scholarly journals Influence of Er,Cr:YSGG Laser Irradiation on the Push-Out Bond Strength of Zirconia and Glass Fiber Posts with Radicular Dentin

2019 ◽  
Vol 2019 ◽  
pp. 1-5
Author(s):  
Raneem S. Alofi ◽  
Ibraheem F. Alshiddi ◽  
Yasser F. AlFawaz ◽  
Abdulaziz Alsahhaf ◽  
Khulud Abdulrahman Al-Aali ◽  
...  
Keyword(s):  
Bond Strength ◽  
Glass Fiber ◽  
Testing Machine ◽  
Resin Cement ◽  
Cervical Region ◽  
Fiber Posts ◽  
Significant Difference ◽  
Glass Fiber Posts ◽  
Push Out

Objective. This in vitro study was designed to evaluate the influence of an Er,Cr:YSGG laser on the bond strength of zirconia and glass fiber posts with root dentin. Materials and methods. Ninety extracted single-rooted human teeth were randomized into 6 groups (n = 15/group) on the basis of different posts (zirconia/glass fiber) and Er,Cr:YSGG laser tips (axial and radial). Specimens were prepared for push-out testing with the help of a cutting machine; six slices (2 on each cervical, middle, and apical) of approximately 1 mm thickness were sectioned for all roots on a plane perpendicular to the long axis of the post. All specimens were placed into a universal testing machine with a defined 0.5 mm/min crosshead speed until the maximum failure load was obtained. Results. The highest mean push-out bond strength of the glass fiber and zirconia groups was achieved with laser treatment. The highest push-out bond strength was achieved with the axial fiber tip (7.63 ± 1.22 MPa), and the lowest was achieved with a radial fiber tip of the glass fiber group (6.98 ± 0.96 MPa). ANOVA showed a statistically significant difference between the groups (p=0.041). The mean push-out bond strength was found to be higher with an axial fiber tip for both cervical and apical segments in the glass fiber and zirconia groups (p<0.05). The independent t-test resulted in the overall highest mean push-out bond strength in the apical segments (p=0.026). Conclusion. Within the limits of the present in vitro research study, an enhancement in the push-out bond strength of resin cement, mainly in the cervical region of the root canal, was achieved after irradiation with an Er,Cr:YSGG laser using an axial fiber tip.

scholarly journals Relining effects on the push-out shear bond strength of glass fiber posts

2016 ◽  
Vol 45 (4) ◽  
pp. 227-233
Author(s):  
Adriana Rosado Valente ANDRIOLI ◽  
Margareth COUTINHO ◽  
Andréa Araújo de VASCONCELLOS ◽  
Milton Edson MIRANDA
Keyword(s):  
Bond Strength ◽  
Glass Fiber ◽  
Shear Bond Strength ◽  
Resin Cement ◽  
Cervical Region ◽  
Adhesive Resin ◽  
Fiber Posts ◽  
Glass Fiber Posts ◽  
Adhesive Resin Cement ◽  
Push Out

Abstract Introduction The correct use of glass fiber posts in endodontically treated teeth is essential for the clinical success of restorative treatment. Objective This study evaluated the push-out shear bond strength of relined (R) or non-relined (NR) glass fiber posts, cemented with self-adhesive resin cement [RelyXTM U100 (U100)] and conventional resin cement [RelyXTM ARC (ARC)]. Material and method Sixty human single-rooted teeth were endodontically treated and divided into ARC-NR; U100-NR; ARC-R; U100-R groups. The teeth were sectioned into cervical, middle and apical thirds, and subjected to the push-out test. Bond strength was analyzed by the Friedman test; cement and post types were compared by the Mann Whitney test. The pattern of failures was evaluated with digital camera through images at 200x magnification, and was classified as adhesive (at the cement/dentin or cement/post interface), cohesive (cement or post), and mixed failures. Result In ARC-NR, bond strength values were higher in the cervical third; in U100-NR and ARC-R they were similar between the thirds. In U100-R, in the cervical and middle thirds the bond strength values were similar, and there was lower value in the apical third. For non-relined glass fiber posts, the highest mean bond strength values were observed with self-adhesive resin cement. Whereas, relined posts cemented with conventional resin cement had stronger cement layer in comparison with non-relined fiber posts. Conclusion The post relining technique was efficient in ARC-R. ARC-NR and U100-R showed improved bond strength in the cervical region of canal walls. The main failures were adhesive at the cement-post interface.

scholarly journals Influence of the Resin Cement Thickness on the Push-Out Bond Strength of Glass Fiber Posts

2016 ◽  
Vol 27 (5) ◽  
pp. 592-598 ◽  
Author(s):  
Regina Maria Helen-Cot Marcos ◽  
◽  
Gustavo Ross Kinder ◽  
Edson Alfredo ◽  
Tarcisio Quaranta ◽  
...  
Keyword(s):  
Bond Strength ◽  
Glass Fiber ◽  
Resin Composite ◽  
Resin Cement ◽  
Distilled Water ◽  
Cement Layer ◽  
Fiber Posts ◽  
Glass Fiber Posts ◽  
Post Space ◽  
Push Out

Abstract The objective of the present study was to evaluate the influence of resin cement thickness on the bond strength of prefabricated and customized glass fiber posts after storage in distilled water. Thirty human uniradicular roots were treated endodontically. The roots were divided into 3 groups: THIN (thin cement layer) - post space preparation with #0.5 drill and cementation of #0.5 post; THICK (thick cement layer) - post space preparation with #1 drill and cementation of #0.5 post; and CUSTOM (customized cement layer) - post space preparation with #1 drill and cementation of a customized post (#0.5 glass fiber posts customized with resin composite). All posts were luted with self-adhesive resin cement. The push-out test was carried out after storage for 24 h and 90 days in distilled water at 37 °C. The data were analyzed with three-way ANOVA and Tukey's test (a=0.05). Bond strengths were significantly higher for CUSTOM (9.37 MPa), than for THIN (7.85 MPa) and THICK (7.07 MPa), which were statistically similar. Considering the thirds, the bond strength varied in the sequence: apical (7.13 MPa) < middle (8.22 MPa) = coronal (8.94 MPa). Bond strength for 24 h storage was significantly higher (8.80 MPa) than for 90-day storage (7.40 MPa). It may be concluded that the thickness of resin cement influenced the bond strength of glass fiber posts. The customized posts presented higher bond strength. Storage in water for 90 days affected negatively the values of bond strength, especially for thick cement layers in the apical third.

scholarly journals Effect of Sonic Activation on Push-Out Bond Strength of Fiber Post: An In Vitro Study

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5038
Author(s):  
Rizwan Jouhar
Keyword(s):  
Bond Strength ◽  
Testing Machine ◽  
Conventional Technique ◽  
Resin Cement ◽  
Activation Technique ◽  
Fiber Post ◽  
Significant Difference ◽  
Sonic Activation ◽  
Push Out

This study aimed to evaluate the effectiveness of conventional and sonic activation techniques on push-out bond strength of fiber post cemented with two different monomers containing self-adhesive resin cement (SARC). Four groups (n = 19 each) were made based on the type of SARC (Rely X U200 and Panavia SA) and technique (conventional and sonic activation). After placing the fiber post, each root was sectioned into 2 mm coronal, middle, and apical portions, and a push-out bond strength test was performed using a universal testing machine. The least push-out bond strength (13.0 ± 0.9 MPa) was found in Rely X U200 conventional technique and highest with Panavia SA sonic activation technique (15.4 ± 0.9 MPa). A significant difference was found in push-out bond strength at coronal (p = 0.002), middle (p = 0.002), and apical (p = 0.001) root sections using Rely X U200 cement with sonic activation as compared to the conventional technique. However, no difference (p > 0.05) was noticed between conventional and sonic activation techniques in Panavia SA cement at any root level. Sonic activation can be used as an adjunct with a manual technique to increase bond strength. However, it was noted that 10-MDP monomer containing SARC performed well regardless of techniques.

scholarly journals Tensile Strength of Glass Fiber Posts Submitted to Different Surface Treatments

2013 ◽  
Vol 24 (6) ◽  
pp. 626-629 ◽  
Author(s):  
Maria Isabel A. Faria ◽  
Erica Alves Gomes ◽  
Danielle Cristine Messias ◽  
Joao Manoel Silva Filho ◽  
Celso Bernardo Souza Filho ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Glass Fiber ◽  
Testing Machine ◽  
Surface Treatments ◽  
Significance Level ◽  
Fiber Posts ◽  
Group I ◽  
Significant Difference ◽  
Glass Fiber Posts

The aim of this in vitro study was to evaluate the tensile strength of glass fiber posts submitted to different surface treatments. Forty-eight maxillary canines had their crowns sectioned and root canals endodontically treated. The roots were embedded in acrylic resin and distributed into 3 groups according to the surface treatment: Group I: the posts were treated with silane agent for 30 s and adhesive; Group II: the posts were cleaned with alcohol before treatment with silane agent and adhesive; Group III: the posts were submitted to conditioning with 37% phosphoric acid for 30 s before treatment with silane agent and adhesive. Each group was divided into 2 subgroups for adhesive polymerization or not before insertion into the canal: A - adhesive was not light cured and B - adhesive was light cured. All posts were cemented with Panavia F and the samples were subjected to tensile strength test in a universal testing machine at crosshead speed of 1 mm/min. Data were submitted to one-way ANOVA and Tukey's test at 5% significance level. There was statistically significant difference (p<0.01) only between group GIII-B and groups GI-A and GI-B. No significant difference was found among the other groups (p>0.05). It was concluded that the products used for cleaning the posts influenced the retention regardless of adhesive light curing.

scholarly journals Does the Moment of Fiber Post Cutting Influence on the Retention to Root Dentin?

2015 ◽  
Vol 26 (2) ◽  
pp. 141-145 ◽  
Author(s):  
Marcela G. Borges ◽  
André L. Faria-e-Silva ◽  
Paulo C. F. Santos-Filho ◽  
Fernanda P. Silva ◽  
Luís R. M. Martins ◽  
...  
Keyword(s):  
Bond Strength ◽  
Glass Fiber ◽  
Testing Machine ◽  
Resin Cement ◽  
Fiber Post ◽  
Root Canals ◽  
Fiber Posts ◽  
Glass Fiber Posts ◽  
The Moment ◽  
Post Hoc

Despite several advantages associated with pre-fabricated glass-fiber posts, the coronal portion of these posts must be cut to allow their use in various clinical situations. However, cutting the cemented post can generate stress on the bonding interface and affect the bond strength. The aim of this study was to investigate the effect the of fiber post cutting on the bond strength of root canals. Sixty bovine incisor roots were included in resin cylinders with simulated periodontal ligaments. Glass-fiber posts were luted using regular resin cement RelyX ARC (3M ESPE) or self-adhesive cement RelyX Unicem (3M ESPE). The posts were cut prior to cementation, immediately after luting or after building up the core (n=10). After storage for 24 h, the samples were cut and subject to push-out testing using a mechanical testing machine (EMIC DL 2000). Data were analyzed using two-way ANOVA (resin cement x moment of post cutting) and Tukey's post hoc test (α=0.05). The moment of fiber post cutting did not affect the bond strength when Unicem was used. However, the bond strength was reduced when ARC was used and when the post was cut immediately. In conclusion, the moment of fiber post cutting may affect the retention of root canal posts when a regular resin cement is used.

scholarly journals Push-out Bond Strength of Glass Fiber Posts Cemented in Weakened Roots with Different Luting Agents

2016 ◽  
Vol 17 (2) ◽  
pp. 119-124 ◽  
Author(s):  
Lourenço Correr-Sobrinho ◽  
Daniele M da Silveira-Pedrosa ◽  
Luis RM Martins ◽  
Mário AC Sinhoreti ◽  
Manoel D Sousa-Neto ◽  
...  
Keyword(s):  
Bond Strength ◽  
Glass Fiber ◽  
Failure Modes ◽  
Resin Cement ◽  
Root Canals ◽  
Luting Agents ◽  
Fiber Posts ◽  
Luting Agent ◽  
Glass Fiber Posts ◽  
Push Out

ABSTRACT Aim To evaluate the push-out bond strength (BS) of direct anatomic posts (DAPs) and conventional fiber posts (CFPs) cemented with different luting agents in different thirds of flared root canals. Materials and methods A total of 60 human single-rooted canine teeth were transversally sectioned 16 mm from the radicular apex. After endodontic treatment, canals were flared with diamond burs. Samples were divided into six groups according to post type and luting agent: DAP and RelyX U100 (RXU); DAP and RelyX ARC (RXA); DAP and RelyX Luting 2 (RXL); CFP and RXU; CFP and RXA; CFP and RXL. Roots were sectioned transversely into six 1-mm-thick slices. The push-out test was performed and failure modes were observed. Results The DAP groups (7.23 ± 2.05) showed highest BS values (p < 0.05) when compared with CFP (5.93 ± 1.76). RelyX U100 (8.17 ± 1.70) showed higher BS values (p < 0.05) than RXA (6.46 ± 1.38), and RXL (5.10 ± 1.65) showed the lowest values. Bond strength on the apical third was statistically lower (p < 0.05) than that on the other thirds of the root canals. There was a predominance of adhesive failure for all groups. Conclusion The DAPs improved retention in flared root canals, and RXU was the most effective luting agent. The apical third showed the lowest BS values. Clinical significance The relining procedure of fiber posts with composite and the proper selection of luting resin cement are important for increasing bonding effectiveness in flared root canals. How to cite this article da Silveira-Pedrosa DM, Martins LRM, Sinhoreti MAC, Correr-Sobrinho L, Sousa-Neto MD, Costa ED Jr, de F Pedrosa-Filho C, de Carvalho JR Jr. Push-out Bond Strength of Glass Fiber Posts Cemented in Weakened Roots with Different Luting Agents. J Contemp Dent Pract 2016;17(2): 119-124.

scholarly journals Bond strength of glass fiber posts submitted to different luting protocols

2016 ◽  
Vol 31 (2) ◽  
pp. 77
Author(s):  
Fabiano Vieira De Landa ◽  
Jean Soares Miranda ◽  
Rodrigo Furtado De Carvalho ◽  
Estevão Tomomitsu Kimpara ◽  
Fabíola Pessôa Pereira Leite
Keyword(s):  
Bond Strength ◽  
Glass Fiber ◽  
Testing Machine ◽  
Dentinal Tubules ◽  
Fiber Posts ◽  
Cutting Machine ◽  
Glass Fiber Posts ◽  
Glass Fiber Post ◽  
Root Dentin ◽  
Push Out

Objective: evaluate the effect of different luting protocols on the bond strength of glass fiber posts.Methods: Forty human canine teeth were randomly divided into four groups: Relyx U100/Endofill (R+E), Panavia F2.0/EndoFill (P+E), Relyx U100/Sealer 26 (R+S), Panavia F2.0/Sealer 26 (P+S). After the luting procedures, the samples were subjected to thermocycling (6.000 cycles; at 5±1 ºC and 55±1 ºC) and then sectioned in a precision cutting machine (Isomet 1000 Precision Saw) into 4 cuts of 2mm regarding to different deepness: Apical, Medium Apical, Medium Coronal, and Coronal. Next, the cuts were submitted to push-out test in a universal testing machine (EMIC) with load cell of 50N, at crosshead speed of 0.5mm/min.Results: They were obtained according to the different luting deepness (p≥0.05) (MPa): 1) apical – R+E (1.35±1.28), P+E (2.70±0.89), R+S (3.89±0.70), P+S (4.30±1.02); 2) medium apical – R+E (1.38±1.28), P+E (2.98±1.43), R+S (4.02±1.14), P+S (4.49±1.82); 3) medium coronal – R+E (2.46±0.73), P+E (3.72±0.78), R+S (4.85±0.71), P+S (6.14±0.73); 4) coronal R+E (5.59±1.08), P+E (5.74±1.06), R+S (6.71±1.07), P+S (7.40±1.51).Conclusion: There was a relationship between the luting protocol of the glass fiber post and the endodontic cement. Eugenol plays an important role inside the dentinal tubules by interfering negatively in the bond strength to root dentin.

scholarly journals Effect of antioxidants on push-out bond strength of hydrogen peroxide treated glass fiber posts bonded with two types of resin cement

2014 ◽  
Vol 39 (4) ◽  
pp. 303 ◽  
Author(s):  
Maryam Khoroushi ◽  
Hamid Mazaheri ◽  
Pardis Tarighi ◽  
Pouran Samimi ◽  
Navid Khalighinejad
Keyword(s):  
Hydrogen Peroxide ◽  
Bond Strength ◽  
Glass Fiber ◽  
Resin Cement ◽  
Fiber Posts ◽  
Glass Fiber Posts ◽  
Push Out

scholarly journals Effect of Anatomical Customization of the Fiber Post on the Bond Strength of a Self-Adhesive Resin Cement

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Adricyla Teixeira Rocha ◽  
Leticia Machado Gonçalves ◽  
Ana Júlia de Carvalho Vasconcelos ◽  
Etevaldo Matos Maia Filho ◽  
Ceci Nunes Carvalho ◽  
...  
Keyword(s):  
Bond Strength ◽  
Glass Fiber ◽  
Resin Cement ◽  
Control Group ◽  
Fiber Post ◽  
Adhesive Resin ◽  
Fiber Posts ◽  
Glass Fiber Posts ◽  
Adhesive Resin Cement ◽  
Push Out

Aim. The aim of the study was to evaluate, by means of the push-out test, the effect of the anatomical customization of the fiber post on the bond strength of a self-adhesive resin cement. Methods. Twelve endodontically treated, human, upper central incisors were randomly divided into two groups (n=6): control (glass fiber posts cemented with Relyx® U200) and customized (glass fiber posts anatomically customized with translucent composite resin cemented with Relyx U200). The roots were sectioned into three slices, cervical, middle, and apical, and photographed with a digital camera attached to a stereomicroscopic loupe. The images were analyzed by software, for evaluation of the cement line. The slices were subsequently submitted to the push-out test until the post had completely extruded, and the fracture mode was analyzed with a stereomicroscopic loupe. Results. The results showed significant differences between the groups in the different root thirds in relation to the area occupied by air bubbles (p<0.05). Bond strength, when all the thirds are considered, was 8.77 ± 4.89 MPa for the control group and 16.96 ± 4.85 MPa for the customized group. Conclusion. The customized group showed greater bond resistance than the control group and a more uniform cement layer.

scholarly journals The Use of Bulk-Fill Flow in the Customization of Glass Fiber Post

2020 ◽  
Author(s):  
Camila Ferreira Silva ◽  
Victor Mota Martins ◽  
Anahi de Paula Melo ◽  
Laís Carvalho Martins ◽  
Paulo Cesar Freitas Santos-Filho
Keyword(s):  
Bond Strength ◽  
Glass Fiber ◽  
Failure Mode ◽  
Composite Resin ◽  
Testing Machine ◽  
Analysis Data ◽  
Strength Test ◽  
Resin Cement ◽  
Fiber Posts ◽  
Significant Difference

Abstract Objectives The aim of this study is to evaluate the influence of different composite resin in the customization of glass fiber posts (GFPs) on bond strength and failure mode. Materials and Methods Thirty bovine roots were selected. The wall roots were reduced so that each wall had a minimum dentin thickness of 1 mm. Thirty GFPs were divided into three groups (n = 10), which received different types of customization. The first had the GFP relined by bulk-fill flowable composite resin (BF), the second group had the GFP customized by conventional regular composite resin (CR), and the third group was cemented with dual resin cements (DRC), without relining. The root were sectioned, resulting in two 1.0-mm thick slices from cervical root regions only and push-out bond strength test was performed (EMIC, Universal testing machine). To determine failure mode, a stereomicroscope was used at ×40 magnification, with a 2.5D analysis. Statistical Analysis Data were analyzed using two-way ANOVA (α = 0.05) and Tukey’s test. Results BF (9.08 ± 1.9) and CR (9.17 ± 3.00) did not show a statistically significant difference (p = 0.961), regarding the bond strength test values. However, there was a statistically significant difference between DRC (5.44 ± 1.89) and the others (p < 0.05). BF (66.66%) and the CR group (47.61%) presented a predominantly failure mode type 6: mixed between resin cement and composite. While the highest failure index of the DRC group was type 2: adhesive between resin cement and dentin (47.61%). Conclusion BF can be an alternative for the customization of fiber posts, since it presented a similar behavior to the established technique with conventional composites.

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