Osteonecrosis of the hip is a painful condition that occurs when the blood supply to the bone is disrupted. Because bone cells die without a blood supply, osteonecrosis can ultimately lead to destruction of the hip joint and arthritis.
Osteonecrosis is also called avascular necrosis or aseptic necrosis. AVN hip can lead to Degenerative Arthritis of Hip Joint necessitating Total Hip Replacement Surgery.
Risk Factors :
Although it is not always known what causes the lack of blood supply, there are a number of risk factors that can make it more likely for someone to develop the disease:
- Injury — Hip dislocations, hip fractures, and other injuries can damage the blood vessels and impair circulation to the femoral head
- Corticosteroid medicines
- Osteonecrosis is associated with other diseases, including Caisson disease, sickle cell disease, myeloproliferative disorders, Gaucher’s disease, systemic lupus erythematosus, Crohn’s disease, arterial embolism, thombosis, and vasculitis.
This procedure involves drilling one larger hole or several smaller holes into the femoral head to relieve pressure in the bone and create channels for new blood vessels to nourish the affected areas of the hip. When osteonecrosis of the hip is diagnosed early, core decompression is often successful in preventing collapse of the femoral head and the development of arthritis.
- Core decompression and autologous bone marrow or cancellous bone grafting – same as core decompression in addition autologous (means patient’s own marrow or cancellous bone graft) is used to impact the affected area of hip by special instrumentation.
Total Hip Replacement
If osteonecrosis has advanced to femoral head collapse, the most successful treatment is total hip replacement. This procedure involves replacing the damaged cartilage and bone with artificial implants.
Total hip replacement is successful in relieving pain and restoring function in 90 to 95 percent of patients.