title: Translucency and flexural strength of monolithic translucent zirconia and porcelain-layered zirconia.
abstract: This study aims to investigate the effectiveness of monolithic translucent TZP with different colors and porcelain-layered TZP by evaluating their colors and strengths. Different mixing ratios of Zpex to Zpex-Yellow as translucent TZP, conventional opaque TZP (TZ-3YB-E) (Tosoh, Tokyo) as a control, and veneering porcelain (CERABIEN ZR, body porcelain, Noritake, Tokyo) with shade A3 as a typical shade. Disk-shaped specimens of 13 mm diameter and 1.5 mm thickness were prepared. These specimens were observed under reflected and transmitted light, and the translucency parameter (TP) values were measured. Strength was also evaluated with flexural strength in a biaxial bending test. The TP values of the monolithic TZP, Zpex100>Zpex70>Zpex50>TZ3YB, were larger in this order. The flexural strength of all the monolithic TZP showed approximately 1,000 MPa. It is suggested that colored translucent TZP is clinically useful when used as monolithic restorations.
authors.affiliation: Division of Oral Implants Research, Oral Health Science Center, Tokyo Dental College.
authors.forename: Fumiyori
authors.initials: F
authors.lastname: Matsuzaki
authors.forename: Hideshi
authors.initials: H
authors.lastname: Sekine
authors.forename: Shinya
authors.initials: S
authors.lastname: Honma
authors.forename: Takuya
authors.initials: T
authors.lastname: Takanashi
authors.forename: Katsunori
authors.initials: K
authors.lastname: Furuya
authors.forename: Yasutomo
authors.initials: Y
authors.lastname: Yajima
authors.forename: Masao
authors.initials: M
authors.lastname: Yoshinari
mesh_terms: D003116:Color; D003764:Dental Materials / Q000737:chemistry; D003776:Dental Porcelain / Q000737:chemistry*; D003799:Dental Stress Analysis; D003801:Dental Veneers; D008422:Materials Testing; D018583:Pliability; D013499:Surface Properties; D013718:Tensile Strength; D015019:Yttrium / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
chemical_list: D003764:Dental Materials; C499362:yttria stabilized tetragonal zirconia; D003776:Dental Porcelain; D015019:Yttrium; D015040:Zirconium