title: Shear bond strength of veneering porcelain to porous zirconia.
abstract: In this study, two types of porous zirconia and dense zirconia were used. The flexural strength of non-layered zirconia specimens and those of the layered zirconia specimens with veneering porcelain were examined. Furthermore, the shear bond strength of veneering porcelain to zirconia was examined. The flexural strength of the non-layered specimens was 1,220 MPa for dense zirconia and 220 to 306 MPa for porous zirconia. The flexural strength of the layered specimens was 360 MPa for dense zirconia and 132 to 156 MPa for porous zirconia, when a load was applied to the porcelain side. The shear bond strength of porcelain veneered to dense zirconia was 27.4 MPa and that of porcelain veneered to porous zirconia was 33.6 to 35.1 MPa. This suggests that the veneering porcelain bonded strongly to porous zirconia although porous zirconia has a lower flexural strength than dense zirconia.
authors.affiliation: Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry.
authors.forename: Takashi
authors.initials: T
authors.lastname: Nakamura
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Sugano
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Usami
authors.forename: Kazumichi
authors.initials: K
authors.lastname: Wakabayashi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Ohnishi
authors.forename: Tohru
authors.initials: T
authors.lastname: Sekino
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Yatani
mesh_terms: D003776:Dental Porcelain; D003801:Dental Veneers; D016062:Porosity; D033081:Shear Strength; D015040:Zirconium
chemical_list: D003776:Dental Porcelain; D015040:Zirconium