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J Dent Res 29(3): 270-277, 1950
© 1950 International and American Associations for Dental Research
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THE INFLUENCE OF SOME SURFACE-ACTIVE SUBSTANCES ON DECALCIFICATION OF THE ENAMEL SURFACE

J. P. WALSH M.B., B.S., B.D.SC. (MELB.) L.D.S. (VICT.) F.D.S.R.C.S. (ENG.)1 and R. W. GREEN M.SC.1

1 University of Otago Dental School, Dunedin, New Zealand

1. A number of surface-active and oily materials have been investigated to determine their ability to protect wet tooth surfaces against decalcification by acid saliva.

2. Two experimental methods have been developed and shown to give comparable results.

3. Of the natural and mineral oils studied, measurable protection was observed for only two, namely, oleic acid and solutions of long chain aliphatic amines in paraffin oil.

4. Over a 2-hour period, a single application of cetylamine in paraffin to the wet tooth afforded 70 to 80 per cent protection against saliva at pH 4.0. When the action of the acid was prolonged to 24 hours, the protection was still of the order of 50 per cent.

5. Some of the conditions governing the action of cetylamine solutions have been examined.

Submitted on September 4, 1949






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