title: Effect of fluoride on the morphology of calcium phosphate crystals grown on acid-etched human enamel.
abstract: The aim of this study was to examine the effect of fluoride ion concentration on the morphology of calcium phosphate crystals grown on acid-etched enamel as a model for tooth enamel erosion. Samples were immersed in calcification solution for 16 h and changes in crystal morphology were monitored by field emission scanning electron microscopy. Without fluoride, plate-like octacalcium phosphate crystals (20 nm thick, 2-10 microm wide) were formed. With 1-10 mg/l fluoride, arrays of denser needle-like nanocrystals (20-30 nm wide, >500 nm in length) were formed. We conclude that there is a minimal fluoride concentration (1 mg/l) that dramatically affects the morphology of calcium phosphate crystals grown on etched enamel in vitro.
authors.affiliation: Center for Craniofacial Molecular Biology, University of Southern California, Los Angeles, CA 90033, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Fan
authors.forename: Z
authors.initials: Z
authors.lastname: Sun
authors.forename: J
authors.initials: J
authors.lastname: Moradian-Oldak