Resistance of a 4-META–Containing, Methacrylate-based Sealer to Dislocation in Root Canals
| Autor: | Bethany A. Loushine, Robert J. Loushine, Sui Mai, Franklin R. Tay, R. Norman Weller, David H. Pashley, Matthew S. Lawson |
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| Rok vydání: | 2008 |
| Předmět: |
Dental Stress Analysis
Materials science Epoxy Resins Scanning electron microscope business.industry Acrylic Resins Dental Bonding Dentistry Methacrylate Statistics Nonparametric Incisor Root Canal Filling Materials Compressive load Root Canal Obturation Retreatment Microscopy Electron Scanning Humans Methacrylates Dislocation business General Dentistry |
| Zdroj: | Journal of Endodontics. 34:833-837 |
| ISSN: | 0099-2399 |
| DOI: | 10.1016/j.joen.2008.03.028 |
| Popis: | 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 (p0.05). 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. |
| Databáze: | OpenAIRE |
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