Korean J Orthod.  2008 Dec;38(6):407-415. 10.4041/kjod.2008.38.6.407.

Changes in surface content and crystal structure after fluoride gel or hydroxyapatite paste application on stripped enamel

  • 1Department of Orthodontics, School of Dentistry, Wonkwang University, Korea. sangkim@wku.ac.kr


The aim of this study was to evaluate the remineralization of interdentally stripped teeth after fluoride gel or hydroxyapatite paste application.
After interdental stripping, 1.23% fluoride gel or 10% hydroxyapatite paste was applied three times a day, with a duration of four minutes, for a week. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) were used to compare the change of surface contents and crystal structures before and after the application of fluoride gel or hydroxyapatite paste.
EDS analysis indicated that calcium contents were increased after 10% HAp paste application on stripped enamel (p < 0.01). SEM view showed that enamel surfaces in groups of 1.23% APF gel or 10% HAp paste application were smoother than those of control group, which was regarded as filling of the pore structure. And pores between crystal structures in groups treated with 1.23% APF gel or 10% HAp paste were smaller than those of control group.
Application of APF or HAp on stripped enamel could positively influence on the surface contents or crystal structure.


EDS; Enamel stripping; Remineralization; Surface contents of enamel; Crystal structure of enamel
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