Fig. 2From: Equivalent outcomes of ACL revision with over-the-top single and double-bundle reconstruction using hamstring tendon compared to anatomical single and double-bundle reconstructionOperative procedure. a, Single (Mal-position): A primary bone tunnel (arrow head) was mal-positioned and a new single bone tunnel (arrow) was created. b, Single OTTR (Enlargement of primary bone tunnel):A new bone tunnel could not be created due to enlargement and the OTTR procedure was chosen. c, Single-Double (Mal-position):A primary bone tunnel (arrow head) was mal-positioned and new bone tunnels (arrow) of AM and PL bundle were created. d, Single-Double / AM OTTR (Re-injury case); We chose to use a primary tunnel (arrow head) for PL bundle. OTTR was selected for AM bundle because there was a risk of coalition when a primary AM tunnel (arrow) was used. The femoral side was fixed with a staple in the OTTR procedure and with Endo-Button CL in the bone tunnel procedure, and the tibial side was fixed with a staple in all casesBack to article page