Yeesh, fuck that.
I'm 27, I started getting wisdom teeth at like 17, never had any problems with them though. This is my 4th and final one to come through, came through about 5 years ago maybe? And it only partially erupted, i.e. only half of it came up. The back half of it still has gum over it, which is the type of 'impacted-ness' mine has. It's not the kind where it's coming through at an angle, it's just the kind where it has gum still over it, which has now all swollen and become infected from being bitten by the tooth above it.
Cunt.