Is An Oxygen Inhibited Layer Required for Bonding of Resin-Coated Gutta-Percha to a Methacrylate-Based Root Canal Sealer?

Noriko Hiraishi, Robert J. Loushine, Michele Vano, Nicoletta Chieffi, R. Norman Weller, Marco Ferrari, David Henry Pashley, Franklin Chi Meng Tay

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Removal of the oxygen inhibition layer from the surface of resin-coated gutta-percha cones during packaging has been hypothesized for their weak adhesion to a methacrylate-based root canal sealer, resulting in their frequent delamination from the sealer after root canal obturation. This study examined the feasibility of creating oxygen inhibition layers on resin-coated gutta-percha cones via the adjunctive application of a dual-cured dentin adhesive just before bonding. Composite cylinders were bonded with EndoREZ to flat, resin-coated gutta-percha disks and similar disks that were post-treated with Prime&Bond NT Dual Cure adhesive and stressed to failure using a modified microshear testing design. Although shear strengths for both groups were relatively low, a 5-fold increase in shear strength was observed after adhesive application, with complex interfacial failures instead of complete sealer delamination from the resin-coating. In-situ dentin adhesive application appears to have merits in enhancing the coupling of resin-coated gutta-percha to methacrylate sealers.

Original languageEnglish (US)
Pages (from-to)429-433
Number of pages5
JournalJournal of Endodontics
Volume32
Issue number5
DOIs
StatePublished - May 1 2006

Fingerprint

Gutta-Percha
Methacrylates
Dental Pulp Cavity
Adhesives
Oxygen
Shear Strength
Dentin
Root Canal Obturation
Feasibility Studies
Product Packaging
canals sealer

Keywords

  • FE-SEM
  • methacrylate sealer
  • microshear bond testing
  • oxygen inhibition layer
  • polybutadiene-diisocyanate-methacrylate
  • resin-coated gutta-percha

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Is An Oxygen Inhibited Layer Required for Bonding of Resin-Coated Gutta-Percha to a Methacrylate-Based Root Canal Sealer? / Hiraishi, Noriko; Loushine, Robert J.; Vano, Michele; Chieffi, Nicoletta; Weller, R. Norman; Ferrari, Marco; Pashley, David Henry; Tay, Franklin Chi Meng.

In: Journal of Endodontics, Vol. 32, No. 5, 01.05.2006, p. 429-433.

Research output: Contribution to journalArticle

Hiraishi, Noriko ; Loushine, Robert J. ; Vano, Michele ; Chieffi, Nicoletta ; Weller, R. Norman ; Ferrari, Marco ; Pashley, David Henry ; Tay, Franklin Chi Meng. / Is An Oxygen Inhibited Layer Required for Bonding of Resin-Coated Gutta-Percha to a Methacrylate-Based Root Canal Sealer?. In: Journal of Endodontics. 2006 ; Vol. 32, No. 5. pp. 429-433.
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