title: In Vitro Study of the Sealing Ability of Cements for Zirconia Restorations.
abstract: OBJECTIVE
  The micropercolation testing of dental materials is currently used to evaluate the sealing ability. The aim of the present study is to compare the sealing ability of distinct assembling materials for zirconium oxide peripheric crowns.
  
  
  METHODS
  One hundred teeth were prepared to be thermocycled after being distributed at random in 10 groups each containing 10 specimens (group 1: Fuji One; group 2: Fuji Plus; group 3: Variolink II; group 4: RelyX Ultimate; group 5: Multilink; group 6: Panavia F2.0; group 7: Bifix QM; group 8: RelyX Unicem 2; group 9: Maxcem Elite; group 10: Bifix SE).
  
  
  RESULTS
  RelyX Unicem 2 and RelyX Ultimate yielded high imperviousness percentages. The sealing ability in the vestibular area and lingual area is indeed best in the presence of these two materials. Our results show no difference whether the chamfer is situated in the enamel or in the dentin.
  
  
  CONCLUSIONS
  A zirconium crown should be preferably cemented with a glass-ionomer cement modified by addition of resin material.
authors.affiliation: Department of Stomatology and Dentistry, Erasmus Hospital, Université Libre de Bruxelles, Brussels, Belgium.|Laboratory of Physiology and Pharmaceutics, Faculty of Medicine, Université Libre de Bruxelles, Brussels, Belgium.
authors.forename: Sibel
authors.initials: S
authors.lastname: Cetik
authors.affiliation: Department of Stomatology and Dentistry, Erasmus Hospital, Université Libre de Bruxelles, Brussels, Belgium.
authors.forename: Thomas
authors.initials: T
authors.lastname: Solor-Bouvier
authors.affiliation: Department of Dental Care and Consultation, Maison Blanche Hospital, Faculty of Odontology, University of Reims Champagne, Reims, France.
authors.forename: Estelle
authors.initials: E
authors.lastname: Schittly
authors.affiliation: Department of Stomatology and Dentistry, Erasmus Hospital, Université Libre de Bruxelles, Brussels, Belgium.
authors.forename: Ramin
authors.initials: R
authors.lastname: Atash
mesh_terms: D003442:Crowns; D003738:Dental Cements; D003763:Dental Leakage / Q000517:prevention & control; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing; D019279:Resin Cements; D015040:Zirconium
chemical_list: D003738:Dental Cements; C483701:Rely X Unicem; D019279:Resin Cements; D015040:Zirconium; C028541:zirconium oxide
keywords: Enamel; dentin; imperviousness; margin; sealing ability