Is there any assumed guarantee on dental crowns?

Answered February 09, 2012 08:14. There are no guarantees expressed or implied with any medical procedure, and it is unethical for any health care provider to do so. You do not say how old the crown is, but it is possible that something is breaking down under the crown. It could also be that nothing broke off, but in fact, you have a bone loss in that area resulting in a space and a bacterial/food trap. Was a recent radiograph taken? What did your current dentist tell you? This cannot be left untreated. From your description, and assuming you are correct that something did break off, it could be that a small piece of porcelain chipped off the crown. If the gold coping under the porcelain flexed due to a cavity in that spot, the porcelain could flake off. If there is a cavity, it needs to be taken care of. Even if no cavity, the food and bacteria being trapped will constantly keep the gum tissue in that area inflammed, which can lead to a periodontal defect. You should see your new dentist to determine what exactly the problem is and what would be the proper course of action.