title: The Effect of Self-adhesive and Self-etching Resin Cements on the Bond Strength of Nonmetallic Posts in Different Root Thirds.
abstract: The purpose of this study was to evaluate the effect of self-adhesive and self-etching resin cements on the bond strength of nonmetallic posts in different root regions.
  
  
  
  Sixty single-rooted human teeth were decoronated, endodontically treated, post-space prepared, and divided into six groups. Glass-fiber (GF) posts (Exacto, Angelus) and fiber-reinforced composite (FRC) posts (EverStick, StickTeck) were cemented with self-adhesive resin cement (Breeze) (SA) (Pentral Clinical) and self-etching resin cement (Panavia-F) (SE) (Kuraray). Six 1-mm-thick rods were obtained from the cervical (C), middle (M), and apical (A) regions of the roots. The specimens were then subjected to microtensile testing in a special machine (BISCO; Schaumburg, IL, USA) at a crosshead speed of 0.5 mm/min. Microtensile bond strength data were analyzed with two-way ANOVA and Tukey's tests.
  
  
  
  Means (and SD) of the MPa were: GF/SA/C: 14.32 (2.84), GF/SA/M: 10.69 (2.72), GF/SA/A: 6.77 (2.17), GF/SE/C: 11.56 (4.13), GF/SE/M: 6.49 (2.54), GF/SE/A: 3.60 (1.29), FRC/SA/C: 16.89 (2.66), FRC/SA/M: 13.18 (2.19), FRC/SA/A: 8.45 (1.77), FRC/SE/C: 13.69 (3.26), FRC/SE/M: 9.58 (2.23), FRC/SE/A: 5.62 (2.12). The difference among the regions was statistically significant for all groups (p < 0.05). The self-adhesive resin cement showed better results than the self-etching resin cement when compared to each post (p < 0.05). No statistically significant differences in bond strengths of the resin cements when comparable to each post (p > 0.05).
  
  
  
  The bond strength values were significantly affected by the resin cement and the highest values were found for self-adhesive resin cement.
authors.affiliation: Department of Dentistry, CEUMA University, São Luis, Maranhao, Brazil.
authors.forename: Monica Barros
authors.initials: MB
authors.lastname: da Silva
authors.affiliation: Department of Dentistry, CEUMA University, São Luis, Maranhao, Brazil.
authors.forename: Rudys Rodolfo de Jesus
authors.initials: RR
authors.lastname: Tavarez
authors.affiliation: Department of Postgraduate Program in Integrated Dental Sciences, University of Cuiabá, Mato Grosso, Cuiabá
authors.forename: Fernanda Silva
authors.initials: FS
authors.lastname: de Assis
authors.affiliation: Department of Postgraduate Program in Integrated Dental Sciences, University of Cuiabá, Mato Grosso, Cuiabá
authors.forename: Mateus Rodrigues
authors.initials: MR
authors.lastname: Tonetto
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, UNESP - São Paulo State University, Araraquara, São Pãulo, Brazil.
authors.forename: Thiago Porto
authors.initials: TP
authors.lastname: Neto
authors.affiliation: Department of Conservative Dentistry and Endodontics, MS Ramaiah Dental College and Hospital, Bengaluru, Karnataka, India.
authors.forename: Shilpa H
authors.initials: SH
authors.lastname: Bhandi
authors.affiliation: Department of Restorative Dentistry, University of Toronto, Toronto, Canada.
authors.forename: Omar
authors.initials: O
authors.lastname: El-Mowafy
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, UNESP - São Paulo State University, Araraquara, São Pãulo, Brazil.
authors.forename: Sizenando de Toledo
authors.initials: Sde T
authors.lastname: Porto Neto
authors.affiliation: Head Postgraduate Program in Dentistry, Department of Dentistry, CEUMA University, Rua Josue Montello, N 01, Renascença, São Luis, Maranhão 84035-210, Brazil, e-mail: mbandeca@gmail.com.
authors.forename: Matheus Coelho
authors.initials: MC
authors.lastname: Bandeca
mesh_terms: D002484:Cementation / Q000379:methods; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding / Q000379:methods*; D003764:Dental Materials / Q000737:chemistry; D003786:Dental Pulp Cavity / Q000648:ultrastructure*; D003799:Dental Stress Analysis / Q000295:instrumentation; D005898:Glass / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D011176:Post and Core Technique / Q000295:instrumentation*; D011897:Random Allocation; D019279:Resin Cements / Q000737:chemistry*; D018915:Root Canal Preparation / Q000379:methods; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength; D019227:Tooth Apex / Q000648:ultrastructure; D019237:Tooth Cervix / Q000648:ultrastructure; D019553:Tooth, Nonvital / Q000473:pathology
chemical_list: D003188:Composite Resins; D003764:Dental Materials; C438843:Panavia-Fluoro; D019279:Resin Cements; C584659:breeze cement; C496140:everStick; C009753:fiberglass
keywords: Post; Resin cement; Bond strength.