title: Apical adaptation, sealing ability and push-out bond strength of five root-end filling materials.
abstract: This study compared the fluid filtration, adaptation to the root canal walls, and the push-out bond strength of two resin-based sealers and three calcium silicate-based retrograde filling materials. Fifty maxillary canines were shaped using manual instruments and the apical portion was sectioned. Retrograde cavities of 3-mm depth were prepared. The specimens were divided into five groups (n = 10): Sealer 26 (S26); MBPc (experimental); MTA; Portland cement with 20% zirconium oxide (PC/ZO), and Portland cement with 20% calcium tungstate (PC/CT). The fluid filtration was measured at 7 and 15 days. To evaluate the interfacial adaptation, sections of the teeth, 1 and 2 mm from the apex, were prepared and the percentage of gaps was calculated. The push-out bond strength at 2 mm from the apex was evaluated. Statistical analysis was performed using the ANOVA/Tukey's test (p < 0.05). At 7 and 15 days (p = 0.0048, p = 0.006), the PC/CT group showed higher fluid filtration values when compared to other groups. At 1 mm from the apex, no statistical differences in the adaptation were found among the cements (p = 0.44). At 2 mm from the apex, the PC/ZO group presented statistically lower percentage of gaps than S26, MBPc, and MTA (p = 0.0007). The MBPc group showed higher push-out bond strength than other cements evaluated (p = 0.0008). The fluid filtration and interfacial adaptation of the calcium silicate-based cements were similar to those of the resin-based cements. The resinous cement MBPc showed superior push-out bond strength.
authors.affiliation: Operative Dentistry, Endodontics and Dental Materials, School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil.
authors.forename: Pablo Andrés
authors.initials: PA
authors.lastname: Amoroso-Silva
authors.affiliation: Operative Dentistry, Endodontics and Dental Materials, School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil.
authors.forename: Marina Angélica
authors.initials: MA
authors.lastname: Marciano
authors.affiliation: Operative Dentistry, Endodontics and Dental Materials, School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil.
authors.forename: Bruno Martini
authors.initials: BM
authors.lastname: Guimarães
authors.affiliation: Operative Dentistry, Endodontics and Dental Materials, School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil.
authors.forename: Marco Antonio Hungaro
authors.initials: MA
authors.lastname: Duarte
authors.affiliation: Operative Dentistry, Endodontics and Dental Materials, School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil.
authors.forename: Ana Flavia
authors.initials: AF
authors.lastname: Sanson
authors.affiliation: Operative Dentistry, Endodontics and Dental Materials, School of Dentistry, Universidade de São Paulo, Bauru, SP, Brazil.
authors.forename: Ivaldo Gomes de
authors.initials: IG
authors.lastname: Moraes
mesh_terms: D017607:Aluminum Compounds / Q000737:chemistry; D000704:Analysis of Variance; D001729:Bismuth / Q000737:chemistry; D017610:Calcium Compounds / Q000737:chemistry; D002126:Calcium Hydroxide / Q000737:chemistry; D001840:Dental Bonding / Q000379:methods*; D003763:Dental Leakage / Q000517:prevention & control; D018772:Dental Marginal Adaptation; D004338:Drug Combinations; D006801:Humans; D008422:Materials Testing; D010087:Oxides / Q000737:chemistry; D015203:Reproducibility of Results; D019279:Resin Cements / Q000737:chemistry; D012184:Retrograde Obturation / Q000295:instrumentation / Q000379:methods*; D012387:Root Canal Filling Materials / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry; D013997:Time Factors; D017973:Tungsten Compounds / Q000737:chemistry; D015040:Zirconium / Q000737:chemistry
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D004338:Drug Combinations; D010087:Oxides; D019279:Resin Cements; D012387:Root Canal Filling Materials; C080620:Sealer 26; D017640:Silicates; D017973:Tungsten Compounds; C086631:mineral trioxide aggregate; C018858:calcium tungstate; D015040:Zirconium; D002126:Calcium Hydroxide; C028541:zirconium oxide; D001729:Bismuth