Assertion: tartar | /r/CapableOf | form along the gumline
Facets:
value: within the narrow sulcus
type: LOCATION
Source sentences:
text: Calculus can form both along the gumline, where it is referred to as supragingival ("above the gum"), and within the narrow sulcus that exists between the teeth and the gingiva, where it is referred to as subgingival ("below the gum").