from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The main, calcareous part of a tooth, beneath the enamel and surrounding the pulp chamber and root canals.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The hard, dense calcareous material that makes up the bulk of a tooth
from The Century Dictionary and Cyclopedia
- n. The proper substance or tissue of teeth, as ivory, for instance, as distinguised from enamel, cement, or pulp.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. bone (calcified tissue) surrounding the pulp cavity of a tooth
- n. a calcareous material harder and denser than bone that comprises the bulk of a tooth
Sorry, no etymologies found.
Underneath that ceramic-like covering, dentin is like hard clay reinforced by fibers of collagen, similar to the way adobe bricks contain clay reinforced by straw fibers.
Normal dentin is twice as stiff as pinewood, but damaged dentin is more like rubber, which makes it pretty hard to chew with.
Most of the tooth is made up of dentin, which is located directly below the enamel.
As before stated, the first germs of the dentin are the papillæ, corresponding in number to the teeth, formed from the soft mesodermal tissue which bounds the depressions containing the special enamel germs.
The lesion doesn't always lead to a full-blown cavity, which entails decay of the layer right beneath the enamel, called dentin.
Friction brings into close contact numerous particles of two bodies, and perhaps the electrical action going on more or less all the time through gold fillings (especially when other metals are in the mouth) accounts for a powdered condition of the dentin which is sometimes found under cohesive gold fillings, but not under tin.
They're made up of dentin which is what you and I have making up our teeth.
"dentin" tissue beneath it, eventually destroying large parts of the tooth and - when they reach the living pulp at its centre - causing intense pain.
Straw-like dentin tubules transmit pain to the tooth's nerve when exposed to heat or cold, acidic soft drinks or bleach in tooth whiteners.
Tooth sensitivity is caused when the dentin layer below the enamel is exposed.