Is it feasible that my gumline decay occurred in less than 5 months or did my hygenist miss the sign

I have a gumline decay under a crown. My last exam was 5 months; wondering if this is common to have decay go from 0 to disaster without the hygenist catching it earlier? Thank you.

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Answer: Decay under a crown

By Sarah h
Dental Professional

Unfortunately, it is hard to detect decay under a crown, unless it extends to the gumline or the crown comes off.  Because crowns are radiopaque in dental radiographs, the decay is masked and cannot be seen.  If it started interproximal (between the teeth), it could have been active for sometime before it was noted on the gumline.  Your dental hygienist is not at fault for decay forming under your crown.  The best thing to do, is to have it restored immediately so it doesn't worsen or become unrestorable. 

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