Abstract

The anterior cruciate ligament (ACL) is a continuum of fibers, which is organized in multiple small fascicles. Based on anatomical and biomechanical findings, it was divided into two main bundles – the anteromedial (AM) and posterolateral (PL) bundles [5–11, 13–17, 20, 24]. Histological investigations showed that AM and PL are separated by a fine septum [11]. Recently there is increasing anatomical evidence that the ACL is flat and that the tibial ACL insertion is in the shape of a “C” with fibers inserting anteromedial (AM) and posteromedial (PM) along the medial tibial spine (see Chap. 1). This new finding is of importance especially for tibial PM bone tunnel placement.

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