Radiographic evaluation of factors affecting bearing dislocation in the domed lateral Oxford unicompartmental knee replacement
作者： A. Gulati , S. Weston-Simons , D. Evans , C. Jenkins , H. Gray
DOI: 10.1016/J.KNEE.2014.08.008
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摘要: Abstract Background The rate of bearing dislocation with the domed lateral Oxford Unicompartmental Knee Replacement (OUKR) in different series varies from 1% to 6% suggesting that is influenced by surgical technique. aim this study was identify factors associated dislocation. Methods Aligned post-operative antero-posterior knee radiographs seven knees had dislocated and 87 control were compared. Component alignment position assessed. All dislocations occurred medially over tibial wall. Results Knees tended be overcorrected: Compared those did not dislocate, they 2° less valgus (p = 0.019) components positioned 2 mm more proximal (p Conclusions To minimise risk it recommended should overstuffed. This best achieved selecting thickness just tightens ligaments full extension, re-cutting tibia if necessary. In addition gap between femoral through which dislocates, component implanted neutral rotation internally rotated. Level evidence IV
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