My temporary crown cracked off (lower back). i can't get to dentist for a few days, any harm in having it uncovered? it was a root canal tooth.

No if careful: Because you had endodontics, the tooth will not be sensitive. The only harm is if you were to bite down on something hard and cause a fracture. So if you avoid it when eating, you should be fine.

Generally not.: Root canals remove the nerve and blood vessels from a tooth and are replaced by a rubber like material. A tooth without a crown has exposed dentin which if kept clean can be ok for awhile. However, the tooth is more prone to fracture do don't wait too long. Good luck.

Minimal: If it was just the temporary crown, you have a little time to get in. That being said, bacteria can still get into the tooth and place the tooth at a disadvantage long-term. Teeth also may drift in a short time and cause the need for more adjustment on the final crown or a need to remake the final crown. Temporaries are much weaker than final crowns so it doesn't mean you will have more problems.

Probably not, but: Crowns are recommended to help prevent the treated tooth from cracking. Without the temp crown on, your tooth may be more vulnerable than it was before. Be careful and do not chew on it. Because it has has a root canal, you should not have any temperature sensitivity. You might impact food or debris around it, so brush and floss as normal. If there is a temp filling missing, go in right away.

Depends: If the tooth is properly sealed it should be ok. If not, the root canal sealer will be contaminated and you will need to re-do the root canal treatment again in order to remove the bacteria, otherwise you will her an infection sooner or later.

Unprotected tooth: It probably will not hurt since it has had root canal treatment. Just don't chew on it or you can cause a fracture in the tooth since it is not protected.

Keep it clean: Keep it clean and try to get in to your dentist as soon as you can, and they can make you another temp crn.

The tooth may move: Leaving a temporary crown off may let the tooth move, when the dentist puts on the crown it may not fit correctly. Call the dentist to see if they can get you in sooner to place the crown or make a new tempporary.