In the last 10 years, the use of unicompartmental knee replacement (UKR) instead of total knee replacement (TKR) has increased, especially in young patients. This surgical technique can be used if ligament stability is maintained and the femoropatellar joint and medial or lateral femorotibial compartment are intact. UKR is less invasive than total replacement in terms of tissue sparing and it permits a more physiologic articular restoration. As good results in terms of survival rate continue to be reported in the literature, the number of unicompartmental implants has increased but so has the revisions rate [1, 2].
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