Push-out bond strength of different tricalcium silicate-based filling materials to root dentin

• Main Authors: Jorge Henrique Stefaneli Marques, Yara Teresinha Corrêa Silva-Sousa, Fuad Jacob Abi Rached-Júnior, Luciana Martins Domingues de Macedo, Jardel Francisco Mazzi-Chaves, Josette Camilleri, Manoel Damião Sousa-Neto
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Pesquisa Odontológica 2018-03-01
• Series: Brazilian Oral Research
• Subjects: Endodontics; Biocompatible Materials; Dental Materials
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242018000100215&lng=en&tlng=en

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.