its basically replacement synovial fluid to provide better lubrication. It works okay for some people, other people dont see any benefits. If I remember correctly, its 1 injection a week for 3-4 weeks and each injection is about 400 bucks (covered by some insurances).
Footdoc should be able to tell you more about it. It should be right up his alley.
I dont know wtf aflutop is tho.