title: Microtensile dentin bond strength of fifth with five seventh-generation dentin bonding agents after thermocycling: An in vitro study.
abstract: OBJECTIVE
  The objective of this in vitro study was to compare the microtensile dentin bond strength (μTBS) of five seventh-generation dentin bonding agents (DBA) with fifth-generation DBA before and after thermocycling.
  
  
  METHODS
  Ten extracted teeth were assigned to fifth generation control group (optibond solo) and each of the five experimental groups namely, Group I (G-Bond) ,Group II (S(3) Clearfil), Group III (One Coat 7.0), Group IV (Xeno V), and Group V (Optibond all in one). The crown portions of the teeth were horizontally sectioned below the central groove to expose the dentin. The adhesive resins from all groups were bonded to the teeth with their respective composites. Specimens of sizes 1 × 1 × 6 mm(3) were obtained. Fifty specimens that bonded to dentin from each group were selected. Twenty-five of the specimens were tested for debonding without thermocycling and the remaining were subjected to thermocycling followed by μTBS testing. The data were analyzed with one-way ANOVA and Dunnett's-test for comparison with the reference group(Vth Generation).
  
  
  RESULTS
  There was no significant difference (P > 0.05) between the fifth- and seventh-generation adhesives before and after thermocycling. The results of our study showed significantly higher value (P < 0.05) of μTBS of seventh-generation Group II (Clearfil S(3)) compared to the fifth-generation before and after thermocycling.
  
  
  CONCLUSIONS
  The study demonstrated that the Clearfil S(3) bond had the highest μTBS values. In addition, of the five tested seventh-generation adhesive resins were comparable to the fifth-generation DBA.
authors.affiliation: Department of Conservative Dentistry and Endodontics, Karnavati School of Dentistry, Ahmedabad, India.
authors.forename: Bruhvi
authors.initials: B
authors.lastname: Poptani
authors.forename: K S
authors.initials: KS
authors.lastname: Gohil
authors.forename: Jaishree
authors.initials: J
authors.lastname: Ganjiwale
authors.forename: Manisha
authors.initials: M
authors.lastname: Shukla