title: Shear bond strength of luting agents to fixed prosthodontic restorative core materials.
abstract: BACKGROUND
  Bonding properties of luting cements are important for retention of restorative core materials. The aim of this study was to compare the bonding performance of a resin-modified glass ionomer cement and a self-adhesive resin cement to various fixed prosthodontic core materials.
  
  
  METHODS
  Cylindrical specimens with a thickness of 2 mm and a diameter of 5 mm were fabricated from Au-Pd-Ag, Co-Cr, Ni-Cr-Mo, Ni-Cr-Fe alloys, titanium, zirconia and Empress II (n = 20). Each group was divided into two subgroups to be luted with two different luting agents. Composite resin blocks were cemented onto specimens with RelyXUnicem and FujiCem. A shear bond strength machine with 50 kg load cell and 0.50 mm/min crosshead speed was used. Kruskal Wallis test, Dunn's Multiple Range test and Mann-Whitney-U test were used for statistical analysis. The results were evaluated in a confidence interval of p < 0.05.
  
  
  RESULTS
  The highest bond strength was obtained between Ni-Cr-Fe-RelyXUnicem (8.22 +/- 2.15 MPa) and the lowest was between Empress II-FujiCem (1.48 +/- 0.9 MPa). In FujiCem groups, Co-Cr and Ni-Cr-Fe showed significantly higher bond strength than Au-Pd-Ag and Empress II. In RelyX Unicem groups, Ni-Cr-Fe showed higher bond strength than Empress II.
  
  
  CONCLUSIONS
  The types of luting agents and restorative core materials may have a significant influence on bond strength.
authors.affiliation: Faculty of Dentistry, Yeditepe University, Istanbul, Turkey. capanuray@yahoo.com
authors.forename: N
authors.initials: N
authors.lastname: Capa
authors.forename: Z
authors.initials: Z
authors.lastname: Ozkurt
authors.forename: C
authors.initials: C
authors.lastname: Canpolat
authors.forename: E
authors.initials: E
authors.lastname: Kazazoglu
mesh_terms: D003722:Dental Alloys; D001840:Dental Bonding; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D005899:Glass Ionomer Cements; D008422:Materials Testing; D019279:Resin Cements; D033081:Shear Strength; D013499:Surface Properties; D014025:Titanium; D015040:Zirconium
chemical_list: D003722:Dental Alloys; C542393:FujiCEM; D005899:Glass Ionomer Cements; C483701:Rely X Unicem; D019279:Resin Cements; D003776:Dental Porcelain; D015040:Zirconium; D014025:Titanium; C028541:zirconium oxide