anteromedial compartment osteoarthritis (oa) with intact anterior cruciate ligament (acl) by clinical testing and alignment on radiographs;

normal or mild to moderate patellofemoral joint oa

angular deformity <15 degrees passively correctible to neutral;

flexion contracture<5 degrees;

bmi<40;

age 40-80 years

severe pfjoa;

history of previous surgery on the affected knee (excluding simple meniscectomy);

inflammatory arthropathy;

previous contralateral knee replacement surgery or major ligament reconstruction surgery