Aseptic Necrosis (otherwise known as Avascular Necrosis or Osteonecrosis) is a condition that causes bone death due to the lack of blood supply on that area of the bone. This condition can cause a tiny break on the bone, weakening it and affecting its normal functions. Eventually, the bone may collapse.
Common causes of aseptic necrosis include traumas or accidents that result in a broken bone or joint dislocation. Other causes include damage to blood vessels, inflammation of the blood vessel walls, hypercoagulation, and poor blood flow on the bone.
Furthermore, alcohol abuse and steroid use are also common risk factors.