Should i get all my teeth crowned?
Q. I had 4 upper front teeth veneers replaced a year ago after 23 very successful years with the original veneers. However, I had chipped one and the others were showing an ugly black line as a result of gum recession. The replacements have been nothing short of disastrous because although they look great, they keep falling off and one cracked before breaking off. My dentist (who fitted the originals and in whom I have complete faith) is baffled. I am due to go back on Monday because another has dropped off (for the third time), this time after only 2 weeks of re-bonding. I have looked at the procedure for veneers on your website and my dentist seems to be following that to the letter. Are there different types of cement for bonding? I would appreciate your comments because the alternative now is to have them all crowned.
A. This is a difficult and frustrating problem for both you and your dentist. I am glad your trust is still intact. The probable cause is flexing of the teeth. When old veneers are removed there is sometimes a need to remove a little more enamel and dentine. The enamel is the best to bond to but also acts as a kind of exoskeleton to the tooth reducing flexing. If the veneer preparations are more into the dentine the teeth can flex and also the dentine bond strength is less than the original bond to enamel. This reduce bond strength and the increasing flex of the tooth can cause th eveneers to pop off. In these situations the veneers often needs to overlap the incisal edge to provide some mechanical lock to the veneer. The other possible cause is your bite but if you had success with previous veneers this is less likely to be the cause. I hope these thoughts help you and your dentist but I cannot be sure without examining your mouth
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