Advertisement

Bonding of Self-adhesive (Self-etching) Root Canal Sealers to Radicular Dentin

      Abstract

      The latest generation of methacrylate resin–based sealers has eliminated the use of separate self-etching primers by incorporating acidic resin monomers in the sealers to render them self-adhesive to dentin. This study examined the adhesive strengths, interfacial ultrastructure, and tracer penetration of a nonetching (EndoREZ; Ultradent, South Jordan, UT) and two self-adhesive methacrylate resin–based sealers (MetaSEAL; Parkell, Farmington, NY, and RealSeal SE; SybronEndo, Orange, CA) when they were applied to radicular dentin following the manufacturers' recommended use of EDTA as the active final rinse. A modified push-out testing design was used to evaluate the dislodgement of core-free sealers. The mixed sealers were placed in dimensionally identical, artificially created canal spaces prepared in the coronal, middle, and apical thirds of radicular dentin. After setting, each sealer-filled cavity was subjected to compressive loading until failure. Additional specimens were prepared for transmission electron microscopy to examine the ultrastructure and nanoleakage within the sealer-radicular dentin interface. The two self-adhesive sealers MetaSEAL and RealSeal SE exhibited higher push-out strengths than the nonetching sealer EndoREZ when EDTA was used as the active final rinse. All three sealers showed a 1- to 1.5-μm thick zone of partially demineralized dentin, with the EDTA dentin demineralization effect masking the true self-etching potential of MetaSEAL and RealSeal SE. The true self-etching potential of self-adhesive sealers is a clinically important attribute that should be further investigated. Incomplete smear layer removal from the apical third of instrumented canal walls may jeopardize the performance of self-adhesive sealers should they fail to self-etch without the adjunctive use of calcium chelating irrigants.

      Key Words

      To read this article in full you will need to make a payment

      Purchase one-time access:

      Academic & Personal: 24 hour online accessCorporate R&D Professionals: 24 hour online access
      One-time access price info
      • For academic or personal research use, select 'Academic and Personal'
      • For corporate R&D use, select 'Corporate R&D Professionals'

      Subscribe:

      Subscribe to Journal of Endodontics
      Already a print subscriber? Claim online access
      Already an online subscriber? Sign in
      Institutional Access: Sign in to ScienceDirect

      References

        • Schwartz R.S.
        Adhesive dentistry and endodontics. Part 2: bonding in the root canal system-the promise and the problems: a review.
        J Endod. 2006; 32: 1125-1134
        • Eldeniz A.U.
        • Erdemir A.
        • Belli S.
        Shear bond strength of three resin based sealers to dentin with and without the smear layer.
        J Endod. 2005; 31: 293-296
        • Hammad M.
        • Qualtrough A.
        • Silikas N.
        Extended setting shrinkage behavior of endodontic sealers.
        J Endod. 2008; 34: 90-93
        • Zmener O.
        • Pameijer C.H.
        • Serrano S.A.
        • et al.
        Significance of moist root canal dentin with the use of methacrylate-based endodontic sealers: an in vitro coronal dye leakage study.
        J Endod. 2008; 34: 76-79
        • Tay F.R.
        • Loushine R.J.
        • Monticelli F.
        • et al.
        Effectiveness of resin-coated gutta-percha cones and a dual-cured, hydrophilic methacrylate resin-based sealer in obturating root canals.
        J Endod. 2005; 31: 659-664
        • Bergmans L.
        • Moisiadis P.
        • De Munck J.
        • et al.
        Effect of polymerization shrinkage on the sealing capacity of resin fillers for endodontic use.
        J Adhes Dent. 2005; 7: 321-329
        • Perdigão J.
        • Lopes M.M.
        • Gomes G.
        Interfacial adaptation of adhesive materials to root canal dentin.
        J Endod. 2007; 33: 259-263
        • De-Deus G.
        • Namen F.
        • Galan Jr, J.
        Reduced long-term sealing ability of adhesive root fillings after water-storage stress.
        J Endod. 2008; 34: 322-325
        • Cotton T.P.
        • Schindler W.G.
        • Schwartz S.A.
        • et al.
        A retrospective study comparing clinical outcomes after obturation with Resilon/Epiphany or Gutta-Percha/Kerr sealer.
        J Endod. 2008; 34: 789-797
        • Salz U.
        • Zimmermann J.
        • Salzer T.
        Self-curing, self-etching adhesive cement systems.
        J Adhes Dent. 2005; 7: 7-17
        • Al-Assaf K.
        • Chakmakchi M.
        • Palaghias G.
        • et al.
        Interfacial characteristics of adhesive luting resins and composites with dentine.
        Dent Mater. 2007; 23: 829-839
        • Watanabe I.
        • Nakabayashi N.
        • Pashley D.H.
        Bonding to ground dentin by a phenyl-P self-etching primer.
        J Dent Res. 1994; 73: 1212-1220
        • Tay F.R.
        • Pashley D.H.
        Aggressiveness of contemporary self-etching systems. I: depth of penetration beyond dentin smear layers.
        Dent Mater. 2001; 17: 296-308
        • Pinna L.
        • Brackett M.G.
        • Lockwood P.E.
        • et al.
        In vitro cytotoxicity evaluation of a self-adhesive, methacrylate resin-based root canal sealer.
        J Endod. 2008; 34: 1085-1088
        • Belli S.
        • Ozcan E.
        • Derinbayi O.
        • et al.
        A comparative evaluation of sealing ability of a new, self-etching, dual-curable sealer: Hybrid Root SEAL (MetaSEAL).
        Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2008; 106: e45-e52
        • Radovic I.
        • Monticelli F.
        • Goracci C.
        • et al.
        Self-adhesive resin cements: a literature review.
        J Adhes Dent. 2008; 10: 251-258
        • Monticelli F.
        • Osorio R.
        • Mazzitelli C.
        • et al.
        Limited decalcification/diffusion of self-adhesive cements into dentin.
        J Dent Res. 2008; 87: 974-979
        • Peumans M.
        • Hikita K.
        • De Munck J.
        • et al.
        Bond durability of composite luting agents to ceramic when exposed to long-term thermocycling.
        Oper Dent. 2007; 32: 372-379
        • Frankenberger R.
        • Lohbauer U.
        • Schaible R.B.
        • et al.
        Luting of ceramic inlays in vitro: marginal quality of self-etch and etch-and-rinse adhesives versus self-etch cements.
        Dent Mater. 2008; 24: 185-191
        • Mazzitelli C.
        • Monticelli F.
        • Osorio R.
        • et al.
        Effect of simulated pulpal pressure on self-adhesive cements bonding to dentin.
        Dent Mater. 2008; 24: 1156-1163
        • Tay F.R.
        • Gutmann J.L.
        • Pashley D.H.
        Microporous, demineralized collagen matrices in intact radicular dentin created by commonly used calcium-depleting endodontic irrigants.
        J Endod. 2007; 33: 1086-1090
        • Huffman B.P.
        • Mai S.
        • Pinna L.
        • et al.
        Dislocation resistance of ProRoot Endo Sealer, a calcium silicate-based root canal sealer from radicular dentine.
        Int Endod J. 2009; 42: 34-46
        • Tatsuta C.T.
        • Morgan L.A.
        • Baumgartner J.C.
        • et al.
        Effect of calcium hydroxide and four irrigation regimens on instrumented and uninstrumented canal wall topography.
        J Endod. 1999; 25: 93-98
        • Jainaen A.
        • Palamara J.E.
        • Messer H.H.
        Push-out bond strengths of the dentine-sealer interface with and without a main cone.
        Int Endod J. 2007; 40: 882-890
        • Kallas M.N.
        • Koss D.A.
        • Hahn H.T.
        • et al.
        Interfacial stress state present in a “thin-slice” fibre push-out test.
        J Mater Sci. 1992; 27: 3821-3826
        • Chandra N.
        • Ghonem H.
        Interfacial mechanics of push-out tests: theory and experiments.
        Compos Part A Appl Sci Manuf. 2001; 32: 578-584
        • Tay F.R.
        • Moulding K.M.
        • Pashley D.H.
        Distribution of nanofillers from a simplified-step adhesive in acid-conditioned dentin.
        J Adhes Dent. 1999; 1: 103-117
        • Tay F.R.
        • Pashley D.H.
        • Yoshiyama M.
        Two modes of nanoleakage expression in single-step adhesives.
        J Dent Res. 2002; 81: 472-476
        • Williams C.
        • Loushine R.J.
        • Weller R.N.
        • et al.
        A comparison of cohesive strength and stiffness of Resilon and gutta-percha.
        J Endod. 2006; 32: 553-555
        • Gesi A.
        • Raffaelli O.
        • Goracci C.
        • et al.
        Interfacial strength of Resilon and gutta-percha to intraradicular dentin.
        J Endod. 2005; 31: 809-813
        • Peters O.A.
        Current challenges and concepts in the preparation of root canal systems: a review.
        J Endod. 2004; 30: 559-567
        • Morris M.D.
        • Lee K.W.
        • Agee K.A.
        • et al.
        Effects of sodium hypochlorite and RC-prep on bond strengths of resin cement to endodontic surfaces.
        J Endod. 2001; 27: 753-757
        • García-Godoy F.
        • Loushine R.J.
        • Itthagarun A.
        • et al.
        Application of biologically-oriented dentin bonding principles to the use of endodontic irrigants.
        Am J Dent. 2005; 18: 281-290
        • Carvalho A.S.
        • Camargo C.H.
        • Valera M.C.
        • et al.
        Smear layer removal by auxiliary chemical substances in biomechanical preparation: a scanning electron microscope study.
        J Endod. 2008; 34: 1396-1400
        • Khedmat S.
        • Shokouhinejad N.
        Comparison of the efficacy of three chelating agents in smear layer removal.
        J Endod. 2008; 34: 599-602