Introduction. Prognostic indices of orthopaedic implications development were investigated among patients with anterior cruciate ligament (ACL) injuries on the basis of stabilography research during the functional period of rehabilitation. Methods. The study included 52 randomly selected individuals with a complete ACL tear qualified for surgical reconstruction. The patients' age was 18-59 (average: 37.8 ± 2.0) years. All participants underwent rehabilitation treatment in the institute of Traumatology and orthopaedics, National Academy of Medical Sciences of Ukraine, and had surgeries in the institute's clinics. The crural part of the graft was fixed with the assistance of either the RigidFix system or the Cross-Pin system, and the Biointrafix or Biosure Sync system was applied for the tibial part. Results and conclusions. on the basis of the performed analysis of indices that characterize the functional condition of the injured limb of patients with an injury of ACL of knee joint at the functional stage of rehabilitation treatment, it is possible to identify a high and medium level of loading asymmetry in the lower extremities, decrease of electrobiological activity and muscle resistance ability during bending, stretching, adduction, and abduction, as the main prognostic criterion of orthopaedic complications development.