title: Effect of different metal ceramic alloys on the color of opaque and dentin porcelain.
abstract: Certain metal ceramic alloys alter the final color of bonded porcelain. Contradicting results, inconsistent test designs, and incomplete alloy selections have led to some confusion. In this study, differential colorimetric analysis was done at the opaque and dentin porcelain stages with five major types of metal ceramic alloys. The color stability of the porcelain on the high-noble metal alloys was found to be excellent. The palladium-silver and nickel-chromium alloys resulted in significant color changes of the dentin porcelain only. The greatest changes in color were found with the palladium-silver alloy, which resulted in a higher yellow-green saturation. The nickel-chromium alloy also produced a color change, although not as severe, resulting in a porcelain shade with a reduced Value or lightness.
authors.affiliation: Department of Fixed Prosthodontics, University of California, School of Dentistry, Los Angeles.
authors.forename: B J
authors.initials: BJ
authors.lastname: Crispin
authors.forename: R R
authors.initials: RR
authors.lastname: Seghi
authors.forename: H
authors.initials: H
authors.lastname: Globe
mesh_terms: D002858:Chromium Alloys / Q000737:chemistry; D003116:Color; D003124:Colorimetry / Q000379:methods; D003722:Dental Alloys / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry*; D003804:Dentin; D006047:Gold Alloys / Q000737:chemistry; D006801:Humans; D010165:Palladium / Q000737:chemistry; D012834:Silver / Q000737:chemistry; D013499:Surface Properties
chemical_list: D002858:Chromium Alloys; D003722:Dental Alloys; D006047:Gold Alloys; D003776:Dental Porcelain; D012834:Silver; D010165:Palladium