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1 Indiana University School of Dentistry, Indianapolis, Indiana
The hardness and solubility on identical areas of ground surfaces of enamel on a large number of teeth were measured.
The enamel varied widely in hardness and solubility from tooth to tooth as well as from area to area on the same tooth. No correlation between hardness and solubility was detected.
The Ca/P ratio of the enamel dissolved out during the solubility tests was slightly higher than the 2:1 known to exist in enamel.
Submitted on July 20, 1951
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