title: Enhanced reliability of yttria-stabilized zirconia for dental applications.
abstract: An increasing number of dental applications based on yttria-stabilized zirconia (3 Y-TZP) have been developed in recent years as a result of the advances and versatility of dry-processing and soft machining at the pre-sintered state. Nonetheless, the long-term surface stability of these materials in humid environment is still a matter of concern and may limit its application. In this work, a simple method to prevent hydrothermal degradation on the zirconia surface is studied in detail. This method involves the infiltration of pre-sintered parts with optimized solutions containing Ce salts, leaving unchanged the other processing steps, allowing the diffusion of Ce during conventional sintering. Several pre-sintering conditions, solution concentrations and sintering temperatures were studied and characterized, obtaining working parameters for the production of zirconia parts with mechanical properties similar to standard 3 Y-TZP and high resistance to hydrothermal aging. This optimal combination was obtained with the 1150 °C pre-sintering temperature, 50 wt.% solution and sintering at 1450 °C, leading to a superficial CeO2 content of about 3 mol.%.
authors: Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain; Center for Research in NanoEngineering CRnE, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain.
authors: Erik
authors: E
authors: Camposilvan
authors: Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain; Center for Research in NanoEngineering CRnE, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain.
authors: Fernando Garcia
authors: FG
authors: Marro
authors: Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain; Center for Research in NanoEngineering CRnE, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain.
authors: Alvaro
authors: A
authors: Mestra
authors: Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain; Center for Research in NanoEngineering CRnE, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain. Electronic address: marc.j.anglada@upc.edu.
authors: Marc
authors: M
authors: Anglada
mesh_terms: D001178:Arthroplasty; D002516:Ceramics; D002563:Cerium / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry*; D003799:Dental Stress Analysis / Q000379:methods*; D006813:Humidity; D008422:Materials Testing; D016062:Porosity; D011312:Pressure; D015203:Reproducibility of Results; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D015019:Yttrium / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
chemical_list: D003764:Dental Materials; D002563:Cerium; D015019:Yttrium; C030583:ceric oxide; D015040:Zirconium; C028541:zirconium oxide; C091417:yttria
keywords: Ceria; Dental implant; Infiltration; Low temperature degradation; Zirconia