Anyone had knee arthritis fixed?

[giddygallopgirl]

Has anyone had knee arthritis and had any form of surgery or treatment that has fixed it or massively improved it?

I've been advised a knee replacement is not advisable as I am in my 40s and otherwise fit and active.
(Apart from only being able to walk for 5min at a time)

I had a bi-lateral arthroscopy done about 16 years ago. I was told it "should help". The surgeon messed up resulting in one of my knees being much much worse than it was. I wish I'd just left it alone. At some point I will need knee replacements. I'm mid 50s