MRI evaluation of accuracy of arthroscopic anatomical single bundle ACL reconstruction using hamstring graft

Abstract

Purpose: This study was aimed to determine the accuracy of arthroscopic anatomic single bundle anterior cruciate ligament (ACL) reconstruction using MRI at one year postoperatively. Patients and Methods: This prospective study included 40 patients (34 males and 06 females) who underwent arthroscopic anatomic single bundle ACL reconstruction with hamstring tendon autograft using medial portal technique. The patients were evaluated at one year postoperatively by clinical examination and MRI. The MR images were evaluated for graft location, tunnel location, graft signal intensity, graft quality, and graft ligamentization. Results: The ACL was found to be anatomically reconstructed in 37 (92.5%) cases. The mean sagittal inclination angle of ACL graft was 54 degrees (range 48.6○- 60○). The mean coronal inclination angle of ACL graft was 70.5 degrees. The mean center of tibial tunnel was found to be at 42.6% of AP diameter of tibia (range 35-51%). The mean femoral graft angle (FGA) was 50.5 degrees (range 43.5○-57○). The graft ligamentization was present in 38 (95%) cases. Conclusion: Single bundle ACL reconstruction using medial portal technique results in anatomical location of the graft. MRI is an excellent tool to evaluate the graft and bone tunnel location, graft signal intensity, and graft ligamentization.