symptoms of instability 10 years after primary RP TKA. At the time of revision surgery, the PE insert cone was found to be fractured 10 mm from the inferior surface of the PE liner. Analysis suggests that the cone fracture occurred by fatigue failure which caused loosening of the tibial tray. Clinicians should be aware that this is a potential cause of failure with an RP TKA in the setting of symptoms including instability and pain.

References

Jan 1, 1986·The Journal of Arthroplasty·M SoudryC B Sledge
Nov 15, 2000·Arthroscopy : the Journal of Arthroscopic & Related Surgery : Official Publication of the Arthroscopy Association of North America and the International Arthroscopy Association·T KrügerW Hein
Aug 23, 2003·The Journal of Arthroplasty·David HendelMoshe Weisbort
Feb 25, 2010·Journal of Medical Case Reports·Fabio D'AngeloPaolo Cherubino

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