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A member asked:
What do these black lines in the grooves of my molars signify?
A doctor has provided 1 answer
Stain / decay: Most likely it is stain in the deep anatomical grooves. Best to have an exam to be sure. If not kept clean, they can lead to decay. Sometimes they begin to demineralize, get stained, and with proper homecare and fluoride, remineralize. Get them checked.
Answered 3/18/2019
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