New Methodology to Evaluate Bond Strength of Root-End Filling Materials
This study evaluated the bond strength of root-end filling materials to root-end cavities using a new methodology. Twenty maxillary central incisors were subjected to biomechanical preparation (#80 hand file) and sectioned transversally 2 mm short of the apex and 4 mm coronally to this point. The root cylinders were embedded in acrylic resin and positioned at 45° to the horizontal plane for preparation of root-end cavities with a diamond ultrasonic retrotip. Two groups (n=10) were formed according to the root-end filling material: MTA and Super EBA. A gutta-percha cone (#80) was tug-backed at the limit between the canal and the root-end cavity. The cavity was filled and the gutta-percha cone was removed after complete setting of the sealer. 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 run at a crosshead speed of 1.0 mm/min for pushing out the root-end filling material. Data were analyzed by ANOVA (α=5%). Super EBA (6.03±1.31) presented higher bond strength (MPa) than MTA (1.81±0.45) (p>0.05). There was a predominance of cohesive failures for Super EBA and mixed for MTA. The protocol of specimen preparation is effective and introduces a specific methodology for assessing bond strength of root-end filling materials to dentin. Among the materials, Super EBA presented the highest bond strength.
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Fundação Odontológica de Ribeirão Preto
2015
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oai:scielo:S0103-644020150003002882015-07-14New Methodology to Evaluate Bond Strength of Root-End Filling MaterialsMarques,Jorge Henrique StefaneliSilva-Sousa,Yara Teresinha CorrêaRached-Júnior,Fuad Jacob AbiMazzi-Chaves,Jardel FranciscoMiranda,Carlos Eduardo SaraivaSilva,Silvio Rocha Correa daSteier,LiviuSousa-Neto,Manoel Damião endodontics root-end filling materials bond strength push-out This study evaluated the bond strength of root-end filling materials to root-end cavities using a new methodology. Twenty maxillary central incisors were subjected to biomechanical preparation (#80 hand file) and sectioned transversally 2 mm short of the apex and 4 mm coronally to this point. The root cylinders were embedded in acrylic resin and positioned at 45° to the horizontal plane for preparation of root-end cavities with a diamond ultrasonic retrotip. Two groups (n=10) were formed according to the root-end filling material: MTA and Super EBA. A gutta-percha cone (#80) was tug-backed at the limit between the canal and the root-end cavity. The cavity was filled and the gutta-percha cone was removed after complete setting of the sealer. 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 run at a crosshead speed of 1.0 mm/min for pushing out the root-end filling material. Data were analyzed by ANOVA (α=5%). Super EBA (6.03±1.31) presented higher bond strength (MPa) than MTA (1.81±0.45) (p>0.05). There was a predominance of cohesive failures for Super EBA and mixed for MTA. The protocol of specimen preparation is effective and introduces a specific methodology for assessing bond strength of root-end filling materials to dentin. Among the materials, Super EBA presented the highest bond strength.info:eu-repo/semantics/openAccessFundação Odontológica de Ribeirão PretoBrazilian Dental Journal v.26 n.3 20152015-06-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402015000300288en10.1590/0103-6440201300189 |
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Marques,Jorge Henrique Stefaneli Silva-Sousa,Yara Teresinha Corrêa Rached-Júnior,Fuad Jacob Abi Mazzi-Chaves,Jardel Francisco Miranda,Carlos Eduardo Saraiva Silva,Silvio Rocha Correa da Steier,Liviu Sousa-Neto,Manoel Damião |
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Marques,Jorge Henrique Stefaneli Silva-Sousa,Yara Teresinha Corrêa Rached-Júnior,Fuad Jacob Abi Mazzi-Chaves,Jardel Francisco Miranda,Carlos Eduardo Saraiva Silva,Silvio Rocha Correa da Steier,Liviu Sousa-Neto,Manoel Damião New Methodology to Evaluate Bond Strength of Root-End Filling Materials |
author_facet |
Marques,Jorge Henrique Stefaneli Silva-Sousa,Yara Teresinha Corrêa Rached-Júnior,Fuad Jacob Abi Mazzi-Chaves,Jardel Francisco Miranda,Carlos Eduardo Saraiva Silva,Silvio Rocha Correa da Steier,Liviu Sousa-Neto,Manoel Damião |
author_sort |
Marques,Jorge Henrique Stefaneli |
title |
New Methodology to Evaluate Bond Strength of Root-End Filling Materials |
title_short |
New Methodology to Evaluate Bond Strength of Root-End Filling Materials |
title_full |
New Methodology to Evaluate Bond Strength of Root-End Filling Materials |
title_fullStr |
New Methodology to Evaluate Bond Strength of Root-End Filling Materials |
title_full_unstemmed |
New Methodology to Evaluate Bond Strength of Root-End Filling Materials |
title_sort |
new methodology to evaluate bond strength of root-end filling materials |
description |
This study evaluated the bond strength of root-end filling materials to root-end cavities using a new methodology. Twenty maxillary central incisors were subjected to biomechanical preparation (#80 hand file) and sectioned transversally 2 mm short of the apex and 4 mm coronally to this point. The root cylinders were embedded in acrylic resin and positioned at 45° to the horizontal plane for preparation of root-end cavities with a diamond ultrasonic retrotip. Two groups (n=10) were formed according to the root-end filling material: MTA and Super EBA. A gutta-percha cone (#80) was tug-backed at the limit between the canal and the root-end cavity. The cavity was filled and the gutta-percha cone was removed after complete setting of the sealer. 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 run at a crosshead speed of 1.0 mm/min for pushing out the root-end filling material. Data were analyzed by ANOVA (α=5%). Super EBA (6.03±1.31) presented higher bond strength (MPa) than MTA (1.81±0.45) (p>0.05). There was a predominance of cohesive failures for Super EBA and mixed for MTA. The protocol of specimen preparation is effective and introduces a specific methodology for assessing bond strength of root-end filling materials to dentin. Among the materials, Super EBA presented the highest bond strength. |
publisher |
Fundação Odontológica de Ribeirão Preto |
publishDate |
2015 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402015000300288 |
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