Meniscal bearing dislocation following minimally invasive Oxford medial unicompartmental knee arthroplasty treated with simple open reduction: Case report

INTRODUCTIONDislocation of polyethylene insert is one of the most common complications of mobile bearing-medial unicompartmental knee arthroplasty (MUKA). Bearing dislocation was diagnosed by radiograph examination in these cases upon trivial injury. CASE PRESENTATIONWe reported one case of meniscal bearing dislocation after an Oxford MUKA treated with a simple open reduction technique. CLINICAL DISCUSSIONSimple open reduction surgery without change of the bearing and the use of knee brace for 6 months was effective in preventing re-dislocation. CONCLUSIONMobile bearing dislocation is one of the most common complications in mobile-bearing MUKA. Besides the prevention of technical errors, usage of UKA with a frequency of 10-15 per year is recommended to increase the surgeon's learning curve.