A comparison of stability and clinical outcomes in single-radius versus multi-radius femoral design for total knee arthroplasty

J Arthroplasty. 2014 Dec;29(12):2402-6. doi: 10.1016/j.arth.2014.03.033. Epub 2014 Mar 31.

Abstract

We compared the intraoperative varus-valgus stability from 0° to 90° of flexion and postoperative clinical outcomes in patients receiving TKA via either a single-radius femoral design (50 TKA, SR group) or multi-radius femoral design (50 TKA, MR group). We measured stabilities at 0°, 30°, 60° and 90° of flexion using a navigation system. The clinical outcomes including HSS scores, WOMAC scores and VAS score during stair climbing were compared after a minimum of 2-year follow-up. The single-radius femoral designs in TKA showed better intra-operative stability at 30° of flexion (7.6 vs. 8.3) compared with the multi-radius femoral design, but not at other angles. However, the clinical outcomes revealed no other significant differences in terms of HSS scores, WOMAC scores and VAS score between two groups.

Keywords: clinical outcome; multi-radius; single-radius; stability; total knee arthroplasty.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Aged, 80 and over
  • Arthroplasty, Replacement, Knee* / adverse effects
  • Bone Malalignment / etiology
  • Bone Malalignment / prevention & control
  • Female
  • Femur / surgery*
  • Humans
  • Joint Instability / etiology
  • Joint Instability / prevention & control
  • Knee Prosthesis*
  • Male
  • Middle Aged
  • Osteoarthritis, Knee / surgery*
  • Range of Motion, Articular
  • Treatment Outcome