Hi Cathy
Welcome to Hip Talk. I will tell you that my exprience of reading posts and information for about 3 years is the newer less experienced doctors are very conservative. They will often opt for a THR instead of a hip resurfacing just to make sure they don't have problems.
Even 100 or 200 resurfs don't make a doctor really experienced in the world of hip resurfacing. If you have a difficult or more advanced hip problem, the more reason you need to get to the really experienced hip resurfacing surgeons. I don't know where you live, but it is often worth traveling to make sure you get what you want.
Here is the most recent Australian study and you can see the revision rate for the BHR was 2.5% The over all revision rate for the BHR since the US jumped in is 4% You can see that at the top of this page
http://www.surfacehippy.info/vmbhrhistoryinfo.phpYou never know where these doctors get there statistics.
My best advice is find a really good experienced surgeon if your femoral neck is narrow. That is one reason I went to Dr. De Smet in Belgium. I was older with a loss of bone density and a cyst - he had done over 2400 hip resurfacings at the time. He is now over 3000. I wanted experienced.
You can get some pretty good exprienced doctors in the US now with Dr Gross in SC over 1300, Amstutz in Ca and a few others. Check out my list.
There is definitely a steep learning curve and the problems usually come in the early experiences of the surgeons. If you have a special problem, go to the most experienced surgeon you can find that you like.
You don't need a bone density test to determine your bone density. Dr. De Smet only uses x-rays, he doesn't use bone desity test. Pretty much the US doctors use them to cover themselves. Our health system is quite different than overseas. Doctors are always conservative here and trying to protect themselves from lawsuits. That is why many won't even do women over 55. De Smet and overseas doctors do much older women. I was 61 when I was done. I know of several that were 67.
Pat