Surgical device

A surgical device for aligning an extramedullary alignment rod during a total knee arthroplasty, the surgical device comprising:

• a supporting portion having at least two supporting geometries separated from one another along a supporting line that extends in a proximodistal direction and are each adapted for support on an anterior edge of a tibia;
• and
• a reference portion that projects in an anterior direction from the supporting portion and has at least two reference geometries separated from one another along a reference line that extends in the proximodistal direction,
• the reference line being separated from the supporting line by an anterior distance and extending parallel to the supporting line,
• the at least two reference geometries and/or the reference line serving as a reference for aligning the extramedullary alignment rod instead of the anterior edge of the tibia,
• the at least two reference geometries each adapted for at least mediolaterally form-fit mounting of the extramedullary alignment rod.