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TKR: Saggital Alignment of the Femoral Component:

- Femoral Alignment Rod: anterior/posterior considerations: (avoid saggital cutting errors);
       - this is inserted w/ care not to insert it too posteriorly, which would have the effect of flexing the femoral component;
       - if the starting point is too anterior, femoral component will be extended, and there is a tendency to oversize the
              component (and femoral notching);
              - in addition, anterior starting point, also leads to component in extension.
       - if the starting point is too posterior, then the femoral component is slightly flexed and the comonent will be undersized;
       - references:
              - Association Between Femoral Component Sagittal Positioning and Anterior Knee Pain in Total Knee Arthroplasty: A 10-Year Case-Control Follow-up Study of a Cruciate-Retaining Single-Radius Design.
              - Sagittal Cutting Error Changes Femoral Anteroposterior Sizing in Total Knee Arthroplasty.
              - Surface damage on open box posterior-stabilized polyethylene tibial inserts.
              - Increased flexion position of the femoral component reduces the flexion gap in total knee arthroplasty.
              - Sagittal flexion of the femoral component affects flexion gap and sizing in total knee arthroplasty.
              - Sagittal plane positioning of the femoral component in total knee arthroplasty
              - Sagittal plane alignment of the femoral component in TKA CAOS vs manual
              - Surface damage on open box posterior-stabilized polyethylene tibial inserts.
              - Sagittal Cutting Error Changes Femoral Anteroposterior Sizing in Total Knee Arthroplasty