question: about 3 weeks ago i broke my front two teeth pretty much in half which has made me need to get root canals and crowns but as my dentist is busy right now i have to wait a while so they put temporary fillings over the exposed nerves to protect it. but 5 days ago the left filling came off and started hurting again due to the exposed nerve being sensitive so i went to the dentist and they put another filling over it, then the exact same thing happened with the other tooth 3 days ago, except this one doesn't hurt and isn't sensitive at all, i assume the nerve is dead? so i haven't felt the need to replace the filling on this tooth and have just left it, Is this ok? or should i really go and get the filling replaced? also the one that has been replaced has started to ache in my tooth my root and the gum and is starting to get quite uncomfortable is this an infection? what shall I do? Thanks, Mark