title: Surface characteristics and castability of Zr-14Nb alloy dental castings.
abstract: The purpose of this study was to evaluate mechanical properties, surface characteristics and castability of Zr-14Nb dental castings. The mean 0.2% proof and ultimate tensile strengths of Zr-14Nb were approximately 68% and 76% those of Ti-6Al-7Nb, respectively, while they were comparable to Co-29Cr-6Mo. Elongation of Zr-14Nb was the highest of all alloys tested. The hardened reaction layer was formed on the surfaces of the Zr-14Nb castings. The layer consisted of oxygen and aluminum originating form investment. The castability of Zr-14Nb was comparable to that of Ti-6Al-7Nb. Dental castings of Zr-14Nb reveal mechanical properties that were within the range of the other dental alloys. Further improvements in castability and minimization of the surface reaction layer are needed for applications in dental prostheses.
authors.affiliation: Removable Partial Prosthodontics, Department of Masticatory Function Rehabilitation, Graduate School, Tokyo Medical and Dental University.
authors.forename: Yuka
authors.initials: Y
authors.lastname: Kajima
authors.forename: Hisashi
authors.initials: H
authors.lastname: Doi
authors.forename: Atsushi
authors.initials: A
authors.lastname: Takaichi
authors.forename: Takao
authors.initials: T
authors.lastname: Hanawa
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Wakabayashi
mesh_terms: D003735:Dental Casting Technique; D008855:Microscopy, Electron, Scanning; D009556:Niobium / Q000737:chemistry*; D013499:Surface Properties; D015040:Zirconium / Q000737:chemistry*
chemical_list: D009556:Niobium; D015040:Zirconium