My knee doctor (I'll need knees in about 10 years) also is a leading hip surgeon. - Stefan Kreuzer
https://inov8surgical.com/
He pioneered the "reverse" hip replacement. They go in the backside and are able to do it with minimal muscle cutting.
He did both of my father's knees. I'm over there tomorrow for my "GEL ONE" lubricant injections. Trying to hold off for a few more years.