Assertion: tartar | /r/CapableOf | serve as trap
Facets:
value: for increased plaque formation
type: PURPOSE
value: for retention
type: PURPOSE
Source sentences:
text: Calculus is detrimental to gingival health because it serves as a trap for increased plaque formation and retention; thus, calculus, along with other factors that cause a localized build-up of plaque, is referred to as a secondary aetiology of periodontitis.