Effect of cementation protocol on push-out bond strength of fiber posts to root canal

SUMMARY Objectives: The aim of the study was to investigate the effects of various self-adhesive resin cements on the push-out bond strengths and nanoleakage expression at the luting interfaces of fiber posts immediately and after one year of aging. Methods and Materials: One hundred forty-four extracted human anterior teeth were endodontically treated. After post space preparation, fiber posts were luted using five commercially available self-adhesive resin (SAR) cements and a core build-up material applied with a self-etch adhesive (BF: Bifix SE/Rebilda Post, VOCO; CSA: Clearfil SA Cement/Rely X Fiber Post, 3M ESPE; RX: RelyX Unicem 2/Rely X Fiber Post, 3M ESPE; SPC: Speed Cem/FRC Postec, Ivoclar Vivadent; SMC: Smart Cem/X Post, Dentsply; RB: Rebilda DC-Futurabond/Rebilda Post; n=22). For each group, half of the specimens were subjected to thermocycling (TC) (5°C-55°C, 10,000 cycles) and stored humid for one year at 37°C. Push-out bond strength data of six slices (thickness 1 mm) per root and nanoleakage expression of representative specimens were evaluated after 24 hours (baseline) and after TC and storage for one year (aging), respectively. Results: Bond strength differed significantly among resin cements (p<0.0005) and the location inside the root canal (p<0.0005), but not by aging (p=0.390; repeated-measures analysis of variance). SMC (14.6±5.8 MPa) and RX (14.1±6.8 MPa) revealed significantly higher bond strength compared to BF (10.6±5.4 MPa) and RB (10.0±4.6 MPa) but differed not significantly from SPC (12.8±4.8) MPa; CSA (6.1±4.6 MPa) revealed significantly lower bond strength compared to all other investigated materials (p<0.05; Tukey Honestly Significantly Different). Qualitative nanoleakage analysis revealed more silver deposits at the interface in all groups after aging. For CSA, a large amount of silver deposits inside the cement was also observed at baseline and after aging. Conclusions: Fiber post luting using SAR cements demonstrated reliable bond strengths. Product-specific differences and initial degradation effects could be demonstrated.

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Effect of Nd:YAG laser in the bond strength of fiberglass posts

Brazilian Dental Science ◽

10.14295/bds.2015.v18i4.1164 ◽

2015 ◽

Vol 18 (4) ◽

pp. 19

Author(s):

Rayssa Ferreira Zanatta ◽

Beatriz Maria da Fonseca ◽

Stella Renata Steves ◽

Carlos Rocha Gomes Torres ◽

Sergio Eduardo Paiva Gonçalves

Keyword(s):

Bond Strength ◽

Laser Irradiation ◽

Nd:Yag Laser ◽

Root Canal ◽

Testing Machine ◽

Adhesive System ◽

Bonding Performance ◽

Fiber Posts ◽

Bond Strengths ◽

Push Out

<p>The aim of the present study was to compare the effects of Nd:YAG laser application in root canals on bond strengths of fiber posts. Thirty single-rooted bovines were randomly divided into three groups (n=10); root canal instrumentation was performed, and pretreatment was conducted as follows: C group: conventional treatment (without laser irradiation); ALC group: Nd:YAG laser was applied after adhesive; and LAC group: Nd:YAG laser was applied before adhesive. The fiber posts Rebilda 15 DC (Voco) were cemented with an adhesive system and resin cement, in accordance with the manufacturer’s instructions. Six slices with 1.0mm height was obtained for of each root and bond strength was measured by push-out test using a universal testing machine (0.5 mm/min). Data were analyzed using Kruskal-Wallis and Dunn’s tests (p <0.05). Push-out bond strengths to root canal dentin were affected by the type of treatment and root third. The use of Nd:YAG laser after the application of adhesive system had a higher bonding performance compared with the use of laser before the application. Also, cervical and medium third presented higher bond strength values than the apical third. It must be conclude that the laser irradiation over the non-cured adhesive system is more efficient for increase in bond strength than the irradiation after the application of the adhesive. However, the use of 60mJ of laser energy is not sufficient to improve the bonding performance.</p>

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Effect of Calcium Hypochlorite and Sodium Hypochlorite as Root Canal Irrigants on Push-Out Bond Strength of Fiber Post Cemented with Etch-and-Rinse Resin Cement: An In Vitro Study

Frontiers in Dentistry ◽

10.18502/fid.v18i18.6325 ◽

2021 ◽

Author(s):

Mahdiyeh Sheikh Ghahderijani ◽

Maryam Khoroushi ◽

Atiyeh Feiz

Keyword(s):

Bond Strength ◽

Root Canal ◽

Resin Cement ◽

Calcium Hypochlorite ◽

Root Canal Irrigants ◽

Fiber Posts ◽

Etch And Rinse ◽

Significant Difference ◽

Push Out ◽

Group 1

Objectives: Calcium hypochlorite (CH) has been recently used as a root canal irrigant. The aim of the present study was to compare the effect of CH and sodium hypochlorite (SH), as root canal irrigants, on the push-out bond strength of fiber posts cemented with an etch-and-rinse resin cement. Materials and Methods: In this experimental in-vitro study, 40 human anterior teeth with similar root lengths were randomly divided into five groups (N=8) according to the protocol of root canal irrigation as follows: group 1: saline (control); group 2: 2.5% SH; group 3: 5.25% SH; group 4: 2.5% CH; group 5: 5% CH. Before post placement, the post space was irrigated using the same irrigation protocol, and after that, they were irrigated by distilled water. Fiber posts were cemented with All-Bond 3 bonding and Dou-Link Universal cement. After thermocycling (1000 cycles, 5- 55°C), a push-out test was performed, and data were analyzed using one-way analysis of variance and Tukey's post-hoc test with SPSS version 23 (α=0.05). Results: The highest and lowest mean bond strengths were detected in groups 2 and 5, respectively. There was no significant difference between group 1 and the SH groups (P>0.05), but the difference between group 1 and the CH groups was significant (P<0.001). There was a significant difference between SH groups and CH groups (P<0.001). Conclusion: Compared to SH, as a root canal irrigant, CH decreased the push-out bond strength of fiber posts cemented with an etch-and-rinse resin cement.

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Regional bond strengths to root canal dentin of fiber posts luted with three cementation systems

Brazilian Dental Journal ◽

10.1590/s0103-64402011000600004 ◽

2011 ◽

Vol 22 (6) ◽

pp. 460-467 ◽

Cited By ~ 18

Author(s):

Giovana Mongruel Gomes ◽

Osnara Maria Mongruel Gomes ◽

Alessandra Reis ◽

João Carlos Gomes ◽

Alessandro Dourado Loguercio ◽

...

Keyword(s):

Bond Strength ◽

Root Canal ◽

Repeated Measures ◽

Resin Cement ◽

Failure Pattern ◽

Fiber Posts ◽

Significant Difference ◽

Root Canal Dentin ◽

Adhesive Cement ◽

Push Out

This study evaluated the influence of the cementation system on the regional push-out bond strength and failure pattern of fiber posts to radicular dentin. The roots of 48 extracted human incisors were prepared and divided into 3 groups (n=16), according to the cementation system: AdperScotchbond Multi-Purpose + resin cement RelyX ARC (SBMP+ARC); Adper SingleBond 2 + RelyX ARC (SB+ARC) and; RelyX U100 self-adhesive resin cement (U100). The posts were cemented as per manufacturer’s instructions for each cementation system. After 1 week, the roots were sectioned transversely into 6 discs. Two discs were obtained from the cervical, middle and apical thirds and the push-out test was carried out. The failure pattern was examined on all debonded specimens. The data were analyzed by two-way repeated measures ANOVA and Tukey’s test. When U100 was used, no statistically significant difference (p>0.05) was observed among the different root regions. Statistically higher push-out bond strength values were detected in the cervical third for SBMP+ARC and SB+ARC (p<0.05). The U100 showed significantly more mixed failures than SBMP+ARC in the apical third (p<0.05). In conclusion, the self-adhesive cement RelyX U100 was the only cement not sensitive to the root canal region.

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Push-out bond strength of quartz fiber posts to root canal dentin using total-etch and self-adhesive resin cements

Medicina Oral Patología Oral y Cirugia Bucal ◽

10.4317/medoral.17429 ◽

2012 ◽

pp. e337-e344 ◽

Cited By ~ 9

Author(s):

MA. Kahnamouei ◽

N. Mohammadi ◽

EJ. Navimipour ◽

M. Shakerifar

Keyword(s):

Bond Strength ◽

Root Canal ◽

Quartz Fiber ◽

Resin Cements ◽

Adhesive Resin ◽

Fiber Posts ◽

Root Canal Dentin ◽

Push Out

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Bond Strength of Fiber-reinforced Posts to Deproteinized Root Canal Dentin

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1583 ◽

2014 ◽

Vol 15 (5) ◽

pp. 581-586 ◽

Cited By ~ 3

Author(s):

Adilson Yoshio Furuse ◽

Leonardo Fernandes Cunha ◽

Samantha Pugsley Baratto ◽

Denise Piotto Leonardi ◽

Gisele Aihara Haragushiku ◽

...

Keyword(s):

Ascorbic Acid ◽

Bond Strength ◽

Root Canal ◽

Sodium Ascorbate ◽

Fiber Reinforced ◽

Fiber Posts ◽

Etch And Rinse ◽

One Step ◽

Root Canal Dentin ◽

Push Out

ABSTRACT Aim This study evaluated the push-out bond strength of cemented fiber posts after deproteinization of root canal dentin walls with NaOCl. The effect of the application of an antioxidant solution (sodium ascorbate) was also evaluated. Materials and methods A three-step etch-and-rinse (Scotchbond - 3M Espe) and a one-step self-etching adhesive (Xeno III - Dentsply Caulk) were evaluated. Thirty bovine incisor roots were divided into 3 groups: a. Irrigation with physiologic solution (control). b. Deproteinization with 10 minutes irrigation of 5% NaOCl. c. Deproteinization with NaOCl followed by 10 minutes irrigation with 10% ascorbic acid. Fiber posts were cemented with a dual-cured cement (Rely X ARC - 3M ESPE). The push-out bond strength was evaluated after 24 hours of storage in distilled water. The data were analyzed with three-way ANOVA, one-way ANOVA and Tukey's test (á = 0.05). Results There were significant differences between groups (p < 0.05). The bond strength of Scotchbond was not influenced by the deproteinization. Xeno III showed a decrease in bond strength when deproteinized with 5% NaOCl (p < 0.05). For Xeno III, the subsequent irrigation with ascorbic acid was able to reverse the effect of the deproteinization. Considering the radicular thirds, the bond strength varied in the sequence—apical < middle < coronal. Conclusion Only the all-in-one adhesive was influenced by the deproteinization. Considering the respective control groups, both systems showed similar bond strength results. Clinical significance The decreased bond strength of the selfetching adhesive following deproteinization seams to be related to the oxidant effect of the NaOCl solution and the subsequent irrigation with ascorbic acid was able to reverse the effect of the deproteinization. How to cite this article Furuse AY, Cunha LF, Baratto SP, Leonardi DP, Haragushiku GA, Gonzaga CC. Bond Strength of Fiber-reinforced Posts to Deproteinized Root Canal Dentin. J Contemp Dent Pract 2014;15(5):581-586.

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Endodontic sealers and post-endodontic waiting time affect the bond strength of the fiber posts

Revista de Odontologia da UNESP ◽

10.1590/1807-2577.00120 ◽

2020 ◽

Vol 49 ◽

Author(s):

Thais Camponogara BOHRER ◽

Patricia Eliana FONTANA ◽

Vinícius Felipe WANDSCHER ◽

Victor Hugo Carvalho MORARI ◽

Rafael PILLAR ◽

...

Keyword(s):

Bond Strength ◽

Waiting Time ◽

Root Canal ◽

Waiting Times ◽

Mineral Trioxide Aggregate ◽

Fiber Post ◽

Root Canal Filling ◽

Fiber Posts ◽

Endodontic Sealers ◽

Push Out

Abstract Introduction The resistance adhesive of a fiber post can be affected by several factors, such as the endodontic sealer and post-endodontic waiting time. Objective The aim of this study was to evaluate the effect of different endodontic sealers and two different post-endodontic waiting times on the bond strength of fiber posts. Material and method Seventy-two bovine teeth were endodontically treated and filled using three endodontic sealers: eugenol-based, epoxy resin-based, or mineral trioxide aggregate-based. The specimens were stored at 37°C for 24 hours or for 30 months. After the respective storage times, the root canals were prepared for luting fiber posts using RelyX U200. Push-out tests and analysis of failures were performed. The push-out data were analyzed by two-way analysis of variance to compare the effects of the endodontic sealer and with the t-test to compare the effects of post-endodontic waiting time. Result The AH Plus sealer yielded the highest bond strength values at 30 months post-endodontics (11.26 Mpa) (p < 0.05), however no had difference with Endofill sealer at the same time. Endofill and MTA Fillapex sealers did not differ significantly in their effects, irrespective of the post-endodontic waiting time. Conclusion In conclusion, the endodontic sealer used and post-endodontic waiting time affect the adhesive resistance of fiber posts. The adhesion increases significantly when the fiber post is cemented 30 months after the root canal filling, while the adhesion is reduced when cementing immediately after root canal treatment, in particular for eugenol-based endodontic sealers.

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