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.
journal_name
Braz Oral Resjournal_title
Brazilian oral researchauthors
Stefaneli Marques JH,Silva-Sousa YTC,Rached-Júnior FJA,Macedo LMD,Mazzi-Chaves JF,Camilleri J,Sousa-Neto MDdoi
10.1590/1807-3107bor-2018.vol32.0018subject
Has Abstractpub_date
2018-03-08 00:00:00pages
e18eissn
1806-8324issn
1807-3107pii
S1806-83242018000100215journal_volume
32pub_type
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