Unicompartmental knee arthroplasty (sometimes called unicompartmental knee replacement or partial knee replacement) is done using minimally-invasive surgery (MIS) techniques for the treatment of arthritis.
The small size of the incision and the less-invasive nature of the surgical approach allow patients to recover from the “mini knee” operation much more quickly. Hospital stays are shorter–down to 1 or 2 days for most patients–and the recovery period is much faster. Patients lose less blood experience substantially less pain than traditional knee replacement and often walk unassisted (no cane or walker) within a week or two of the operation. Even many patients who have both knees done at once with this newer technique are able to walk without the assistance of a walker or cane fairly quickly.