Early bond strengths 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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Regional Bond Strengths and Failure Analysis of Fiber Posts Bonded to Root Canal Dentin

Operative Dentistry ◽

10.2341/07-160 ◽

2008 ◽

Vol 33 (6) ◽

pp. 636-643 ◽

Cited By ~ 14

Author(s):

J. Aksornmuang ◽

M. Nakajima ◽

R. M. Foxton ◽

W. Panyayong ◽

J. Tagami

Keyword(s):

Failure Analysis ◽

Root Canal ◽

Clinical Relevance ◽

Fiber Post ◽

Bonding Quality ◽

Failure Patterns ◽

Fiber Posts ◽

Bond Strengths ◽

Root Canal Dentin

Clinical Relevance The bond strengths of fiber posts to root canal dentin could be affected by the characteristics of the fiber post and its bonding quality. The failure patterns of fiber-post bonded root canal dentin were dependent upon the post system.

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Various irrigation protocols for final rinse to improve bond strengths of fiber posts inside the root canal

BDJ ◽

10.1038/sj.bdj.2013.905 ◽

2013 ◽

Vol 215 (6) ◽

pp. 289-289

Keyword(s):

Root Canal ◽

Fiber Posts ◽

Bond Strengths

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The Effect of Dowel Space on the Bond Strengths of Fiber Posts

Journal of Prosthodontics ◽

10.1111/j.1532-849x.2006.00166.x ◽

2007 ◽

Vol 16 (3) ◽

pp. 154-164 ◽

Cited By ~ 50

Author(s):

Jorge Perdigão ◽

George Gomes ◽

Vitor Augusto

Keyword(s):

Fiber Posts ◽

Bond Strengths

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Push-out bond strengths of different dental cements used to cement glass fiber posts

Journal of Prosthetic Dentistry ◽

10.1016/s0022-3913(13)60353-4 ◽

2013 ◽

Vol 110 (2) ◽

pp. 134-140 ◽

Cited By ~ 31

Author(s):

Jefferson Ricardo Pereira ◽

Accácio Lins do Valle ◽

Janaina Salomon Ghizoni ◽

Fábio César Lorenzoni ◽

Marcelo Barbosa Ramos ◽

...

Keyword(s):

Glass Fiber ◽

Fiber Posts ◽

Glass Fiber Posts ◽

Bond Strengths ◽

Push Out

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Adhesion of real seal to human root dentin treated with different solutions

Brazilian Dental Journal ◽

10.1590/s0103-64402012000500009 ◽

2012 ◽

Vol 23 (5) ◽

pp. 521-526 ◽

Cited By ~ 3

Author(s):

Renata Baldissera ◽

Ricardo Abreu da Rosa ◽

Márcia Helena Wagner ◽

Milton Carlos Kuga ◽

Fabiana Soares Grecca ◽

...

Keyword(s):

Bond Strength ◽

Root Canal ◽

Failure Modes ◽

Chlorhexidine Gluconate ◽

The Other ◽

Significant Difference ◽

Root Dentin ◽

Bond Strengths ◽

Group 2 ◽

Push Out

The aim of this study was to evaluate the effects of different irrigants on sealer-dentin bond strength when using Real Seal. Thirty single-rooted teeth were divided into 3 groups. In one group, the teeth were irrigated with 3 mL of 2.5% NaOCl after each file change, flushed with 17% EDTA for 3 min and finally rinsed with 3 mL of 2.5% NaOCl. In the other two groups, rinse with NaOCl was replaced with 2% chlorhexidine gluconate (CHX) and 0.9% saline, respectively. Each root was sectioned transversally into apical, middle and coronal thirds to obtain 2-mm-thick slices. Each slice was filled with Real Seal and Resilon. Push-out test was used to analyze bond strength and failure modes were classified as adhesive, cohesive or mixed, according to SEM observations. The push-out test did not reveal any statistically significant difference (p>0.05) between the irrigants. However, the groups exhibited significantly different (p<0.05) bond strengths in terms of the root canal third. Higher bond strength was observed at the apical third when compared with coronal third, while middle third presented intermediary values. Fifteen specimens were analyzed by SEM (5 per group). Eleven specimens exhibited adhesive failures (5 in saline, 4 in NaOCl and 2 in CHX group); 2 cohesive failures were observed in the CHX group, and 1 mixed failure each was observed in the CHX and NaOCl groups. The tested irrigants did not influence the bond strength of Resilon and Real Seal to dentin. The apical third exhibited higher mean bond strengths and adhesive failures were predominant.

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