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Filling in a crown

I have a small pinhole in a gold crown on the top center surface and the dentist has suggested a filling.  Is this ever an acceptable approach?  I have concerns about trapped decay and future leakage around the filling.  The crown is 20 years old but would prefer to salvage it, if possible.
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If there is no decay of tooth structure, periodic exam may suffice.
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745634 tn?1243723447
That would depend on the size of the hole, if there is any decay, and the overall condition of the crown.  Gold crowns do last a long time, I have seen up to 35 years.

Will a filling under a crown leak?  Eventually yes, but it might give you some more time before needing to replace the crown.  Just replacing the crown is a good option as well.
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