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 language | English (US) |
---|---|
Pages (from-to) | 429-433 |
Number of pages | 5 |
Journal | Journal of endodontics |
Volume | 32 |
Issue number | 5 |
DOIs | |
State | Published - May 2006 |
Keywords
- FE-SEM
- methacrylate sealer
- microshear bond testing
- oxygen inhibition layer
- polybutadiene-diisocyanate-methacrylate
- resin-coated gutta-percha
ASJC Scopus subject areas
- General Dentistry