The meaning of this dream depends on your own experiences with teachers or teaching and, of course, the circumstances in your dream. The dream could be addressing your issues with authority and approval. Also, you may have a need for guidance and new learning. Most dreams about teeth leave people feeling uneasy and anxious. Consider the overall content and context of the dream and note if you are having dental problems before making interpretation.
Animals use their teeth for defense and nourishment and show their teeth when angry.
Humans often display similar behaviors. Old dream interpretations say that dreaming about teeth is a bad omen that suggest financial difficulties. In our dreams the telephone could be a symbol with which we are expressing a desire to communicate with ourselves and with others. Theater Theaters may be a metaphor for our physical lives. To paraphrase Shakespeare, life is a stage and we are merely trying to make the best of it.