Limitations of Push-out Test in Bond Strength Measurement

Chen, Weng-Pin; Chen, Yen-Yin; Huang, Shih-Hao; Lin, Chang‐Ching

doi:10.1016/j.joen.2012.11.002

Cited by 90 publications

(106 citation statements)

References 30 publications

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“…Thus, this methodology is recommended to study the bond strength between fiberglass posts and root canal dentin (25). Chen et al (27) evaluated the effects of pin diameter, specimen thickness and elastic modulus of the filling material on bond strength measurements and found that all of these variables influenced the push-out bond strength. This means that bond strength values obtained from studies with different experimental setups cannot be compared.…”

Section: Discussionmentioning

confidence: 99%

Effect of gutta-percha solvents on fiberglass post bond strength to root canal dentin

et al. 2014

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The purpose of this study was to investigate the influence of gutta-percha solvents on the bond strength of fiberglass post to root canal dentin. Forty bovine incisors were decoronated, prepared, filled, and randomly distributed into four groups (n = 10) according to the gutta-percha solvent used: control, xylene, eucalyptol and orange oil. After root canal treatment, the posts were cemented into the prepared root canals using a resin-based cement. A micro pushout test was executed, and the patterns of failure were assessed with microscopy. The data were analyzed using two-way ANOVA followed by Tukey's test. The control group exhibited greater bond strength compared to the eucalyptol group in the cervical and middle thirds of the root (P < 0.05); however, it did not differ significantly from the xylene and orange oil groups (P > 0.05). No difference was observed in the values of the xylene, orange oil, and eucalyptol groups (P > 0.05). The cervical third had higher values than the apical third for all tested solvents (P < 0.05). Adhesive failure between resin cement and dentin was the most frequent type of failure. The use of xylene and orange oil as gutta-percha solvents did not influence the bond strength of fiberglass posts to root canal dentin. (J Oral Sci 56, 105-112, 2014)

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Section: Discussionmentioning

confidence: 99%

Effect of gutta-percha solvents on fiberglass post bond strength to root canal dentin

et al. 2014

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“…Smaller diameter of plunger size (50%-60%) than canal diameter will cause puncture of the filling material and decreases the bond strength result which will represent reading of strength of the filling material itself. (18,19) This effect disappears when the plunger diameter was 90% of the canal space, so it sets closer to the canal diameter and the stress will be concentrated near the sealer dentine interface. In the current study, three plunger sizes were used for coronal, middle and apical sections to decrease the effect of that variable as possible.…”

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confidence: 99%

Assessment of Push-Out Bond Strength and Interfacial Adaptation of Two New Endodontic Sealers; Endosequence Bc and Mta Fillapex to Root Canal Dentine (An in Vitro Study).

Nafiz¹,

Yacoub²,

Ahmed³

2018

IJAR

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Introduction: the aim of this in vitro study was to evaluate push-out bond strength and interfacial adaptation to dentine wall of EndoSequence BC (BC) and MTA Fillapex sealers compared to AH Plus sealer (AH+). Methods: sixty-six human extracted single rooted teeth with single root canal were selected and the crowns were removed at the level of CEJ to standardized the roots length (16 mm). Samples were instrumented using ProTaper universal NiTi rotary system up to size F5. After irrigation and smear layer removal samples were randomly divided according to tested sealer used into three groups of 22 sample each, and then obturated using lateral compaction technique and stored for 1 week before testing. Each group was subdivided according to test into two subgroups of 11 sample each, push-out test or interfacial adaptation. Data were statistically analyzed by one-way ANOVA and Tukay's post-hoc test (P≤0.05). Results: AH Plus has a statistically significant higher bond strength value than each of EndoSequence BC group and MTA Fillapex group. Regarding interfacial adaptation there was no statistically significant difference between the three sealers. Conclusion: EndoSequence BC bioceramic sealer, MTA Fillapex MTA based sealer showed their inferiority regarding push-out bond strength when compared to AH Plus resin based sealer. All of the three sealers showed different grades of gap width along the whole length of root canal wall.

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“…Chen et al [23] suggested that the pin diameter should be < 0.85 times the filler diameter, but not so small as to puncture the filler material. They also claimed that the push-out bond strength formula is only suitable for a specimen thickness > 0.6 times the filler.…”

Section: Discussionmentioning

confidence: 99%

Does Adding Various Accelerators to Mineral Trioxide Aggregate Have a Negatively Effect on Push-Out Bond Strength?

Ilker

Sarıyılmaz

Çakıcı³

2018

Med Princ Pract

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Objective: This study compares the effect of the white mineral trioxide aggregate (WMTA) accelerators, including disodium hydrogen orthophosphate (Na₂HPO₄; 2.5 wt%), calcium chloride (CaCl₂; 5 and 10 wt%), and KY jelly, on the push-out bond strength of WMTA. The null hypothesis was that the WMTA accelerators would not affect the push-out bond strength of WMTA. Materials and Methods: Slices (2-mm-thick) were obtained from 75 human mandibular molar distal roots. The slices were enlarged up to size 6 Gates-Glidden burs to obtain a 1.5-mm canal diameter. The slices were randomly divided into 4 experimental groups and a control group (n = 15 in each group). Freshly prepared WMTA mixture was placed into the root slices and stored at 37°C in a 100% humidified atmosphere for 60 days. The force required to dislodge the WMTA cement from the root slice was determined using a universal testing machine. The push-out bond strength was calculated. Results: Push- out bond strength of 5- and 10-wt% CaCl₂, and 2.5-wt% Na₂HPO₄ WMTA groups was significantly lower than in the KY-jelly and control groups (p < 0.05). The mean push-out bond strength of KY jelly was lower than in the control group but not statistically significant. Conclusion: The addition of KY jelly to WMTA did not have an adverse effect on the push-out bond strength of WMTA, in contrast to the other accelerators, including Na₂HPO₄ and CaCl₂, which reduced the push-out bond strength.

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Limitations of Push-out Test in Bond Strength Measurement

Cited by 90 publications

References 30 publications

Effect of gutta-percha solvents on fiberglass post bond strength to root canal dentin

Effect of gutta-percha solvents on fiberglass post bond strength to root canal dentin

Assessment of Push-Out Bond Strength and Interfacial Adaptation of Two New Endodontic Sealers; Endosequence Bc and Mta Fillapex to Root Canal Dentine (An in Vitro Study).

Does Adding Various Accelerators to Mineral Trioxide Aggregate Have a Negatively Effect on Push-Out Bond Strength?

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