title: Mechanical properties, phase stability, and biocompatibility of (Y, Nb)-TZP/Al(2)O(3) composite abutments for dental implant.
abstract: ZrO(2)/Al(2)O(3) composites were prepared by mixing a tetragonal ZrO(2), stabilized by 5.31 mol% Y(2)O(3) and 4.45 mol% Nb(2)O(5), and various amounts of Al(2)O(3). Influence of the amount of Al(2)O(3) on strength and toughness and tetragonal phase stability in the composites under autoclave conditions was investigated. In addition, in vitro and in vivo biocompatibility of the composites was examined. The composite, prepared with addition of 20 vol% Al(2)O(3), exhibited the highest strength of 700 MPa and toughness of 8.1 MPa. m(1/2) and showed no hydrothermal degradation while aging in an autoclave. The biocompatibility of the composite exhibited no cytotoxicity and no significant adverse soft-tissue response for up to 3 months implant period in guinea pigs.
authors.affiliation: Ceramics Division, Korea Institute of Science and Technology, Seoul, Korea.
authors.forename: D J
authors.initials: DJ
authors.lastname: Kim
authors.forename: M H
authors.initials: MH
authors.lastname: Lee
authors.forename: D Y
authors.initials: DY
authors.lastname: Lee
authors.forename: J S
authors.initials: JS
authors.lastname: Han
mesh_terms: D000537:Aluminum Oxide; D000818:Animals; D015921:Dental Implants; D003764:Dental Materials; D006168:Guinea Pigs; D013499:Surface Properties; D015040:Zirconium
chemical_list: C413709:(Y,Nb)-TZP-Al(2)O(3) composite; D015921:Dental Implants; D003764:Dental Materials; D015040:Zirconium; D000537:Aluminum Oxide; C028541:zirconium oxide