Should I go back to the dentist to have him correct an issue where food gets stuck between two crowns or is this normal?

If food gets caught between two crowns, the solution you seek is probably to replace one of the crowns.  If one or both crowns are new, the dentist should be willing to replace it at no cost to you.  If it has been a few years, then the teeth may have moved, and a partial or whole fee may apply.   

You are supposed to have a contact that helps prevent food impaction. The more you get food stuck between the teeth, it will cause your gums to start getting inflammed and become sensitive. Unless you can clean the area very well it would be best to close off the gap.

Good Luck,

Dr. Daniel Rubinshtein

The gum tissue around the tooth and the contours of the tooth/crown tends to deflect food away and prevents food from lodging there.  This is very beneficial to the long term health of both tooth and gums.  Food impaction, as its called can set up inflammation in the gum tissue possibly resulting in periodontal disease and bone loss.  The presence of food adjacent to the tooth/root surface for a prolonged period can also put the tooth at risk for decay and cavities.  In addition it is very tedious to have to keep cleaning the area out.  Let your dentist know your specific concerns and give him an opportunity to have them addressed.