What do you do when you break part of a tooth off on a holiday weekend and can't see a dentist?
If painful then
Go to the emergency room. However, if the broken tooth is not hurting then just be careful chewing in the area as it may break further. After eating make sure to clean the area well, if there isnt any discomfort doing so, as to prevent any food impaction.
Hope you wont be in such a situation!