caf2 production amounts were relatively higher in a group of one time 2 % naf application with the use of f-ion than those of control group as only fluoride solution applicated and it were the most in a group of 10 times fluoride application with the use of f-ion , through the examining by x-ray diffractometer , so it was estimated that f-ion technique of fluoride application would increase the fluoride penetration effect .
C0037508
naf
C0016327
fluoride