Push‐out strength of root fillings with or without thermomechanical compaction

Carneiro, Sérgio Murilo; Sousa‐Neto, Manoel Damião; Rached-Junior, Fuad Jacob Abi; Miranda, Carlos Eduardo Saraiva; Silva, S. R. C.; Silva-Sousa, Yara Teresinha Corrêa

doi:10.1111/j.1365-2591.2012.02039.x

Cited by 78 publications

(97 citation statements)

References 25 publications

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“…The penetration of endodontic sealers into dentinal tubules and bond strength to the dentin is directly associated with the removal of smear layers (1,2), physical and chemical properties of the sealer (3) and root canal filling technique (4).…”

Section: Introductionmentioning

confidence: 99%

Influence of Root Canal Filling Techniques on Sealer Penetration and Bond Strength to Dentin

et al. 2017

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The influence of root canal filling techniques on the penetration of AH Plus into dentinal tubules was evaluated using confocal laser scanning microscopy (CLSM) and the impact on the bond strength of the filling material on the root dentin was evaluated using the push-out test. Roots of the maxillary central incisors (n=40) were prepared with ProTaper Universal and assigned to four groups: lateral condensation, vertical compaction, modified Tagger hybrid and single cone. After root canal filling with gutta-percha and AH Plus, along with the addition of 0.01% fluorescein, the roots were cut into 2-mm slices. CLSM was performed on the first slice of each root third, followed by the push-out test. The second slice was analyzed under SEM. ANOVA demonstrated a statistically significant difference between the root canal filling techniques and the root thirds (p<0.05). For percent penetration, Tukey's test showed that the vertical compaction (91.77±13.51), lateral condensation (89.18±10.91) and modified Tagger hybrid (87.53±15.42) presented the highest values, which significantly differed (p<0.05) from those of the single cone (78.19±22.46). For bond strength (MPa), lateral condensation (3.42±0.54) and vertical compaction (3.47±0.53) had the highest values (p<0.05), while the modified Tagger hybrid (2.19±0.41) and single cone (0.54±0.21) had the lowest. In conclusion, the lateral condensation, vertical compaction and Modified Tagger's hybrid techniques resulted in greater penetration and bond strength to the intra-radicular dentin.

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Section: Introductionmentioning

confidence: 99%

Influence of Root Canal Filling Techniques on Sealer Penetration and Bond Strength to Dentin

et al. 2017

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“…Failure mode was considered "adhesive failure" if sealer was totally separated from dentin (i.e., dentin surface without sealer); considered "cohesive failure" if fracture occurred within the sealer (i.e., dentin surface was totally covered by sealer); or "mixed failure" when a mixture of adhesive and cohesive failure modes occurred (i.e., dentin surface partially covered by sealer) 14) . The failure modes were not statistically analyzed.…”

Section: Failure Mode Analysismentioning

confidence: 99%

Effects of calcium hydroxide and propolis intracanal medicaments on bond strength of resin-based endodontic sealer as assessed by push-out test

2013

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The aim of this study was to investigate the effects of calcium hydroxide (Ca(OH) 2 ) and propolis intracanal medicaments on bond strength of AH Plus to root dentin. After chemomechanical instrumentation using Revo-S rotary system, three groups of root canal specimens were prepared: 10 root canals were left untreated as controls (G1), 10 received Ca(OH) 2 intracanal medicament (G2), and another 10 received propolis intracanal medicament (G3). Canals were obturated with AH Plus and gutta-percha. After bond strength evaluation using micro push-out test, data were analyzed using ANOVA and Tamhane's test (p=0.05). At coronal and middle thirds, there were no significant differences in bond strength among the three groups (p>0.05). At apical third, G3 was significantly superior to G2 (p<0.05) and G1 (p<0.05), but there was no significant difference between G2 and G1 (p>0.05). Therefore, when AH Plus was used as the sealer in endodontic treatments, its combined use with propolis as an intracanal medicament seemed to result in favorable sealer-dentin interfacial bond strength.

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“…According to Carneiro et al, 24 epoxy-based sealers (AH Plus) penetrate deeper into the microirregularities because of its flowability and long polymerization time, which in turn enhances the mechanical interlocking between sealer and dentin. In addition, the cohesion between the sealer molecules increases the resistance to displacement of the material from dentin surfaces, which translates into greater adhesion.…”

Section: Discussionmentioning

confidence: 99%

“…22 Furthermore, the pushout test causes failure parallel to the dentin/material interface, which is similar to that observed in clinical circumstances. 23,24 In this study, the push-out test was used to compare the bond strength of two different thermoplastic filling techniques using epoxy-and methacrylate-based sealers. Differences in bond strength were observed between the techniques as well as the sealer types used, thereby rejecting the null hypothesis.…”

Section: Discussionmentioning

confidence: 99%

Effect of thermoplastic filling techniques on the push-out strength of root sealing materials

et al. 2016

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This study evaluates the effect of two thermoplastic obturation systems (MicroSeal and Obtura II) on bond strength of different sealers to intraradicular dentin. Sixty root canals of human canines were prepared using ProTaper rotary files (crown-down technique) and irrigated with 2.5% sodium hypochlorite and 17% EDTA. The root canals were filled by MicroSeal, Obtura II, or lateral compaction techniques using AH Plus and Epiphany SE. 1.5 mm thick root slices were subjected to the push-out test. ANOVA and Tukey's test showed that the bond strength values (MPa) observed in the groups obturated with MicroSeal (2.96 ± 2.72) and Obtura II (2.68 ± 2.18) did not significantly differ from each other (p > 0.05) but were significantly higher than that observed in the group obturated with lateral condensation (2.01 ± 1.48; p < 0.05). There were no statistically significant differences in strength (p > 0.05) among the root canal thirds (cervical: 2.44 ± 2.03; middle: 2.50 ± 2.27; and apical: 2.70 ± 2.34). Adhesive failures were predominant (60%) in all groups. In conclusion, MicroSeal and Obtura II techniques, using AH plus sealer, increased the resistance to displacement of the filling material, when compared with lateral compaction. Moreover, when used with Epiphany SE, these obturation systems did not affect the bond strength of the material to root dentin.

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Push‐out strength of root fillings with or without thermomechanical compaction

Abstract: Lateral compaction was associated with higher bond strengths of the materials to intraradicular dentine than a hybrid technique using thermomechanical compaction. The greatest push-out strengths were obtained when the canals were filled with LC of AH Plus and GP cones.

Cited by 78 publications

References 25 publications

Influence of Root Canal Filling Techniques on Sealer Penetration and Bond Strength to Dentin

Influence of Root Canal Filling Techniques on Sealer Penetration and Bond Strength to Dentin

Effects of calcium hydroxide and propolis intracanal medicaments on bond strength of resin-based endodontic sealer as assessed by push-out test

Effect of thermoplastic filling techniques on the push-out strength of root sealing materials

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