A week ago , it actually cracked in half. It involved the upper molars, is this something we should consider a fault of the dentist, which we have been patients of his for years, and something the dentist has overlooked ? The brigde has been in place for over a year. Dental cleanings are done every 3 months, so if receding gum lines where at fault, wouldn't that have been noticed ? The question is do we comment to the doctor that this is something he needs to replace with no monies invovled ? And what could cause something like this.