When using a BTB graft for ACLR, what is the maximum recommended length for the femoral bone block?

When utilizing a bone-tendon-bone (BTB) graft for anterior cruciate ligament reconstruction (ACLR), the maximum recommended length for the femoral bone block is 20mm. This length is optimal as it provides sufficient bone for secure fixation while allowing for adequate incorporation and healing at the graft site. A bone block that is too long may complicate the surgical procedure, as it can lead to potential interference with surrounding anatomical structures, resulting in an increased risk of complications such as graft failure or improper graft tensioning. Moreover, a 20mm femoral block has been found to achieve a good balance between stability and the potential for integration into the femoral tunnel, promoting better biomechanical properties during recovery and rehabilitation.