title: Current status of zirconia-based fixed restorations.
abstract: Zirconium dioxide (zirconia) ceramics are currently used for fixed restorations as a framework material due to their mechanical and optical properties. This review article describes the current status of zirconia-based fixed restorations, including results of current in vitro studies and the clinical performance of these restorations. Adaptation of zirconia-based restorations fabricated with CAD/CAM technology is within an acceptable range to meet clinical requirements. In terms of fracture resistance, zirconia-based fixed partial dentures (FPDs) have the potential to withstand physiological occlusal forces applied in the posterior region, and therefore provide interesting alternatives to metal-ceramic restorations. Clinical evaluations have indicated an excellent clinical survival of zirconia-based FPDs and crown restorations. However, some clinical studies have revealed a high incidence of chipping of veneered porcelain. Full-coverage zirconia-based restorations with adequate retention do not require resin bonding for definitive cementation. Resin bonding, however, may be advantageous in certain clinical situations and is a necessity for bonded restorations, such as resin-bonded FPDs. Combined surface treatment using airborne particle abrasion and specific adhesives with a hydrophobic phosphate monomer are currently reliable for bonding to zirconia ceramics. Further clinical and in vitro studies are needed to obtain long-term clinical information on zirconia-based restorations.
authors.affiliation: Department of Fixed Prosthodontics, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan. komine@dent.nihon-u.ac.jp
authors.forename: Futoshi
authors.initials: F
authors.lastname: Komine
authors.forename: Markus B
authors.initials: MB
authors.lastname: Blatz
authors.forename: Hideo
authors.initials: H
authors.lastname: Matsumura
mesh_terms: D002986:Clinical Trials as Topic; D017076:Computer-Aided Design; D003442:Crowns; D001840:Dental Bonding; D018772:Dental Marginal Adaptation; D003776:Dental Porcelain / Q000737:chemistry; D017267:Dental Prosthesis Design; D003799:Dental Stress Analysis; D003830:Denture, Partial, Fixed; D006801:Humans; D015019:Yttrium; D015040:Zirconium
chemical_list: C499362:yttria stabilized tetragonal zirconia; D003776:Dental Porcelain; D015019:Yttrium; D015040:Zirconium; C028541:zirconium oxide