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Karunakaran J, Thangaraj DN, Mathew S, Kumaravadivel K, Thangavel B. Effect of Various Surface Treatments on the Push-Out Bond Strength of Fiber Posts to Root Dentin. Cureus 2023; 15:e51323. [PMID: 38288172 PMCID: PMC10823890 DOI: 10.7759/cureus.51323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/30/2023] [Indexed: 01/31/2024] Open
Abstract
Background This study aimed to evaluate the effect of various surface treatments on the push-out bond strength of fiber posts to root dentin. Methodology A total of 96 single-rooted premolars were decoronated and obturated and post spaces were prepared for 9 mm. The canals were irrigated with 17% ethylenediaminetetraacetic acid followed by distilled water. The samples were divided into the two following groups based on the type of fiber posts used: Group I - glass fiber post (Reforpost size 1) and Group II: quartz fiber post (Quartzix Added Posts number 1). Further, each group was divided into four subgroups based on the surface treatments (A: no treatment (control); B: silanization; C: 4% titanium tetrafluoride (four minutes) followed by silanization; D: sandblasting followed by silanization). After surface treatments, posts were cemented using self-adhesive resin cement (RelyX U200). Three 2 mm thick slices were obtained and push-out tests were done. Failure modes were analyzed under a stereomicroscope. The surface morphology of the posts was analyzed with a scanning electron microscope. Data were analyzed using a one-way analysis of variance. Results Treating the posts with airborne particle abrasion (sandblasting) followed by silanization showed the highest bond strength. The coronal level of the root showed the highest bond strength compared to the middle and apical levels. Adhesive failures between the resin cement and dentin were found to be the highest. Conclusions Sandblasting followed by silanization produced the highest bond strength. The coronal level of the root showed the highest bond strength. Adhesive failures were the highest followed by mixed failures.
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Affiliation(s)
- Janani Karunakaran
- Conservative Dentistry and Endodontics, Chettinad Dental College and Research Institute, Chennai, IND
| | - Deepa N Thangaraj
- Conservative Dentistry and Endodontics, KSR Institute of Dental Science and Research, Tiruchengode, IND
| | - Sebeena Mathew
- Conservative Dentistry and Endodontics, KSR Institute of Dental Science and Research, Tiruchengode, IND
| | - Karthick Kumaravadivel
- Conservative Dentistry and Endodontics, KSR Institute of Dental Science and Research, Tiruchengode, IND
| | - Boopathi Thangavel
- Conservative Dentistry and Endodontics, KSR Institute of Dental Science and Research, Tiruchengode, IND
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Prawatvatchara W, Angkanawiriyarak S, Klaisiri A, Sriamporn T, Thamrongananskul N. Effect of Aprotic Solvents on the Microtensile Bond Strength of Composite Core and Fiber-Reinforced Composite Posts. Polymers (Basel) 2023; 15:3984. [PMID: 37836032 PMCID: PMC10574831 DOI: 10.3390/polym15193984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 09/30/2023] [Accepted: 10/01/2023] [Indexed: 10/15/2023] Open
Abstract
This investigation evaluated the effects of aprotic solvents, i.e., tetrahydrofuran, pyridine, and morpholine, compared with hydrogen peroxide, on the surfaces of fiber-reinforced composite posts with a composite core based on the microtensile bond strength. In total, 150 FRC Postec Plus posts and 150 D.T. Light-Posts were randomly divided into three groups (non-thermocycling, 5000-cycle, and 10,000-cycle thermocycling groups). Each group was divided into five subgroups according to the post-surface treatment: C, non-treatment group; H2O2, immersed in 35% hydrogen peroxide; THF, immersed in tetrahydrofuran; PY, immersed in pyridine; and MP, immersed in morpholine. The treated specimens were placed in the bottom of a plastic cap and filled with a composite core material in preparation for the microtensile bond test. The data were evaluated using one-way ANOVA and Tukey's test (p < 0.05) as well as an independent t-test (p < 0.05). For the surface roughness, white light interferometry was used for measurement, and the mean surface roughness was analyzed via one-way ANOVA and Tukey's test (p < 0.05). The results showed that, under non-thermocycling conditions, the PY subgroup with D.T. Light-Post had the highest microtensile bond strength, followed by THF, MP, H2O2, and the control groups. For FRC Postec Plus, the PY group had the highest microtensile bond strength, followed by MP, THF, H2O2, and the control groups. Although the thermocycling conditions decreased the microtensile bond strength in all groups, the PY subgroup still had the highest value. An independent t-test revealed that even under all non-thermocycling and 5000- and 10,000-cycle thermocycling conditions, D.T. Light-Post in the PY subgroup displayed significantly higher microtensile bond strengths than FRC Postec Plus in the PY subgroup. While the surface roughness of the fiber-reinforced composite posts showed that the posts treated with pyridine possessed the highest surface roughness for each material type, In conclusion, as an aprotic solvent, pyridine generates the highest microtensile bond strength between the interfaces of composite cores and fiber-reinforced composite posts.
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Affiliation(s)
- Wisarut Prawatvatchara
- Department of Prosthodontics, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand
| | | | - Awiruth Klaisiri
- Division of Restorative Dentistry, Faculty of Dentistry, Thammasat University, Pathumthani 12120, Thailand;
| | - Tool Sriamporn
- Division of Prosthodontics, College of Dental Medicine, Rangsit University, Pathumthani 12000, Thailand;
| | - Niyom Thamrongananskul
- Department of Prosthodontics, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand
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Raj R A, El-Shamy FM, Ajit MN, Roy K, Oak A, Ameer B. Assessment of the Push-Out Bond Strength for Glass Fiber Posts After Different Surface Treatments: An In Vitro Study. Cureus 2023; 15:e41499. [PMID: 37551249 PMCID: PMC10404346 DOI: 10.7759/cureus.41499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 06/30/2023] [Indexed: 08/09/2023] Open
Abstract
AIM The goal of the study was to assess the push-out bond strength of the glass fibre post after different surface treatments. MATERIALS AND METHODS For the purpose of the investigation, 40 mandibular premolars were chosen. After gaining access, the biomechanical preparation was completed using the step-back approach up to a size 40K file, and the canals were sealed using gutta-percha cones and the lateral condensation procedure with AH Plus sealer (epoxide-amine resin pulp canal sealer). Peeso reamers were used to remove the canal fillings, leaving 5mm of gutta-percha apically. Drills included in the package were used to prepare the post spaces so that the posts would fit in their respective post slots. These were attached to self-curing acrylic resin blocks. Fibre posts were split into four groupings of n = 10 each for surface treatment, i.e., control, hydrogen fluoride, sandblasting, and hydrogen peroxide. The cementation of posts was done by utilising dual-cure resin cement. Two millimetres of the anatomical crown were removed from each sample. Each sample's 1-mm cervical segment was taken utilising the isotope from the remaining coronal area. To perform a push-out test, at the rate of 0.5mm/min of the crosshead, every sample was inserted into a universal testing device. Each post's dislodge force from the pre-set post spacing was measured. Statistics were utilised to analyse the data. RESULTS Strongest bonds were made by silanization, followed by sandblasting (p value=0.002). The weakest bonds were made by the control group. CONCLUSION The ultimate deduction was that when glass fibre posts underwent various types of surface treatments followed by silanization, it had a significant impact on increasing their strength.
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Affiliation(s)
- Akhila Raj R
- Department of Conservative Dentistry and Endodontics, Amrita School of Dentistry, Amrita Viswavidyapeetham, Amrita Institute of Medical Sciences (AIMS), Kochi, IND
| | | | - Mannur Nikita Ajit
- Department of Conservative Dentistry and Endodontics, SJM Dental College and Hospital, Karnataka, IND
| | - Kasturi Roy
- Department of Conservative Dentistry and Endodontics, Chandra Dental College and Hospital, Barabanki, IND
| | - Anjali Oak
- Department of Conservative Dentistry and Endodontics, College of Dental Sciences and Research Centre, Ahmedabad, IND
| | - Bilal Ameer
- Department of Conservative Dentistry and Endodontics, SJM Dental College and Hospital, Karnataka, IND
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Adwani S, Elsubeihi E, Zebari A, Aljanahi M, Moharamzadeh K, Elbishari H. Effect of Different Silane Coupling Agents on the Bond Strength between Hydrogen Peroxide-Etched Epoxy-Based- Fiber-Reinforced Post and Composite Resin Core. Dent J (Basel) 2023; 11:142. [PMID: 37366665 DOI: 10.3390/dj11060142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/05/2023] [Accepted: 05/10/2023] [Indexed: 06/28/2023] Open
Abstract
The aim of the study was to evaluate the effect of various silane coupling agents on the micro-push-out bond strength between a hydrogen peroxide-etched epoxy-based fiber-reinforced post and composite resin core. Seventy-five cross-linked epoxy-based fiber-reinforced posts were etched with 24% hydrogen peroxide for 10 min. Then they were divided into five groups according to various silane coupling agents and bonded to a composite core. A Universal Testing Machine was utilized to evaluate the push-out bond strength. In addition, all groups' modes of failure were assessed. The push-out bond strength data in MPa were analyzed using ANOVA and a Tukey HSD post hoc test to reveal any difference between the groups. Results revealed that the application of a two-bottle silane coupling agent exhibited the highest bond strength, while the application of a one-bottle silane coupling agent demonstrated the lowest bond strength for a hydrogen peroxide-etched fiber post bonded to a composite core material, which was statistically significant (p < 0.05). The strongest association with the highest bond strength was found with the two-bottle silane coupling agent when compared to the one-bottle. The study highlighted that the application of a silane-coupling agent may affect the bond strength between composite and epoxy-based fiber-reinforced posts.
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Affiliation(s)
- Sarah Adwani
- College of Dentistry, Ajman University, Ajman P.O.Box 346, United Arab Emirates
| | - Emad Elsubeihi
- College of Dentistry, Ajman University, Ajman P.O.Box 346, United Arab Emirates
| | - Ahmad Zebari
- College of Dentistry, Ajman University, Ajman P.O.Box 346, United Arab Emirates
| | - May Aljanahi
- Dubai Dental Hospital, Dubai P.O. Box 505097, United Arab Emirates
| | - Keyvan Moharamzadeh
- Hamdan Bin Mohammed College of Dental Medicine (HBMCDM), Mohammed Bin Rashid University of Medicine and Health Sciences (MBRU), Dubai P.O. Box 505055, United Arab Emirates
| | - Haitham Elbishari
- Hamdan Bin Mohammed College of Dental Medicine (HBMCDM), Mohammed Bin Rashid University of Medicine and Health Sciences (MBRU), Dubai P.O. Box 505055, United Arab Emirates
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Wu H, Qin X, Huang X, Kaewunruen S. Engineering, Mechanical and Dynamic Properties of Basalt Fiber Reinforced Concrete. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16020623. [PMID: 36676360 PMCID: PMC9865098 DOI: 10.3390/ma16020623] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/30/2022] [Accepted: 01/04/2023] [Indexed: 06/12/2023]
Abstract
This study investigates the engineering and mechanical properties of basalt fiber-reinforced (FRF) concrete, giving special attention to residual flexural strength and dynamic modal parameters. These properties, which have not been thoroughly investigated elsewhere, are a precursor to structural design applications for dynamic compliant structures (i.e., bridges, offshore platforms, railways, and airport pavement). Accordingly, the standard notched flexural tests have been carried out to assess the basalt fiber-reinforced concrete's residual flexural strength with an additional 0.125%, 0.25%, 0.375%, and 0.5% of volume fraction of basalt fiber. In addition, dynamic modal tests were then conducted to determine the dynamic modulus of elasticity (MOE) and damping of the FRF concrete beams. The results indicate that concrete's toughness and crack resistance performance are significantly improved with added fiber in basalt fiber reinforced concrete, and the optimum fiber content is 0.25%. It also exhibits the highest increment of compressive strength of 4.48% and a dynamic MOE of 13.83%. New insights reveal that although the residual flexural performance gradually improved with the addition of basalt fiber, the damping ratio had an insignificant change.
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Bellan MC, da Cunha P, Colombino A, Bittencourt HR, Mota EG, Borges GA, Spohr AM. Retention of Manually or CAD/CAM-customized Fiberglass Posts Luted to Enlarged Root Canals with Different Resin Cements. Oper Dent 2022; 47:449-460. [PMID: 35917252 DOI: 10.2341/21-094-l] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/06/2021] [Indexed: 11/23/2022]
Abstract
The aim of this laboratory study was to evaluate the pull-out force of a prefabricated fiberglass post (PP), relined fiberglass post (RP), or milled fiberglass post (MP) luted with Multilink N (MN), RelyX Unicem 2 (RXU2) or RelyX Ultimate (RU) to enlarged root canals. The thickness of the resin cements and the presence of voids in the resin cement film were observed. The root canals of 90 bovine incisors were enlarged, endodontically treated, and randomly divided into 9 groups (n=10) according to the post type and resin cement. The specimens were scanned using micro-CT to analyze the thickness of the resin cement and the presence of voids. The specimens were submitted to mechanical cyclic loading (500,000 cycles at 50 N load) and subjected to pull-out force testing. Two-way ANOVA and Tukey's test analyzed the pull-out force and resin cement thickness data. Kruskal-Wallis and Bonferroni tests analyzed the void scores. The interaction between factors (post x resin cement) was significant (p=0.0001) for the pull-out force. Higher pull-out forces were obtained for RP and MP compared to PP. The post factor was significant (p=0.0001) for resin cement thickness, which was higher for PP (1054 μm), followed by MP (301 μm) and RP (194 μm). More void formation occurred for PP, being less for RP, differing significantly among the posts. Post customization (RP and MP) decreased resin cement thickness and void formation, favoring a higher pull-out force. Resin cements requiring an adhesive application (MN and RU) favored higher pull-out force than self-adhesive resin cement (RXU2).
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Affiliation(s)
- M C Bellan
- Mariá Cortina Bellan, DDS, MS, PhD, Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Pfjs da Cunha
- Patrícia Fernandes Jerzewski Sotero da Cunha, DDS, MsC, Private Practice, Porto, Alegre, Brazil
| | - Acl Colombino
- Ana Caroline Lima Colombino, DDS, Department of Restorative Dentistry, Uberaba University,Uberaba, Brazil
| | - H R Bittencourt
- Hélio Radke Bittencourt, MsC, PhD, Polytechnic School, Pontifical Catholic of Rio Grande do Sul, Porto Alegre, Brazil
| | - E G Mota
- Eduardo Gonçalves Mota, DDS, MS, PhD, Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - G A Borges
- Gilberto Antonio Borges, DDS, MS, PhD, Department of Restorative Dentistry, School of Dentistry, Uberaba University, Uberaba, Brazil
| | - A M Spohr
- *Ana Maria Spohr, DDS, MS, PhD, Pontifical Catholic University of Rio Grande do Sul Porto Alegre, Rio Grande do Sul, Brazil
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Penelas AG, da Silva EM, Fedozzi JM, Alves AC, Orem PRB, Poskus LT, Feitosa VP, Guimarães JGA. Glass fiber posts relining: can composite opacity influence retention to root canal dentin? Odontology 2022; 110:569-576. [PMID: 35230573 DOI: 10.1007/s10266-022-00693-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 02/04/2022] [Indexed: 11/28/2022]
Abstract
This study aimed at evaluating the influence of glass-fiber post (GFP) relining with composites of different opacities on resin cement layer thickness (CLT), bond strength (BS) to root dentin, and resin cement degree of conversion (DC%). Standardized roots of 52 bovine incisors had their canals prepared and were distributed into 4 groups (n = 10 for CLT and BS; n = 3 for DC%) according to the post used: WP3 (Control)-Whitepost DC3; groups DE, EN and TR-Whitepost DC0.5 relined, respectively, with dentin, enamel, and translucent shade composites. After cementation, specimens were sectioned into six 1.0 mm-thick discs that were submitted to push-out BS test. CLT and failure pattern were evaluated using a stereomicroscope and DC% by micro-Raman spectroscopy. Data were analyzed by two-way ANOVA and Tukey test (α = 0.05). The control group showed greater CLT than all relined groups (p < 0.05), which did not differ from each other (p > 0.05). Groups relined with low opacity composites (TR; EN) showed the highest BS and DC% means (p < 0.05). BS was not different among root thirds (p > 0.05), while DC% decreased from cervical to apical third (p < 0.05). Adhesive failures between cement and dentin were predominant, except for group DE with frequent mixed failures. It could be concluded that composite opacity did not influence CLT, which was thinner when GFP were relined and that relining GFP with lower opacity composites led to higher BS and DC%.
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Affiliation(s)
| | | | - Julia Mattos Fedozzi
- School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Amanda Cypriano Alves
- School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | | | - Laiza Tatiana Poskus
- School of Dentistry, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
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Chemical analysis of irradiated root dentin and its interaction with resin cements. Clin Oral Investig 2022; 26:4315-4325. [PMID: 35149905 DOI: 10.1007/s00784-022-04395-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 01/29/2022] [Indexed: 11/03/2022]
Abstract
OBJECTIVES To investigate the chemical changes in root dentin submitted to ionizing radiation and how it affects the interaction with resin cements. MATERIALS AND METHODS Forty human premolars were randomly divided into two groups (n = 20): non-irradiated and irradiated. They were randomly subdivided according to the type of resin cement (n = 10): conventional (RelyX ARC, 3 M ESPE) or self-adhesive (RelyX U200, 3 M ESPE). After cementation of the fiberglass posts, the roots were sectioned to be analyzed by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and confocal laser scanning microscopy (CLSM). The data obtained from FTIR and Raman were analyzed using two-way ANOVA followed Tukey's test (α = 0.05). For CLSM, a descriptive analysis was performed. RESULTS In the FTIR, there was a significant difference between the non-irradiated and irradiated groups for phosphate (p = 0.011), carbonate (p < 0.001), amide III (p = 0.038), and carbonate/mineral ratio (p < 0.001). Regarding the root third, there was a difference for amide I (p = 0.002), mineral/matrix ratio (p = 0.001), and amide I/CH2 (p = 0.026) between the cervical and the others. Raman spectroscopy revealed no difference between groups for 961/1458 cm-1 in the diffusion zone. CLSM showed a different interaction pattern for the two cements with the irradiated dentin from the cervical third. CONCLUSIONS Ionizing radiation altered the chemical composition of root dentin, especially in the cervical third. The resin cements showed less interaction with the irradiated root dentin. CLINICAL RELEVANCE As radiotherapy alters the chemical composition of root dentin, the interaction of resin cement with dentin can compromise the success of rehabilitation with fiberglass posts.
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Effect of Glass Fiber Post Surface Treatment on Bond Strength of a Self-Adhesive Resin Cement: An "In Vitro" Study. Int J Dent 2021; 2021:8856657. [PMID: 34475956 PMCID: PMC8407984 DOI: 10.1155/2021/8856657] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 08/11/2021] [Indexed: 11/18/2022] Open
Abstract
Objective This study evaluated the influence of different mechanical and chemical surface treatments alone and combined with silane on the bond strength (BS) of glass fiber posts (GFPs) using self-adhesive resin cement. Methods Eighty-four single-rooted bovine teeth (six groups, n = 14) were submitted to BS analysis after GFP cementation. The treatments applied in the studied groups were no surface treatment (control), silane (S), 24% hydrogen peroxide (PER), 24% hydrogen peroxide and silane (PER + SIL), blasting with 50 μm aluminum oxide particles (BLAST), and blasting with 50 μm aluminum oxide particles and silane (BLAST + SIL). Results BS differed significantly among groups (p < 0.001). It was higher in the SIL (10.5 ± 3.5 MPa), BLAST + SIL (11.5 ± 3.2 MPa), and PER + SIL (11.6 ± 4.6 MPa) groups than in the control (6.5 ± 2.9 MPa), BLAST (8.6 ± 4.0 MPa), and PER (7.1 ± 2.8 MPa) groups, with no significant difference among groups receiving silanization. Cement post adhesive failure was more common in the SIL, BLAST, and PER + SIL groups, and cement-dentin adhesive failure was more common in the control, BLAST + SIL, and PER groups. Conclusion These results show that silane application alone increases BS.
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Alshahrani A, Albaqami M, Naji Z, Al-Khunein Y, Alsubaie K, Alqahtani A, Al-Thobity AM. Impact of different surface treatment methods on bond strength between fiber post and composite core material. Saudi Dent J 2021; 33:334-341. [PMID: 34434036 PMCID: PMC8376674 DOI: 10.1016/j.sdentj.2020.03.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 03/11/2020] [Accepted: 03/11/2020] [Indexed: 12/03/2022] Open
Abstract
PURPOSE To assess the impact of different surface treatments on the push-out bond strength between fiber post and a composite resin core material. MATERIAL AND METHODS Seventy-two glass-fiber posts were randomly assigned into six groups according to the method of surface treatment: Control (no treatment), silane, sandblasting, hydrofluoric acid, hydrogen peroxide, and hydrogen peroxide with sandblasting. Two posts from each group were inspected under a scanning electron microscope to assess the surface modifications and 10 posts were employed for the push-out test. Each post was placed vertically in the middle of a cylindrical putty matrix and a dual-cure composite resin material was applied for core build-up. Two discs of each specimen were cut using a low-speed diamond saw (total 120 discs). The push-out test was executed using a universal testing machine at a crosshead speed of 0.5 mm/min. Statistical analysis was performed using one-way ANOVA and Tukey's test (p ≤ 0.05). The mode of failure of each disc was evaluated under SEM. RESULTS The sandblasting and hydrofluoric acid groups presented significantly higher bond strength than control and hydrogen peroxide groups. The hydrogen peroxide groups exhibited significantly the lowest bond strength of all groups. There was no significant difference between the control and silane groups. All groups showed predominantly adhesive failure except the hydrogen peroxide with sandblasting, where the cohesive failure of the post was predominant. CONCLUSIONS Sandblasting and hydrofluoric acid surface treatments demonstrated superior results to silane and hydrogen peroxide. The combined method of hydrogen peroxide and sandblasting could weaken the fiber post and lead to clinical fractures.
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Affiliation(s)
- Abdullah Alshahrani
- Prosthetic Dental Sciences Department, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Muthyib Albaqami
- College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Zeyad Naji
- College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | | | - Khalid Alsubaie
- King Abdulaziz Dental Center, National Guard Health Affairs, Riyadh, Saudi Arabia
| | - Abdulaziz Alqahtani
- Prosthetic Dental Sciences Department, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Ahmad M. Al-Thobity
- Substitutive Dental Sciences Department, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
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Push-Out Bond Strength Evaluation of Fiber-Reinforced Composite Resin Post Cemented with Self-Adhesive Resin Cement Using Different Adhesive Bonding Systems. MATERIALS 2021; 14:ma14133639. [PMID: 34209908 PMCID: PMC8269643 DOI: 10.3390/ma14133639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 06/21/2021] [Accepted: 06/25/2021] [Indexed: 11/17/2022]
Abstract
The purpose of this in vitro study was to evaluate the push-out bond strength of fiber-reinforced resin posts using self-adhesive cements with different adhesive systems. A total of 50 single-rooted human maxillary premolars with fully developed apices and 15–16 mm straight root canals were selected. The teeth were divided into 10 groups with coronal and apical parts according to the adhesive bonding system and luting material used: one universal adhesive with MDP-containing self-adhesive resin cement; another universal adhesive with MDP-containing self-adhesive resin cement; universal primer with MDP-containing self-adhesive resin cement; universal primer with dual-cure resin cement; MDP-containing self-adhesive resin cement only (Control). Each specimen was subjected to a fatigue load of 600,000 cycles using a chewing simulator with sliding movement and cut horizontally for push-out bond strength testing. Statistical evaluation consisted of a one-way ANOVA test using SPSS v23.0. The highest bond strength (7.05 MPa) was obtained in the coronal part of the Single Bond universal group treated with MDP-containing self-adhesive resin cement and the lowest strength (4.77 MPa) was observed in apical part of MDP-containing self-adhesive resin cement group (Control). However, the one-way ANOVA results showed no significant difference between all 10 groups (p > 0.05). The self-adhesive cement without adhesive bonding showed no statistically different value compared to self-adhesive cements with adhesive bonding.
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Kürkçüoğlu I, Küçükeşmen HC, Ozkir SE, Yilmaz B. Effect of surface treatment on roughness and bond strength of
CAD‐CAM
multidirectional glass fiber‐reinforced composite resin used for implant‐supported prostheses. POLYM INT 2021. [DOI: 10.1002/pi.6173] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Işın Kürkçüoğlu
- Faculty of Dentistry, Department of Prosthodontics Suleyman Demirel University Isparta Turkey
| | - Hakkı Cenker Küçükeşmen
- Faculty of Dentistry, Department of Prosthodontics Suleyman Demirel University Isparta Turkey
| | - Serhat Emre Ozkir
- Faculty of Dentistry, Department of Prosthodontics Osmangazi University Eskişehir Turkey
| | - Burak Yilmaz
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine University of Bern Bern Switzerland
- Department of Restorative, Preventive and Pediatric Dentistry, School of Dental Medicine University of Bern Bern Switzerland
- Division of Restorative and Prosthetic Dentistry The Ohio State University Columbus OH USA
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Silva CF, Martins VM, Melo ADP, Martins LC, Santos-Filho PCF. The Use of Bulk-Fill Flow in the Customization of Glass Fiber Post. Eur J Dent 2020; 15:139-144. [PMID: 32932532 PMCID: PMC7902113 DOI: 10.1055/s-0040-1716599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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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Affiliation(s)
- Camila Ferreira Silva
- Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Victor Mota Martins
- Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Anahi de Paula Melo
- Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Laís Carvalho Martins
- Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Paulo Cesar Freitas Santos-Filho
- Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil
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14
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Effects of Surface Treatments of Glass Fiber-Reinforced Post on Bond Strength to Root Dentine: A Systematic Review. MATERIALS 2020; 13:ma13081967. [PMID: 32340106 PMCID: PMC7215824 DOI: 10.3390/ma13081967] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 04/18/2020] [Accepted: 04/20/2020] [Indexed: 11/30/2022]
Abstract
The objective of this systematic review was to determine the influence of surface treatment of glass fiber posts on bond strength to dentine. Laboratory studies were searched in MEDLINE, PubMed, Embase, PubMed Central, Scopus, and Web of Science search engine. All authors interdependently screened all identified articles for eligibility. The included studies were assessed for bias. Because of the considerable heterogeneity of the studies, a meta-analysis was not possible. Twelve articles were found eligible and included in the review. An assessment of the risk of bias in the included studies provided a result that classified the studies as low, medium, and high risk of bias. The available evidence indicated that the coronal region of the root canal bonded better to the glass fiber post than apical regions. Phosphoric acid, hydrogen peroxide, and silane application enhance post’s retentiveness. In light of the current evidence, surface treatment strategies increase the bond strength of glass fiber post to dentine. However, recommendations for standardized testing methods and reporting of future clinical studies are required to maintain clinically relevant information and to understand the effects of various surface treatment of glass fiber post and their bond strength with dentine walls of the root canal.
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15
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Adhesion between Epoxy Resin-Based Fiber Post and Dental Core Resin Improved by Non-Thermal Atmospheric Pressure Plasma. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10072535] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The purpose of the study was to evaluate the adhesion between dental core resin and epoxy resin-based fiber post after treatment with non-thermal atmospheric pressure plasma (NTAPP) and compare with conventional methods of epoxy resin-based fiber post treatments. Contact angle was measured on the surface of epoxy resin before and after NTAPP treatment and X-ray photoelectron spectroscopy was used to analyze the surface chemistry. Finally, two shear bond strength tests were carried out; shear bond strength between core resin and epoxy resin for comparison between NTAPP treated and untreated sample, and push-out shear bond strength between core resin and NTAPP treated commercially available epoxy resin-based fiber post for comparison between NTAPP treated samples with conventionally treated samples. Contact angle on the surface of epoxy resin generally decreased with increasing NTAPP treatment time with presence of surface chemical changes. Also, there was significantly higher shear bond strength and push-out shear bond strength between epoxy resin and core resin for NTAPP treated epoxy resin, even to the conventionally treated epoxy resin-based fiber post with hydrofluoric acid or silane. In conclusion, new technology of NTAPP has potential for application on the epoxy resin-based fiber post to improve endodontic restoration success rate.
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16
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Carvalho MFFD, Yamauti M, Magalhães CSD, Bicalho AA, Soares CJ, Moreira AN. Effect of ethanol-wet bonding on porosity and retention of fiberglass post to root dentin. Braz Oral Res 2020; 34:e020. [PMID: 32236317 DOI: 10.1590/1807-3107bor-2020.vol34.0020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 12/16/2019] [Indexed: 11/22/2022] Open
Abstract
This in vitro study aimed to assess the effects of different pretreatments used to adapt glass-fiber posts cemented to root canals with different resin cements, regarding porosity percentage and bond strength. Twelve bovine incisor roots were prepared with Largo drills. After post space preparation, the specimens were randomized into two types of pretreatment groups (n = 3): water-wet bonding and ethanol-wet bonding. After the post were cemented, the roots were stored in 100% humidity at room temperature for 7 days. The samples were scanned by microcomputed tomography (micro-CT). Images were reconstructed by NRecon software, and CTAn software was used to analyze the porosity percentage (%) at the luting interface. Evaluation of the push-out bond strength was performed by serially cutting the roots, and submitting the slices to testing. Additionally, the resin cement post-gel shrinkage values (%) were measured using the strain-gauge method (n = 10). Data were analyzed by two-way ANOVA, Tukey's test and Student's t test (a = 0.05). The roots prepared with ethanol-wet bonding using RelyX™ U200 had significantly lower porosity in the coronal and apical thirds (p < 0.05). The group prepared with ethanol-wet bonding using RelyX™ ARC presented better bond strength results in the coronal and apical thirds (p < 0.05). RelyX™ ARC (0.97%) produced a higher post-gel shrinkage value than RelyX™ U200 (0.77%). Canals pretreated with ethanol-wet bonding presented better outcomes in regard to porosity percentage and push-out bond strength.
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Affiliation(s)
| | - Monica Yamauti
- Universidade Federal de Minas Gerais - UFMG, School of Dentistry, Department of Restorative Dentistry, Belo Horizonte, MG, Brazil
| | - Cláudia Silami de Magalhães
- Universidade Federal de Minas Gerais - UFMG, School of Dentistry, Department of Restorative Dentistry, Belo Horizonte, MG, Brazil
| | - Aline Aredes Bicalho
- Universidade Federal de Uberlândia - UFU, Technical Health School, Uberlândia, MG, Brazil
| | - Carlos José Soares
- Universidade Federal de Uberléndia - UFU, School of Dentistry, Department of Operative Dentistry and Dental Materials, Uberléndia, MG, Brazil
| | - Allyson Nogueira Moreira
- Universidade Federal de Minas Gerais - UFMG, School of Dentistry, Department of Restorative Dentistry, Belo Horizonte, Minas Gerais, Brazil
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17
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Cadore-Rodrigues AC, Guilardi LF, Wandscher VF, Pereira GKR, Valandro LF, Rippe MP. Surface treatments of a glass-fiber reinforced composite: Effect on the adhesion to a composite resin. J Prosthodont Res 2019; 64:301-306. [PMID: 31718959 DOI: 10.1016/j.jpor.2019.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 07/07/2019] [Accepted: 09/03/2019] [Indexed: 10/25/2022]
Abstract
PURPOSE To compare the effect of different surface treatments (pre-treatments and bonding agents) on the bond strength between glass-fiber post and composite resin, and the topographic alterations of the treated post surface. METHODS Thirty-six glass-fiber blocks (12mm×10mm×8mm) were specifically manufactured for this study and randomly assigned into 12 groups considering two factors: 'pre-treatments' (-cleaning with 70% alcohol; air-abrasion with silica-coated aluminum oxide particles; 35% hydrogen peroxide) and type of 'bonding agent' (no bonding agent; application of Monobond Plus; RelyX Ceramic Primer; Single Bond Universal). After that, 6 cylindrical templates (1mm high×1mm Ø) were fixed on each block, filled with composite resin (n=18) and light-cured. Specimens were stored under 37°C for 24h and microshear tests (wire loop Ø=0.2mm) were performed. Topographic, roughness and failure analyses were also performed. RESULTS Different surface pre-treatments led to different topographic and roughness alterations; a higher surface alteration was noted after silica particles air-abrasion, while a slight surface alteration in the hydrogen peroxide group and a smooth pattern were observed in the cleaning group. The factors 'pre-treatments' (p<0.05), 'bonding agent' (p<0.05) and their interaction (p<0.05) influenced the bond strength. Silica coating, apart from bonding agent application, or Single Bond Universal application without pre-treatment promoted the highest bond values. The main failure type was adhesive at the resin-post interface. CONCLUSIONS In terms of pre-treatments, silica coating promotes the best bonding performance, but pre-treatments can be dispensable when applying Single Bond Universal.
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Affiliation(s)
- Ana C Cadore-Rodrigues
- Post-Graduate Program in Oral Science, Division of Prosthetic Dentistry, Federal University of Santa Maria, Marechal Floriano Peixoto Street 1184, 97015-372 Santa Maria, Rio Grande do Sul State, Brazil.
| | - Luís F Guilardi
- Post-Graduate Program in Oral Science, Division of Prosthetic Dentistry, Federal University of Santa Maria, Marechal Floriano Peixoto Street 1184, 97015-372 Santa Maria, Rio Grande do Sul State, Brazil.
| | - Vinicius F Wandscher
- Faculty of Odontology, Prosthodontics Unit, Franciscan University, Silva Jardim Street 1175, 97010-491 Santa Maria, Rio Grande do Sul State, Brazil.
| | - Gabriel K R Pereira
- Post-Graduate Program in Dentistry, School of Dentistry, Meridional Faculty - IMED, Senador Pinheiro Street 304, 99070-220 Passo Fundo, Rio Grande do Sul State, Brazil.
| | - Luiz F Valandro
- Post-Graduate Program in Oral Science, Division of Prosthetic Dentistry, Federal University of Santa Maria, Marechal Floriano Peixoto Street 1184, 97015-372 Santa Maria, Rio Grande do Sul State, Brazil.
| | - Marília P Rippe
- Post-Graduate Program in Oral Science, Division of Prosthetic Dentistry, Federal University of Santa Maria, Marechal Floriano Peixoto Street 1184, 97015-372 Santa Maria, Rio Grande do Sul State, Brazil.
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18
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Figueiredo FE, Santos RC, Silva AS, Valdívia AD, Oliveira-Neto LA, Griza S, Soares CJ, Faria-e-Silva AL. Ferrule Design Does Not Affect the Biomechanical Behavior of Anterior Teeth Under Mechanical Fatigue: An In Vitro Evaluation. Oper Dent 2019; 44:273-280. [DOI: 10.2341/17-296-l] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
Objectives:
To investigate the survival and failure mode of fiber-post resin restorations over preparations with different ferrule designs when submitted to a fatigue load test.
Methods and Materials:
Fifty bovine incisors were selected and divided into five groups (n=10) according to ferrule design: a no-ferrule group, a 2-mm circumferential ferrule group, a 2-mm buccal ferrule group, a 2-mm lingual ferrule group, and a 2-mm buccal and lingual ferrule group. The fiberglass post was cemented and the composite core was built up and prepared, followed by cementation of a full composite crown. The samples were subjected to a cyclic fatigue test with loading applicator at 135°; a staircase approach was used until fracture. Survival (cycles to fracture) and failure modes were recorded. Survival data were analyzed with the log-rank test, while Kruskal-Wallis and Fisher exact tests were used to analyze failure mode data (α=0.05).
Results:
The median number of cycles to fracture ranged from 215,000 to 236,153. The log-rank test showed no statistically significant difference in survival rates among the groups (p=0.82). Regarding failure mode, three types were observed: I, post and/or core fracture; II, root fracture in the cervical third; and III, root fracture in the middle third. No statistical difference was observed among the groups (Kruskal-Wallis test, p=0.147).
Conclusion:
The ferrule design had no effect on fatigue resistance or failure mode of endodontically treated incisor teeth restored with a fiber post, composite core buildup, and composite crown.
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Affiliation(s)
| | - RC Santos
- Renan C Santos, BS student, Department of Materials Science and Engineering, Federal University of Sergipe, São Cristóvão, Brazil
| | - AS Silva
- Abraão S Silva, PhD student, Program in Materials Science and Engineering, Federal University of Sergipe, São Cristóvão, Brazil
| | - AD Valdívia
- Andrea D Valdívia, DDS, MS, PhD student, School of Dentistry, Operative Dentistry and Dental Materials, Federal University of Uberlândia, Minas Gerais, Brazil
| | - LA Oliveira-Neto
- Luiz A Oliveira-Neto, PhD, Department of Dentistry, Federal University of Sergipe, Lagarto, Brazil
| | - S Griza
- Sandro Griza, PhD, Department of Materials Science and Engineering, Federal University of Sergipe, São Cristóivão, Brazil
| | - CJ Soares
- Carlos J Soares, DDS, MS, PhD, School of Dentistry, Federal University of Uberlândia, Operative Dentistry and Dental Materials, Minas Gerais, Brazil
| | - AL Faria-e-Silva
- Andre L Faria-e-Silva, DDS, MD, PhD, Federal University of Sergipe, Department of Dentistry, Aracaju, Brazil
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19
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Soares CJ, Rodrigues MDP, Faria-e-Silva AL, Santos-Filho PCF, Veríssimo C, Kim HC, Versluis A. How biomechanics can affect the endodontic treated teeth and their restorative procedures? Braz Oral Res 2018; 32:e76. [DOI: 10.1590/1807-3107bor-2018.vol32.0076] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Accepted: 06/13/2018] [Indexed: 11/22/2022] Open
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20
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Al-Qahtani AS, AlZain SA, AlHamdan EM, Tulbah HI, Al Alsheikh HM, Naseem M, Vohra F. A comparative evaluation of the effect of phototherapy of fiber post on its bond strength to dental composite. Photodiagnosis Photodyn Ther 2018; 24:228-231. [PMID: 30172074 DOI: 10.1016/j.pdpdt.2018.08.016] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 08/20/2018] [Accepted: 08/27/2018] [Indexed: 10/28/2022]
Abstract
The aim of the study was to evaluate the effect of diode laser as a phototherapy on surface treatment of fiber post and its bond strength to resin core build-up material. In this in-vitro study fifty fiber post of 1 mm tip-diameter and 20 mm length were used. The posts were mounted and randomly divided into 5 groups (n = 10) according to different surface treatment methods i.e. Group 1: Control, Group 2: Application of 37% Phosphoric Acid, Group 3: Treated with 40% H2O2, Group 4: Sandblasted with 50 μm aluminium oxide particles and Group 5: treated with diode laser. In all specimens including control, a cylinder of resin composite around the fiber post was made. All Specimens were mounted in a universal testing machine. Push-out test was performed and bond strengths were calculated. Using analysis of variance (ANOVA) and post hoc Tukey multiple comparisons test, means of push out bond strength were compared among the study groups. The highest bond strength was shown among Sandblasted [50 μm, Aluminium Oxide (Al2O3)] group [139.86] and the lowest push-out bond strength was observed in Control specimens [75.73]. The bond strength values of fiber post treated with Diode laser [100.81] and 40% H2O2 [105.64] were comparable.
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Affiliation(s)
- Amal Saeed Al-Qahtani
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, P.O.Box- 60169, Riyadh 11545, Saudi Arabia.
| | - Sahar Asaad AlZain
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, P.O.Box- 60169, Riyadh 11545, Saudi Arabia.
| | - Eman Mohammed AlHamdan
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, P.O.Box- 60169, Riyadh 11545, Saudi Arabia.
| | - Huda Ismail Tulbah
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, P.O.Box- 60169, Riyadh 11545, Saudi Arabia.
| | - Hana Mohammed Al Alsheikh
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, P.O.Box- 60169, Riyadh 11545, Saudi Arabia.
| | | | - Fahim Vohra
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, P.O.Box- 60169, Riyadh 11545, Saudi Arabia.
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21
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Garcia PP, da Costa RG, Garcia AV, Gonzaga CC, da Cunha LF, Rezende CEE, Correr GM. Effect of surface treatments on the bond strength of CAD/CAM fiberglass posts. J Clin Exp Dent 2018; 10:e591-e597. [PMID: 29930778 PMCID: PMC6005091 DOI: 10.4317/jced.54904] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 04/26/2018] [Indexed: 11/25/2022] Open
Abstract
Background There is no ideal protocol for the surface treatment of fiber posts, especially when using a computer-aided design/computer-aided manufacturing (CAD/CAM) experimental fiberglass block. The purpose of this study was to evaluate the bond strength of a CAD/CAM customized glass fiber post and core after applying different surface treatment techniques. Material and Methods Forty premolars were prepared to receive a customized CAD/CAM glass-fiber post and core obtained from an experimental block of glass fiber and epoxy resin. The specimens were randomly distributed in 4 groups (n=10) according to the post and core surface treatment: ETH - 70% ethanol; HP - 24% hydrogen peroxide for 1 minute; ETH/S - 70% ethanol + silane; HP/S - 24% hydrogen peroxide + silane. The universal adhesive containing silane was applied on the posts and prepared post spaces in all groups. The posts were cemented using dual cure resin cement. The specimens were stored in distilled water at 37°C for 24 h, cut (two slices of 1 mm for each root third - coronal, middle, and apical) and subjected to push-out test (0.5 mm/min). Data was subjected to two-way ANOVA (surface treatment and root third) and Tukey’s test (α=0,05). Results There was no significant difference of bond strength values among groups, regardless the surface treatment (p >0.05). There was significant difference on bond strength values for the different root thirds (p<0.05) (coronal>middle=apical). Conclusions The different surface treatment and application of additional silane in the CAD/CAM customized glass-fiber post and core does not interfere on bond strength values. The root dentin third interfered on the bond strength, with higher values for the coronal third. Key words:Post and core technique, cad/cam, shear strength, hydrogen peroxide.
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Affiliation(s)
- Paula-Pontes Garcia
- Graduate Student, Graduate Program in Dentistry, Universidade Positivo, Rua Pedro Viriato Parigot de Souza, 5300, Curitiba, PR, Brazil
| | - Rogério-Goulart da Costa
- Professor, Dental Prosthesis, Federal Institute for Science and Technology of Paraná, Rua João Negrão 1258, Curitiba, PR, Brazil
| | - André-Vivan Garcia
- Graduate Student, Graduate Program in Dentistry, Universidade Positivo, Rua Pedro Viriato Parigot de Souza, 5300, Curitiba, PR, Brazil
| | - Carla-Castiglia Gonzaga
- PhD Professor, Graduate Program in Dentistry, Universidade Positivo, Rua Pedro Viriato Parigot de Souza, 5300, Curitiba, PR, Brazil
| | - Leonardo-Fernandes da Cunha
- PhD Professor, Graduate Program in Dentistry, Universidade Positivo, Rua Pedro Viriato Parigot de Souza, 5300, Curitiba, PR, Brazil
| | - Carlos-Eduardo-Edwards Rezende
- PhD Professor, Graduate Program in Dentistry, Universidade Positivo, Rua Pedro Viriato Parigot de Souza, 5300, Curitiba, PR, Brazil
| | - Gisele-Maria Correr
- PhD Professor, Graduate Program in Dentistry, Universidade Positivo, Rua Pedro Viriato Parigot de Souza, 5300, Curitiba, PR, Brazil
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22
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Shafiei F, Saadat M, Jowkar Z. Effect of laser heat treatment on Pull-out bond strength of fiber posts treated with different silanes. J Clin Exp Dent 2018; 10:e413-e418. [PMID: 29849963 PMCID: PMC5971068 DOI: 10.4317/jced.54145] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 03/21/2018] [Indexed: 11/12/2022] Open
Abstract
Background This study evaluated the effect of three different silanes and post-silanization treatments on the retentive strength of fiber posts luted with an etch-and-rinse resin cement. Material and Methods One hundred intact maxillary central incisors were randomly divided into 10 groups after endodontic treatment and post space preparation (n=10). The fiber posts were etched using 24% hydrogen peroxide. Posts of the control group did not receive silane. In nine experimental groups, each of the three silanes used, Scotchbond Universal adhesive, Bis-Silane and Porcelain Primer, was subjected to three treatments: air-drying at 25°C, warm air-drying and CO2 laser heat treatment. After cementation of the treated posts using One-Step Plus/Duo-Link cement, the specimens were stored for one weak and then subjected to pull-out bond strength (PBS) testing. The data in Newton (N) were analyzed using two-way ANOVA and Tukey tests (α=0.05). Results PBS was significantly affected by silane type and post-silanization treatment (p<0.001). The interaction of the two factors was not statistically significant (p=0.15). The effect of Porcelain Primer on PBS was significantly higher than those of universal adhesive (p<0.001) and Bis-Silane (p=0.01), with similar results for the two latter. Warm air-drying and laser treatment significantly increased PBS (p<0.001). The lowest and highest PBS was obtained in the control (no silane) group (190.9±31) and laser-treated/ Porcelain Primer group (377.1±50), respectively. Conclusions Warm air-drying and CO2 laser heat treatment had a significantly beneficial effect on retentive strength of fiber posts. Porcelain Primer was significantly more effective than universal adhesive and Bis-Silane. Key words:Laser heat treatment, Pull-out bond strength, fiber post.
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Affiliation(s)
- Fereshteh Shafiei
- Professor, Oral and Dental Disease Research Center, Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Maryam Saadat
- Assistant professor, Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Zahra Jowkar
- Assistant professor, Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
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23
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Maroulakos G, He J, Nagy WW. The Post-endodontic Adhesive Interface: Theoretical Perspectives and Potential Flaws. J Endod 2018; 44:363-371. [PMID: 29306531 DOI: 10.1016/j.joen.2017.11.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 10/22/2017] [Accepted: 11/15/2017] [Indexed: 02/01/2023]
Abstract
INTRODUCTION The aim of this review was to analyze the potential of successful bonds of endodontic posts to radicular dentin as well as the limitations of the post-endodontic adhesive interface. METHODS The MEDLINE/PubMed and Web of Science electronic databases were searched. The search was augmented by a manual search of the pertinent bibliographies. RESULTS The post-endodontic adhesive interface finds application in the endodontic cohesive units. Many techniques and materials exist to improve the bond between endodontic posts and resin-based materials as well as between resin-based materials and radicular dentin. Different techniques used for the adhesion of metallic and fiber-reinforced posts are discussed and critically analyzed. CONCLUSIONS Although adhesive cementation of endodontic posts is popular, a long-term predictable bond may be compromised because of procedures related to the endodontic treatment and/or the adhesive cementation procedures. Microleakage and degradation phenomena may further jeopardize the post-endodontic adhesive interface.
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Affiliation(s)
- Georgios Maroulakos
- Department of General Dental Sciences, Marquette University School of Dentistry, Milwaukee, Wisconsin.
| | - Jianing He
- Department of Endodontics, Texas A&M University College of Dentistry, Dallas, Texas
| | - William W Nagy
- Department of Restorative Sciences, Texas A&M University College of Dentistry, Dallas, Texas
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24
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Barcelos LM, Bicalho AA, Veríssimo C, Rodrigues MP, Soares CJ. Stress Distribution, Tooth Remaining Strain, and Fracture Resistance of Endodontically Treated Molars Restored Without or With One or Two Fiberglass Posts And Direct Composite Resin. Oper Dent 2017; 42:646-657. [DOI: 10.2341/16-224-l] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
ABSTRACT
Objectives:
To evaluate the effects of direct composite resin without a post or with one or two fiberglass posts on the restoration of severely compromised endodontically treated molars.
Methods and Materials:
Forty-five molars with 2 mm of “remaining tooth structure” were divided into three groups: Wfgp, restored with Filtek Z350XT without a fiberglass post; 1fgp, restored with Z350XT with one fiberglass post in the distal root canal; and 2fgp, restored with Z350XT with two fiberglass posts, one in the distal root canal and the other in the mesial-buccal root canal. The teeth were load cycled. Tooth remaining strain was measured using strain gauges (n=10) at two moments: TrSt-100 N, during 100 N occlusal loading, and TrSt-Fr, at fracture load. Fracture resistance was calculated, and fracture mode was classified. The elastic modulus and Vickers hardness were calculated using dynamic indentation (n=5). Stress distribution was analyzed by three-dimensional finite element analysis.
Results:
The use of two fiberglass posts resulted in lower fracture resistance than was noted in the groups with one fiberglass post and without fiberglass posts. The lingual surface of the remaining tooth had higher strain values than the buccal surface, regardless of the restorative technique and moment of evaluation. The absence of a fiberglass post resulted in significantly higher strain values and more irreparable fracture modes than were noted in the other groups. The use of one fiberglass post had a better strain/fracture resistance ratio. Stresses were concentrated in the occlusal portion of the post and in the furcation region. The presence of one fiberglass post resulted in better stress distribution in the entire distal root dentin, reducing stress on the critical areas.
Conclusions:
The use of one fiberglass post for restoring molars with direct composite resin resulted in higher fracture resistance than did the use of two fiberglass posts; it also resulted in better tooth remaining strain and stress distribution and more reparable fracture modes than were seen in the group without a fiberglass post.
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Affiliation(s)
- LM Barcelos
- Luciana Mendes Barcelos, Department of Operative Dentistry and Dental Materials, Dental School, Federal University of Uberlândia, Minas Gerais, Brazil
| | - AA Bicalho
- Aline Aredes Bicalho, Technical Health School, Federal University of Uberlândia, Minas Gerais, Brazil
| | - C Veríssimo
- Crisnicaw Veríssimo, School of Dentistry, University of Uberaba, Uberaba, Minas Gerais, Brazil
| | - MP Rodrigues
- Monise de Paula Rodrigues, Department of Operative Dentistry and Dental Materials, Dental School, Federal University of Uberlândia, Minas Gerais, Brazil
| | - CJ Soares
- Carlos Jose Soares, Department of Operative Dentistry and Dental Materials, Dental School, Federal University of Uberlândia, Minas Gerais, Brazil
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Prado M, Marques JN, Pereira GD, da Silva EM, Simão RA. Evaluation of different surface treatments on fiber post cemented with a self-adhesive system. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 77:257-262. [PMID: 28532027 DOI: 10.1016/j.msec.2017.03.141] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 01/30/2017] [Accepted: 03/13/2017] [Indexed: 10/19/2022]
Abstract
Surface treatment of fiber-reinforced posts can increase adhesion, especially on the post/resin cement interface. The purpose of this in vitro study was to evaluate the effect of different surface treatments on fiber post cemented with a self-adhesive system. Sixty fiberglass epoxy resin posts were cleaned, dried and divided into 6 groups (n=10): Control (no surface treatment), silane (silane coupling agent was applied homogeneously on surface), 24% hydrogen peroxide (H2O2) (immersion during 1min), blasting (blasting with aluminum oxide for 30s), NH3 plasma (plasma treatment for 3min) and HMDSO plasma (plasma treatment for 15min). After the treatments, posts were inserted into a silicon matrix that was filled with the resin cement RelyX U200. Afterwards, the post/cement specimens were cut perpendicularly to the long axis of the posts into six 1.0mm thick discs and submitted to a push-out bond strength (POBS) test. Failure pattern was classified in 5 types: type I: cohesive in post; type II: cohesive in cement; type III: cohesive post and cement; type IV: adhesive post/cement; and type V: mixed (association between cohesive and adhesive). Data were analyzed by one-way ANOVA and Tukey HSD post hoc test (α=0.05). Silane (15.94±6.5), blasting (13.13±3.6), NH3 plasma (14.44±4.0) and HMDSO plasma (13.23±5.3) showed higher POBS when compared to control (p<0.05) and similar among them. H2O2 (9.40±4.0) treatment showed POBS values statistically similar to control (9.65±3.6). Failures were predominantly cohesive post and cement, type III, in all groups. In conclusion, surface treatments influenced in the adhesion of fiberglass post with the self-adhesive cement RelyX U200. Silane, blasting with aluminum oxide and plasmas (NH3 and HMDSO) showed results superior to 24% hydrogen peroxide.
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Affiliation(s)
- Maíra Prado
- Department of Metallurgic and Materials Engineering, Federal University of Rio de Janeiro - UFRJ, Rio de Janeiro, RJ, Brazil.
| | - Juliana N Marques
- Department of Metallurgic and Materials Engineering, Federal University of Rio de Janeiro - UFRJ, Rio de Janeiro, RJ, Brazil; Department of Clinical Dentistry, Endodontic Division, Federal University of Rio de Janeiro - UFRJ, Rio de Janeiro, RJ, Brazil
| | - Gisele Damiana Pereira
- Department of Clinical Dentistry, Endodontic Division, Federal University of Rio de Janeiro - UFRJ, Rio de Janeiro, RJ, Brazil
| | - Eduardo M da Silva
- Analytical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Federal Fluminense University, Niterói, RJ, Brazil
| | - Renata A Simão
- Department of Metallurgic and Materials Engineering, Federal University of Rio de Janeiro - UFRJ, Rio de Janeiro, RJ, Brazil
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Ree MH, Schwartz RS. Long-term Success of Nonvital, Immature Permanent Incisors Treated With a Mineral Trioxide Aggregate Plug and Adhesive Restorations: A Case Series from a Private Endodontic Practice. J Endod 2017; 43:1370-1377. [PMID: 28578893 DOI: 10.1016/j.joen.2017.02.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2016] [Revised: 02/15/2017] [Accepted: 02/26/2017] [Indexed: 10/19/2022]
Abstract
This case series evaluated the long-term clinical outcome of nonvital immature teeth treated with mineral trioxide aggregate (MTA) as an apical barrier and an adhesive restoration with or without a fiber post. Eighty-three teeth in 72 patients were treated by the first author with an apical MTA plug and an adhesive restoration of composite resin and in 45 of the 83 teeth 1 or more fiber posts. All of the patients had been referred to the first author's private endodontic practice with at least 1 immature tooth with signs of pulpal necrosis and subsequent apical periodontitis that had been caused by a variety of traumatic dental injuries. Three teeth presented had dens invaginatus. Of 83 teeth, 69 teeth in 60 patients were available for follow-up after 5 to 15 years (recall rate = 83%). The mean follow-up time was 8.29 years. No teeth were lost because of a root fracture. Ninety-six percent (66/69) of the recalled teeth were characterized as healed. Based on periapical radiographs and clinical examination, 96% of teeth treated with the MTA barrier technique and adhesive restorations were characterized as "healed" and were in function after 5 to 15 years (mean = 8.29 years). These results indicate that this is a viable and predictable treatment approach for the long-term success of nonvital immature teeth.
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Affiliation(s)
- Marga H Ree
- Private Practice, Purmerend, Netherlands; and Private Practice, San Antonio, Texas.
| | - Richard S Schwartz
- Private Practice, Purmerend, Netherlands; and Private Practice, San Antonio, Texas
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27
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Aksornmuang J, Chuenarrom C, Chittithaworn N. Effects of various etching protocols on the flexural properties and surface topography of fiber-reinforced composite dental posts. Dent Mater J 2017; 36:614-621. [PMID: 28566672 DOI: 10.4012/dmj.2016-290] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The purpose of this study was to evaluate the flexural properties and surface topography of fiber posts surface-treated with various etching protocols. Seventy each of three types of fiber posts: RelyX Fiber Post, Tenax Fiber Trans, and D.T. Light-Post Illusion X-Ro, were randomly divided into 7 groups: no surface treatment, surface treated with hydrofluoric acid (HF) 4.5% for 60 s, HF 4.5% for 120 s, HF 9.6% for 15 s, HF 9.6% for 60 s, HF 9.6% for 120 s, and treated with H2O2 24% for 10 min. The specimens were then subjected to a three-point bending test. Surface topographies of the posts were observed using a SEM. The results indicate that fiber post surface pretreatments had no adverse effects on the flexural properties. However, the fiber posts treated with high HF concentrations or long etching times seemed to have more surface irregularities.
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Affiliation(s)
- Juthatip Aksornmuang
- Department of Prosthetic Dentistry, Faculty of Dentistry, Prince of Songkla University
| | - Chanya Chuenarrom
- Department of Prosthetic Dentistry, Faculty of Dentistry, Prince of Songkla University
| | - Natjira Chittithaworn
- Department of Prosthetic Dentistry, Faculty of Dentistry, Prince of Songkla University
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Silva FP, Faria-E-Silva AL, Moraes RR, Ogliari AO, Reis GR, Oliveira ARF, Menezes MS. Effect of thermally deposited siloxane-methacrylate coating on bonding to glass fibre posts. Int Endod J 2017; 51:79-85. [PMID: 28439909 DOI: 10.1111/iej.12786] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 04/20/2017] [Indexed: 11/29/2022]
Abstract
AIM To evaluate the alterations promoted by a thermally deposited siloxane-methacrylate coating on the surface of glass fibre posts and their effect on the bond strength of resin-core materials to the posts. METHODOLOGY Fibre post surfaces were treated with experimental thermally deposited siloxane-methacrylate coatings or clinically available treatments (i.e. hydrogen peroxide and methylene chloride); nontreated posts were used as controls. The contact angles formed between the post surface and the water/adhesive were measured with a tensiometer. Scanning electron microscopy and electron dispersive spectroscopy were used to examine the topographies and chemical changes in the post surfaces following treatment. Surface roughness was evaluated with laser interferometry. Core resin was bonded to the fibre posts, and microtensile bond strength testing was subsequently performed. The data were individually submitted to anova and Tukey's tests (α = 0.05). RESULTS The water contact angle was reduced significantly (P < 0.05) by the thermally deposited siloxane-methacrylate coating. All treatments significantly increased the adhesive contact angle (P ≤ 0.016) compared to the control as well as the surface roughness (P ≤ 0.006) and the amount of Si on post surfaces. Greater percentages of Si were observed for the thermally deposited coating. The bond strength to the posts was significantly improved by the thermally deposited coating (P < 0.05), whereas the other treatments did not differ from the control. CONCLUSION Treating the surface of glass fibre posts with a thermally deposited siloxane-methacrylate coating improved the bond strength to resin-based materials. The coating could be performed by manufacturers of glass fibre posts in order to reduce the number of clinical steps required for luting posts into root canals.
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Affiliation(s)
- F P Silva
- Department of Dentistry, Dentistry School, University of Rio Verde, Rio Verde, Goiás, Brazil
| | - A L Faria-E-Silva
- Department of Dentistry, Dentistry School, Federal University of Sergipe, Aracaju, SE, Brazil
| | - R R Moraes
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil
| | - A O Ogliari
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil
| | - G R Reis
- Department of Dentistry, Dentistry School, University of Rio Verde, Rio Verde, Goiás, Brazil
| | - A R F Oliveira
- Faculty of Mechanical Engineering, Federal University of Uberlandia, Uberlândia, MG, Brazil
| | - M S Menezes
- Department of Restorative Dentistry and Dental Materials, Dental School, Federal University of Uberlândia, MG, Brazil
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do Prado M, da Silva EM, Marques JDN, Gonzalez CB, Simão RA. The effects of non-thermal plasma and conventional treatments on the bond strength of fiber posts to resin cement. Restor Dent Endod 2017; 42:125-133. [PMID: 28503478 PMCID: PMC5426224 DOI: 10.5395/rde.2017.42.2.125] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Accepted: 02/11/2017] [Indexed: 11/11/2022] Open
Abstract
Objectives This study compared the effect of hexamethyldisiloxane (HMDSO) and ammonia (NH3) plasmas on the bond strength of resin cement to fiber posts with conventional treatments. Materials and Methods Sixty-five fiber posts were divided into 5 groups: Control (no surface treatment); H2O2 (24% hydrogen peroxide for 1 min); Blasting (blasting with aluminum oxide for 30 sec); NH3 (NH3 plasma treatment for 3 min); HMDSO (HMDSO plasma treatment for 15 min). After the treatments, the Ambar adhesive (FGM Dental Products) was applied to the post surface (n = 10). The fiber post was inserted into a silicon matrix that was filled with the conventional resin cement Allcem Core (FGM). Afterwards, the post/cement specimens were cut into discs and subjected to a push-out bond strength (POBS) test. Additionally, 3 posts in each group were evaluated using scanning electron microscopy. The POBS data were analyzed by one-way analysis of variance and the Tukey's honest significant difference post hoc test (α = 0.05). Results The Blasting and NH3 groups showed the highest POBS values. The HMDSO group showed intermediate POBS values, whereas the Control and H2O2 groups showed the lowest POBS values. Conclusion Blasting and NH3 plasma treatments were associated with stronger bonding of the conventional resin cement Allcem to fiber posts, in a procedure in which the Ambar adhesive was used.
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Affiliation(s)
- Maíra do Prado
- Metallurgical and Materials Engineering, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Eduardo Moreira da Silva
- Analytical Laboratory of Restorative Biomaterials - LABiom-R, School of Dentistry, Federal Fluminense University, Niterói, Brazil
| | - Juliana das Neves Marques
- Metallurgical and Materials Engineering, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Caroline Brum Gonzalez
- Department of Dental Clinics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Renata Antoun Simão
- Metallurgical and Materials Engineering, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Abstract
The primary function of an endodontic post is to provide retention for the core and enable full sealing of the coronal portion of the root canal. Traditionally used metal posts do not meet the requirements of modern dental medicine due to some fairly significant drawbacks such as color, corrosion potential, non-adhesive bonding and high modulus of elasticity which can lead to root fracture. Recently, esthetic ceramic and fiber reinforced posts have been manufactured in order to avoid such imperfections. Since much attention has been devoted to the esthetic aspects of dental medicine, the use of these posts with composite/ceramic cores is very common in restorative dentistry and it is actually becoming a standard. This is due to the fact that, apart from being an esthetically pleasing material, they are also biocompatible, have good physical properties and the capacity of adhesive bonding to tooth tissue and core buildup. Nonetheless, a good clinician should know how to spot the difference between them in order to select and use the appropriate post system in each specific situation.
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Affiliation(s)
| | - Amižić
- Health Center of Split, Dalmatia County
| | - Anja Baraba
- Department of Endodontics and Restorative Dentistry, School of Dental Medicine University of Zagreb
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Barbosa Siqueira C, Spadini de Faria N, Raucci-Neto W, Colucci V, Alves Gomes E. Evaluation of Mechanical Properties of Glass Fiber Posts Subjected to Laser Surface Treatments. Photomed Laser Surg 2016; 34:460-466. [PMID: 27564314 DOI: 10.1089/pho.2016.4144] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE The aim of this study was to evaluate the influence of laser irradiation on flexural strength, elastic modulus, and surface roughness and morphology of glass fiber posts (GFPs). BACKGROUND DATA Laser treatment of GFPs has been introduced to improve its adhesion properties. MATERIALS AND METHODS A total of 40 GFPs were divided into 4 groups according to the irradiation protocol: GC-no irradiation, GYAG-irradiation with erbium:yttrium-aluminum-garnet [Er:YAG], GCR-irradiation with erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG), and GDI-irradiation with diode laser. The GFP roughness and morphology were evaluated through laser confocal microscopy before and after surface treatment. Three-point bending flexural test measured flexural strength and elastic modulus. Data about elastic modulus and flexural strength were subjected to one-way ANOVA and Bonferroni test (p < 0.05). The effect of roughness was evaluated using the linear mixed effects model and Bonferroni test (p < 0.05). RESULTS Laser treatment changed surface roughness in the groups GCR (p = 0.000) and GDI (p = 0.007). The mean flexural strength in GYAG (995.22 MPa) was similar to that in GC (980.48 MPa) (p = 1.000) but different from that in GCR (746.83 MPa) and that in GDI (691.34 MPa) (p = 0.000). No difference was found between the groups GCR and GDI (p = 0.86). For elastic modulus: GYAG (24.47 GPa) was similar to GC (25.92 GPa) (p = 1.000) but different from GCR (19.88 GPa) (p = 0.002) and GDI (17.20 GPa) (p = 0.000). CONCLUSIONS The different types of lasers, especially Er,Cr:YSGG and 980 ηm diode, influenced the mechanical properties of GFPs.
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Affiliation(s)
| | | | - Walter Raucci-Neto
- School of Dentistry, University of Ribeirão Preto , Ribeirão Preto, Brazil
| | - Vivian Colucci
- School of Dentistry, University of Ribeirão Preto , Ribeirão Preto, Brazil
| | - Erica Alves Gomes
- School of Dentistry, University of Ribeirão Preto , Ribeirão Preto, Brazil
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Comparison between gutta-percha and resin-coated gutta-percha using different obturation techniques. J Appl Biomater Funct Mater 2016; 14:e307-13. [PMID: 27149939 DOI: 10.5301/jabfm.5000273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/08/2016] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND The aim of this study was to evaluate and compare the obturation quality between canals obturated with gutta-percha/AH Plus sealer (GP group) and resin-coated GP/EndoREZ® sealer (ER group). METHODS A total sample of 90 mandibular premolar teeth was divided into 2 groups (2 × 45 canals): the GP group and ER group. Each group was further divided into 3 subgroups (n = 15): cold lateral compaction (CLC), warm lateral compaction (WLC) and single cone (SC). The teeth were subsequently embedded in resin and sectioned horizontally at 1, 3, 6 and 9 mm. All sections were then viewed with a stereomicroscope at ×40 magnification. The area occupied by core filling materials was determined using Cell^D software. RESULTS With CLC, the percentage of core filling materials in the ER group was significantly higher than in the GP group at the 1- and 3-mm levels. Similarly, with WLC, the percentage of core filling material in the ER group was significantly higher than in the GP group at the 1-, 3- and 9-mm levels. With SC, the percentage of core filling materials in the ER group was significantly higher than in the GP group at all levels. CONCLUSIONS It can be concluded that the resin-coated GP/EndoREZ® sealer is superior to the gutta-percha/AH Plus in the percentage of core filling material.
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Pyun JH, Shin TB, Lee JH, Ahn KM, Kim TH, Cha HS. Effects of hydrogen peroxide pretreatment and heat activation of silane on the shear bond strength of fiber-reinforced composite posts to resin cement. J Adv Prosthodont 2016; 8:94-100. [PMID: 27141252 PMCID: PMC4852272 DOI: 10.4047/jap.2016.8.2.94] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 12/22/2015] [Accepted: 02/15/2016] [Indexed: 11/16/2022] Open
Abstract
PURPOSE To evaluate the effects of hydrogen peroxide pretreatment and heat activation of silane on the shear bond strength of fiber-reinforced composite posts to resin cement. MATERIALS AND METHODS The specimens were prepared to evaluate the bond strength of epoxy resin-based fiber posts (D.T. Light-Post) to dual-curing resin cement (RelyX U200). The specimens were divided into four groups (n=18) according to different surface treatments: group 1, no treatment; group 2, silanization; group 3, silanization after hydrogen peroxide etching; group 4, silanization with warm drying at 80℃ after hydrogen peroxide etching. After storage of the specimens in distilled water at 37℃ for 24 hours, the shear bond strength (in MPa) between the fiber post and resin cement was measured using a universal testing machine. The fractured surface of the fiber post was examined using scanning electron microscopy. Data were analyzed using one-way ANOVA and post-hoc analysis with Tukey's HSD test (α=0.05). RESULTS Silanization of the fiber post (Group 2) significantly increased the bond strength in comparison with the non treated control (Group 1) (P<.05). Heat drying after silanization also significantly increased the bond strength (Group 3 and 4) (P<.05). However, no effect was determined for hydrogen peroxide etching before applying silane agent (Group 2 and 3) (P>.05). CONCLUSION Fiber post silanization and subsequent heat treatment (80℃) with warm air blower can be beneficial in clinical post cementation. However, hydrogen peroxide etching prior to silanization was not effective in this study.
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Affiliation(s)
- Jung-Hoon Pyun
- Divison of Prosthodontics, Department of Dentistry, Asan Medical Center, Seoul, Republic of Korea
| | - Tae-Bong Shin
- Private Practice, Divison of Prosthodontics, Department of Dentistry, College of Medicine, University of Ulsan, Seoul, Republic of Korea
| | - Joo-Hee Lee
- Divison of Prosthodontics, Department of Dentistry, College of Medicine, University of Ulsan, Asan Medical Center, Seoul, Republic of Korea
| | - Kang-Min Ahn
- Division of Oral and maxillofacial Surgery, Department of Dentistry, College of Medicine, University of Ulsan, Asan Medical Center, Seoul, Republic of Korea
| | - Tae-Hyung Kim
- Division of Prosthodontics, Department of Restorative Science, Herman Ostrow School of Dentistry of USC, University of Southern California, Los Angeles, California, USA
| | - Hyun-Suk Cha
- Divison of Prosthodontics, Department of Dentistry, College of Medicine, University of Ulsan, Asan Medical Center, Seoul, Republic of Korea
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MARQUES JDN, GONZALEZ CB, SILVA EMD, PEREIRA GDDS, SIMÃO RA, PRADO MD. Análise comparativa da resistência de união de um cimento convencional e um cimento autoadesivo após diferentes tratamentos na superfície de pinos de fibra de vidro. REVISTA DE ODONTOLOGIA DA UNESP 2016. [DOI: 10.1590/1807-2577.18615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Resumo Introdução Os pinos de fibra de vidro são uma alternativa aos núcleos metálicos e apresentam vantagens, tais como: estética, módulo de elasticidade semelhante à dentina e cimentação imediata após o término do tratamento endodôntico. Ainda, apresentam a capacidade de aderir ao cimento resinoso e este, à dentina, por meio de técnicas adesivas. Objetivo Comparar a adesão de um cimento resinoso convencional e um autoadesivo a pinos de fibra de vidro, e os efeitos de diferentes tratamentos de superfície na resistência adesiva dos pinos. Material e método Trinta pinos foram divididos em três grupos: Controle: sem tratamento na superfície; Jateamento: jateamento com óxido de alumínio por 30 segundos, e Peróxido: imersão em peróxido de hidrogênio 24% por um minuto. Em seguida, corpos de prova foram obtidos a partir de cilindros de cimento resinoso contendo o pino de fibra posicionado no centro de seu longo eixo. Em cada grupo, cinco pinos foram associados ao adesivo Âmbar + cimento convencional AllCem Core e os outros cinco pinos, ao cimento autoadesivo RelyX U200. O conjunto pino/cimento foi segmentado e avaliado em relação à resistência de união (RU) por push-out. Os dados foram analisados estatisticamente pelos testes de ANOVA e Tukey (p<0,05). Resultado Os cimentos avaliados exibiram valores de RU semelhantes. Em relação aos tratamentos de superfície, os maiores valores de RU foram encontrados no grupo Jateamento. Conclusão O cimento convencional, AllCem Core, e o cimento autoadesivo, RelyX U200, mostraram valores de resistência de união semelhantes. Ainda, o jateamento com óxido de alumínio favoreceu a adesão dos pinos aos cimentos.
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Penelas AG, Piedade VM, Borges ACODS, Poskus LT, da Silva EM, Guimarães JGA. Can cement film thickness influence bond strength and fracture resistance of fiber reinforced composite posts? Clin Oral Investig 2015; 20:849-55. [PMID: 26319977 DOI: 10.1007/s00784-015-1568-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 08/13/2015] [Indexed: 11/29/2022]
Affiliation(s)
- Alice Gonçalves Penelas
- Analytical Laboratory of Restorative Biomaterials (LABiom-R), School of Dentistry, Federal Fluminense University, Rua Mario Santos Braga, nº30, 3º andar Campus do Valonguinho, Centro, Niterói, Rio de Janeiro, CEP 24.020-140, Brazil
| | - Valery Martins Piedade
- Analytical Laboratory of Restorative Biomaterials (LABiom-R), School of Dentistry, Federal Fluminense University, Rua Mario Santos Braga, nº30, 3º andar Campus do Valonguinho, Centro, Niterói, Rio de Janeiro, CEP 24.020-140, Brazil
| | - Ana Carolina Oliveira da Silva Borges
- Analytical Laboratory of Restorative Biomaterials (LABiom-R), School of Dentistry, Federal Fluminense University, Rua Mario Santos Braga, nº30, 3º andar Campus do Valonguinho, Centro, Niterói, Rio de Janeiro, CEP 24.020-140, Brazil
| | - Laiza Tatiana Poskus
- Analytical Laboratory of Restorative Biomaterials (LABiom-R), School of Dentistry, Federal Fluminense University, Rua Mario Santos Braga, nº30, 3º andar Campus do Valonguinho, Centro, Niterói, Rio de Janeiro, CEP 24.020-140, Brazil
| | - Eduardo Moreira da Silva
- Analytical Laboratory of Restorative Biomaterials (LABiom-R), School of Dentistry, Federal Fluminense University, Rua Mario Santos Braga, nº30, 3º andar Campus do Valonguinho, Centro, Niterói, Rio de Janeiro, CEP 24.020-140, Brazil
| | - José Guilherme Antunes Guimarães
- Analytical Laboratory of Restorative Biomaterials (LABiom-R), School of Dentistry, Federal Fluminense University, Rua Mario Santos Braga, nº30, 3º andar Campus do Valonguinho, Centro, Niterói, Rio de Janeiro, CEP 24.020-140, Brazil.
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Pereira RD, Valdívia ADCM, Bicalho AA, Franco SD, Tantbirojn D, Versluis A, Soares CJ. Effect of Photoactivation Timing on the Mechanical Properties of Resin Cements and Bond Strength of Fiberglass Post to Root Dentin. Oper Dent 2015; 40:E206-21. [PMID: 26237639 DOI: 10.2341/14-115-l] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVES This study tested the hypothesis that photoactivation timing and resin cement affect mechanical properties and bond strength of fiberglass posts to root dentin at different depths. METHODS Fiberglass posts (Exacto, Angelus) were luted with RelyX Unicem (3M ESPE), Panavia F 2.0 (Kuraray), or RelyX ARC (3M ESPE) using three photoactivation timings: light curing immediately, after three minutes, or after five minutes. Push-out bonding strength, PBS (n=10) was measured on each root region (coronal, middle, apical). The elastic modulus (E) and Vickers hardness (VHN) of the cement layer along the root canal were determined using dynamic indentation (n=5). A strain-gauge test was used to measure post-gel shrinkage of each cement (n=10). Residual shrinkage stress was assessed with finite element analysis. Data were analyzed with two-way analysis of variance in a split-plot arrangement and a Tukey test (α=0.05). Multiple linear regression analysis was used to determine the influence of study factors. RESULTS The five-minute delay photoactivation timing significantly increased the PBS for all resin cements evaluated. The PBS decreased significantly from coronal to apical root canal regions. The mean values for E and VHN increased significantly with the delayed photoactivation for RelyX Unicem and decreased from coronal to apical root regions for all resin cements with the immediate-curing timing. CONCLUSIONS The PBS of fiber posts to root dentin, E, and VHN values were affected by the root canal region, photoactivation timing, and resin cement type. Shrinkage stress values decreased gradually with delayed photoactivation for all the cements.
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Borges MG, Faria-e-Silva AL, Santos-Filho PCF, Silva FP, Martins LRM, Menezes MDS. Does the moment of fiber post cutting influence on the retention to root dentin? Braz Dent J 2015; 26:141-5. [PMID: 25831104 DOI: 10.1590/0103-6440201300242] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2014] [Accepted: 12/15/2014] [Indexed: 11/21/2022] Open
Abstract
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.
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Affiliation(s)
- Marcela G Borges
- Department of Operative Dentistry and Dental Materials, Dental School, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - André L Faria-e-Silva
- Department of Dentistry, School of Dentistry, UFS - Federal University of Sergipe, Aracaju, SE, Brazil
| | - Paulo C F Santos-Filho
- Department of Operative Dentistry and Dental Materials, Dental School, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Fernanda P Silva
- Department of Operative Dentistry and Dental Materials, Dental School, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Luís R M Martins
- Department of Restorative Dentistry, Piracicaba Dental School, UNICAMP - University of Campinas, Piracicaba, SP, Brazil
| | - Murilo de Sousa Menezes
- Department of Operative Dentistry and Dental Materials, Dental School, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil
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Machado FW, Bossardi M, Ramos TDS, Valente LL, Münchow EA, Piva E. Application of Resin Adhesive on the Surface of a Silanized Glass Fiber–reinforced Post and Its Effect on the Retention to Root Dentin. J Endod 2015; 41:106-10. [DOI: 10.1016/j.joen.2014.09.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2014] [Revised: 08/30/2014] [Accepted: 09/16/2014] [Indexed: 11/27/2022]
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Effect of surface treatments on the flexural properties and adhesion of glass fiber-reinforced composite post to self-adhesive luting agent and radicular dentin. Odontology 2014; 104:60-7. [DOI: 10.1007/s10266-014-0184-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Accepted: 10/16/2014] [Indexed: 10/24/2022]
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40
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Khoroushi M, Mazaheri H, Tarighi P, Samimi P, Khalighinejad N. Effect of antioxidants on push-out bond strength of hydrogen peroxide treated glass fiber posts bonded with two types of resin cement. Restor Dent Endod 2014; 39:303-9. [PMID: 25383350 PMCID: PMC4223101 DOI: 10.5395/rde.2014.39.4.303] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Accepted: 07/27/2014] [Indexed: 12/02/2022] Open
Abstract
Objectives Hydrogen peroxide (H2O2) surface treatment of fiber posts has been reported to increase bond strength of fiber posts to resin cements. However, residual oxygen radicals might jeopardize the bonding procedure. This study examined the effect of three antioxidant agents on the bond strength of fiber posts to conventional and self-adhesive resin cements. Materials and Methods Post spaces were prepared in forty human maxillary second premolars. Posts were divided into five groups of 8 each: G1 (control), no pre-treatment; G2, 10% H2O2 pre-treatment; G3, G4 and G5. After H2O2 application, Hesperidin (HES), Sodium Ascorbate (SA) or Rosmarinic acid (RA) was applied on each group respectively. In each group four posts were cemented with Duo-Link conventional resin cement and the others with self-adhesive BisCem cement. Push-out test was performed and data were analyzed using 2-way ANOVA and tukey's post-hoc test (α = 0.05). Results There was a statistically significant interaction between the cement type and post surface treatment on push-out bond strength of fiber posts (p < 0.001, F = 16). Also it was shown that different posts' surface treatments significantly affect the push-out bond strength of fiber posts (p = 0.001). H2O2 treated posts (G2) and control posts (G1) cemented with Duo-link showed the highest (15.96 ± 5.07MPa) and lowest bond strengths (6.79 ± 3.94) respectively. Conclusions It was concluded that H2O2 surface treatment might enhance the bond strength of fiber posts cemented with conventional resin cements. The effect of antioxidants as post's surface treatment agents depends on the characteristics of resin cements used for bonding procedure.
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Affiliation(s)
- Maryam Khoroushi
- Department of Operative Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran. ; Dental Materials Research Center, Isfahan University of Medical Science, Isfahan, Iran
| | - Hamid Mazaheri
- Dental Materials Research Center, Isfahan University of Medical Science, Isfahan, Iran
| | - Pardis Tarighi
- Department of Operative Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran. ; Department of Operative Dentistry and Torabinejad Dental Research Center, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Pouran Samimi
- Department of Operative Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Navid Khalighinejad
- Dental Materials Research Center, Isfahan University of Medical Science, Isfahan, Iran
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Santos-Filho PCF, Veríssimo C, Raposo LHA, Noritomi, MecEng PY, Marcondes Martins LR. Influence of Ferrule, Post System, and Length on Stress Distribution of Weakened Root-filled Teeth. J Endod 2014; 40:1874-8. [DOI: 10.1016/j.joen.2014.07.015] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 06/23/2014] [Accepted: 07/09/2014] [Indexed: 11/27/2022]
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Kurtulmus-Yilmaz S, Cengiz E, Ozan O, Ramoglu S, Yilmaz HG. The Effect of Er,Cr:YSGG Laser Application on the Micropush-Out Bond Strength of Fiber Posts to Resin Core Material. Photomed Laser Surg 2014; 32:574-81. [DOI: 10.1089/pho.2014.3780] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
| | - Esra Cengiz
- Department of Restorative Dentistry, Faculty of Dentistry, Near East University, Mersin, Turkey
| | - Oguz Ozan
- Department of Prosthodontics, Faculty of Dentistry, Near East University, Mersin, Turkey
| | - Serhat Ramoglu
- Department of Prosthodontics, Faculty of Dentistry, Near East University, Mersin, Turkey
| | - Hasan Guney Yilmaz
- Department of Periodontology, Faculty of Dentistry, Near East University, Mersin, Turkey
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de Rosatto CMP, Roscoe MG, Novais VR, Menezes MDS, Soares CJ. Effect of silane type and air-drying temperature on bonding fiber post to composite core and resin cement. Braz Dent J 2014; 25:217-24. [PMID: 25252257 DOI: 10.1590/0103-6440201300005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 06/17/2014] [Indexed: 11/22/2022] Open
Abstract
This study evaluated the influence of silane type and temperature of silane application on push-out bond strength between fiberglass posts with composite resin core and resin cement. One hundred and sixty fiberglass posts (Exacto, Angelus) had the surface treated with hydrogen peroxide 24%. Posts were divided in 8 groups according to two study factors: air-drying temperature after silane application (room temperature and 60 ºC) and silane type: three pre-hydrolyzed--Silano (Angelus), Prosil (FGM), RelyX Ceramic Primer (3M ESPE) and one two-component silane--Silane Coupling Agent (Dentsply). The posts (n=10) for testing the bond strength between post and composite core were centered on a cylindrical plastic matrix and composite resin (Filtek Z250 XT, 3M ESPE) that was incrementally inserted and photoactivated. Eighty bovine incisor roots (n=10) were prepared for testing the bond strength between post and resin cement (RelyX U100, 3M ESPE) and received the fiberglass posts. Push-out test was used to measure the bond strength. Data were analyzed by two-way ANOVA followed by Tukey's test (α=0.05). ANOVA revealed that temperature and silane had no influence on bond strength between composite core and post. However, for bond strength between post and resin cement, the temperature increase resulted in a better performance for Silane Coupling Agent, Silano and RelyX Ceramic Primer. At room temperature Silane Coupling Agent showed the lowest bond strength. Effect of the warm air-drying is dependent on the silane composition. In conclusion, the use of silane is influenced by wettability of resinous materials and pre-hydrolyzed silanes are more stable compared with the two-bottle silane.
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Affiliation(s)
- Camila Maria Peres de Rosatto
- Department of Operative Dentistry and Dental Materials, Dental School, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Marina Guimarães Roscoe
- Department of Operative Dentistry and Dental Materials, Dental School, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Veridiana Resende Novais
- Department of Operative Dentistry and Dental Materials, Dental School, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Murilo de Sousa Menezes
- Department of Operative Dentistry and Dental Materials, Dental School, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil
| | - Carlos José Soares
- Department of Operative Dentistry and Dental Materials, Dental School, UFU - Federal University of Uberlândia, Uberlândia, MG, Brazil
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Majeti C, Veeramachaneni C, Morisetty PK, Rao SA, Tummala M. A simplified etching technique to improve the adhesion of fiber post. J Adv Prosthodont 2014; 6:295-301. [PMID: 25177473 PMCID: PMC4146730 DOI: 10.4047/jap.2014.6.4.295] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 05/06/2014] [Accepted: 05/12/2014] [Indexed: 11/23/2022] Open
Abstract
PURPOSE Numerous methods were used to etch the fiber posts to improve its bonding to root canal dentin. Our aim was to evaluate the efficacy of 37% phosphoric acid in etching fiber posts in comparison with 24% hydrogen peroxide. MATERIALS AND METHODS Ninety human maxillary central incisors were taken and post space preparation was done. Ninety fiber posts were taken and divided into three groups (n=30) based on the surface treatment they received (H3PO4, H2O2, distilled water) and each group was further divided (n=10) based on the time period of application (15 seconds, 30 seconds, 60 seconds). All the posts were luted into canals using Rely X UniCem-2. Each tooth was then sectioned into six slices and subjected to push out test. Data obtained was subjected to statistical analysis at P<.05. The surface topography was evaluated using scanning electron microscopy. RESULTS Highest bond strength values were noted in 15 seconds etched phosphoric acid group and 60 seconds etched hydrogen peroxide group with no significant difference between two groups. Surface topography revealed complete epoxy layer removal with no damage to its structural integrity in those groups. CONCLUSION H3PO4 etching for a period of 15 seconds is an effective alternative in improving the adhesion of fiber post to root dentin.
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Affiliation(s)
- Chandrakanth Majeti
- Department of Conservative Dentistry and Endodontics, Mamata Dental College, Khammam, Andhra Pradesh, India
| | | | - Pradeep Kumar Morisetty
- Department of Conservative Dentistry and Endodontics, Mamata Dental College, Khammam, Andhra Pradesh, India
| | - Saggurti Anitha Rao
- Department of Conservative Dentistry and Endodontics, Mamata Dental College, Khammam, Andhra Pradesh, India
| | - Muralidhar Tummala
- Department of Conservative Dentistry and Endodontics, Mamata Dental College, Khammam, Andhra Pradesh, India
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Faria-e-Silva AL, Peixoto AC, Borges MG, Menezes MDS, Moraes RRD. Immediate and delayed photoactivation of self-adhesive resin cements and retention of glass-fiber posts. Braz Oral Res 2014; 28. [PMID: 25006624 DOI: 10.1590/s1806-83242014.50000005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The aim of this study was to evaluate the effect of immediate and delayed photoactivation of self-adhesive resin cements (SARCs) on the retention of glass-fiber posts luted into root canals. Bovine incisors were endodontically treated, and post holes of 9 mm in depth were prepared. Fiber posts were luted using one of two SARCs, BisCem (Bisco Inc., Schaumburg, USA) or RelyX Unicem clicker (3M ESPE, Saint Paul, USA), or a regular (etch-and-rinse) resin cement (AllCem; FGM, Joinvile, Brazil). Photoactivation was performed immediately, or at 5 or 10 min after cementation. Root/post specimens were transversely sectioned 7 days after luting into 1-mm-thick slices, which were submitted to push-out testing in a mechanical testing machine. Bond strength data were analyzed by two-way ANOVA and Student-Newman-Keuls' method (α = 0.05). Immediate photoactivation resulted in the highest bond strength for Unicem. BisCem demonstrated higher bond strength values when photoactivated after a 10-min delay. Immediate photoactivation yielded the lowest bond strengths for AllCem, although no differences in bond strength were observed between photoactivation delayed by 5 and 10 min. In conclusion, the moment of resin cement photoactivation may affect the intraradicular retention of fiber posts, depending upon the resin cement used for luting.
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46
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Talebian R, Khamverdi Z, Nouri M, Kasraei S. Effect of ascorbic acid on bond strength between the hydrogen peroxide-treated fiber posts and composite resin cores. J Conserv Dent 2014; 17:220-4. [PMID: 24944443 PMCID: PMC4056391 DOI: 10.4103/0972-0707.131779] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2013] [Revised: 01/26/2014] [Accepted: 02/23/2014] [Indexed: 11/22/2022] Open
Abstract
Aim: This study evaluated the effect of 10% ascorbic acid on the bond strength between fiber post and composite resin core after applying 24% hydrogen peroxide. Materials and Methods: Twenty-four hydrogen peroxide-treated fiber posts were divided into 4 groups (n = 6). Group 1 was the control group with no treatment. In groups 2-4, post surfaces were treated with 10% v ascorbic acid solution for 10, 30 and 60 minutes, respectively. Cores were built up using flowable composite resin. Two sticks were prepared from each specimen. Microtensile bond strength test was performed for each stick. Failure modes of sticks were evaluated under a stereomicroscope (×20). Surface morphologies of two fractured sticks from each group were assessed by SEM. Statistical analysis: Data were analyzed using one-way ANOVA and Tukey HSD tests (α = 0.05). Results: The highest microtensile bond strength was observed in Group 4 (20.55 ± 2.09) and the lowest in Group 1 (10.10 ± 0.55). There were significant differences in microtensile bond strength between all the groups (P < 0.05). Conclusion: It is concluded that ascorbic acid application increased the microtensile bond strength between the hydrogen peroxide treated fiber post and composite resin core. The increase is dependent on the duration of exposure to the antioxidant.
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Affiliation(s)
- Reza Talebian
- DDS, Centre of Advanced Cosmetic and Reconstructive Dentistry, Kashan, Iran
| | - Zahra Khamverdi
- DDS, MSD, Dental Research Center, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
| | | | - Shahin Kasraei
- DDS, MSD, Dental Research Center, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
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Bonding effectiveness of two adhesive luting cements to glass fiber posts: pull-out evaluation of three different post surface conditioning methods. Int J Dent 2014; 2014:148571. [PMID: 24987418 PMCID: PMC4060424 DOI: 10.1155/2014/148571] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 05/05/2014] [Accepted: 05/05/2014] [Indexed: 11/18/2022] Open
Abstract
The purpose of this study was to evaluate the bond strength at the post/resin-cement interface with 3 different surface treatments of glass fiber posts and with 2 different luting resin cements. Sixty glass fiber posts (RelyX Fiber Post) were randomly divided into 3 groups (n = 20) and were luted with a dual-polymerizing self-adhesive universal resin cement (RelyX Unicem) and with a dual-polymerizing resin cement (RelyX ARC). This was carried out in association with a dual-polymerizing adhesive (Scotchbond Multi-Purpose Plus) in simulated plexiglass root canals after receiving three different pretreatment procedures. A pull-out test was performed on each sample to measure bond strengths. Data were analyzed with two-way ANOVA. Two samples from each group were processed for SEM observations in order to investigate the morphologic aspect of the post/cement interface. Both resin cements demonstrated significant different bond strength values (P < 0.0001). The surface treatment result was also statistically significant (P = 0.0465). SEM examination showed a modification of the post surface after pretreatment with methyl methacrylate. The dual-polymerizing self-adhesive universal resin cement achieved higher MPa bond strength values. The use of methyl methacrylate as a surface treatment of glass fiber posts provided a significant increase in bond strengths between the posts and both luting materials.
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Valdivia ADCM, Novais VR, Menezes MDS, Roscoe MG, Estrela C, Soares CJ. Effect of Surface Treatment of Fiberglass Posts on Bond Strength to Root Dentin. Braz Dent J 2014; 25:314-20. [DOI: 10.1590/0103-6440201300143] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 08/12/2014] [Indexed: 11/21/2022] Open
Abstract
This study evaluated the influence of the surface treatments of fiberglass posts on bond strength to root dentin using push-out test. Forty bovine incisor roots were endodontically treated. The surface of the fiberglass posts (Exacto #2, Angelus) were treated using 4 different protocols (n=10): Control - 70% ethanol for 1 min; 37% phosphoric acid for 1 min; 10% hydrofluoric acid for 1 min; and 24% hydrogen peroxide for 1 min. After a silane coupling agent was applied for 1 min and all posts were cemented using self-adhesive resin cement (RelyX Unicem, 3M-ESPE). The roots were sectioned and two 1-mm-thick slices were obtained from each third: cervical, middle and apical. The specimens were subjected to the push-out test with a crosshead speed of 0.5 mm/min. Data were analyzed by repeated measures ANOVA followed by Tukey's HSD tests (=0.05). The surface treatment (p<0.001) and root third region (p=0.007) factors were significant. The retention to root canal was affected by surface treatment type. The post surface treatment with 24% hydrogen peroxide for 1 min yielded significantly higher bond strength when the fiberglass posts were cemented with RelyX Unicem.
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49
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Amade ES, Novais VR, Roscoe MG, Azevedo FMF, Bicalho AA, Soares CJ. Root Dentin Strain and Temperature Rise During Endodontic Treatment and Post Rehabilitation. Braz Dent J 2013; 24:591-8. [DOI: 10.1590/0103-6440201302268] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Accepted: 11/07/2013] [Indexed: 11/21/2022] Open
Abstract
This study investigated the effects of endodontic treatment procedures and different post systems rehabilitation steps on the strain and temperature rise on apical and cervical root dentin regions. Twenty-one extracted human canine teeth had two strain gages attached to the distal root surface and two thermocouples attached to the mesial root surface (cervical and apical). The strain and temperature rise were recorded during the following procedures: root canal preparation, final rinse and drying, root canal filling and canal relief. Then the teeth were divided into three groups (n=7), according to the type of post system: CPC, cast post and core; FGP, fiberglass post; and PSP, prefabricated steel post. Data continued to be recorded during the post space preparation, post modeling (only for CPC), post trying and post cementation. Data were subjected to a two-way ANOVA followed by Tukey's test (α=0.05). The post-space preparation caused the highest temperature rise (4.0-14.9 °C) and the highest strain in the apical region during irrespective of post type. The resin cement light-activation resulted in significant temperature increases in the cervical region for all of the groups. The canal relief and the post-space preparation produced highest temperature rises. The CPC post modeling resulted in higher root strain level similarly the level of post preparation. The PSP resulted in highest strain during post trying and post cementation.
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Affiliation(s)
- Euridsse Sulemane Amade
- UFU - Federal University of Uberlandia, Brazil; ISCTEM - Institute of Sciences and Technology of Mozambique, Mozambique
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Effects of post surface treatments including Er:YAG laser with different parameters on the pull-out bond strength of the fiber posts. Lasers Med Sci 2013; 29:1569-74. [DOI: 10.1007/s10103-013-1485-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Accepted: 10/30/2013] [Indexed: 10/26/2022]
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