Survivorship Rates for Hip Resurfacing from National Registries
Australian Orthopedic Association National Registry 2011
The cumulative percent revision at ten years for primary total resurfacing hip replacement undertaken for osteoarthritis is 7.5%
There are six prostheses with over 1,000 observed component years, the ASR, Adept, BHR, Cormet, Durom and Mitch TRH. At seven years, the BHR has the lowest cumulative percent revision (5.0%) compared to Cormet (11.1%), Durom (9.6%) and ASR (13.0%). The BHR is the only resurfacing prosthesis with a cumulative percent revision at ten years (6.3%).
Info from the hip resurfacing meetings attended by Patricia Walter in 2011 below:
McMinn/Treacy series at 10 years –BHR survivorship is 99.74%
Mr McMinn’s results with the BHR show a 97% survival in men and women of all ages at 14.5 years as reported by McMinn’s website
The Oswestry Registry
The Oswestry Registry reports at 5-8 years for 58 surgeons in 8 countries (not including McMinn/Treacy) for 679 hips is 95.7% at 8 years.
The Swedish Registry
The Swedish Registry 2008 reports at 7 years BHR survivorship all ages is over 98.8%
Canadian Joint Registry
Canadian Joint Registry shows the incidence of hip resurfacing in Canada to be 3.5% of all captured hip replacement operations in 2010. This compares to 7.6% for the Australian Registry and 7% for the National Joint Registry in the UK. Data on 2790 hip resurfacings from the Canadian Hip Resurfacing workgroup from 2002 to 2008 showed an overall 5 year survivorship of 96%. For men under the age of 65 with a diagnosis of osteoarthritis the five year survivorship was 97.5%. the five year survivorship for women was 93.7%. The incidence of pseudotumors was 0.09% (3/3400)