title: Evaluation of bond strength of self-adhesive cements to dentin with or without application of adhesive systems.
abstract: OBJECTIVE
  To evaluate the bond strength of indirect restorations to dentin using self-adhesive cements with and without the application of adhesive systems.
  
  
  METHODS
  Seventy-two bovine incisors were used, in which the buccal surfaces were ground down to expose an area of dentin measuring a minimum of 4 x 4 mm. The indirect resin composite Resilab was used to make 72 blocks, which were cemented onto the dentin surface of the teeth and divided into 4 groups (n = 18): group 1: self-adhesive resin cement BiFix SE, applied according to manufacturer's recommendations; group 2: self-adhesive resin cement RelyX Unicem, used according to manufacturer's recommendations; group 3: etch-and-rinse Solobond M adhesive system + BiFix SE; group 4: etch-and-rinse Single Bond 2 adhesive system + RelyX Unicem. The specimens were sectioned into sticks and subjected to microtensile testing in a universal testing machine (EMIC DL- 200 MF). Data were subjected to one-way ANOVA and Tukey's test (α = 5%).
  
  
  RESULTS
  The mean values (± standard deviation) obtained for the groups were: group 1: 15.28 (± 8.17)a, group 2: 14.60 (± 5.21)a, group 3: 39.20 (± 9.98)c, group 4: 27.59 (± 6.57)b. Different letters indicate significant differences (ANOVA; p = 0.0000).
  
  
  CONCLUSIONS
  The application of adhesive systems before self-adhesive cements significantly increased the bond strength to dentin. In group 2, RelyX Unicem associated with the adhesive system Single Bond 2 showed significantly lower mean tensile bond strengths than group 3 (BiFix SE associated with the etch-and-rinse Solobond M adhesive system).
authors: Department of Restorative Dentistry, Sao Jose dos Campos School of Dentistry, Sao Paulo State University - UNESP, Sao Paulo, Brazil.
authors: Daphne Câmara
authors: DC
authors: Barcellos
authors: Graziela Ribeiro
authors: GR
authors: Batista
authors: Melissa Aline
authors: MA
authors: Silva
authors: Patrícia Maria
authors: PM
authors: Rangel
authors: Carlos Rocha
authors: CR
authors: Torres
authors: Marcelo
authors: M
authors: Fava
mesh_terms: D000269:Adhesives; D000818:Animals; D002417:Cattle; D001840:Dental Bonding; D003738:Dental Cements; D003799:Dental Stress Analysis; D003804:Dentin; D017220:Dentin-Bonding Agents / Q000737:chemistry; D007284:Inlays; D008422:Materials Testing; D019279:Resin Cements / Q000737:chemistry; D013718:Tensile Strength
chemical_list: D000269:Adhesives; C554641:Adper single bond 2; D003738:Dental Cements; D017220:Dentin-Bonding Agents; D019279:Resin Cements; C425825:Solobond M