title: Effects of a convenient silica-coating treatment on shear bond strengths of porcelain veneers on zirconia-based ceramics.
abstract: Porcelain veneering of zirconia is necessary, but chipping of the veneer may cause clinical problems. We investigated the effects of silica coating to improve the bond strength between porcelain veneers and zirconia-based ceramics. The ceramics tested were zirconia/alumina nanocomposites stabilized with ceria. Three surface treatments, grinding with a carborundum point (CA), sandblasting with alumina (SB), and Silano-Pen treatment (SP), were performed. Untreated specimens (NT) were examined as a control. The surface roughnesses and contact angles after treatment were measured. Shear bond tests were conducted, and the average strengths were calculated. EPMA was used for elemental identifications and surface observations. The bond strengths with SP were 20.00±3.43MPa and were significantly larger than that (15.35±3.12 MPa) of NT (p<0.05). However, differences among treated specimens were not significant. Moreover, SP gave superior wettability, and smoothness as good as NT. These data suggest that SP affects the bond strength between zirconia and a porcelain veneer.
authors.affiliation: Department of Oral Biomaterials & Technology, Showa University School of Dentistry, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, Japan.
authors.forename: Takuya
authors.initials: T
authors.lastname: Oguri
authors.forename: Yukimichi
authors.initials: Y
authors.lastname: Tamaki
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Hotta
authors.forename: Takashi
authors.initials: T
authors.lastname: Miyazaki
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D017554:Carbon Compounds, Inorganic / Q000737:chemistry; D002563:Cerium / Q000737:chemistry; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry*; D003799:Dental Stress Analysis / Q000295:instrumentation; D003801:Dental Veneers; D004577:Electron Probe Microanalysis; D006358:Hot Temperature; D006801:Humans; D008422:Materials Testing; D053761:Nanocomposites / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry; D033081:Shear Strength; D012821:Silanes / Q000737:chemistry; D012825:Silicon / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D017155:Wettability; D015040:Zirconium / Q000737:chemistry*
chemical_list: D017554:Carbon Compounds, Inorganic; C475766:Ce-TZP-Al2O3; D020099:Coated Materials, Biocompatible; D003764:Dental Materials; D012821:Silanes; C517455:carborundum; D003776:Dental Porcelain; D002563:Cerium; D012822:Silicon Dioxide; D015040:Zirconium; D000537:Aluminum Oxide; C028541:zirconium oxide; D012825:Silicon