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Anatomic Axis


  • anatomic axis of femur is approx 6 deg of valgus from mechanical axis or 9 deg of valgus from vertical axis w/ variations according to body habitus;
  • anatomic axis of tibia is in approx 2-3 deg of varus from mechanical axis;
  • lines that intersect the tibia and the femur intersect at knee;
    • this angle averages 6 deg