BACKGROUND: During knee joint arthroscopy an easy orientation is important to achieve an anatomical correct reconstruction. The lateral intercondylar ridge (LIR) as well as the lateral bifurcate ridge (LBR) were described in literature as possible landmarks to find the location for the femoral tunnel placement. The objective of this trial was, to show the feasibility of the LIR and the LBR as landmarks of the femoral attachment of the ACL in all levels of specialization. METHODS: 36 formalin‐phenol‐fixed lower extremities from donations to the anatomical institute were required for this study. All soft tissue, apart from the knee ligament, was removed. The two bundles of the ACL were identified and marked. Afterwards, also the ACL was removed and the origin of the two bundles was marked and photographed. The bone of the intercondylar fossa was exposed and again photographs were taken. All photographs were made in a standardized setting. Using these photographs a trauma surgeon, an anatomist and a medical student had to identify and mark the ridges if discernible. RESULTS: There was a significant difference between the markings of the medical student on the one side and the trauma surgeon resp. the anatomist on the other side. CONCLUSIONS: This trial shows the feasibility of the LBR and LIR as osseous landmarks during arthroscopic surgery of the knee. As these ridges are not easily discernible, the surgeon has to know the anatomy of the intercondylar notch perfectly to stand even a small chance in correctly placing the drill hole in ACL reconstruction. For beginners in arthroscopic surgery, easier identifiably landmarks have to be introduced.
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