title: Phase transformation of a new generation yttria-stabilized zirconia femoral head after total hip arthroplasty.
abstract: We examined a new-generation yttria-stabilized zirconia head manufactured by NGK 1 year after total hip arthroplasty. Monoclinic content of the retrieved head was twice that of the unused head at the pole and equator. A fourfold increase in monoclinic content was observed at 5 mm below the equator. Transformation from the tetragonal phase to the monoclinic phase occurred in the new generation zirconia with alumina doping within a relatively short period in vivo.
authors.affiliation: Department of Orthopedic Surgery, Gracia Hospital, 6-14-1 Aomadani-Nishi, Minoo, 562-8567, Japan.
authors.forename: Yasuhisa
authors.initials: Y
authors.lastname: Hayaishi
authors.forename: Hidenobu
authors.initials: H
authors.lastname: Miki
authors.forename: Hideki
authors.initials: H
authors.lastname: Yoshikawa
authors.forename: Nobuhiko
authors.initials: N
authors.lastname: Sugano
mesh_terms: D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D003776:Dental Porcelain; D005260:Female; D005270:Femur Head / Q000000981:diagnostic imaging / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D016876:Metal Ceramic Alloys; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography; D013499:Surface Properties; D013997:Time Factors; D015019:Yttrium; D015040:Zirconium
chemical_list: D016876:Metal Ceramic Alloys; C499362:yttria stabilized tetragonal zirconia; D003776:Dental Porcelain; D015019:Yttrium; D015040:Zirconium