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Poster presented at: 2014 meeting of the American Academy of Orthopaedic Surgeons in New Orleans, Louisiana



  • Posterior-stabilized (PS) TKA that sacrifice the cruciate ligaments improves pain and function in patients with advanced osteoarthritis.
  • Patellar crepitus appears to be due to a spectrum of peripatellar fibrosynovial formations and is usually encountered after PS-TKA, which uniquely has an intercondylar box to accept the tibial post.
  • Symptoms of patellar crepitus occur most commonly during terminal knee extension and occur usually from 3 to 9 months after PS-TKA, and in some cases, this phenomenon is symptomatic enough to warrant an arthroscopic procedure or open arthrotomy.
  • The development of patellar crepitus after PS-TKA appears related to many factors such as femoral component design, surgical errors, increased postoperative knee flexion, and postoperative patellar baja, which are also responsible for patellar clunk syndrome.

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