I don't know which one applies specifically to me...
Pulling Teeth:
This type of dream can be interpreted differently depending the context of the events that surround it. The key word here in the dream is “pulled”, so that might be an indication that something needs to come out. Teeth are in the mouth so its possible that it could be related to speaking. It could also be related to pulling yourself too hard in some situation or event in your life. If somebody else is pulling at your teeth it could suggest they want to get something out of you. Some have experience teeth dreams if they fear the dentist and have a tooth ache.
Losing Your Teeth:
Losing your teeth could be an indication that your stress and anxiety levels could be to high in your life right now and needs to be fixed. These types of dreams can be somewhat tricky to translate because you might have to face aspect of yourself you could be ignoring.
*Attachment Issues (trying to hold on to something)
*Fear of letting go to something that was part of your life for a long time.
*Afraid of failing
*You dread the feeling of embarrassment
*You may feel a lack of control in your relationship
* Is it possible you set your goals to high and they are crashing down
*What are you afraid to loose
*Are you trying to cover up something
*Afraid of losing your money or the feeling of being abandoned.
But then again different websites have different interpretations of dreams. Of course each 'specialist' will claim to have in-depth knowledge...
From: http://www.dreammoods.com/dreamdictionary/t.htm
Teeth
To dream that you have rotting or decaying teeth implies that you may have said something that you shouldn't have. You may have uttered some false or foul words and those words are coming back to haunt you.
To dream that your teeth is sparkling or gleaming signifies happiness and fulfilled wishes.
To dream that you are brushing your teeth refers to your level of confidence, your struggles and your aggressiveness. You need to look out for yourself and your own interest. Perhaps, you feel that your position is shaky.
To dream that your teeth has fallen out and you try to refit them back into the mouth signifies a lack of self-confidence and embarrassment. You are afraid that others will know of your short-comings. If you acted calmly in your dream, then it may point to how can make the best out of any situation. You are able to rise above unfavorable circumstances.
Dreaming that there are teeth growing all over inside your mouth from the roof of your mouth to under your tongue means that you are on the defensive about something and may be a little overly aggressive about it.
If you dream that your teeth is broken or that it has been knocked out, then it means that you have misspoken about some matter. It is also refers to the consequences of your words and/or what you say about others.
Make of that what you will.
I also have an upcoming dentist appointment soon and was thinking about it either yesterday or the day before. I don't particularly like going to the dentist so that may have something to do with my dream.