Broken crowns

platypus

Hi, I fell and broke two crowns on my front teeth. Just the crowns are damaged, none of the tooth is exposed. I don't have the pieces that broke off. The bottom part of the post is exposed in both teeth.

I have an appointment with dentist for Monday , just wondering does anyone have any advice for anything I should be doing between now and then. I'm not in pain, just want to avoid further damage, also if anyone had any ideas how to make them look better that would be great also

What is a dentist likely to do, repair or replace, they are about 15 years old if that makes any difference