To that end, the replacement ligament L might comprise: [0008] 1. ligament or tendon or other tissue harvested from the patient's own tissue (known as autograft tissue); or [0009] 2. ligament or tendon or other tissue harvested from another human donor (known as allograft tissue); or [0010] 3. ligament or tendon or other tissue harvested from an animal source (know as xenograft tissue); or [0011]