Abstract
The aim of this study was to evaluate the bond strength of different triccalcium silicate cements to retrograde cavity using a push out test. Thirty maxillary central incisors were shaped using #80 hand files and sectioned transversally. Root slices were obtained from the apical 4 mm after eliminating the apical extremity. The specimens were embedded in acrylic resin and positioned at 45° to the horizontal plane for preparation of root-end cavities with a diamond ultrasonic retrotip. The samples were divided into three groups according to the root-end filling material (n = 10): MTA Angelus, ProRoot MTA and Biodentine. A gutta-percha cone (#80) was tugged-back at the limit between the canal and the root-end cavity. The root-end cavity was filled and the gutta-percha cone was removed after complete setting of the materials. The specimens were placed in an Instron machine with the root-end filling turned downwards. The push-out shaft was inserted in the space previously occupied by the gutta-percha cone and push out testing was performed at a crosshead speed of 1.0 mm/min. There was no statistically significant difference in resistance to push out by the materials tested (p > 0.01). MTA Angelus and ProRoot MTA showed predominantly mixed failure while Biodentine exhibited mixed and cohesive failures. The tricalcium silicate-based root-end filling materials showed similar bond strength retrograde cavity.
Original language | English |
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Article number | e18 |
Journal | Pesquisa odontologica brasileira = Brazilian oral research |
Volume | 32 |
DOIs | |
Publication status | Published - 8 Mar 2018 |
Keywords
- Analysis of Variance
- Bismuth/chemistry
- Calcium Compounds/chemistry
- Dental Bonding/methods
- Dental Pulp Cavity/drug effects
- Dental Restoration Failure
- Dentin/drug effects
- Gutta-Percha/chemistry
- Humans
- Materials Testing
- Oxides/chemistry
- Reproducibility of Results
- Root Canal Filling Materials/chemistry
- Silicates/chemistry
- Surface Properties/drug effects
- Tooth Root/drug effects