What is avascular necrosis?

Avascular necrosis refers to the death of bone tissue due to a lack of blood supply. When blood flow to a bone is restricted or compromised, cells in the bone cannot survive, leading to the death of the bone tissue. This condition is often associated with trauma, certain medical conditions, or long-term use of specific medications (like corticosteroids), which can affect the blood supply to bones.

The term "avascular" literally means "without blood vessels," highlighting the critical role that blood flow plays in maintaining bone health and viability. In the absence of adequate blood circulation, bone tissue begins to degenerate, which can lead to pain, structural instability, and ultimately joint dysfunction.

Recognizing the implications of compromised blood supply is vital in understanding how avascular necrosis develops and the potential consequences for bone health.