Oxford Unicompartmental Knee Arthroplasty With and Without Navigational Unit

Inclusion Criteria for the Oxford Knee * symptomatic unicompartmental knee arthritis major surgery * failed non operative treatment modalities * willing and able to give informed consent * skeletal maturity Exclusion criteria for the Oxford Knee * medical conditions that preclude general or spinal anesthetic * ipsilateral knee avascular necrosis * severe osteoporosis or osteopenia * neuromuscular impairment * ipsilateral knee infection Patient day surgery criteria * medically stable: an ASA category of 1 or 2 * close proximity to the hospital surgery performed for at least 36 hours * good support system in place- someone able to stay with the patient for at least 36 hours immediately post-op. * hemovac to be removed prior to discharge * access to VON or other home care hospital approved services * pain buster for pain control for 24 to 36 hours