title: Comparison of the apical seal obtained by a dual-cure resin based cement or an epoxy resin sealer with or without the use of an acidic primer.
abstract: This study compared the apical leakage of roots obturated with gutta-percha using either a dual-cure resin based cement (Panavia F) or an epoxy-resin sealer (Thermaseal plus) with or without the application of an acidic primer (ED Primer). Eighty-six single rooted canine teeth were decoronated, cleaned, and shaped by using hand and rotary instruments, randomly divided into four groups, and obturated as follows: group A (n = 20): ED Primer applied followed by thermoplastized obturation with gutta-percha and Thermaseal Plus sealer; group B (n = 20): thermoplastized obturation with gutta-percha and Thermaseal Plus; group C (n = 20): ED primer applied followed by thermoplastized obturation with gutta-percha and Panavia F; group D (n = 20): thermoplastized obturation with gutta-percha and Panavia F. Both a negative control (n = 3; entire root coated with wax) and a positive control (n = 3; obturated with only a fitted master cone) were included in the study. Groups A, B, C, D, and the controls were immersed in molten sticky wax, leaving the apical 2-mm exposed, and quickly chilled. All teeth were immersed in 1% methylene blue dye solution for 10 days, rinsed, and sectioned longitudinally. Apical dye penetration was measured stereomicroscopically at 10-fold magnification. The analysis of variance and Duncan Multiple Range were used for result analysis. The specimens obturated with gutta-percha and an epoxy-resin sealer (with or without an acidic primer) demonstrated significantly less linear dye penetration than specimens obturated with gutta-percha and the dual-cure, resin-based cement (with or without an acidic primer).
authors.affiliation: Department of Endodontics, College of Dentistry, University of Florida, Gainesville 32610-0436, USA.
authors.forename: Leandro R
authors.initials: LR
authors.lastname: Britto
authors.forename: Robert E
authors.initials: RE
authors.lastname: Borer
authors.forename: Frank J
authors.initials: FJ
authors.lastname: Vertucci
authors.forename: James E
authors.initials: JE
authors.lastname: Haddix
authors.forename: Valeria V
authors.initials: VV
authors.lastname: Gordan
mesh_terms: D000704:Analysis of Variance; D004396:Coloring Agents; D003481:Cuspid; D001840:Dental Bonding; D003763:Dental Leakage / Q000145:classification / Q000473:pathology; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D004853:Epoxy Resins / Q000737:chemistry*; D006171:Gutta-Percha / Q000737:chemistry; D006358:Hot Temperature; D006801:Humans; D008751:Methylene Blue; D019279:Resin Cements / Q000737:chemistry*; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012389:Root Canal Obturation; D018915:Root Canal Preparation / Q000295:instrumentation; D013223:Statistics as Topic; D013499:Surface Properties; D019227:Tooth Apex / Q000648:ultrastructure
chemical_list: D004396:Coloring Agents; D017220:Dentin-Bonding Agents; D004853:Epoxy Resins; C438843:Panavia-Fluoro; D019279:Resin Cements; D012387:Root Canal Filling Materials; C089258:Thermaseal Silverfree; D006171:Gutta-Percha; D008751:Methylene Blue