Avascular necrosis or osteonecrosis is the death of a segment of bone due to loss of blood supply. Both bone cells are the bone marrow are affected. AVN is a common cause of hip pain in young and middle aged patients between 35-50 years of age. It occurs more in males. AVN leads to severe degenerative arthritis of the hip joint and accounts for 10% of total hip replacement cases in the United States.… Read the Rest
Bone requires a constant blood supply to remain healthy; without it, bone begins to die and collapse. This is called avascular necrosis, literally bone death due to lack of blood vessels. In the hip, the head of the femur (the acetabulum, or “ball”) is primarily affected. If not treated, the joint surface breaks down, leading to arthritis, pain and disability.
The most common reason why the femoral blood supply is compromised is a hip fracture that tears the vessels supplying blood to the head of the femur. Another cause is taking steroid medications, such as prednisone and other immunosuppressant drugs. … Read the Rest
Total hip replacement in younger patients Authors: Wolfgang Schneider; Karl KnahrSource: Acta Orthopaedica Scandinavica, Volume 75, Number 2, April 2004 , pp. 142-146(5)Publisher: Taylor and Francis LtdAbstract:
Background A high risk of loosening has been reported in replacements performed because of avascular necrosis.
Patients and methods To study cementless total hip replacement (THR) in younger patients with avascular necrosis (AVN), we analyzed retrospectively the outcome in 129 cases: 46 Mittelmeier monobloc ceramic hips (22 cases with AVN), and 83 Zweymüller total hip systems (35 cases with AVN) clinically and radiographically…
…Interpretation We could not confirm that … Read the Rest
AVN (Avascular Necrosis) or ON (Osteonecrosis. What is AVN, what causes it and how to repair AVN damage.
AVN is a hip joint problem where the blood supply to the femoral head (ball portion) of the joint is reduced or obliterated. This causes this portion of the bone to die, which leads to the collapse of the effected bone and femoral head surface. There are many causes of AVN such as use of corticosteroids, over consumption of alcohol, fat disorders, nitrogen (divers !) … Read the Rest
Treatment of Osteonecrosis of the Femoral Head by Core Decompression, Bone Grafting,
Link http://www.uphs.upenn.edu/ortho/oj/1997/oj10sp97p24.html M. E. Steinberg, M.D., P. Larcom, M.D., B. Strafford, M.D., W. B. Hosick, M.D., A. Corces, M.D., R. E. Bands, M.D., K. Hartman
Abstract: Core decompression is one of the more popular procedures for the treatment of early stages of avascular necrosis (AVN) of the femoral head. However, the controversy regarding its safety and effectiveness continues. In an attempt to clarify the situation, we are reporting on a large series of cases performed by a single surgeon with long-term follow-up. This is a prospective study in … Read the Rest