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Oxford medial unicompartmental arthroplasty for focal spontaneous osteonecrosis of the knee

A J Langdown, H Pandit, A J Price, U Svard, D W Murray, C A F Dodd & C L M H Gibbons, 2005

Acta Orthopaedica 76(5): 688-92

Spontaneous osteonecrosis of the knee (SONK) is a distinct clinical condition occurring in patients without any associated risk factors. There is controversy as to the best method of treatment, and the available literature would suggest that patients with SONK have a worse outcome than those with primary osteoarthrosis when arthroplasty is performed. We assessed the outcome of medial unicompartmental knee arthroplasty (UKA) using the Oxford prosthesis for end-stage focal spontaneous osteonecrosis of the knee (SONK; Ahlbäck grades III & IV).

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