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Cândido BD, Manzoli TM, Zaniboni JF, Besegato JF, Godoy EF, Kuga MC, Dantas AAR. Effect of antioxidants after post-space irrigation on the adhesive interface of glass fiber post cementation. J ESTHET RESTOR DENT 2023; 35:1293-1300. [PMID: 37452639 DOI: 10.1111/jerd.13081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 06/06/2023] [Accepted: 06/15/2023] [Indexed: 07/18/2023]
Abstract
OBJECTIVE This study evaluated the effects of antioxidants, 10% sodium ascorbate (SA) or 20% alpha-tocopherol (AT), after post-space irrigation with 2.5% sodium hypochlorite +17% EDTA (SH) or 1% peracetic acid (PA) on the adhesive interface after glass fiber post cementation. MATERIALS AND METHODS Sixty bovine roots were endodontically treated. After preparation, the post-space was irrigated with SH or PA followed or not by the use of antioxidants (SA or AT) (n = 10). Push-out bond strength test, failure mode, and dentin penetrability analysis using confocal laser microscope were performed in the cervical, middle, and apical thirds. Data from bond strength and dentinal penetrability were evaluated by one-way ANOVA and Tukey post hoc test (p < 0.05). RESULTS SH showed the lowest bond strength regardless of the third (p < 0.05). In apical third, mixed failure was the most incident in all groups. Only in the cervical third of the post-space, SH-AT provided the greatest tag extension of the cementation system into dentin (p < 0.05). However, in the middle and apical thirds, SH-AT, SH-SA, and PA-SA provided the largest tag extensions (p < 0.05), but similar to each other (p > 0.05). CONCLUSIONS The use of antioxidants only favored bond strength when SH was used and dentin penetrability of the adhesive and conventional resin cementation, regardless of the solution used to irrigate the post-space. CLINICAL SIGNIFICANCE The use of antioxidants (10% sodium ascorbate and 20% alpha-tocopherol) after post-space irrigation with sodium hypochlorite appears to increase the bond strength favoring the glass fiber post-cementation.
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Affiliation(s)
- Beatriz Dansini Cândido
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil
| | - Tatiane Miranda Manzoli
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil
| | - Joissi Ferrari Zaniboni
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil
| | - João Felipe Besegato
- School of Dentistry (FAODO), Federal University of Mato Grosso do Sul (UFMS), Campo Grande, MS, Brazil
| | | | - Milton Carlos Kuga
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil
| | - Andréa Abi Rached Dantas
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil
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Costa JLDSG, Manzoli TM, Besegato JF, Zaniboni JF, Oliveira ECGDE, Galvani LD, Dantas AAR, Vaz LG, Kuga MC. Effect of sodium hypochlorite-based formulations on the adhesion interface after fiber post cementation. Dent Mater J 2023; 42:878-885. [PMID: 37793825 DOI: 10.4012/dmj.2023-086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
The study evaluated the persistence of residues, bond strength and tags formation of a cementation system after post-space irrigation with different sodium hypochlorite-based irrigants. The groups were divided according to the irrigation protocol (DW: distilled water; SHS: sodium hypochlorite solution; SHG: sodium hypochlorite gel; and, SHT: sodium hypochlorite with surfactant). Forty roots (n=10) were used to evaluate the persistence of residues by scanning electron microscopy. Other forty roots were used to the push-out bond strength test, failure mode and tag formation analyses. Non-parametric data were submitted to Kruskal Wallis and Dunn tests, while parametric data were evaluated by one-way ANOVA. No difference was observed in the persistence of residues. DW showed the highest bond strength and tag formation. Type 2 failure mode was the most frequent in the experimental groups. Compared to control, SHT showed the best performance, since less negative effects on adhesive interface was observed.
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Affiliation(s)
| | - Tatiane Miranda Manzoli
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University (UNESP)
| | | | - Joissi Ferrari Zaniboni
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University (UNESP)
| | | | - Lucas David Galvani
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University (UNESP)
| | - Andréa Abi Rached Dantas
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University (UNESP)
| | - Luis Geraldo Vaz
- Department of Dental Materials and Prosthodontics, School of Dentistry, São Paulo State University (UNESP)
| | - Milton Carlos Kuga
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University (UNESP)
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Zaniboni JF, Silva AM, Fernández E, de Melo Alencar C, Morais JMP, de Campos EA, Kuga MC. Temporary cement residues affect the bond strength and dentin penetration of self-adhesive resin cement in fiberglass post cementation. Microsc Res Tech 2021; 84:2351-2360. [PMID: 33960585 DOI: 10.1002/jemt.23789] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/25/2021] [Accepted: 04/10/2021] [Indexed: 11/09/2022]
Abstract
This study evaluated the persistence of eugenol-containing (PR, Provy) or eugenol-free (RT, Relyx Temp, and TB, Temp Bond) temporary cement residues and its effects on push-out bond strength and dentinal penetration of the self-adhesive resin cement (Relyx U200). Eighty human roots were endodontically treated and post space prepared. Fourty specimens were distributed in four groups (n = 10): Control (CO), without any clinical procedure, PR, RT, and TB, where a metallic post was cemented with one of the temporary cements. After metallic post removal, hemi sections post space were submitted to SEM analysis. Another specimens were distributed in similar groups, but fiberglass post was cemented using Relyx U200 cement and submitted to push-out bond strength and dentinal penetration cement analysis, in post space thirds. SEM analysis were evaluated by Kruskal-Wallis and Dunn tests, while bond strength and dentinal penetration were evaluated by ANOVA One-Way and Tukey test (p < .05). Only in apical thirds, PR, RT, and TB showed higher persistence of residues than CO. In bond strength, PR, RT, and TB showed lower values than CO, in all post space thirds (p < .05). But to dentinal penetration, PR, RT, and TB presented lower values than CO only in apical thirds (p < .05). There is the greatest persistence of temporary cement residues only in apical post space third, providing less dentinal penetration of the self-adhesive resinous cement. However, the previous use of temporary cements has negative effects on the bond strength cementation system, regardless of the third evaluated.
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Affiliation(s)
- Joissi Ferrari Zaniboni
- Department of Restorative Dentistry, Araraquara Dental School, Sao Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Aryvelto Miranda Silva
- Department of Restorative Dentistry, Araraquara Dental School, Sao Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Eduardo Fernández
- Department of Restorative Dentistry, Faculty of Dentistry, University of Chile, Santiago, Chile.,Instituto de Ciencias Biomédicas, Universidad Autónoma de Chile, Santiago, Chile
| | - Cristiane de Melo Alencar
- Department of Restorative Dentistry, Araraquara Dental School, Sao Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Jéssika Mayhara Pereira Morais
- Department of Restorative Dentistry, Araraquara Dental School, Sao Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Edson Alves de Campos
- Department of Restorative Dentistry, Araraquara Dental School, Sao Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Milton Carlos Kuga
- Department of Restorative Dentistry, Araraquara Dental School, Sao Paulo State University - UNESP, Araraquara, São Paulo, Brazil
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Machado MEL, Veintimilla Lozada VN, Carrillo Rengifo KJ, Guillén REG, Caballero-Flores H, Nabeshima CK. Confocal laser scanning microscopic analysis of the penetration of an epoxy resin-based sealer into dentinal tubules after calcium hydroxide dressing. AUST ENDOD J 2021; 47:480-486. [PMID: 33769648 DOI: 10.1111/aej.12508] [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: 10/21/2020] [Revised: 01/31/2021] [Accepted: 03/02/2021] [Indexed: 11/28/2022]
Abstract
This study assessed the penetration of an epoxy resin-based sealer into dentinal tubules of root canals previously medicated with calcium hydroxide. Sixteen palatal root canals of upper molars were instrumented and distributed into two groups: (G1) root canals medicated with calcium hydroxide and obturated after its removal; (G2) root canals obturated without the use of dressing. Sealer mixed with rhodamine B provided fluorescence for confocal laser scanning microscopy. Measurements of area and linear penetration of the sealer were assessed in three thirds by ImageJ software. The data were statistically compared by Kruskal-Wallis, Dunn's and Mann-Whitney U tests (P < 0.01). The calcium hydroxide decreased the penetration of the sealer. The coronal and middle thirds had similar areas and linear penetrations in both groups, whereas the apical third had less penetration. In conclusion, the penetration of the epoxy resin-based sealer is influenced by the calcium hydroxide dressing used between appointments.
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Affiliation(s)
- Manoel E L Machado
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | | | | | | | - Hector Caballero-Flores
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Cleber Keiti Nabeshima
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, Brazil
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Muduroglu R, Ionescu AC, Del Fabbro M, Scolavino S, Brambilla E. Distribution of adhesive layer in class II composite resin restorations before/after interproximal matrix application. J Dent 2020; 103:103494. [DOI: 10.1016/j.jdent.2020.103494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 09/28/2020] [Accepted: 10/03/2020] [Indexed: 12/15/2022] Open
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Wang L, Freitas MCCDA, Prakki A, Mosquim V, González AHM, Rios D, Honório HM. Experimental self-etching resin infiltrants on the treatment of simulated carious white spot lesions. J Mech Behav Biomed Mater 2020; 113:104146. [PMID: 33125956 DOI: 10.1016/j.jmbbm.2020.104146] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 10/12/2020] [Accepted: 10/13/2020] [Indexed: 11/16/2022]
Abstract
OBJECTIVES To evaluate the penetration depth (μm) of experimental resin infiltrants containing different percentages of triethylene glycol dimethacrylate (TEGDMA) and phosphoric acid 2-hydroxyethyl methacrylate ester (PAM) in artificial carious white spot lesions (WSL). METHODS WSL were produced in 65 bovine flat enamel specimens by pH cycling protocol, which were treated with either Icon (control) or experimental acidic infiltrants based on different percentages of TEGDMA and PAM monomers (acidic), and their association or not with previous acid-etching with phosphoric acid. Ten readings using Confocal Laser Scanning Microscopy were conducted on each specimen and the penetration depth was calculated from the surface until the deepest point with the fluorescent dye Rhodamine B (0.02 mg/mL). The pH and the viscosity of the experimental infiltrants were also tested. Data were statistically analyzed with two-way ANOVA and Tukey tests (α < 0.05). RESULTS The material factor and the interaction material*acid-etching were statistically significant. The lowest penetration depth was observed for the samples treated with the commercial infiltrant after etching with 15% hydrochloric acid. When specimens were pre-treated with PA, highest penetration was seen for specimens treated with 100% TEGDMA, which differed from all other groups. The lowest penetration was seen for those treated with 50:50 TEGDMA:PAM infiltrants. When specimens were not previously etched, highest penetration was seen for Icon, which differed only from those treated with 25% TEGDMA 75% PAM, where the lowest values were seen. The values of viscosity increased and the pH decreased with the addition of PAM in the infiltrant formulations. CONCLUSION the association between TEGDMA and PAM seems to allow similar infiltration depth reached by Icon infiltrant without acid etching the enamel surface.
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Affiliation(s)
- Linda Wang
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru-SP, Brazil.
| | - Maria Cristina Carvalho de Almendra Freitas
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru-SP, Brazil; DeVry FACID, DeVry Education Group, Teresina-PI, Brazil
| | - Anuradha Prakki
- Faculty of Dentistry, University of Toronto, Restorative Department, Toronto-ON, Canada
| | - Victor Mosquim
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru-SP, Brazil
| | | | - Daniela Rios
- Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru School of Dentistry, University of São Paulo, Bauru-SP, Brazil
| | - Heitor Marques Honório
- Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru School of Dentistry, University of São Paulo, Bauru-SP, Brazil
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Tedesco M, Chain MC, Felippe WT, Alves AMH, Garcia LDFR, Bortoluzzi EA, Cordeiro MR, Teixeira CS. Correlation between Bond Strength to Dentin and Sealers Penetration by Push-Out Test and CLSM Analysis. Braz Dent J 2019; 30:555-562. [PMID: 31800749 DOI: 10.1590/0103-6440201902766] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 05/19/2019] [Indexed: 11/21/2022] Open
Abstract
This study correlated the bond strength (BS) and dentin penetration of different sealers by push-out test and Confocal Laser Scanning Microscopy (CLSM) analysis. Forty-five root canals were prepared according to the crown-down technique and filled with gutta-percha associated to the following sealers (n=15): Endofill, AH Plus and MTA Fillapex. Five canals of each group were filled with the sealers added with 0.1% Rhodamine B dye. Next, the specimens were transversely sectioned and submitted to the push-out test (n=10) and CLSM analysis (n=5). The BS data showed the following means (MPa) and standard deviation: AH Plus (4.17±1.86); MTA Fillapex (3.13±1.96) and Endofill (2.10±1.03). Statistical analysis (two-way ANOVA, α=0.05) showed significant difference among sealers (p<0.001) and root canal thirds (p<0.001). The BS results of Endofill and MTA Fillapex were statistically similar (p>0.05), however, they were statistically different from AH Plus (p<0.001). The regional analysis of BS showed similarity between middle and apical thirds (p>0.05), and both were different from coronal portion (p<0.001). CLSM analysis verified tags formation in all groups and higher penetration of the specimens filled with AH Plus (p<0.05). The Kendall test (correlation between BS to dentin and sealer penetration into dentinal tubules) and the Pearson test (between failures pattern and sealer penetration into dentinal tubules) did not show correlation between the variables evaluated for all the tested sealers (p>0.05). AH Plus group had higher BS to dentin, and deeper tags formation than the other sealers. There was no significant correlation between BS and intratubular penetration of the tested sealers.
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Affiliation(s)
- Maybell Tedesco
- Department of Dentistry, Endodontics Division, Health Sciences Center, UFSC - Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Marcelo Carvalho Chain
- Department of Dentistry, Endodontics Division, Health Sciences Center, UFSC - Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Wilson Tadeu Felippe
- Department of Dentistry, Endodontics Division, Health Sciences Center, UFSC - Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Ana Maria Hecke Alves
- Department of Dentistry, Endodontics Division, Health Sciences Center, UFSC - Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Lucas da Fonseca Roberti Garcia
- Department of Dentistry, Endodontics Division, Health Sciences Center, UFSC - Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Eduardo Antunes Bortoluzzi
- Department of Dentistry, Endodontics Division, Health Sciences Center, UFSC - Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Mabel Rodriguez Cordeiro
- Department of Morphological Sciences, UFSC - Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Cleonice Silveira Teixeira
- Department of Dentistry, Endodontics Division, Health Sciences Center, UFSC - Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
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Lorenzetti CC, Bortolatto JF, Ramos ATPR, Shinohara AL, Saad JRC, Kuga MC. The effectiveness of glass ionomer cement as a fiber post cementation system in endodontically treated teeth. Microsc Res Tech 2019; 82:1191-1197. [PMID: 30920097 DOI: 10.1002/jemt.23268] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 02/19/2019] [Accepted: 03/11/2019] [Indexed: 11/10/2022]
Abstract
This study compared the performance of a glass ionomer (GC Gold Label 1, GIC) as a fiber post cementation system for glass fiber posts with a self-adhesive resin cement (Relyx U200, RUC) and a conventional resin cement system (Scotchbond Muli-Purpose and Relyx ARC, RAC). Thirty endodontically treated canines were randomly divided in three groups (n = 10), according to the fiber post cementation system: (RAC)-Scotchbond Multi-Purpose and Relyx X ARC; (RUC)-Relyx U200 and (GIC)-GC Gold Label 1 Luting & Lining. Rhodamine was incorporated into the cementation system prior to the fiber post cementation. After glass fiber post cementation, roots were incubated in artificial saliva for 6 months. After that, specimens from the cervical, middle, and apical thirds of the post space were prepared and analyzed using a push-out bond strength test and confocal laser microscopy. ANOVA one way and Tukey tests showed that GIC and RUC demonstrated similar push-out bond strength values, independently of the post space third (p > .05); however, values were greater than those shown by RAC (p < .05). For dentin penetrability, GIC and RUC also had similar results (p > 0.05) and lower than RAC (p < 0.05). Inside the root canal, the cementation system using glass ionomer cement (GC Gold Label 1 Luting & Lining) has similar push-out bond strength to the self-adhesive resin cement (Relyx U200) and these were higher than the conventional resin (Relyx ARC), despite its higher dentin penetrability.
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Affiliation(s)
- Camila C Lorenzetti
- Department of Restorative Dentistry, Araraquara School of Dentistry, University of Sao Paulo State, Araraquara, Brazil
| | | | - Anna T P R Ramos
- Department of Restorative Dentistry, Araraquara School of Dentistry, University of Sao Paulo State, Araraquara, Brazil
| | - André L Shinohara
- Department of Biological Sciences, Bauru Dental School, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Jose R C Saad
- Department of Restorative Dentistry, Araraquara School of Dentistry, University of Sao Paulo State, Araraquara, Brazil
| | - Milton C Kuga
- Department of Restorative Dentistry, Araraquara School of Dentistry, University of Sao Paulo State, Araraquara, Brazil
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Machado CM, Bim Júnior O, Giacomini MC, Graeff MSZ, Garcia FCP, Rios D, Honório HM, Wang L. Effect of ethanol-dissolved rhodamine B marker on mechanical properties of non-simplified adhesives. J Mech Behav Biomed Mater 2018; 84:145-150. [DOI: 10.1016/j.jmbbm.2018.05.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 05/05/2018] [Accepted: 05/08/2018] [Indexed: 10/16/2022]
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Botelho MPJ, Isolan CP, Schwantz JK, Lopes MB, Moraes RRD. Rubbing time and bonding performance of one-step adhesives to primary enamel and dentin. J Appl Oral Sci 2017; 25:523-532. [PMID: 29069150 PMCID: PMC5804389 DOI: 10.1590/1678-7757-2016-0627] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 04/02/2017] [Indexed: 05/29/2023] Open
Abstract
Objectives: This study investigated whether increasing the concentration of acidic monomers in one-step adhesives would allow reducing their application time without interfering with the bonding ability to primary enamel and dentin. Material and methods: Experimental one-step self-etch adhesives were formulated with 5 wt% (AD5), 20 wt% (AD20), or 35 wt% (AD35) acidic monomer. The adhesives were applied using rubbing motion for 5, 10, or 20 s. Bond strengths to primary enamel and dentin were tested under shear stress. A commercial etch-and-rinse adhesive (Single Bond 2; 3M ESPE) served as reference. Scanning electron microscopy was used to observe the morphology of bonded interfaces. Data were analysed at p<0.05. Results: In enamel, AD35 had higher bond strength when rubbed for at least 10 s, while application for 5 s generated lower bond strength. In dentin, increased acidic monomer improved bonding only for 20 s rubbing time. The etch-and-rinse adhesive yielded higher bond strength to enamel and similar bonding to dentin as compared with the self-etch adhesives. The adhesive layer was thicker and more irregular for the etch-and-rinse material, with no appreciable differences among the self-etch systems. Conclusion: Overall, increasing the acidic monomer concentration only led to an increase in bond strength to enamel when the rubbing time was at least 10 s. In dentin, despite the increase in bond strength with longer rubbing times, the results favoured the experimental adhesives compared to the conventional adhesive. Reduced rubbing time of self-etch adhesives should be avoided in the clinical setup.
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Bim Júnior O, Cebim MA, Atta MT, Machado CM, Francisconi-Dos-Rios LF, Wang L. Determining Optimal Fluorescent Agent Concentrations in Dental Adhesive Resins for Imaging the Tooth/Restoration Interface. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2017; 23:122-130. [PMID: 28228165 DOI: 10.1017/s143192761601271x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Fluorescent dyes like Rhodamine B (RB) have been used to identify the spatial distribution of adhesive restorative materials in the tooth/restoration interface. Potential effects of the addition of RB to dental adhesives were addressed in the past, but no further information is available on how to determine suitable concentrations of RB in these bonding agents for imaging in the confocal laser scanning microscope. This study provides systematical strategies for adding RB to viscous dental adhesive resins, focusing on the determination of the lowest range of dye concentrations necessary to achieve an acceptable image of the dentin/adhesive interface. It was demonstrated that optimized images of the resin distribution in dentin can be produced with 0.1-0.02 mg/mL of RB in the (tested) adhesives. Our approaches took into account aspects related to the dye concentration, photophysical parameters in different host media, specimen composition and morphology to develop a rational use of the fluorescent agent with the resin-based materials. Information gained from this work can help optimize labeling methods using dispersions of low-molecular-weight dyes in different monomer blend systems.
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Affiliation(s)
- Odair Bim Júnior
- 1Department of Operative Dentistry,Endodontics and Dental Materials,Bauru School of Dentistry,University of São Paulo,Bauru,17012-901 SP,Brazil
| | - Marco A Cebim
- 2Department of Inorganic Chemistry,Institute of Chemistry,Universidade Estadual Paulista,Araraquara,14800-060 SP,Brazil
| | - Maria T Atta
- 1Department of Operative Dentistry,Endodontics and Dental Materials,Bauru School of Dentistry,University of São Paulo,Bauru,17012-901 SP,Brazil
| | - Camila M Machado
- 3Department of Prosthodontics,Bauru School of Dentistry, University of São Paulo, Bauru,17012-901 SP,Brazil
| | | | - Linda Wang
- 1Department of Operative Dentistry,Endodontics and Dental Materials,Bauru School of Dentistry,University of São Paulo,Bauru,17012-901 SP,Brazil
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