Hi Motors Mommy,

When a cap becomes loose and can be taken off easily or it falls off.....

Buy some fixadent or poligrip at the drug store.
Place a very small amount inside the cap and press it back onto the tooth. This is a temporary hold until you can see a dentist asap.

If your tooth has broken off inside the cap, then there will be no room to put the adhesive. Chances are the tooth is not alive and will not cause a toothache. BUT it is imperative to get to a dentist asap to determine what to do with that tooth.

Hope this helps!

Bryanna