title: Effect of surface treatment of fiberglass posts on bond strength to root dentin.
abstract: This study evaluated the influence of the surface treatments of fiberglass posts on bond strength to root dentin using push-out test. Forty bovine incisor roots were endodontically treated. The surface of the fiberglass posts (Exacto #2, Angelus) were treated using 4 different protocols (n=10): Control - 70% ethanol for 1 min; 37% phosphoric acid for 1 min; 10% hydrofluoric acid for 1 min; and 24% hydrogen peroxide for 1 min. After a silane coupling agent was applied for 1 min and all posts were cemented using self-adhesive resin cement (RelyX Unicem, 3M-ESPE). The roots were sectioned and two 1-mm-thick slices were obtained from each third: cervical, middle and apical. The specimens were subjected to the push-out test with a crosshead speed of 0.5 mm/min. Data were analyzed by repeated measures ANOVA followed by Tukey's HSD tests (=0.05). The surface treatment (p<0.001) and root third region (p=0.007) factors were significant. The retention to root canal was affected by surface treatment type. The post surface treatment with 24% hydrogen peroxide for 1 min yielded significantly higher bond strength when the fiberglass posts were cemented with RelyX Unicem.
authors.affiliation: Department of Operative Dentistry and Dental Materials, School of Dentistry, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil.
authors.forename: Andréa Dolores Correia Miranda
authors.initials: AD
authors.lastname: Valdivia
authors.affiliation: Department of Operative Dentistry and Dental Materials, School of Dentistry, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil.
authors.forename: Veridiana Resende
authors.initials: VR
authors.lastname: Novais
authors.affiliation: Department of Operative Dentistry and Dental Materials, School of Dentistry, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil.
authors.forename: Murilo de Sousa
authors.initials: Mde S
authors.lastname: Menezes
authors.affiliation: Department of Operative Dentistry and Dental Materials, School of Dentistry, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil.
authors.forename: Marina Guimarães
authors.initials: MG
authors.lastname: Roscoe
authors.affiliation: Department of Endodontics, School of Dentistry, UFG - Federal University of Goiás, Goiânia, GO, Brazil.
authors.forename: Carlos
authors.initials: C
authors.lastname: Estrela
authors.affiliation: Department of Operative Dentistry and Dental Materials, School of Dentistry, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil.
authors.forename: Carlos José
authors.initials: CJ
authors.lastname: Soares
mesh_terms: D003804:Dentin; D005898:Glass; D018613:Microscopy, Confocal; D011176:Post and Core Technique; D013499:Surface Properties; D014092:Tooth Root
chemical_list: C009753:fiberglass