<i>Ex vivo</i> study of the adhesion of an epoxy‐based sealer to human dentine submitted to irradiation with Er : YAG and Nd : YAG lasers

Sousa-Neto, Manoel Damião; Coelho, F. I. Silva; Marchesan, Melissa Andréia; Alfredo, Edson; Silva-Sousa, Yara Teresinha Corrêa

doi:10.1111/j.1365-2591.2005.01027.x

Cited by 114 publications

(128 citation statements)

References 21 publications

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“…Furthermore, the test's loading closely simulates clinical stresses as the applied load is perpendicular to the dentinal tubules 17) . Therefore, the push-out test allows accurate specimen standardization 18) and generates fewer stresses at the bonding interface during sample preparation than conventional tensile and shear bond testing 19) . On the other hand, it has been stated that the results of a push-out test can be affected by some variables such as specimen orientation, different root canal diameters and different plunger sizes 17) .…”

Section: Discussionmentioning

confidence: 99%

Effect of placement technique on the push-out bond strength of calcium-silicate based cements

Eren

Aksel

Serper

2016

Dental Materials Journal

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The purpose of this study was to evaluate the effects of ultrasonic and manual placement techniques on the push-out bond strength of Biodentine and MTA with and without calcium chloride. One hundred and twenty mid-root slices from forty freshly extracted single-rooted human mandibular premolar teeth were instrumented and randomly divided into six groups (n=20) according to the filling material and placement technique applied, as follows: G1: MTA-manual compaction, G2: Biodentine-manual compaction, G3: MTA+5% CaCl2-manual compaction, G4: MTA-ultrasonic activation, G5: Biodentine-ultrasonic activation, G6: MTA+5% CaCl2-ultrasonic activation. The push-out bond strengths were measured using an Instron testing machine. Data were analyzed using twoway analysis of variance (ANOVA) with Bonferroni correction. The ultrasonic activation significantly enhanced the bond strength values of the materials. Biodentine presented higher bond strength values than that of MTA groups. The addition of CaCl2 to MTA did not improve the bond strength of the material.

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Section: Discussionmentioning

confidence: 99%

Effect of placement technique on the push-out bond strength of calcium-silicate based cements

Eren

Aksel

Serper

2016

Dental Materials Journal

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“…In many studies, epoxy resin-based sealers showed higher adhesion to root canal dentin and deeper penetration into the dentinal tubules than glass ionomer-and ZnOE-based sealers 25,[27][28][29] . This meant that retention of the fi lling material might be improved by mechanically locking it into place, hence reinforcing root canal dentin to increase its fracture resistance.…”

Section: Effect Of Root Canal Sealers On Fracture Resistance Of Rootfmentioning

confidence: 99%

Resistance to fracture of roots filled with different sealers

et al. 2012

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INTRODUCTIONRoot-fi lled teeth are more susceptible to fracture than vital teeth. Ironically, these teeth which were already compromised before root canal treatment are further weakened by the process. A few reasons contribute to the vulnerability of root-fi lled teeth, chief of which is root dentin dehydration after the endodontic procedures 1) . Other reasons that predispose root-fi lled teeth to fracture include brittleness of root-fi lled teeth because of loss of tooth structure 2,3) , excessive pressure during fi lling procedures 1,4) , and excessive widening of root canals 5) . After root canal treatment, the standard fi lling material is gutta percha. To obtain a hermetic seal, gutta percha is typically used in conjunction with root canal sealers because gutta percha is incapable of bonding to root canal walls. Root canal sealers not only fi ll the voids between gutta percha points, they also fi ll the voids between gutta percha and root canal walls 6) . Bondable root canal sealers purportedly improve the seal and fracture resistance of endodontically treated roots 7,8) . To date, confl icting results were reported from different research studies. On the one hand, one study 9) found no signifi cant differences in fracture resistance between roots fi lled with a bondable root canal fi lling system, Epiphany, and those fi lled with gutta percha and an epoxy resin-based sealer, AH 26. On the other hand, a study 10) found that the fracture resistance of roots fi lled with gutta percha and AH 26 was superior to that of roots fi lled with the Epiphany system.Recently, a new root canal sealer, iRoot SP (Innovative BioCreamix Inc, Vancouver, Canada), was introduced to the market. According to the manufacturer, iRoot SP is a convenient, pre-mixed, ready-to-use injectable white hydraulic cement paste developed for permanent root canal fi lling and sealing applications. Based on a calcium silicate composition, iRoot SP is an insoluble, radiopaque, and aluminum-free material which requires the presence of water to set and harden.Another recently introduced root canal sealer is MTA Fillapex (Angelus Solucxoes Odontologicas, Londrina, Brazil). Based on an MTA (mineral trioxide aggregate) composition, other ingredients of MTA Fillapex include resins and silica (Table 1). According to the manufacturer, it has high radiopacity, low solubility in contact with tissue fl uids, low expansion during setting, and excellent viscosity for insertion. It does not stain the tooth and promotes deposition of hard tissue at the root apex and perforation sites.The purpose of the study was to compare the fracture resistance of roots fi lled with gutta percha and sealed with one of these three root canal sealers: an epoxy-based root canal sealer AH Plus (Dentsply DeTrey, Konstanz, Germany), a calcium silicate-based root canal sealer iRoot SP, and an MTA-based root canal sealer MTA Fillapex. The null hypothesis was that root canal sealers would not infl uence the fracture resistance of root-fi lled teeth. MATERIALS AND METHODS Root canal p...

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“…3,12 These techniques enable visualization of the distribution of root filling materials, such as gutta-percha and sealer, inside the canal. 3 However, the sealer bond strength is related to its ability to remain adhered to the root dentin walls, 20 and this property is important in static and dynamic situations. In static circumstances, the adhesion eliminates spaces that allow infiltration of fluids into the sealer/dentin interface.…”

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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Ex vivo study of the adhesion of an epoxy‐based sealer to human dentine submitted to irradiation with Er : YAG and Nd : YAG lasers

Abstract: An increase in frequency, independent of power settings, of the lasers used in this study increased adhesion of an epoxy-based root canal sealer.

Cited by 114 publications

References 21 publications

Effect of placement technique on the push-out bond strength of calcium-silicate based cements

Effect of placement technique on the push-out bond strength of calcium-silicate based cements

Resistance to fracture of roots filled with different sealers

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

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