Arthroscopic views of the right knee during surgery.

Arthroscopic views of the right knee through anteromedial (A-G) and anterolateral portals (H-L). (A) A 3.5-mm guide pin is inserted with a reference point at the center portion of the anterior cruciate ligament (ACL) femoral attachment behind the resident’s ridge. (B) A round bone tunnel with a diameter of 6.0 mm is created in a retrograde manner with the Short FlipCutter II. (C, D) The dilator is set on the 3-mm RetroDrill Guide Pin using the RetroConstruction Drill Guide within the knee joint. (E) The rounded edge of the rectangular retro-dilator is inserted into the femoral bone tunnel. (F, G) After the dilator’s direction is confirmed, the dilator is pulled into the femoral bone to about 18 mm depth and the rectangular bone socket is created. (H) A guide pin is inserted with the reference guide at the center portion of the ACL tibial attachment. (I) The dilator is set on the 3.0-mm RetroDrill Guide Pin using the RetroConstruction Drill Guide within the knee joint. (J) The rounded edge of the rectangular retro-dilator is inserted into the tibial bone tunnel. (K) After the dilator’s direction is confirmed, the dilator is pulled out of the tibia and the rectangular bone tunnel is created. (L) Arthroscopic view after retro-dilator anatomic rectangular tunnel bone-patellar tendon-bone (BTB) ACL reconstruction.