Mechanical stability of fixation of anterior crucial ligament implants

Anterior crucial ligament tears are the most widespread lesions among isolated trauma of knee ligaments that require early surgical treatment especially in young active patients. There are various anterior crucial ligament reconstruction techniques where femur and tibia tunnels are formed and graft is fixed by cannulated interference screws. Especial interest presents operations when synthetic prosthesis made of polyethyltetraftalate are used as implants. Purpose of the study was to test the rigidity of fixation of the anterior crucial ligament implants with various types of fixation by interference screws. Experimental models “bone - implant” had shown that artificial ligaments provide enough stability of the knee joint, that allow early rehabilitation. The most stable system was when the implant fixed by four interference screws. When the implant was fixed by two interference screws it can slide in tibial channel. That may cause the possibility of knee instability during early rehabilitation.