title: A study of discoloration of the gingiva by artificial crowns.
abstract: In this study, soft tissue discoloration including the marginal gingiva, gingival papilla, and attached gingiva were evaluated in subjects with artificial crowns and compared to the soft tissue of natural teeth using a spectrophotometer. Gingivae around artificial crowns had a lower value (L*) and chroma (C*ab) than the gingivae surrounding natural teeth. Hue (Hab o) shifts toward red-purple were frequently noted. There was generally a more noticeable color difference (E*ab) in the marginal gingiva and gingival papilla of teeth with crowns than was found in the attached tissue.
authors.affiliation: Department of Removable Partial Denture Prosthodontics, School of Dentistry, Nihon University, Tokyo, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Takeda
authors.forename: K
authors.initials: K
authors.lastname: Ishigami
authors.forename: A
authors.initials: A
authors.lastname: Shimada
authors.forename: K
authors.initials: K
authors.lastname: Ohki
mesh_terms: D000328:Adult; D003116:Color; D003442:Crowns / Q000009:adverse effects*; D005260:Female; D005881:Gingiva / Q000737:chemistry / Q000473:pathology; D005882:Gingival Diseases / Q000209:etiology*; D006801:Humans; D007180:Incisor; D008297:Male; D008437:Maxilla; D016876:Metal Ceramic Alloys; D010859:Pigmentation Disorders / Q000209:etiology*
chemical_list: D016876:Metal Ceramic Alloys