This disturbing photo probably makes you wonder whether this is possible: a palate full of teeth. Although I don’t know if the photo is real or photoshopped, it seems that extra teeth, or supernumerary teeth, can pretty much occur anywhere in your head. In most cases, supernumerary teeth grow out of the upper jaw, between the upper two front teeth or behind the wisdom teeth. However, examples of extra teeth have also been reported in other places, including the gums, soft palate, nasal cavity, and between the orbit and the brain.
Source: Oral Answers