Push-out Bond Strength of Root-end Filling Materials

Vivan, Rodrigo Ricci; Guerreiro-Tanomaru, Juliane Maria; Bosso‐Martelo, Roberta; Costa, Bernardo Cesar; Duarte, Marco Antônio Húngaro; Tanomaru‐Filho, Mário

doi:10.1590/0103-6440201600340

Cited by 12 publications

(8 citation statements)

References 25 publications

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“…6,21,22 Furthermore, the bonding interface must remain intact over time and not compromise clinical procedures, such as the removal of part of the sealing material for the installation of root canal posts, because the teeth are subjected to mechanical forces that can displace the sealing material beyond root canal limits. 23,24 Therefore, in the present study, the BS of the filling material was evaluated after 24 h and 6 months of storage in water.…”

Section: Discussionmentioning

confidence: 99%

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Chlorhexidine and proanthocyanidin enhance the long-term bond strength of resin-based endodontic sealer

et al. 2018

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The aim of this study was to evaluate the effects of proanthocyanidin (PA) and chlorhexidine (CHX) on the bond strength (BS), failure pattern, and resin-dentin interface morphology of the endodontic sealers EndoREZ and AH Plus after 24 h and 6 months of water storage. A total of 120 prepared bovine roots were divided into six groups: AH Plus, CHX+AH Plus, PA+AH Plus, EndoREZ, CHX+EndoREZ, and PA+EndoREZ. Dentin was treated for 1 or 5 min with 2% CHX or 15% PA, respectively. Roots were filled and stored in water for 24 h or 6 months (n = 10). Root slices were subjected to push-out test and scanning electron microscopy (SEM). Data were compared using two-way ANOVA and student's t-test (α = 5%). BS decreased over time for AH Plus and untreated EndoREZ (p < 0.05). At 24 h, AH Plus had higher BS than EndoREZ (p < 0.001), with no differences among treatments for both sealers (p > 0.05). At 6 months, EndoREZ had higher BS values for CHX and PA than control (p < 0.05). AH Plus had higher BS than EndoREZ (p < 0.001), while with CHX or PA, similar BS was observed in both sealers (p > 0.05). Cohesive and mixed failures were observed in all groups. SEM revealed sealer tags in the root dentin. In conclusion, BS decreased with time and AH Plus had higher BS than EndoREZ in untreated dentin; however, CHX or PA enhanced long-term BS of EndoREZ. Overall, dentin treatment affected failure pattern and resin-dentin interface morphology, particularly for EndoREZ.

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Section: Discussionmentioning

confidence: 99%

“…fidelity in results. 24,25,26,27 However, this method is limited by the standardization of specimen positioning, which is essential for reproducibility 8 . In the present study, specimens were positioned upright to the dentinal tubules, which act as a retaining force within the root canal.…”

Section: Discussionmentioning

confidence: 99%

Chlorhexidine and proanthocyanidin enhance the long-term bond strength of resin-based endodontic sealer

et al. 2018

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“…The specimens were fixed in a device to create the retrograde cavities and to favor parallelism of the dentin walls, according to Vivan et al . [ 26 ]. The retrograde cavities were prepared with a 12/90D diamond insert coupled to a piezoelectric ultrasonic device (Piezon master 200, EMS, Nyon, Switzerland) measuring 3 mm in depth and 1.5 mm in diameter, with constant irrigation.…”

Section: Methodsmentioning

confidence: 99%

“…The maximum force to dislocate the cement from canal was measured in newtons (N). The bond strength was calculated in MPa by dividing the force in N by the area of the canal in mm 2 [ 26 ].…”

Section: Methodsmentioning

confidence: 99%

Effect of ultrasonic agitation on push-out bond strength and adaptation of root-end filling materials

et al. 2018

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ObjectivesThis study evaluated the effect of ultrasonic agitation of mineral trioxide aggregate (MTA), calcium silicate-based cement (CSC), and Sealer 26 (S26) on adaptation at the cement/dentin interface and push-out bond strength.Materials and MethodsSixty maxillary canines were divided into 6 groups (n = 10): MTA, S26, and CSC, with or without ultrasonic activation (US). After obturation, the apical portions of the teeth were sectioned, and retrograde cavities were prepared and filled with cement by hand condensation. In the US groups, the cement was activated for 60 seconds: 30 seconds in the mesio-distal direction and 30 seconds in the buccal-lingual direction, using a mini Irrisonic insert coupled with the ultrasound transducer. After the materials set, 1.5-mm thick sections were obtained from the apexes. The presence of gaps and the bond between cement and dentin were analyzed using low-vacuum scanning electron microscopy. Push-out bond strength was measured using a universal testing machine.ResultsUltrasonic agitation increased the interfacial adaptation of the cements. The S26 US group showed a higher adaptation value than MTA (p < 0.05). US improved the push-out bond strength for all the cements (p < 0.05).ConclusionsThe US of retrograde filling cements enhanced the bond to the dentin wall of the root-end filling materials tested.

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“…In addition to material characteristics, the adaptation of the retrograde filling to the apical root dentin is vital for the success of the surgical therapy. [5] The adaptation and the interface between the root dentine and the retrograde filling materials have been determined by pushout tests. It is a mechanical test to measure the resistance of the tested material to dislodgment and its adhesive property.…”

Section: Introductionmentioning

confidence: 99%

Comparative evaluation of the pushout bond strength of two root-end materials: An in vitro study

Hegde

Bhat

2019

J Conserv Dent

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Aim:The aim of this study is to evaluate the pushout bond strength of two bioceramic materials, two component calcium trisilicate material (biodentine), and premixed calcium trisilicate putty (Endosequence root repair material-fast set putty).Subjects and Methods:20 maxillary incisors were used in the study. Apical sections of 3mm were obtained and retro cavities to a depth of 3mm were prepared using a straight fissure bur. Another transverse section was made 4-mm coronal to the previous section. The specimens were placed into acrylic resin rings and separated into two groups and their cavities filled with the materials. The pushout test was carried out using a universal testing machine at a cross head speed of 0.5 mm/min, and the specimens were examined in a stereomicroscope at to evaluate the modes of failure.Statistical Analysis:The pushout bond strength values were analyzed using the unpaired t-test, and the modes of failure were compared using Fisher's exact test.Results:The pushout bond strength was seen to be significantly higher (P < 0.001) for the two-component calcium trisilicate material (11.596 ± 3.309). Cohesive failure patterns were observed in both the test groups.Conclusion:Two component calcium trisilicate material demonstrated higher bond strength values to apical dentine.

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Push-out Bond Strength of Root-end Filling Materials

Cited by 12 publications

References 25 publications

Chlorhexidine and proanthocyanidin enhance the long-term bond strength of resin-based endodontic sealer

Chlorhexidine and proanthocyanidin enhance the long-term bond strength of resin-based endodontic sealer

Effect of ultrasonic agitation on push-out bond strength and adaptation of root-end filling materials

Comparative evaluation of the pushout bond strength of two root-end materials: An in vitro study

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