Our research is to evaluate the position and length of femoral tunnel, and to examine whether knee stability and clinical functional outcomes are better while using two-portal or three-portal technique .

Arthroscopic anterior cruciate ligament (ACL) reconstruction is one of the most often performed orthopedic surgeries . Restoration of normal anatomy after ACL reconstruction is related to achieve better function and a satisfactory long-term outcomes. The principles for anatomical ACL reconstruction are to functionally reestablish the ACL to its native dimensions, collagen orientation and insertion sites . The basis for the completion of these principles lies in the correct identification of the insertion sites. The conventional 2-portal technique uses the anterolateral portal as the viewing portal and the anteromedial portal as the working portal. the 3-portal technique allows interchangeable use of the portals as a viewing and working portals depending on the specific task that is being performed. The internal joint anatomy, as soft tissue remnants and bony landmarks, should guide the placement of the portals in ACL anatomical reconstruction and that each of the portals has a specific role during ACL anatomical reconstruction . So does the improved visualization through 3-portal technique compared to 2-portal technique have an impact on femoral tunnel position ?

Inclusion Criteria:

1. Age ( 16 - 50 ) .
2. Isolated ACL tear with or without meniscal inj
3. Patient who have undergone ACL reconstruction in the last 5 years in Arthroscopy and sports injuries unit .

Exclusion Criteria:

• 1- Age ( < 16 ) 2- Patient with multi ligamentous inj . 3- Revision ACL tear .

Postoperative evaluation of patients who had previous ACL reconstruction (within terms of inclusion criteria & study sample ) by ct , clinical examination and functional scores .