gebhart/patrepeval huggingface dataset:
Bone preparation techniques for cementless fixation of total knee replacement (1991)

Reliable, simple techniques are mandatory for cementless total knee arthroplasty to be successful in a high enough acceptable percentage in current orthopaedic practice. Correct alignment and rigid initial fixation are two prerequisites to successful, durable arthroplasty. Decision making and planning for total knee replacement can be simplified by using 5º to 7º valgus angle at the knee for all patients. When this valgus angle is cut on the distal surface of the femur, and the tibia is cut perpendicular to the long shaft of the tibia, the two angles together produce a 5º to 7º angle at the knee. Bone preparation should remove as little bone stock as possible, and a resection level should be chosen so that ligament attachments maintain their proper distances from the joint surface. Stability of seating of the medial and lateral surfaces of the femoral condyle on adequate bone stock is of utmost importance for fixation of the femoral component. Seating posteriorly and laterally is necessary to transfer weight-bearing loads when the knee is in the flexed position. If this distal and posterior seating and stability cannot be achieved then extensive bone grafting and augmented fixation of the component must be done to restore bone stock.