It is a surgery to reconstruct the cruciate ligament that is in the center of the knee. The anterior cruciate ligament (ACL) connects the shin bone (tibia) to the thigh bone (femur). A tear in this ligament causes the knee to lose stability during physical activity that involves jumping or twisting, or during sidestep or crossover movements. Request your appointment with Dr. Cristina Ramos in Cúcuta.