Oh no, that's much more serious. Let's continue:
The dentist took an X-ray and discovered that the cavity had progressed to the point of infection. "Susan, it looks like we need to do a root canal to clear out the infection and save your tooth," the dentist explained.
Susan felt a wave of panic. She had heard horror stories about root canals, and the thought of undergoing one made her stomach churn.
The dentist assured her that the procedure was routine and would be performed under anesthesia, so she wouldn't feel any pain. Reluctantly, Susan agreed to the root canal.
