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Facts & Figures

Helping your patients
“forget” their new knee


Partial Knee replacement is Personalized Knee Replacement.


“The patient’s ability to ‘forget’ their joint replacement during everyday activities is an important expectation and goal of the surgery, as it reflects patient satisfaction.”1 Research has shown that PKR patients are more likely to forget their joint replacement than TKR patients.1, 2

The Forgotten Joint Score is used to evaluate patients’ ability to forget their joint replacement in daily life. The score ranges from 0 to 100, with 100 being the optimal score. FJS scores for PKR were significantly better than for TKR at 6 and 12 weeks, and 6 and 12 months (p < 0.001).1

These findings were attributed to the more personalized nature of PKR, which “conserves more soft tissue and bone than TKR.“1

  1. Peersman G, Verhaegen J, Favier B. The forgotten joint score in total and unicompartmental knee arthroplasty: a prospective cohort study. Int Orthop. 2019 Dec;43(12):2739-2745. doi: 10.1007/s00264-019-04342-w. Epub 2019 May 21. PMID: 31115598. Find the source here.
  2. Zuiderbaan HA, van der List JP, Khamaisy S, NawabiDH, Thein R, Ishmael C, Paul S, Pearle AD (2017) Unicompartmental knee arthroplasty versus total knee arthroplasty: which type of artificial joint do patients forget? Knee Surg Sports Traumatol Arthrosc. 25(3):681–686. Find the source here.
  3. Willis-Owen CA, Brust K, Alsop H, Miraldo M, Cobb JP. Unicondylar knee arthroplasty in the UK National Health Service: an analysis of candidacy, outcome and cost efficacy. Knee. 2009 Dec;16(6):473-8. doi: 10.1016/j.knee.2009.04.006. Epub 2009 May 22. PMID: 19464898. Find the source here.

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