Osteonecrosis is defined as bone death due to inadequate vascular supply. It is sometimes
also called “avascular necrosis” and “aseptic necrosis” when involving epiphysis, or “bone
infarct” when involving metadiaphysis. Common sites include femoral head, humeral head,
tibial metadiaphysis, femoral metadiaphysis, scaphoid, lunate, and talus. Osteonecrosis is
thought to be a common condition most commonly affecting adults in third to fifth decades of
life. Risk factors for osteonecrosis are numerous and include trauma, corticosteroid therapy …