My Temporary Crown on the Back Tooth Came Off- Do I Need To Cement Temporarily Until Dentist Visit?

Hi:It’s always best to have the temporary tooth recemented to avoid any tooth movement that may interfere with cemenatation of the final crown.Best,Dr. Maddahi

Visit the nearest dentist in a day or two to get the temporary crown fixed with a temporary cement. I will not suggest Self cementation using over the counter dental cements. Delaying too much will cause migration of adjacent teeth and supra eruption of opposing teeth and the impression measurements will not match with the teeth position in the mouth. Thereby outcome of the treatment will not be good.
During the day time , if it permits , you can place the crown on the tooth yourself without cement and remove it during consumption of food. Also remove during sleep. This will prevent movement of adjacent teeth to a great extent till you see a dentist in 2 days time.

It is preferable if you can place the temporary back in your mouth. go to the pharmacy and get temporary cement, clean temporary and only place small amount in temporary crown. Do not place too much because then excess cement can irritate your tissue. BE careful of sticky foods or snacks.
If left temporary out for two days and not to painful, you probably could leave off with little chance of any teeth shifting.
Make sure contact your dentist on Monday.