A 44-year-old member asked:
i am curious if cuts and bruises heals itself, why tooth cavity doesn't?
2 doctor answers
Dr. Theodore Davantzis answered
40 years experience Dentistry
Very simple: Your skin is living tissue.. It has cells that can divide and repair damage, like a cut. The enamel and dentin of your tooth is not alive... There are no cells to divide and repair the damage. Only the nerve in the center of the tooth is alive, and if it is traumatized too much, it dies. Your enamel is comprised of an inorganic matrix of calcium and other materials.
Answered on Dec 9, 2013
Dr. John Rohm answered
33 years experience Cosmetic Dentistry
Blood Supply: Cuts are healed by new cells growing over a wound . Once a tooth is formed it does not change on the outside of the tooth. A cavity is the erosion of a part of a tooth, that has no blood supply or the tooth cells to grow new parts of the tooth. So once a cavity has reach a certain size it can not be reversed, it must be removed. Then a filling can replace the destroyed parts.
Answered on May 19, 2016
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