As opposed to standard prostheses, this procedure includes the removal of diseased surfaces only; the femoral head and femoral neck are preserved. The femoral head is crowned with a metal cap, which consists of a special cobalt-chrome-molybdenum alloy with high carbon content, similar to the thin-walled acetabular cup.
Beside the advantages of bone preservation and tissue protection, this implant is very suitable for young and young at heart patients, who actively participate in life, but are impaired in their private and/or professional activities, due to their hip joint disease. The pain is particularly essential here, as well as the restriction of movement. However, stable bone conditions, especially in the head and neck area of the femur, are indispensable for performing the resurfacing.
In most cases, a quicker recovery is possible, if compared to standard procedures. Experience shows that it is easier to return to private and professional activities, including sport. The abrasion resistance resulting from lubricated friction and the very low risk of dislocation mean for the patients that they can go in for such types of sports, where conventional prostheses cannot be recommended. This also holds true for professions, which practice with a standard prosthesis is impossible or risky.
The general statements, however, cannot be made: it is recommended that you have a detailed medical consultation, in order to clarify for you individually, if tennis, skiing, Judo or professional dancing are really possible for you after the surgical intervention.
The idea of BHR prosthesis, to cover the surface of the femoral head only, is not new: the implementation trials started in the 1970s and 1980s, but could not establish itself due to the lack of money. So the medical research focused predominantly on further development of standard procedures and improvement of implant materials.
Derek McMinn, surgeon in Birmingham / Great Britain, finally rediscovered succesful material of the past in 1989 and took up again the idea of resurfacing. In studies the load-bearing capacity of the implant has been examined in detail and in 1997 it was introduced as the first modern hip resurfacing implant.
For over 20 years and with more than 100.000 patients, the original implants after McMinn (Birmingham hip resurfacing) have achieved excellent results that have been confirmed through numerous scientific publications. Meanwhile, other prostheses developer and manufacturer have also discovered hip resurfacing and offer the corresponding implants in different composition of matter and designs. Meanwhile many of the new developments are already withdrawn from the market because of bad results. It is necessary as with any new implant to test in clinical studies how durable and functional these implant models are. Helpful are the registries. They show best results with the BHR (Birmingham hip resurfacing), ADEPT and ICON implants. Actually hip resurfacing was developed to buy some years for younger patients before they have to get total hips. Today resurfacing is competing in durability with all other implants. In some cases we even saw outstanding results and advantages compared to the outcome of total hips.
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