title: Light harmony of crowns and roots: understanding and managing the black line phenomenon.
abstract: Today's patients and clinicians have high expectations for aesthetic excellence. In order to deliver excellence, dental health care providers must be more aware of the complexity of nature, particularly when the anterior segments of natural dentition are involved. This article addresses the relationship of soft tissues, crowns, and roots and their relationship to light transmission and perception.
authors.forename: R B
authors.initials: RB
authors.lastname: Zena
authors.forename: L J
authors.initials: LJ
authors.lastname: Abbott
mesh_terms: D003116:Color; D003442:Crowns; D003776:Dental Porcelain; D016379:Denture, Partial, Fixed, Resin-Bonded; D004955:Esthetics, Dental; D006801:Humans; D007180:Incisor; D008027:Light
chemical_list: D003776:Dental Porcelain