Unicompartmental knee arthroplasty

Alternative Names

Partial knee replacement; Knee replacement – partial; Unicondylar knee replacement; Arthroplasty – unicompartmental knee; UKA; Minimally invasive partial knee replacement

Definition of Unicompartmental knee arthroplasty

Unicompartmental knee arthroplasty (UKA) is surgery to replace either the inside (medial) or outside (lateral) compartments of the knee.


C. Benjamin Ma, MD, Assistant Professor, Chief, Sports Medicine and Shoulder Service, UCSF Department of Orthopaedic Surgery. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc. – 12/20/2010

Knee joint
The structure of a joint
Partial knee replacement - series

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