Teeth are the most integral part of the mouth and the mouth, as much as you might want to deny it, is one of the most integral parts of the body. People think oh, blah to the mouth but when it comes right down to it, if you didn't have a mouth, you wouldn't be able to consume food and if you weren't able to consume food then you'd die of starvation. Therefore crumbling teeth in a dream can mean some pretty traumatic and awful things for you. To find out a little bit more detail about what it might mean though, keep reading below.
A dream in which you have crumbling teeth usually means that you are going through some really bad candy. You need to treat your teeth with more respect or they really will crumble. A dream like this is merely your brain's way of trying to tell you to calm down on all of the candy and sweets and sugars that you've been eating. When you have so much candy and so many sweets you'll end up putting yourself in a bad situation from which there is no coming back. There is no reverse button that you can put on your teeth to make them go back to perfect. It might seem annoying that the dream is so scary to you but in the end your mind is doing you a favor to keep you from having to go through this entire trauma. You need to know that you have to take care of your teeth. Count yourself lucky that you are getting this warning, because not everyone else is as lucky as you are right in this situation.
Dreaming that you have crumbling teeth can also mean that you just generally think that some bad things are about to happen soon in your life. Having all of your teeth fall out is just about the worst thing that a person can imagine, at least as far as a lot of people are concerned. So therefore if you end up having a situation in which your teeth are falling out of your head in your dreams it means you have a lot of stuff to worry about, or that even if you don't have stuff to worry about, you're inventing it for yourself because you don't feel so good about everything that's going on.
Dreaming of crumbling teeth can also be a sign that you need to change your diet. Cut down on all of the sugars and fats and increase the amounts of vegetables you intake. This should fix you right up, make you feel healthier, and you will also end up having fewer nightmares about your teeth being destroyed right out of your head.