Yes you are right. It is the dentin.
Enamel has got no nerves.
So when the dentist use his/her instrument, initially there is no pain (if the enamel is intact).
The next layer is dentin. As you said, dentin has got dentinal tubules containing dentinal fluid.
Whenever there is any stimulus which has not yet reached the pulp, but may have reached the dentin, ...
Its definitely not a marine mammal, just based on size and general configuration.
those convoluted ever growing teeth are pretty diagnostic of non-cetacean ungulates.
Just based on the pattern I would say bovidae, but that does not narrow it down much in turkey, the H shaped central portion is fairly diagnostic of bovidae. However you have several antelope ...
Morphogenesis doesn't work in either of the ways that you propose.
To understand better, let's shift the focus from teeth to something that's easier for me to explain and visualize: extra fingers, also known as polydactyly. This is a surprisingly common condition, appearing in approximately 1 of every 500 births, and for many people the extra digits are ...