Assertion: gas's amount | /r/HasProperty | beneficial
Facets:
value: for bone strength
type: CAUSE
value: for the strengthening of dental enamel
type: PURPOSE
Source sentences:
text: Fluorine is not essential for humans and mammals, but small amounts are known to be beneficial for the strengthening of dental enamel (where the formation of fluorapatite makes the enamel more resistant to attack, from acids produced by bacterial fermentation of sugars).
text: Small amounts of fluorine may be beneficial for bone strength, but the latter has not been definitively established.