In many cases, complex knee reconstruction is the only way to heal a knee injury where more than one ligament is injured. Using arthroscopy, a minimally invasive procedure, doctors make small incisions around the knee and insert a tiny camera to guide them through surgery. Some ligaments can undergo direct repair (i.e. medial collateral and lateral collateral ligaments); other ligaments (i.e. anterior and posterior cruciate ligaments) will be reconstructed from healthy tendon or donor grafts via an arthroscopic approach.