Effect of retreatment on the push-out bond strength of MTAbased and epoxy resin-based endodontic sealers

Yavari, Hamid Reza; Shahi, Shahriar; Galledar, Saeedeh; Samiei, Mohammad; Janani, Maryam

doi:10.15171/joddd.2017.008

Cited by 9 publications

(9 citation statements)

References 30 publications

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“…The present study showed that, any of the EndoSequence BC specimens revealed cohesive bond failure which in contrast to [42] who inspected samples filled with gutta percha/ AH Plus and gutta-percha/ EndoSequence BC Sealer and found that, the type of bond failure was mainly cohesive for all groups.…”

Section: Discussioncontrasting

confidence: 95%

“…But, this result was in contrast to Koch and Brave (2009) [52] who stated that, in most studies, Endosequence sealer were equivalent to epoxy resin-based sealers, which are known by its excellent bonding properties [53] . Also, this result was in disagreement with [42] who found no significant difference between the bond strength of gutta percha/ AH Plus (epoxy resin-based) and gutta-percha/EndoSequence BC Sealer.…”

Section: Discussioncontrasting

confidence: 76%

“…The slices were then examined under stereomicroscope (Olympus SZ 1145 TR, Tokyo, Japan, and Mag.110 X) and digital micrographic images with their numbers were captured and saved to determine the nature of bond failure. Each sample was categorized into one of three failure mode [42] :…”

Section: Failure Modementioning

confidence: 99%

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Push Out Bond Strength of Root Canal Filling With Epoxy Resin-Based, Mta-Based and Bioceramic-Based Endodontic Sealers

Kamha

Enan

2018

Egyptian Dental Journal

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Aim: to compare the push out bond strength of the root canal filling with epoxy resin-based (Adseal), MTA-based (MTA Fillapex) and Bioceramic-based (Endosequance BC) sealers. Materials and Methods:Forty five extracted mandibular human first premolars with straight fully formed roots were selected for this study and were de-coronated at 17 mm from the apex. All root canals were prepared by using the ProTaper Universal Ni Ti rotary system in a crown down manner up to F4 according to manufacturer's instruction to the their working length. The canals were irrigated with 17% EDTA to remove the smear layer and the final rinse was performed with 5 mL 5.25% sodium hypochlorite. The roots were randomly assigned to three groups, fifteen for each (n=15). Adseal, MTA Fillapex and Endosequence BC sealers were used with gutta percha size F4 by lateral condensation technique for groups I, II and III respectively. All roots stored in 100% humidity at 37ºC for one week for completing setting of sealers. The roots were embedded in self cure acrylic resin, and transversely sectioned perpendicular to the long axis of the root 2 mm thickness slices. Apical diameter of 0.88 ± 0.02 mm in all slices were selected for the pushout test by universal testing machine. The dislodging force was measured in Newton for all slice samples and tabulated. Push out bond strength (MPa) for every slice sample is calculated and the three groups were compared. The slices were then examined under stereomicroscope and categorized into adhesive, cohesive or mixed type of bond failure mode. The data were tabulated and statistically analyzed.Results: Endosequence bioceramic represented the highest bond strength followed by Adseal then MTA Fillapex which represented the lowest bond strength with a significant difference between them at P≤0.05. Comparison between Adseal and Endosequence bioceramic groups and between MTA Fillapex and Endosequence bioceramic groups showed a significant difference between them at P≤0.05 with higher bond strength of Endosequence bioceramic sealer. Adseal represented higher bond strength than MTA Fillapex with no significant difference between them at P≤0.05. Comparison between the three tested groups of sealers regarding the bond failure categories showed no significant difference between them at P≤0.05. (1708) Recently, MTA Fillapex (Angelus, Londrina, PR, Brazil) is MTA-based sealer presented in a paste-paste system and composed of resins, bismuth oxide, silica nanoparticles, and pigments. It is a modification of the MTA original formulations to improve the characteristics such as good radiopacity, flow, setting time, alkaline pH and adhesion, Conclusion: Within the limitations of this study, Endosequence bioceramic sealer show promising results as root canal sealer and exhibited a greater resistance to push out than MTA Fillapex and epoxy resin-based sealer (Adseal) with gutta-percha as a root canal filling.

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Section: Discussioncontrasting

confidence: 95%

Section: Discussioncontrasting

confidence: 76%

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Push Out Bond Strength of Root Canal Filling With Epoxy Resin-Based, Mta-Based and Bioceramic-Based Endodontic Sealers

Kamha

Enan

2018

Egyptian Dental Journal

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“…This method is very useful in testing the adhesion of root canal sealers and retention of posts luted in root canals [ 15 ]. The PO test is based on generating shear stress at the interface between dentin and cement, as well as between post and cement [ 16 ]. When the PO test is used to test bond strength of adhesives to dentin, a 1 to 2 mm thick dentin slice is punched to produce a tapered cylindrical hole.…”

Section: Types Of Bond Strength Testing Methodsmentioning

confidence: 99%

Assessment of Bonding Effectiveness of Adhesive Materials to Tooth Structure using Bond Strength Test Methods: A Review of Literature

Mourad

2018

TODENTJ

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Background:The rapid developments in the field of adhesive dental materials have led to improvements in many aspects of clinical dentistry. Adhesive bond strength plays an important role in determining the clinical performance and longevity of dental restorations. Nevertheless, bond strength tests have never been well-standardized, although a number of important recommendations have been made.Objective:The aim of this paper is to critically review the validity of different bond strength testing methods for assessment of bonding effectiveness of adhesive materials to tooth structure and discuss factors that may affect bond strength measurement.Data Collection:Relevant literature published between 1983 and 2018 was collected and reviewed from the PubMed database and Google scholar resources.Review Results:Results of the current bond testing methods should be used to compare materials tested under the same laboratory settings, but they shouldn’t be used to make direct inferences on their clinical behaviour. Shear and micro-shear tests, result in non-uniform stress distribution, stress concentration at the substrate area, and predominantly tensile stresses rather than shear stresses. Micro-tensile bond tests provide many advantages over the shear tests, although these methods are technique sensitive and labour intensive.Conclusion:Bond strength testing methods should be well-standardized, but there are many factors that cannot be fully controlled which leads to variation and misinterpretation of the data about the bonding abilities of adhesives.Clinical Significance:New adhesive materials should be subjected to a combination of testing protocols to properly assess their bonding effectiveness.

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“…The multiple test panels for measuring the bond strength are push-out, shear, and micro tensile strength tests. A study by Goracci et al concluded that the push-out test is very reliable as this method gives a clear clinical picture in determining the binding efficiency of the root canal sealer [ 11 ]. Therefore, we chose this method in our study.…”

Section: Discussionmentioning

confidence: 99%

The effect of four different intracanal medicaments on the push-out bond strength of root canal sealers

et al. 2022

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This study aimed to compare the effect of 4 different intracanal medicaments on the push-out bond strength of two sealers (AH Plus and MTA Fillapex). 100 single-rooted extracted premolar teeth were divided into 5 groups, with 20 samples in each group, one group being the control group. After cleaning and shaping procedures, the canals were filled with 4 different medicaments: calcium hydroxide, tri-antibiotic paste (TAP), Metapex, or Chlorhexidine (2%) gel for 2 weeks. Following this, the medicaments were rinsed away, and the samples in those sub-groups were obturated with gutta-percha/AH Plus or MTA Fillapex sealers. After 2 weeks of incubation, a 2-mm-thick middle section from each root was evaluated to test push-out strength. The obtained data were tabulated, and appropriate statistical analysis was performed (two-way ANOVA and LSD test). When comparing the average values, the bond strength values of AH Plus were significantly higher than those of MTA Fillapex (p<0.05) in all medicament groups. Based on the findings, we concluded that AH Plus had comparatively higher bond strength than MTA Fillapex. We also observed that AH Plus had higher bond strength in the presence of calcium hydroxide, whereas MTA Fillapex in the presence of Chlorhexidine. A comparison of the push-out bond strength shows that irrespective of the root canal segment or the final irrigant used, AH Plus showed higher values among all groups. The limitation of the current study was that the effect of TAP on the bond strength of endodontic sealers was not negative.

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Effect of retreatment on the push-out bond strength of MTAbased and epoxy resin-based endodontic sealers

Cited by 9 publications

References 30 publications

Push Out Bond Strength of Root Canal Filling With Epoxy Resin-Based, Mta-Based and Bioceramic-Based Endodontic Sealers

Push Out Bond Strength of Root Canal Filling With Epoxy Resin-Based, Mta-Based and Bioceramic-Based Endodontic Sealers

Assessment of Bonding Effectiveness of Adhesive Materials to Tooth Structure using Bond Strength Test Methods: A Review of Literature

The effect of four different intracanal medicaments on the push-out bond strength of root canal sealers

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