Answer: fluoride

AnswerCrossword Clue
FLUORIDECrest component
FLUORIDEToothpaste additive
FLUORIDEControversial compound.
FLUORIDEToothpaste ingredient.
FLUORIDETooth-saving compound?
FLUORIDEProtector of some canines
FLUORIDEEnamel strengthener
fluoridechemical compound containing fluorine
fluoridea compound of fluorine, also FLUORID