title: The effect of recasting on the oxidation layer of a palladium-silver porcelain alloy.
abstract: The oxidation zone of a commercial palladium-silver porcelain alloy was compared after repeated casting with and without the addition of new alloy. The intensity of palladium, silver, tin, indium, and O K-alpha near the oxidation zone was analyzed with XMA. The intensity curves of tin, silver, and oxygen increased progressively through each generation despite the addition of new alloy. The thickness of the oxidation zone and the microporosities at the internal oxidation zone increased through each generation without the addition of new alloy. Although the findings indicated that the oxidation zone was favorably formed by adding new alloy, 50% by weight, for four generations, the silver and metallic oxides of the oxidation zone increased through each generation. The reuse of the palladium-silver porcelain alloy remains questionable.
authors.affiliation: Kaohsiung Medical College, School of Dentistry, Taiwan, Republic of China.
authors.forename: J M
authors.initials: JM
authors.lastname: Hong
authors.forename: M E
authors.initials: ME
authors.lastname: Razzoog
authors.forename: B R
authors.initials: BR
authors.lastname: Lang
mesh_terms: D003722:Dental Alloys; D003735:Dental Casting Technique; D003776:Dental Porcelain; D004577:Electron Probe Microanalysis; D006801:Humans; D007204:Indium; D010087:Oxides; D010165:Palladium; D012834:Silver; D013499:Surface Properties; D014001:Tin
chemical_list: D003722:Dental Alloys; D010087:Oxides; D007204:Indium; D003776:Dental Porcelain; D012834:Silver; D010165:Palladium; D014001:Tin