Safety and Efficacy of a Rotating-Platform, High-Flexion Knee Design:
Three- to Five-Year Follow-Up
Abstract
Our hypothesis was that a high-flexion rotating-platform posterior stabilized (RP-PS) design could maximize range of motion (ROM) and improve deep-flexion activities. Eighty-seven consecutive patients (109 knees) with high-flexion RP-PS design were prospectively followed up for a minimum of 3 years. Radiographic and clinical outcomes were analyzed using Knee Society Score criteria and Western Ontario and McMaster Universities Osteoarthritis Index. Good to excellent clinical scores were achieved in 96% of the knees. There were no cases of infection, malalignment, loosening, osteolysis, or spinout. The mean preoperative ROM improved from 110.7° to 124° postoperatively. High-flexion activities such as squatting and kneeling were achieved in 62% and 60% of patients, respectively. High-flexion knee implant is safe and improves ROM and deep-flexion activities. Persistent pain is an important cause of dissatisfaction after total knee arthroplasty.
Keywords: total knee arthroplasty, high-flexion knee design, rotating-platform implant
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The Conflict of Interest associated with this article can be found at doi: 10.1016/j.arth.2011.04.013.
PII: S0883-5403(11)00172-0
doi:10.1016/j.arth.2011.04.013
© 2012 Elsevier Inc. All rights reserved.
