Unicompartmental knee arthroplasty - Wikipedia, the free encyclopediaUnicompartmental knee arthroplasty is a surgical procedure used to relieve arthritis in one of the knee compartments in which the damaged parts of the knee are replaced.Surgical Treatment of Medial Compartment ArthritisOptimal surgical management of the unicompartmental osteoarthritic knee has eluded the orthopedist for decades.Unicompartmental Knee Replacement - OrthoInfo - AAOSYour doctor may recommend partial knee replacement if your arthritis is confined to a single part (compartment) of your knee. Your knee is divided into three major ...