I had half of my left one changed out. At age 63 I was afraid to do a full replacement due to the 15 to 20 year life expectancy of the knee not being as long as I am likely to be around. After a partial replacement a full replacement is not a problem in 20 years. I did have a little trouble finding a surgeon who can do the partial.

Left hip is acting up the last week or so....its next.

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.