What is the cause of a grown wosdom tooth that os roating?

See your dentist!: I'm not sure i understand exactly what you are describing, but i think you're asking about wisdom teeth. Because there are so many variations for these, it is best to ask your dentist to answer your questions after an exam and x-rays--this is really the only way the answer will be meaningful for you.

Wisdom Tooth: If you are referring to a wisdom tooth that has erupted into your mouth and is "rotting" or decayed it is something you need to the dentist about sooner than later. The decay may be able to be restored with a filling or the tooth may need more extensive work, possibly extraction. You need to see the dentist to determine the appropriate treatment.