The ACL or anterior cruciate ligament is the most important ligament in
the knee. When it is completely torn, it can lead to instability or
buckling of the knee. There are several options to choose from when
selecting a graft for ACL reconstruction such as using autografts
including patellar tendon, hamstring tendon, and quadriceps tendon, and
allografts (also known as donor tissue or cadaver tissue). Artificial
ligaments are also discussed since they are still used in Europe and
Asia. This book summarizes the pros and cons of each graft option in
detail.