M.N.Tahmasebi,MD,RCSC, Professor of Knee Surgery TUMS Shariati Hospital Isfahan,1394 Pre-operative planning in UKA and the role of Patella New era in Arthroplasty The more The knee surgeons do UKA The less complications are reported.(JBJS 2015) The more The knee surgeons do UKA The less complications are reported.(JBJS 2015) Definition Unicompartmental knee arthroplasty: Prosthetic replacement of one compartment of the tibio-femoral joint, either medial or lateral, addressing the primary or secondary osteoarthritic narrowing of the joint rim, with the purpose to regain the pristine alignment of the limb and painless motion UKA May be suitable for 5-30% of TKA recipients Arno et al, J arthroplasty 2011 Robertsson et al, Acta Orthop 2010 Willis-Owen et al, Knee2009 Murray et al, JBJS-B 1998 Fumes et al, JBJS-A 2007 Kosikene et al, Acta Orthop 2008 UKA Young Patient 92% survivorship at 11 years < 60 yo Swienckowski et al, JBJS-A % survivorship at 12 years < 65 yo 83.4% return to sporting activities Felts et al, Ortho Traumatol surg res 2010 PREOP EVALUATION KEYS Three arms of the evaluation: History, physical examination, and imaging. Preop evaluation: clinics kozinn and scott, JBJS 1989 kozinn and scott, JBJS Age >60 y/o - Age >60 y/o -Weight