it's hard to tell what will happen down the line, but people go to sunbeds and everyone knows it's not safe, and people get skin cancer all the time by that, yet it's still given approval.
I'm no expert, but for this i can only think early onset of arthritus in the knees, I can't imagine anything else happening other than that.
but all scientific evidence supports that once the bone is healed everything is back to normal and any doctor looking at your knee bones would conclude that you bone is exactly the same as it was 9 months ago, only longer, so i like to think there are no issues.
very unlike the sun bed people, any doctor would say you will get skin cancer, and your going to get it, and i can see it happening, yet people (mostly girls) do it and you thin why there are many attractive women who are very white.
I would say liposuction is pretty bad, but i don't know much about it, id say sun beds and liposuciton are worse than LL, just because something is painful and invasive doens't mean it isn't safer than other things which are more conventional.