title: Shear bond strength of different adhesive systems to primary dentin and enamel.
abstract: The aims of this study were to evaluate the shear bond strength (SBS) off our adhesive systenms applied to primary dentin and enamel and verify, after SBS testing, the failure mode of the adhesive interface. Sixty extracted sound primary molars were selected and crowns were sectioned in a mesial-distal direction. Specimens were randomly assigned into two groups (adhesion to enamel and adhesion to dentin) and then subdivided into four subgroups according to the adhesive system (n=15). Scotchbond Multi-Purpose (SMP)--Single Bond (SB)--Clearfil SE Bond (and Adper Prompt L-Pop (APL)--SBS tests were performed and the obtained values were statistically analyzed using ANOVA and Tukey tests (p < 0.05). The failure mode analysis was performed with a Scanning Electron Microscope (XL-30, Philips). SBS mean values on enamel were [MPa (SD)]: SMP--2789 (749); SB--23.92 (8.8); CSB--24.36 (6.69), APL--25.96 (4.08); and on dentin: SMP--17.29 (4.25) SB--18.2 (8.74); CSB--16.13 (714); APL--6. 04 (3.35). The predominant failure mode was cohesive (primarily of the bonding agent). On enamel SBS was statistically similar for all four adhesives. On dentin SBS ofAPL was lower than the other tested adhesives.
authors.affiliation: ca_miranda@yahoo.com.br
authors.forename: Carla
authors.initials: C
authors.lastname: Miranda
authors.forename: Luiz Henrique Maykot
authors.initials: LH
authors.lastname: Prates
authors.forename: Ricardo de Souza
authors.initials: Rde S
authors.lastname: Vieira
authors.forename: Maria Cristina Marino
authors.initials: MC
authors.lastname: Calvo
mesh_terms: D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D001840:Dental Bonding; D003743:Dental Enamel / Q000648:ultrastructure*; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D008963:Molar; D019279:Resin Cements / Q000737:chemistry; D033081:Shear Strength; D013314:Stress, Mechanical; D013499:Surface Properties; D014094:Tooth, Deciduous / Q000648:ultrastructure*
chemical_list: C438313:Clearfil SE Bond; D017220:Dentin-Bonding Agents; C408584:Prompt L-Pop; D019279:Resin Cements; C084018:Scotchbond Multi-Purpose; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate