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Wednesday, January 24, 2001

Operative Dentistry MCQ Answer 07

Posted by Vishaal at 1/24/2001 09:31:00 AM Wednesday, January 24, 2001
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The answer is C

Each dentinal tubule contains cytoplasmic cell processes (Tomes fibers) of an odontoblast. There is no mention of them being absent as you approach the pulp.

There are 15,000-20,000/mm2 at the DEJ and this INCREASES to 45,000-60,000/mm2 at the pulp. The lumen in the coronal dentin is .5 to .9 um then INCREASES to 2-3 um at the pulp. The tubules have a slight S-curve to them in the crown, but are straighter in the incisal ridges, cusps and root areas.


SOURCE: STURDEVANTS ART AND SCIENCE OF OPERATIVE DENTISTRY 4TH EDITION. page 23.

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