A hole in tooth after a root canal?

Asked by livelaughlove21 (15724) January 24th, 2015 from iPhone

My husband had a toothache last weekend and ended up having to get a root canal in his front tooth, where he already had a crown (which they did not remove in order to do the root canal). They sealed the hole the first day and then brought him back the next day to finish it by putting a post in, according to him. It was finished on Wednesday. On Friday he said it felt different and asked me to look at it. There’s a small hole in the back of the tooth with nothing filling it.

We were planning to call the dentist to see if this is normal on Monday when they open since neither of us has had a root canal and had no clue what’s normal, but a moth ball type of smell is now on his breath even after brushing. I’m assuming that it’s bacteria getting into the hole, which happened when he had a temporary crown that wasn’t placed correctly years ago. The smell went away when he got the permanent crown.

Should the dentist cover the charge of fixing this problem? Is there anything we can do to clear out the debris to get rid of the odor until Monday, because I’m not kissing him with moth ball breath.