Does a Veneer Need to Be Removed to Fill a Cavity?

There is a possibility of repairing the the decay with a composite filling.  Is the decay on a margin? Is the decay in an aesthetic area?  Is the area of decay large or small?  Your cosmetic dentist will take all of these questions into consideration when assessing your situation, then make a recommendation based on his findings.  Good luck.

If the dentist can remove all the decay without removing the veneer, then it can be done. Only he can decide after getting in there.  If he can't get it out then the veneer would have to be redone.  You do not want decay left under the veneer

If the dentist can remove all the decay without removing the veneer, then it can be done. Only he can decide after getting in there.

If caries is developing on another tooth surface than covered by veneer then it can be treated without removal of veneer. If caries is affecting tooth structure under the veneer then only your dentist can tell you after exam if he can repair it without removal of veneer or not.

I am assuming the veneers are porcelain and not composite.  A composite veneer could maybe be repaired.  A porcelain veneer with decay should ideally be replaced.  

The repair would be made with composite and the composite will not stick to the porcelain very well therefore you would need a whole new veneer.  Good luck!