Journal of Dental Research, Vol 55, 1067-1075, Copyright © 1976 by International & American Associations for Dental Research Online Journals
Surface properties of hydroxyapatite: I. The effect of various inorganic ions on the electrophoretic behavior
S. K. Doss
The zeta potential of hydroxyapatite (HA) at a constant pH depends on the
type of acid used. Fluoride ions increase the charge density and make the
surface less prone to attack by acid or alkali. Sn2+ and Th4+ ionic
complexes with fluoride ions and increase the uptake of fluoride by HA.