Effect of Total Knee Arthroplasty Implant Position on Flexion Angle Before Implant-Bone Impingement

Hideki Mizu-uchi, Clifford W. Colwell, Shuichi Matsuda, Cesar Flores-Hernandez, Yukihide Iwamoto, Darryl D. D'Lima

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

We generated patient-specific computer models of total knee arthroplasty from 10 patients to compute maximum flexion angle before implant-bone impingement. Motion was simulated for 5 different femoral implant positions and 11 different tibial insert positions at 4 different tibial posterior slopes. In the neutral position, the mean maximum flexion angle was 136.3°. The range because of anatomical variation among patients was 13.0°. A combination of 2-mm posterior translation of the femoral component with a 10-mm anterior translation of the insert and a 7° posterior slope increased flexion by a mean of 14° relative to the neutral position. The rate of change in flexion angle was 0.4°/mm to 1.5°/mm with respect to implant position and 1.5°/mm increase in the posterior condylar offset.

Original languageEnglish
Pages (from-to)721-727
Number of pages7
JournalJournal of Arthroplasty
Volume26
Issue number5
DOIs
Publication statusPublished - Aug 2011

All Science Journal Classification (ASJC) codes

  • Orthopedics and Sports Medicine

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