Something else that I learned. My hip was very painful for a year. In that time, I had my second CMC joint replacement (think thumb), carpal runnel surgery, a bilateral knee revision and bilateral knee manipulation. Xrays on hip continued to show minimal thinning of cartilage. I found an open MRI facility (I am claustrophobic) and it showed moderate thinning..and with the pain and symptoms, the OS felt that the replacement was indicated. A shock to us all..stage 4 arthritis..so a lesson that I learned...X-rays and MRIs do not always show it all..and I think, at least in the US, that it will be more and more difficult to have joint replacements without Better "proof". Nothing to do with politics or Obamacare. Just the way insurance companies are controlling costs.