Primitive results after medial-pivot knee arthroplasties. A minimum 5-year follow-up study

Cheng Yu Fan, Justin Tzung Shian Hsieh, Ming-Shium Hsieh, Ying Chieh Shih, Chian-Her Lee

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)


Paradoxical anterior movement of the femoral condyles after total knee arthroplasty (TKA) often attenuates the extension mechanism and causes a suboptimal outcome. The medial-pivot implant design aimed to confine anterior movement and emulate physiologic knee kinematics. In our study, a consecutive series of 58 medial-pivot TKA were enrolled with a minimum 5-year follow-up. The Knee Society score improved from 30.5 to 91.1 in objective and from 36.7 to 82.3 in functional scale. The average range of motion was 115.4°. The medial-pivot TKA provided significant improvement in the postoperative range of motion, objective Knee Society score, pain scale, and functional score (P <.05) statistically. A larger sample and longer follow-up are recommended to draw definitive conclusions of this new implant design.

Original languageEnglish
Pages (from-to)492-496
Number of pages5
JournalJournal of Arthroplasty
Issue number3
Publication statusPublished - Apr 2010


  • Femoral rollback
  • Medial-pivot
  • Paradoxical movement
  • Total knee arthroplasty

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine


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