Resistance of a 4-META-containing, methacrylate-based sealer to dislocation in root canals.

Abstract

The dislocation resistance of root fillings created with MetaSEAL, a self-adhesive 4-META-containing methacrylate resin-based sealer, was evaluated. Forty-six incisors were cleaned and shaped using NaOCl and EDTA as irrigants. They were filled with gutta-percha/MetaSEAL or gutta-percha/AH Plus sealer using either a single-cone technique or warm vertical compaction (n = 10). The roots were sectioned at the coronal and middle thirds to obtain thin slices, which were subjected to compressive loading to displace the set sealer/filling toward the coronal side of the slice. The remaining six teeth were filled with gutta-percha/MetaSEAL and cryofractured for scanning electron microscopic examination. The push-out strength of AH Plus was significantly higher than MetaSEAL irrespective of filling techniques (p < 0.05). A minimal hybrid layer was seen in radicular dentin, and resin tags were inconsistently identified from canal walls in the MetaSEAL-filled canals. The lower dislocation resistance in MetaSEAL-filled canals challenges the use of a self-adhesive bonding mechanism to create continuous bonds inside root canals.

• Authors: Matthew S Lawson, Bethany Loushine, Sui Mai, R Norman Weller, David H Pashley, Franklin R Tay, Robert J Loushine
• Journal: Journal of endodontics (J Endod) Vol. 34 Issue 7 Pg. 833-7 (Jul 2008) ISSN: 1878-3554 [Electronic] United States
• PMID: 18570990 (Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Acrylic Resins
• Epoxy Resins
• Methacrylates
• Root Canal Filling Materials
• epoxy resin-based root canal sealer
• 4-META resin

Topics

• Acrylic Resins
• Dental Bonding
• Dental Stress Analysis
• Epoxy Resins
• Humans
• Incisor
• Methacrylates
• Microscopy, Electron, Scanning
• Retreatment
• Root Canal Filling Materials
• Root Canal Obturation (methods)
• Statistics, Nonparametric