Push-out bond strength of two root-end filling materials in root-end cavities prepared by Er,Cr:YSGG laser or ultrasonic technique

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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Push-out Bond Strength of Root-end Filling Materials

Brazilian Dental Journal ◽

10.1590/0103-6440201600340 ◽

2016 ◽

Vol 27 (3) ◽

pp. 332-335 ◽

Cited By ~ 6

Author(s):

Rodrigo Ricci Vivan ◽

Juliane Maria Guerreiro-Tanomaru ◽

Roberta Bosso-Martelo ◽

Bernardo Cesar Costa ◽

Marco Antonio Hungaro Duarte ◽

...

Keyword(s):

Zinc Oxide ◽

Bond Strength ◽

Mechanical Test ◽

Test Machine ◽

Adhesive Failure ◽

Root Canal Preparation ◽

Significance Level ◽

Tukey Test ◽

Filling Materials ◽

Push Out

Abstract The aim of this study was to evaluate the bond strength of root-end filling materials. Forty 2-mm-thick slices were obtained from human single-rooted teeth. After root canal preparation using a 1.5 mm diameter cylindrical drill, the dentinal walls were prepared by diamond ultrasonic tip (CVD T0F-2). The specimens were divided according the material (n=10): MTA Angelus (MTAA), MTA Sealer (MTAS, experimental), Sealer 26 (S26) and zinc oxide and eugenol cement (ZOE). The push-out test was performed in a mechanical test machine (EMIC DL 2000) at 1 mm/min speed. The failure type was evaluated by stereomicroscopy. The results were subjected to ANOVA and Tukey test, at 5% significance level. MTAA (19.18 MPa), MTAS (19.13 MPa) and S26 (15.91 MPa) showed higher bond strength (p<0.05). ZOE (9.50 MPa) showed the least bond strength values (p<0.05). Adhesive failure was prevalent in all groups, except for ZOE, which showed mixed failures. It was concluded that root-end filling materials MTA Angelus, MTA Sealer and Sealer 26 showed higher bond strength to dentinal walls than zinc oxide and eugenol cement after retrograde preparation.

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A Comparative Study to Evaluate the Effect of Ultrasonic Agitation on Push - Out Bond Strength of Three Root-End Filling Materials: An In Vitro Study

Indian Journal of Forensic Medicine & Toxicology ◽

10.37506/ijfmt.v15i1.13653 ◽

2021 ◽

Keyword(s):

Bond Strength ◽

Comparative Study ◽

In Vitro Study ◽

Vitro Study ◽

Ultrasonic Agitation ◽

Filling Materials ◽

Push Out

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Apical adaptation, sealing ability and push-out bond strength of five root-end filling materials

Brazilian Oral Research ◽

10.1590/1807-3107bor-2014.vol28.0043 ◽

2014 ◽

Vol 28 (1) ◽

pp. 1-6 ◽

Cited By ~ 6

Author(s):

Pablo Andrés AMOROSO-SILVA ◽

Marina Angélica MARCIANO ◽

Bruno Martini GUIMARÃES ◽

Marco Antonio Hungaro DUARTE ◽

Ana Flavia SANSON ◽

...

Keyword(s):

Bond Strength ◽

Filling Materials ◽

Sealing Ability ◽

Push Out

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Effect of obturation technique with immediate and delayed post space preparation on apical voids and bond strength of apical gutta-percha

Journal of International Medical Research ◽

10.1177/0300060518814604 ◽

2018 ◽

Vol 47 (1) ◽

pp. 470-480 ◽

Cited By ~ 1

Author(s):

Weilin Long ◽

Jing Li ◽

Yiwen Liu ◽

Hongwei Jiang

Keyword(s):

Bond Strength ◽

Failure Modes ◽

Continuous Wave ◽

Volumetric Analysis ◽

Micro Computed Tomography ◽

Filling Materials ◽

Gutta Percha ◽

Percentage Volume ◽

Post Space ◽

Push Out

Objective The purpose of this study was to evaluate the effect of immediate and delayed post space preparation on the sealing ability of two root canal obturation techniques by using micro-computed tomography imaging and a push-out test. Methods The root canals of 40 human maxillary premolar teeth were instrumented and divided into four groups: (A) single cone (SC) followed by immediate post space preparation, (B) continuous wave of condensation (CWC) followed by immediate post space preparation, (C) SC followed by delayed post space preparation, and (D) CWC followed by delayed post space preparation. Micro-CT scans were performed for volumetric analysis of voids and filling materials in the apical 4-mm portion. A push-out test was performed, and failure modes (adhesive, cohesive, or mixed) were assessed. Data were analyzed using the Kruskal-Wallis test and one-way analysis of variance. Results No significant differences were observed among the four groups in terms of the percentage volume of voids of the apical 4 mm or the bond strength of apical gutta-percha. Conclusions The percentage volume of voids and bond strength of apical gutta-percha were similar and were not significantly influenced by the timing of post space preparation or the obturation technique.

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