Research On Application Of Computer Assisted Navigation System In Anterior Cruciate Ligament Reconstruction

Objective To investigate the computer navigation assisted system in the reconstruction of anterior cruciate ligament in the knee positioning the tunnel of tibia and femur, To evaluate the value of computer navigation system in the reconstruction of anterior cruciate ligament.Methods Computer assisted navigation system was used for 50 cases of adult specimens of tibial to position anterior cruciate tibial tunnels. The tibial tunnels of the specimens was observed and measured. There were 30 femoral tunnels located by Amis law and 30 femoral tunnels located by cross-positioning law. The export position of femoral tunnels were measured and compared.Results The virtual tunnels and the actual tunnels had difference about 1.61±1.27°in perspective. 50 cases of the export position of tibial tunnels were located in the area between medial tibial condyle spine and lateral tibial condyle spine, 50 cases of the export position of tibial tunnels were located in the area outside the intercondylar collision area and the PCL collision area. Tibial tunnels were the location of the average 45.87±4.16%. The femoral tunnels which were posited by Amis law had no difference with those posited by femoral shaft axis line and Bluemensatt line cross-positioning law.Conclusions Computer-aided navigation technology can accurately position tibial tunnel, the tunnel's length and angle can be predicted by navigation virtual probe. Cross-positioning law is a viable method of positioning.