Assertion: composite resin | /r/HasProperty | introduced as alternative
Facets:
value: in the late 1960s
type: TEMPORAL
value: to silicates
type: TRANSITIVE-OBJECT
value: to unfulfilled resins
type: TRANSITIVE-OBJECT
Source sentences:
text: In the late 1960s, composite resins were introduced as an alternative to silicates and unfulfilled resins, which were frequently used by clinicians at the time.