title: Effects of recasting on the chemical composition, microstructure, microhardness, and ion release of 3 dental casting alloys and titanium.
abstract: This study evaluated the effects of recasting on high noble, noble, and nickel-based alloys, as well as on titanium. Four specimens of each material were cast and recast 7 times. Chemical composition, microstructure, microhardness, and ion release were determined before and after the first cast and following each recast. Zinc and tin concentrations in the high noble alloy decreased significantly with recasting; consequently, the release of these ions decreased as well. A significant increase in Vickers hardness appeared in the fifth recast in both the high noble alloy and titanium. The noble alloy and the nickel-based alloy demonstrated great stability after 7 recasts. The results suggest not recasting titanium.
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, Universitat de Barcelona, Spain.
authors.forename: Maria
authors.initials: M
authors.lastname: Peraire
authors.forename: Jordi
authors.initials: J
authors.lastname: Martinez-Gomis
authors.forename: Josep M
authors.initials: JM
authors.lastname: Anglada
authors.forename: Josep
authors.initials: J
authors.lastname: Bizar
authors.forename: Juan
authors.initials: J
authors.lastname: Salsench
authors.forename: Francesc J
authors.initials: FJ
authors.lastname: Gil
mesh_terms: D000704:Analysis of Variance; D002858:Chromium Alloys / Q000737:chemistry; D003722:Dental Alloys / Q000737:chemistry; D003735:Dental Casting Technique; D017743:Equipment Reuse; D006047:Gold Alloys / Q000737:chemistry; D006244:Hardness; D007477:Ions / Q000032:analysis; D008855:Microscopy, Electron, Scanning; D009532:Nickel / Q000737:chemistry; D014001:Tin / Q000032:analysis; D014025:Titanium / Q000737:chemistry; D015032:Zinc / Q000032:analysis
chemical_list: D002858:Chromium Alloys; D003722:Dental Alloys; D006047:Gold Alloys; D007477:Ions; D014001:Tin; D009532:Nickel; D014025:Titanium; D015032:Zinc