1: Injury to major Nerve or Artery.
2: Fracture of the bones may occur which can also damage Nerve or Artery.
3: Tear of the Quadriceps or Patellar tendon.
4: Damage to the ligaments around knee joints.
5: Removal of some ligaments during surgery.
6: Pain, swelling & infection in the joint.
7: Blood collection in the knee joint.
8: Stiffness and reduction of the angle of movement.
9: Phlebitis, blood collection in veins.
10: Reflex sympathetic Dystrophy.