Cavity under 5 months old crown ?

Question

I had a crown and a root canal done five months ago after finding decay under an old crown on #3. Last month I started having pressure in the crown and the crown is very sensitive to percussion, but ok for biting. I’m very used to having crowns and It does not seem normal. Could it be a cavity under the new crown ? I join an x-ray. The x-ray is after the root canal (temporary crown) and before the new crown. Does the x-ray show any decay ? can I know without removing the new crown? Thanks

Brian Stoute, DDS · Answer

It is unlikely that decay under the crown of a root canaled tooth would cause the symptom you described. You should have the root canal result evaluated by an Endodontist to determine if all is well with the root canal procedure. Crack tooth syndrome is also a possibility.

Kourosh Maddahi, DDS · Answer

Hi:It’s difficutl to tell if there is cavity on the X-ray.  It is best if it is evaluated clinically by your dentist.  One of the ways new cavity can form this fast could be due to dry mouth.  Best,Dr. Maddahi

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