title: [Bond strength evaluation of four adhesive systems to dentin in vitro].
abstract: OBJECTIVE
  To compare the adhesive strength and observe the bonding interface. According to statistic analysis and scanning electron microscope (SEM) observation, the resistance capacity of four adhesive systems is evaluated.
  
  
  METHODS
  Prime & Bond NT (PBNT), Tetric N-Bond (TNB), Clearfil SE Bond (CSEB), G Bond (GB) were bonded to the occlusal surfaces and mesial surfaces of third molars respectively. The mesial resins received shear force experiment and the fracture load were recorded. The tensile bond strength (TBS) of the remaining parts were tested. The interfacial configuration were observed under SEM.
  
  
  RESULTS
  In the shear bond strength (SBS) experiment, PBNT and TNB showed the best result, but there was no significant difference between them (P>0.05). The SBS of PBNT was stronger than that of CSEB and GB (P<0.05). The SBS of TNB was stronger than that of GB (P<0.05). There was no significant difference between TNB and CSEB (P>0.05). In accordance with the shear force result, the TBS of PBNT and TNB was larger than CSEB and GB (P<0.05). Under SEM, resin tags of PBNT and TNB were longer and slender, the bonding layer was thick. Resin tags of CSEB were shorter, the ones of GB were the fewest and shortest.
  
  
  CONCLUSIONS
  Compared to self-etching system, total-etching system could reach better bonding strength. There is some connection between the interfacial configuration of adhesives and bond strength of them.
authors.affiliation: State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China.
authors.forename: Ximei
authors.initials: X
authors.lastname: Xiao
authors.forename: Lu
authors.initials: L
authors.lastname: Xing
authors.forename: Haiping
authors.initials: H
authors.lastname: Xu
authors.forename: Zhe
authors.initials: Z
authors.lastname: Jiang
authors.forename: Qin
authors.initials: Q
authors.lastname: Su
mesh_terms: D000269:Adhesives; D003188:Composite Resins; D001840:Dental Bonding; D003804:Dentin; D017220:Dentin-Bonding Agents; D006801:Humans; D066298:In Vitro Techniques; D008689:Methacrylates; D011109:Polymethacrylic Acids; D019279:Resin Cements
chemical_list: D000269:Adhesives; C438313:Clearfil SE Bond; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C498353:G-Bond; D008689:Methacrylates; D011109:Polymethacrylic Acids; C425843:Prime and Bond NT; D019279:Resin Cements; C090969:Tetric