The term "Avascular
Necrosis" refers to a condition where a portion of a bone dies due
to diminished localized blood flow. This results in
degeneration of the bone, which is particularly problematic near a
joint, as it may cause arthritis. (See photo to the right.)
Avascular necrosis can
result from a trauma of some sort that never heals. For
example, a fractured bone or a surgical bone cut can lead to an
necrosis can result from a low-grade repetitive trauma.
Examples of this are a long-term use of high heeled shoes that
causes a slow, gradual death of a bone through repetitive trauma
called "Freiberg's Disease" (See below).