Birmingham Hip Resurfacing
The Birmingham Hip Resurfacing (BHR) is a metal-on-metal prosthesis used in hip resurfacing procedures. Hip Resurfacing is a bone conserving procedure where the acetabulum (hip socket) is replaced and femoral head is resurfaced. Hip resurfacing is indicated in individuals with arthritis where conservative treatment has failed. The advantage of the hip resurfacing procedure is that the femoral head is preserved. Some studies indicate that the loading of the femur is closer to normal with this procedure.
In hip resurfacing, the articular surfaces of the femur and acetabulum are replaced. The procedure is bone conserving as most of the head of the femur is retained. Instead of removing the head completely as with a total hip replacement, it is shaped to accept a low-wear metal sphere. This sphere matches the patient's own anatomy that confers low risk of dislocation, a broad range of movement and excellent stability.
The BHR offers a bone conserving alternative to total hip replacement, with the potential for higher levels of patient activity. The BHR system has allowed many young and active patients, athletes, and sports personalities with arthritic hips to perform their normal activities with no or minimal pain.
Data from the Australian hip registry has indicated better performance of the BHR implant compared to conventional total hip replacement in male patients under the age of 60. Because the femoral head is not replaced, bone quality must be good enough to support the implant.
Recently, concerns have been raised regarding production of metal ions and wear debris with these implants. For this reason they are not recommended in women of child bearing age or patients with renal insufficiency.
The BHR offers a real alternative to patients seeking maximum bone preservation and an active lifestyle. |