Paul, Stefan J Conventional visual vs spectrophotometric shade taking for porcelain-fused-to-metal crowns: a clinical comparison. [electronic resource] - The International journal of periodontics & restorative dentistry Jun 2004 - 222-31 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0198-7569 Subjects--Topical Terms: AdultChoice BehaviorColorColor PerceptionCrownsDental Porcelain--chemistryDental Prosthesis Design--methodsFemaleHumansIncisor--anatomy & histologyMaleMetal Ceramic Alloys--chemistryMiddle AgedSpectrophotometryStatistics, Nonparametric