Push‐out bond strength of various surface treatments on fiber post to root canal dentine using different irrigation techniques

Abstract The aim of this study was to evaluate the effect of different glass fiber posts (GFPs) diameters on the push-out bond strength to dentin. Forty unirradicular human teeth were endodontically treated and used for cementation of GFPs (White Post DC, FGM) with different diameters (n=10): P1 - ø 1.6 mm coronal x 0.85 mm apical; P2 - ø 1.8 mm coronal x 1.05 mm apical; P5 - ø 1.4 mm coronal x 0.65 mm apical; and PC - customized post number 0.5 with composite resin (Tetric Ceram A2, Ivoclair Vivadent). All GFPs were cemented into the root canal using a dual-curing luting composite (Variolink II, Ivoclar Vivadent). One slice (1.7 mm) of each root third of cemented GFP (cervical, middle, and apical) was submitted to push-out testing. Failure modes of all specimens were classified as: adhesive failure between resin cement and post; adhesive failure between dentin and resin cement; cohesive failure within resin cement, post or dentin; and mixed failure. The data were analyzed with two-way ANOVA and Tukey’s test (a=0.05). The highest bond strength values were presented for the P2 and PC groups. There was no statistically significant difference between the GFP thirds in each group. The groups P2, P5, and PC showed predominantly adhesive failure. For P1, the most prevalent type of failure was adhesive between resin cement and post. It may be concluded that a glass fiber post that is well adapted to the root canal presents higher bond strength values, regardless of GFP third.

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Effect of Chlorhexidine Treatment Prior to Fiber Post Cementation on Long-Term Resin Cement Bond Strength

Operative Dentistry ◽

10.2341/16-241-lr2 ◽

2018 ◽

Vol 43 (2) ◽

pp. E72-E80 ◽

Cited By ~ 1

Author(s):

M Durski ◽

M Metz ◽

G Crim ◽

S Hass ◽

R Mazur ◽

...

Keyword(s):

Bond Strength ◽

Root Canal ◽

Vertical Axis ◽

Resin Cement ◽

Fiber Post ◽

Resin Cements ◽

Single Root ◽

Number Of Cycles ◽

Push Out

SUMMARY The purpose of this study was to evaluate the push-out bond strength of two different adhesive cements (total etch and self-adhesive) for glass fiber post (GFP) cementation in simulated, long-term service (thermocycling) when the root canal is treated with chlorhexidine before cementation. One hundred twenty premolar specimens with a single root canal were selected, endodontically treated, and shaped for GFP cementation (n=120). The specimens were randomly placed into one of 12 groups (10 specimens each) according to cement (T = total-etch RelyX ARC or S = self-adhesive RelyX Unicem), treatment with chlorhexidine (N or Y: without or with), and number of thermal cycles (00, 20, or 40: 0, or 20,000 or 40,000 cycles): 1. TN00, 2. TN20, 3. TN40, 4. TY00, 5. TY20, 6. TY40, 7. SN00, 8. SN20, 9. SN40, 10. SY00, 11. SY20, 12. SY40. The root of each specimen was cut perpendicular to the vertical axis, yielding six 1.0 mm-thick sections. A push-out bond strength test was performed followed by statistical analysis using a factorial analysis of variance. Pairwise comparisons of significant factor interactions were adjusted using the Tukey test. Significant differences of push-out bond strengths were found in the four main effects (resin cement [p<0.0001], treatment with chlorhexidine [p<0.0001], number of cycles [p<0.0001], and root third [p<0.0001]) and all interactions (p<0.05 for all). Both resin cements produced higher bond strength in the cervical third followed by the middle third, and lower values were detected in the apical third. Additionally, the results suggest that the use of an additional disinfection treatment with chlorhexidine before the cement application produced the highest push-out bond strength regardless of root third. Further, the thermocycling simulation decreased the bond strength for both resin cements long-term when the chlorhexidine was not applied before cementation. However, when the root canal was treated with chlorhexidine and the fiber post was cemented with self-adhesive cement, the bond strength increased after 0, 20,000 and 40,000 cycles.

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Adhesive Durability Inside the Root Canal Using Self-adhesive Resin Cements for Luting Fiber Posts

Operative Dentistry ◽

10.2341/17-017-l ◽

2017 ◽

Vol 42 (6) ◽

pp. E167-E176 ◽

Cited By ~ 2

Author(s):

K Bitter ◽

A Maletic ◽

K Neumann ◽

L Breschi ◽

G Sterzenbach ◽

...

Keyword(s):

Bond Strength ◽

Root Canal ◽

Fiber Post ◽

Resin Cements ◽

Adhesive Resin ◽

Fiber Posts ◽

Silver Deposits ◽

Bond Strengths ◽

One Year ◽

Push Out

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 ultrasonic and Nd: Yag laser activation on irrigants on the push-out bond strength of fiber post to the root canal

Journal of Applied Oral Science ◽

10.1590/1678-7757-2018-0420 ◽

2019 ◽

Vol 27 ◽

Cited By ~ 5

Author(s):

Funda Fundaoğlu Küçükekenci ◽

Ahmet Serkan Küçükekenci

Keyword(s):

Bond Strength ◽

Root Canal ◽

Fiber Post ◽

Yag Laser ◽

Push Out

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Evaluation of Various Pretreatments to Fiber Post on the Push-out Bond Strength of Root Canal Dentin

Journal of Endodontics ◽

10.1016/j.joen.2017.03.006 ◽

2017 ◽

Vol 43 (7) ◽

pp. 1180-1185 ◽

Cited By ~ 10

Author(s):

Ömer Kırmalı ◽

Özlem Üstün ◽

Alper Kapdan ◽

Alper Kuştarcı

Keyword(s):

Bond Strength ◽

Root Canal ◽

Fiber Post ◽

Root Canal Dentin ◽

Push Out

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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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COMPARATIVE EVALUATION OF PUSH-OUT BOND STRENGTH OF FIBER POST LUTED INSIDE THE ROOT CANAL USING LIGHT CURE FLOWABLE COMPOSITE AND DUAL CURE RESIN - AN INVITRO STUDY

International Journal of Advanced Research ◽

10.21474/ijar01/12390 ◽

2021 ◽

Vol 9 (01) ◽

pp. 1058-1064

Author(s):

Aamir Bashir ◽

◽

Adil Fayaz ◽

Sandeep Kaur Bali ◽

Shazana Nazir Qazi ◽

...

Keyword(s):

Bond Strength ◽

Root Canal ◽

Testing Machine ◽

Storage Period ◽

Resin Cement ◽

Fiber Post ◽

Maxillary Central Incisor ◽

Flowable Composite ◽

Luting Agents ◽

Push Out

Aim: The aim of this study was to compare by means of Push-Out test the difference in bond strength of two different luting agents with fibre post, and the effect of anatomical root levels on the bond strength of each cement. Materials and Methods: A total of 40 freshly extracted maxillary central incisor and canine teeth were included in the study. The teeth were divided into two groups of twenty each, and were assigned to Groups A and B according to the luting agent (light cure, dual cure) used to cement the post inside the root canal. After decoronation, 10 mm standardized post spaces were prepared inside each root. Luting of fiber posts was carried out, as per manufacturers recommendations, with the respective luting agents. Each root was embedded in a cuboidal plaster block and sectioning was carried out to obtain three slices of 2.5 mm thickness from the coronal, middle and apical aspect of the root. This was followed by Push-Out testing on a Universal Testing Machine after a storage period of 2 months. The recorded data were subjected to statistical analysis. Results: Significant differences were found in the bond strength of light cure flowable composite and dual cure resin cement (p<.05) at different anatomical root levels. In the inter-group comparison it was found that dual cure presents superior mean bond strength in comparison with light cure composite. Conclusion: It was concluded from this study that dual cure resin cement is the best material for luting fiber post to root canal. The push-out bond strength was lower in the apical third than the coronal third for light activated cements. Also, light cure flowable composite performs better when shorter posts are used.

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Resin push-out bonding strength to root canal dentin: effect of the irrigation solution application prior to post cementation

Brazilian Dental Science ◽

10.14295/bds.2017.v20i2.1426 ◽

2017 ◽

Vol 20 (2) ◽

pp. 85 ◽

Cited By ~ 1

Author(s):

Silvia Michida ◽

Amanda Maria de Oliveira Dal Piva ◽

João Paulo Mendes Tribst ◽

Rodrigo Othávio Assunção Souza ◽

Geraldo Lombardo ◽

...

Keyword(s):

Bond Strength ◽

Root Canal ◽

Adhesive System ◽

Resin Cement ◽

Fiber Post ◽

Root Canals ◽

Irrigation Solution ◽

Root Canal Dentin ◽

Push Out ◽

Resin Bonding

Objective: To evaluate the effect of different irrigation solutions prior to post cementation on the resin bonding to bovine root dentine. Material and Methods: 60 bovine roots (16 mm) were prepared to 12 mm with specific drill of a double-tapered fiber post system, included in PMMA, and divided into 6 groups, considering the irrigation solutions (IS) prior to cementation: Gr1- saline solution (control), Gr2- NaOCl 0.5 %, Gr3- NaOCl 1 %, Gr4- NaOCl 2.5 %, Gr5- NaOCl 5 %, Gr6- Chlorexidine 2 % (solution). The root canals were irrigated with IS 20 ml during 10 min. Then they were rinsed with 20 ml of distilled water and dried with paper points. One fiber post was molded with polyvinylsiloxane and 60 posts made of resin cement (PRC) were obtained moments before the cementation. The root canal dentin was etched with H2PO3 37 %/15 s + washing/drying, a multi-bottle etch&rinse adhesive system was applied and the PRC were resin luted with dual resin cement (DuolinkTM, Bisco). Each specimen was cut into 4 slices of ±1.8mm in thickness and submitted to push-out test (1 mm/min). Results: ANOVA showed that bond strength was significantly affected by IS (P<0.0001). The highest bond strengths (MPa) were those for the groups 4 (3.51 ± 1.52) and 5 (3.0 ± 1.16). The groups 1 (0.70 ± 0.30), 2 (0.80 ± 0.24), 3 (1.26 ± 0.57) and 6 (0.90 ± 0.41) were statistically similar to each other. Conclusion: The resin bonding to the root dentine was higher when higher concentrations of hypochlorite solutions were used.KeywordsBond strength; Irrigation solutions; Push-out test; Resin cement; Root canal dentin.

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