Aim: The aim of this work is a radiological assessment of accuracy of the osseous channels location in initial reconstructions of the anterior crutiate ligament (PZV) conducted using a navigation systém. Methodology: Following arthroscopic preparation of the joint space and registration of the essential data, conducting wires for channels in tibia and femur are navigated using the navigation system. The lig. patellae graft is then pulled-through and fixed using interference screws. The channels location was assessed using radiological methods according to Bernard-Hertel and Harner. Results: A correct emergence of the femoral channel was found in 13 (87%) and of the tibial channel in 14 (93%) cases. The optimum graft location with respect to the both osseous channels was detected in 12 knee joints (80%). Conclusions: Exact location of the osseous channels is a principal prerequisite for a good result of the anterior crutiate ligament reconstruction. In case of standard procedures, this may be possible only in case the operating surgeon conducts a large number of reconstructions every year. In daily practice, however, 70% of reconstructions are conducted by less experienced orthopaedic surgeons. Our initial results indicate that the navigation system could become an effective tool for the surgeons who do not háve the opportunity for conducting the above procedures too often.

        Key words: anterior cruciate ligament - computer navigation systém - reconstruction of the anterior cruciate ligament