After your root canal procedure, you can expect the following:
Wait until the anesthetic has completely worn off before you start eating again, otherwise you may bite down too hard and damage your mouth or new crown.
Some mild irritation, swelling, and/or tenderness after a root canal treatment is normal, but it should go away within a few days. The mild discomfort is easy to manage with a cold compress and over-the-counter pain medication.
If your dentist prescribed antibiotics, take them as directed.
Continue to practice proper oral hygiene post-procedure.