I had root canal done over 1yr. Stupidly I did not have a crown put. Last week my tooth cracked in half-kinda hanging. Today, hanging/loose half broke off & fell out. This tooth is already dead bc root canal so- no pain but taste in mouth is bad- tooth is rotting. My dentist wont be in for 2 weeks. I have an appt to extract the tooth when he gets back. What should I do about my mollar in the meantime ? Am I at risk of anything having this situation/rotting tooth that is now 'open'in my mouth ?