How long does it take for wisdom teeth to fully grow?Watch
I've just realised I remember mine poking through when I was 17 and I'm now 21 and they've still not fully come through. My right hand side ones are about to touch together and the left hand side are just sitting doing nothing.
Teeth take 9 years to fully grow in your jaw btw
In America if your wisdoms don't erupt by 21 they take them out, whether they're causing problems or not! The risk of permanent numbness is less than 1%, although 10% experience temporary numbness.
All 4 of mine started erupting about 4 or 5 years ago, the top 2 have almost entirely come through but the bottom two seem to have stopped at the stage where the gums have split open and I can partially see the crowns of them which is kind of annoying due to keeping the areas clean. I had quite a bit of paint which would last a couple of days every few months, occasional swelling around the TM Joint and the odd infection - i'd recommend a chlorhexidine based mouthwash like corsodyl to help prevent or clear up any infections caused by wisdom teeth, works a treat.