So the writer could have meant the opposite of that.
But it all depends on context. Not so long ago (less than 100 years ago in the UK) dentistry was so painful that a common 21st birthday present was to be fitted with false teeth. After a day's work, a man might take his teeth out and put them in a box. Then the door-bell might ring, and his wife might say 'Quick - get your teeth out'.
Or maybe it is an idiom in some parts of the world...
Student or Learner