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J Am Acad Orthop Surg, Vol 16, No 1, January 2008, 9-18.
© 2008 the American Academy of Orthopaedic Surgeons
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Unicompartmental Knee Arthroplasty

Todd Borus, MD and Thomas Thornhill, MD

Dr. Borus is Orthopaedic Surgeon, Northwest Surgical Specialists, Vancouver, WA. Dr. Thornhill is Chair, Department of Orthopaedic Surgery, Brigham and Women’s Hospital, Boston, MA.

Neither Dr. Borus nor a member of his immediate family has received anything of value from or owns stock in a commercial company or institution related directly or indirectly to the subject of this article. Dr. Thornhill or a member of his immediate family has received research or institutional support from DePuy, Smith & Nephew, and Biomet, has received royalties from DePuy, and has stock or stock options held in Conformis.

Reprint request: Dr. Thornhill, Department of Ortthopaedic Surgery, Brigham and Women’s Hospital, 75 Francis Street, Boston, MA 02115.

Recent increased interest in less invasive surgical techniques has led to a concurrent resurgence in unicompartmental knee arthroplasty. The procedure has evolved significantly over the past three decades. Proponents of unicompartmental knee arthroplasty cite as advantages lower perioperative morbidity and earlier recovery. Both clinical outcome and kinematic studies have indicated that successful unicompartmental knee arthroplasty functions closer to a normal knee. Recent reports have demonstrated success in expanding the classic indications of unicompartmental knee arthroplasty to younger and heavier patients. Both fixed- and mobile-bearing implants can yield excellent clinical outcomes at >10 years, but with different modes of long-term failure. Proper execution of surgical technique remains critical to optimizing outcome. Long-term studies are needed to appropriately define the role of less invasive unicompartmental surgical approaches as well as the role of computer navigation.






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Copyright © 2008 by the American Academy of Orthopaedic Surgeons.