title: The effects of different desensitizing agents on the shear bond strength of adhesive resin cement to dentin.
abstract: BACKGROUND
  The choice of desensitizing agent can affect the bond strength of adhesive resin cement to dentin.
  
  
  OBJECTIVE
  The purpose of this study was to evaluate the effects of different dentin desensitizing agents on the bond strength of adhesive resin cement to dentin.
  
  
  METHODS
  Sixty specimen teeth were randomly divided into six groups (n=10). Five groups of teeth were treated with a desensitizing agent containing sodium and calcium fluoride in cellulose alone, hydroxyethyl methacrylate (HEMA), benzalkonium chloride and sodium fluoride, HEMA and glutaraldehyde, an ormocer-based or a resin-based dentin desensitizer. The remaining 10 specimens served as controls. Adhesive resin cement was applied to the dentin surface. The shear bond strength was measured using a universal testing machine at a 0.5 mm/minute crosshead speed. The data were analyzed statistically with one-way analysis of variance and a Tukey's Honestly Significant Difference (HSD) test (α=0.05). In addition, dentin surfaces were examined by a scanning electron microscope.
  
  
  RESULTS
  THE lowest bond strength was in the group treated with desensitizing agent containing sodium and calcium fluoride and the highest bond strength was from the group treated with desensitizing agent containing HEMA and sodium fluoride.
  
  
  CONCLUSIONS
  Desensitizing agents containing sodium and calcium fluoride reduced the bond strength of adhesive resin cement.
  
  
  CONCLUSIONS
  The type of desensitizer used is an important factor regarding the bond strength of adhesive resin cements to dentin.
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey. skulunk@omu.edu.tr
authors.forename: Safak
authors.initials: S
authors.lastname: Külünk
authors.forename: Duygu
authors.initials: D
authors.lastname: Saraç
authors.forename: Tolga
authors.initials: T
authors.lastname: Külünk
authors.forename: Ozlem
authors.initials: O
authors.lastname: Karakaş
mesh_terms: D001840:Dental Bonding; D003804:Dentin / Q000737:chemistry; D057133:Dentin Desensitizing Agents / Q000737:chemistry / Q000494:pharmacology*; D006801:Humans; D011897:Random Allocation; D019279:Resin Cements / Q000737:chemistry; D033081:Shear Strength / Q000187:drug effects*
chemical_list: D057133:Dentin Desensitizing Agents; D019279:Resin Cements; C095998:Adhesive cement