My nightmares are always that my teeth suddenly start shattering into a million pieces. Always blamed it on the fact that I stopped wearing my retainer from my teen years and my parents still remind me of it even now in my thirties. Does this mean I'm going to lose all my teeth? ;)
Dreams are an idiolect. It is a symbol for you with a particular meaning. It might help you to read about how the back porch of the house I grew up in took on a particular dream meaning for me: