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Journal of Dental Research
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The Effect of Topical Fluoride Applications on the Surface Free Energy of Human Enamel- An in vitro Study

H.P. De Jong

Dental School, State University of Groningen, Ant. Deusinglaan 1, 9713 AV Groningen, The Netherlands

A.W.J. Van Pelt

Dental School, State University of Groningen, Ant. Deusinglaan 1, 9713 AV Groningen, The Netherlands

H.J. Busscher

Dental School, State University of Groningen, Ant. Deusinglaan 1, 9713 AV Groningen, The Netherlands

J. Arends

Dental School, State University of Groningen, Ant. Deusinglaan 1, 9713 AV Groningen, The Netherlands

The surface free energy {gamma} s and its polar and dispersion components {gamma}sp and {gamma}sd were determined from contact angle measurements on human enamel treated with sodium fluoride, acidulated phosphate fluoride (APF), and aminfluoride solutions. Sodium fluoride solutions only slightly influenced the surface free energy component {gamma}sp. The {gamma}sp value of the APF-treated human enamel increased from 52 to 66 erg.cm-2. The {gamma}sp value after aminfluoride treatment decreased from 52 to 19 erg.cm-2. The {gamma}sd values remained about 35 erg.cm-2 for all specimens measured. It is suggested that aminfluoride-treated enamel surfaces may exhibit a reduced tendency for bacterial adhesion.

Journal of Dental Research, Vol. 63, No. 5, 635-641 (1984)
DOI: 10.1177/00220345840630050501
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