I had my top Wisdom teeth taken out by the denstist a few years abck, but when it came to the lower ones, the dentist also refferred me to the hospital.
The reason for this, the dentist explained, was that the lower wisdom teeth sit close to the main nerve that connects to all the other lower teeth, and should he get it wrong, the result, in the worst case scenario, would be that all the lower teeth die off and fall out.
Went to the hospital, where I s greeted by two ladies, and thay had them safety sheilds on, that make them look like a bomb disposal unit.
They said it shouldn't take long and that I should be done in about 20 mins.
45 mins later, thay were still digging bits of tooth out of my gums, because the wisdom teeth had fractured and 'exploded', but once they picked all the fragments out I has fine.
On another note, be careful of Greekman, he might check a cavity that's not in your mouth