Abstract
The term anteromedial osteoarthritis of the knee joint was first established in 1991 by White et al. and describes an isolated osteoarthritis of the medial tibiofemoral compartment with intact posterior tibial cartilage in patients with a functionally intact anterior cruciate ligament and occurs in about 30 % of all patients with clinically relevant gonarthrosis. In these patients, there is the possibility for minimally invasive unicondylar knee arthroplasty. One of the most commonly used prosthesis with long-term experience is the Oxford Uni knee prosthesis (Biomet UK Limited, Swindon, UK). The most recent phase of development of this prosthesis focused on improving the reliability of the instruments (Microplasty) which allows a more reproducible execution of the operation to help eliminate early failure due to surgical errors. In the following article, the essential surgical steps of minimally invasive implantation of the Oxford Uni with the Microplasty instrumentation in a patient with severe anteromedial osteoarthritis of the knee joint are demonstrated and explained.
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