I'm having a bit of an issue at the moment. I've been running with a permanent crown for 7 days, uncemented.
We agreed with the dentist to leave it uncemented for 2-3 days, to see how I feel. I'm so glad I did, because the crown gave me huge headaches and earaches
Since I already paid for the stupid crown, I can't go to get one done to my old dentist in a different city (I never had problems when he did my crowns). My old dentist took the print for the crown digitally and made it on the same day, and it was always a perfect fit. My current dentist did the traditional "paste in your mouth" to take the print for the crown, and it's just not as good of a fit.
In any case, I'm probably going to have this new dentist shorten the crown a bit more, in case my problem comes from the crown and the tooth above it touching too much. And then I'm gonna have him do a temporary cement of the crown. If the crown continues to cause pressure in my head, in the end, I'm gonna throw it away and go get a new crown made where they do it digitally.
So yeah, temporary cementation is good for some cases in my opinion