Christina Newcombe was working with primary pupils at St Margaret's School for Girls in Aberdeen when the incidents took place earlier this year.
A General Teaching Council spokesman said Newcombe "extracted the tooth of a junior pupil" in March. He added: "Although this was done with the consent of the pupil concerned, this was in breach of the school's child protection policy."
In June, Newcombe called two pupils a "nincompoop" and a "numpty", during a school trip.
Newcome admitted the incidents and was banned from re-applying to the register for two years.