title: Correlation between hybrid layer thickness, resin tag length and microtensile bond strength of a self-etching adhesive system.
abstract: The purpose of this study was to evaluate the correlation between the hybrid layer thickness, resin tag length and resin bond strength of a self-etching adhesive system to sound dentin tissue "in vivo". After performing restorative procedures and tooth extractions, ten specimens were sectioned in a mesiodistal direction. One dental section was used for light microscope analysis, in which both the resin tag length and hybrid layer thickness were measured, while the other section was analyzed using a microtensile test (0.5 mm/min). The fractured surface of the latter section was characterized using a stereoscopic magnifying glass (40x magnifcation). The results were subject to statistical analysis using the Pearson Correlation Test (a = 0.05). The hybrid layer thickness, resin tag length and resin bond strength mean values were 2.19 microm (0.34), 4.34 microm (0.28) and 9.73 MPa (5,55), respectively. In addition, correlation tests between the resin tag length and the resin bond strength (r=0.014) and also between the hybrid layer thickness and bond strength (r=0.43), showed no statistically significant correlation. The microtensile bond strength of Adper Prompt L Pop self-etching adhesive system does not depend on hybrid layer thickness or resin tag length.
authors.affiliation: Department of Restorative Dentistry, Araçatuba Dental School, São Paulo State University, Araçatuba, São Paulo, Brazil. vanessarahal@hotmail.com
authors.forename: Vanessa
authors.initials: V
authors.lastname: Rahal
authors.forename: Fernanda G
authors.initials: FG
authors.lastname: de Oliveira
authors.forename: André L F
authors.initials: AL
authors.lastname: Briso
authors.forename: Paulo H
authors.initials: PH
authors.lastname: dos Santos
authors.forename: Maria L M M
authors.initials: ML
authors.lastname: Sundefeld
authors.forename: Renato H
authors.initials: RH
authors.lastname: Sundfeld
mesh_terms: D001840:Dental Bonding; D003738:Dental Cements; D045662:Dental Etching; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing; D012117:Resins, Synthetic; D013499:Surface Properties; D013718:Tensile Strength
chemical_list: D003738:Dental Cements; D012117:Resins, Synthetic