The contacts between
restorations like crowns and the natural teeth have to be done very carefully,
as open contacts allow for food packing and promote gum infections. Your
dentist should still be able to make slight adjustments to the tongue side of
the crown to help it feel more natural in...
It may be poor design with large gaps that have been sealed with resin cement. Resin cement can later stain depending on coffee/smoking habits thus leaving a dark brown line. It happens also veneers with poor margins.
Thankfully this is a
quick fix! Your dentist can smooth this rough area for you so that it does not
irritate your tongue. Give them a quick call and let them know…it will only
take a few minutes to complete.