17/09/2026
Can you get a cavity under a crown? π¦·
Yes, you can.
A crown protects the tooth, but the natural tooth underneath and around the crown margin can still develop decay.
One reason is gum recession. When the gum recedes, the root surface can become exposed. Root surfaces are more vulnerable to decay, especially when plaque builds up around the crown margin.
Other factors can include:
β’ Poor oral hygiene
β’ Plaque accumulation around the crown
β’ Gum disease
β’ Difficult-to-clean crown margins
β’ Natural changes in the gums over time
So if you have a crown and notice gum recession, sensitivity, food trapping, bleeding, or a dark area around the margin, don't ignore it.
The crown may look fine β but the tooth underneath still needs to be checked. π
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π¦· Your teeth deserve care beyond what you can see.