Can wisdom teeth grow back? i had a wisdom tooth removed 3 years ago. now there is a tooth growing in that exact spot.

Once : Once removed completely a tooth does not grow back. If there was incomplete removal, such as a retained root tip, then that piece can "supraerupt" into your mouth. There could also have been an extra (supranumerary) tooth in the same area that could now be erupting into your mouth. Finally, there could be some type of lesion growing in the area. You need to see your dentist for an exam and radiograph of the area.

The : The best advice is to see a dentist asap. If a tooth is removed, it will not grow back. So if something is there, it is either a supernumerary tooth (an additional tooth beyond the normal 32 we get), a remnant from the original tooth (broken root), a piece of bone that is being exfoliated or an instrument that was left behind (ever hear of tools being left in the stomach during surgery?). Ok, that last part is highly unlikely.... An xray would certainly help determine what is going on.

Adult : Adult dentition once completely removed will never grow back, as previously stated by drs. Funari and timmerman a residual root tip may have inadvertently been left inside at the time o the extraction, and you may be experiencing is the surfacing effect of the remnant tooth structure. I would like you to consult a maxilofacial surgeon allow him to take an x-ray of the area in order to determine your condition.