Avascular Necrosis

Question 1

What is avascular necrosis?

Answer 1

Is a condition in which there is loss of blood supply to the bone.
Bone is living tissue, hence loss of blood supply, means bone death.
If bone death progresses leads to bone collapse.

Question 2

What are the symptoms of avascular necrosis?

Answer 2

Stiffness in the hip
Night pain
Limp
Pain in the groin, buttocks, front of thigh

Question 3

How does a fracture over the femoral head cause avascular necrosis?

Answer 3

The femoral head receives its blood supply through the neck of the femur.
Fractures across this zone may cause a loss of this supply leading to tissue death.