To dream about fangs suggests that you have said something that caused others pain.
In a dream, the teeth symbolize our connection to society. Our smiles are what make first impressions with our friends, coworkers and strangers. To have teeth which are dirty, stained, cracked or broken in a dream represent problems making connections with people. You may be worried that the people you meet do not truly know you, are getting the wrong impression, or can only see you for your flaws.
Your teeth in a dream may also represent your ability to care for yourself. Brushing our teeth is a daily task which shows the respect we have for ourselves and the care that we take in public presentation. A dream in which you brush your teeth indicates that you might need to take control of yourself, your public image or your situation and gain confidence. A dream in which your teeth are falling out symbolizes an inability to care for the small responsibilities you have while you are awake. You might be worried that you cannot handle many tasks which have accumulated at work or at home.
Dreams about teeth also very commonly occur when you are having tooth or mouth pain in reality. You may already have noticed a pain while you are awake, and this pain has continued while you are asleep and had a strong influence over your dreams. If you have not noticed a pain while you are awake, you might be grinding your teeth while you sleep, causing some discomfort. A dream in which you hear loud grinding industrial noises might be a result of this problem.