Do cavities work their way in to a tooth or do some come from inside to the outs!


Question:

Do cavities work their way in to a tooth or do some come from inside to the outside of a tooth?

Would a 4 millimeter hole in a tooth have started from the inside of the tooth or the outside? Curious, because some say, for instance, that lightning comes from the earth to the sky!?


Answers:

That's actually a really good question.
There are two main layers to a tooth in which you can get cavities. Both layers serve to protect the inner living tooth tissue called the pulp, where blood vessels and nerves are. If the inner layer of dentin is compromised for any number of reasons, maily genitics, they can start on the inside, and work their way out. Cavities always have an external beginning, although the internal dental layers tend to decalcify and soften first, it usually seems very intact until in further phases, when by mechanical effects, the external layer breaks and the cavity appears.




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