Definition: Anterior fixation refers to a medical procedure where a screw or other instrument is inserted into a muscle or tendon to stabilize it against a bone, typically the hip or knee joint. This involves either the insertion of a ligament between the muscles or tendon and the securing of that ligament with screws, plates, or other devices. This technique is crucial in stabilizing joints during sports activities, especially for athletes who have experienced traumatic injuries to their knees.