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Sahm BD, Ferreira I, Carvalho-Silva JM, Teixeira ABV, Teixeira JVU, Lisboa-Filho PN, Dos Reis AC. Microstructural characterization, mechanical and microbiological properties of acrylic resins added with reduced graphene oxide. Odontology 2024:10.1007/s10266-024-00981-7. [PMID: 39046588 DOI: 10.1007/s10266-024-00981-7] [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: 12/02/2023] [Accepted: 07/05/2024] [Indexed: 07/25/2024]
Abstract
To evaluate the microstructural characterization, mechanical properties and antimicrobial activity of acrylic resins incorporated with different concentrations of reduced graphene oxide (rGO). Specimens were made of self-cured and heat-cured acrylic resins for the control group and concentrations of 0.5%, 1%, and 3%. The microstructural characterization was evaluated by scanning electron microscopy (SEM) and energy-dispersive X-ray (EDS). For mechanical testing, flexural strength, and Knoop hardness tests were performed. Microbiological evaluations were performed by colony forming units (CFU) analysis, tetrazolium salt reduction (XTT), and SEM images. The modified acrylic resins showed increased mechanical properties at low concentrations (p < 0.05) and with reduced S. mutans (p < 0.05). Reduced graphene oxide interfered with the mechanical performance and microbiological properties of acrylic resins depending on the concentration of rGO, and type of polymerization and microorganism evaluated. The incorporation of graphene compounds into acrylic resins is an alternative to improve the antimicrobial efficacy and performance of the material.
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Affiliation(s)
- Beatriz Danieletto Sahm
- Department of Dental Materials and Prosthesis, Ribeirão Preto School of Dentistry, University of São Paulo (USP), FORP-USP. Av. Do Café, s/n, Ribeirão Preto, SP, 14040-904, Brazil
| | - Izabela Ferreira
- Department of Dental Materials and Prosthesis, Ribeirão Preto School of Dentistry, University of São Paulo (USP), FORP-USP. Av. Do Café, s/n, Ribeirão Preto, SP, 14040-904, Brazil
| | - João Marcos Carvalho-Silva
- Department of Dental Materials and Prosthesis, Ribeirão Preto School of Dentistry, University of São Paulo (USP), FORP-USP. Av. Do Café, s/n, Ribeirão Preto, SP, 14040-904, Brazil
| | - Ana Beatriz Vilela Teixeira
- Department of Dental Materials and Prosthesis, Ribeirão Preto School of Dentistry, University of São Paulo (USP), FORP-USP. Av. Do Café, s/n, Ribeirão Preto, SP, 14040-904, Brazil
| | | | | | - Andréa Cândido Dos Reis
- Department of Dental Materials and Prosthesis, Ribeirão Preto School of Dentistry, University of São Paulo (USP), FORP-USP. Av. Do Café, s/n, Ribeirão Preto, SP, 14040-904, Brazil.
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Carvalho-Silva JM, Vilela Teixeira AB, Schiavon MA, Dos Reis AC. Antimicrobial gel with silver vanadate and silver nanoparticles: antifungal and physicochemical evaluation. Future Microbiol 2024:1-11. [PMID: 38979570 DOI: 10.1080/17460913.2024.2366630] [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: 03/22/2024] [Accepted: 06/07/2024] [Indexed: 07/10/2024] Open
Abstract
Aim: To develop a β-AgVO3 gel and evaluate its physicochemical stability and antifungal activity against Candida albicans. Materials & methods: The gel was prepared from the minimum inhibitory concentration (MIC) of β-AgVO3. The physicochemical stability was evaluated by centrifugation, accelerated stability (AS), storage (St), pH, syringability, viscosity and spreadability tests and antifungal activity by the agar diffusion. Results: The MIC was 62.5 μg/ml. After centrifugation, AS and St gels showed physicochemical stability. Lower viscosity and higher spreadability were observed for the higher β-AgVO3 concentration and the minimum force for extrusion was similar for all groups. Antifungal effect was observed only for the β-AgVO3 gel with 20xMIC. Conclusion: The β-AgVO3 gel showed physicochemical stability and antifungal activity.
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Affiliation(s)
- João Marcos Carvalho-Silva
- Department of Dental Materials & Prosthesis, Ribeirão Preto School of Dentistry, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Ana Beatriz Vilela Teixeira
- Department of Dental Materials & Prosthesis, Ribeirão Preto School of Dentistry, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Marco Antônio Schiavon
- Department of Natural Sciences, Federal University of São João del-Rei, São João del-Rei, Brazil
| | - Andréa Cândido Dos Reis
- Department of Dental Materials & Prosthesis, Ribeirão Preto School of Dentistry, University of São Paulo (USP), Ribeirão Preto, Brazil
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Sahm BD, Ferreira I, Carvalho-Silva JM, Vilela Teixeira AB, Uchôa Teixeira JV, Lisboa-Filho PN, Alves OL, Cândido dos Reis A. Structure-properties correlation of acrylic resins modified with silver vanadate and graphene. Heliyon 2024; 10:e32029. [PMID: 38868038 PMCID: PMC11168394 DOI: 10.1016/j.heliyon.2024.e32029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 04/26/2024] [Accepted: 05/27/2024] [Indexed: 06/14/2024] Open
Abstract
This study aimed to incorporate β-AgVO3 and rGO into self-curing (SC) and heat-curing (HC) acrylic resins and to evaluate their physicochemical, mechanical, and antimicrobial properties while correlating them with the characterized material structure. Acrylic resin samples were prepared at 0 % (control), 0.5 %, 1 %, and 3 % for both nanoparticles. The microstructural characterization was assessed by scanning electron microscopy (SEM) (n = 1) and energy dispersive X-ray spectroscopy (EDS) (n = 1). The physicochemical and mechanical tests included flexural strength (n = 10), Knoop hardness (n = 10), roughness (n = 10), wettability (n = 10), sorption (n = 10), solubility (n = 10), porosity (n = 10), and color evaluation (n = 10). The microbiological evaluation was performed by counting colony-forming units (CFU/mL) and cell viability (n = 8). The results showed that the β-AgVO3 samples showed lower counts of Candida albicans, Pseudomonas aeruginosa, and Streptococcus mutans due to their promising physicochemical properties. The mechanical properties were maintained with the addition of β-AgVO3. The rGO samples showed higher counts of microorganisms due to the increase in physicochemical properties. It can be concluded that the incorporation of β-AgVO3 into acrylic resins could be an alternative to improve the antimicrobial efficacy and performance of the material.
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Affiliation(s)
- Beatriz Danieletto Sahm
- Departament of Dental Materials and Prosthesis, Ribeirão Preto School of Dentistry, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Izabela Ferreira
- Departament of Dental Materials and Prosthesis, Ribeirão Preto School of Dentistry, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - João Marcos Carvalho-Silva
- Departament of Dental Materials and Prosthesis, Ribeirão Preto School of Dentistry, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Ana Beatriz Vilela Teixeira
- Departament of Dental Materials and Prosthesis, Ribeirão Preto School of Dentistry, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
| | | | | | - Oswaldo Luiz Alves
- Department of Inorganic Chemistry, Institute of Chemistry, State University of Campinas (UNICAMP), Campinas, Brazil
| | - Andréa Cândido dos Reis
- Departament of Dental Materials and Prosthesis, Ribeirão Preto School of Dentistry, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
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Uehara LM, Teixeira ABV, Valente MLDC, Reis ACD. Mechanical and microbiological properties of orthodontic resin modified with nanostructured silver vanadate decorated with silver nanoparticles (βAgVO 3). J Dent 2024; 145:104836. [PMID: 38199325 DOI: 10.1016/j.jdent.2024.104836] [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] [Received: 11/18/2023] [Revised: 01/03/2024] [Accepted: 01/07/2024] [Indexed: 01/12/2024] Open
Abstract
OBJECTIVE To investigate the impact of incorporating the antimicrobial nanomaterial β-AgVO3 into orthodontic resin, focusing on degree of conversion, surface characteristics, microhardness, adhesion properties, and antimicrobial activity. METHODS The 3 M Transbond XT resin underwent modification, resulting in three groups (Control, 2.5% addition, 5% addition) with 20 specimens each. Fourier transform infrared spectroscopy assessed monomer conversion. Laser confocal microscopy examined surface roughness, and microhardness was evaluated using Knoop protocols. Shear strength was measured before and after artificial aging on 36 premolar teeth. Microbiological analysis against S. mutans and S. sanguinis was conducted using the agar diffusion method. RESULTS Degree of conversion remained unaffected by time (P = 0.797), concentration (P = 0.438), or their interaction (P = 0.187). The 5% group exhibited the lowest surface roughness, differing significantly from the control group (P = 0.045). Microhardness showed no significant differences between concentrations (P = 0.740). Shear strength was highest in the control group (P < 0.001). No significant differences were observed in the samples with or without thermocycling (P = 0.759). Microbial analysis revealed concentration-dependent variations, with the 5% group exhibiting the largest inhibition halo (P < 0.001). CONCLUSIONS Incorporating β-AgVO3 at 2.5% and 5% concentrations led to significant differences in surface roughness, adhesion, and antimicrobial activity. Overall, resin modification positively impacted degree of conversion, surface characteristics, microhardness, and antimicrobial activity. Further research is warranted to determine clinically optimal concentrations that maximize antimicrobial benefits while minimizing adverse effects on adhesion properties. CLINICAL SIGNIFICANCE Incorporating β-AgVO3 into orthodontic resin could improve patient quality of life by prolonging intervention durability and reducing the impact of cariogenic microorganisms. The study's findings also hold promise for the industry, paving the way for the development of new materials with antimicrobial properties for potential applications in the health sector.
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Affiliation(s)
- Lívia Maiumi Uehara
- Master´s Degee Student, Department of Dental Materials and Prosthesis, Ribeirão Preto Dental School, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Ana Beatriz Vilela Teixeira
- Post-Doc student, Department of Dental Materials and Prosthesis, Ribeirão Preto Dental School, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Mariana Lima da Costa Valente
- Post-Doc student, Department of Dental Materials and Prosthesis, Ribeirão Preto Dental School, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Andréa Cândido Dos Reis
- Professor, Department of Dental Materials and Prosthesis, Ribeirão Preto Dental School, University of São Paulo (USP), Ribeirão Preto, SP, Brazil.
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Ferreira I, da Costa DMG, Dos Reis AC. Incorporating versus coating antimicrobials for polymethyl methacrylate: A systematic review. J Prosthet Dent 2024:S0022-3913(24)00288-9. [PMID: 38729792 DOI: 10.1016/j.prosdent.2024.04.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 04/06/2024] [Accepted: 04/10/2024] [Indexed: 05/12/2024]
Abstract
STATEMENT OF PROBLEM Incorporating and coating with antimicrobials are techniques that can confer antimicrobial action on polymethyl methacrylate (PMMA) denture bases, which can accumulate microorganisms and promote oral and systemic disease. PURPOSE The purpose of this systematic review was to answer the question: "Do techniques for incorporating and coating antimicrobial agents in PMMA promote antimicrobial action?" MATERIAL AND METHODS The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) checklist guidelines were followed, and the SCOPUS, PubMed/Medline, EMBASE, and Science Direct databases searched. The studies were selected in 2 stages, reading the titles and abstracts and then reading the selected studies in full. The risk of bias was analyzed by adapting the quasi-experimental studies tool by the Joanna Briggs Institute (JBI). RESULTS A total of 970 articles were found in the databases; 71 were duplicates and, after reading the abstracts, 38 were selected for full reading. From these, 6 were excluded because they did not fulfill the inclusion criteria, and 32 studies were included in this review. Autopolymerizing, heat- polymerizing, and light-polymerizing resins were evaluated, with the incorporating technique prevailing over the coating, but both techniques effectively promoted antimicrobial activity. CONCLUSIONS Incorporating and coating antimicrobial agents are effective methods of promoting antimicrobial activity in PMMA. Combining the 2 methods led to increased antimicrobial activity compared with each individually.
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Affiliation(s)
- Izabela Ferreira
- Undergraduate student, Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo (USP), Ribeirão Preto, Brazil
| | | | - Andrea Cândido Dos Reis
- Professor, Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo (USP), Ribeirão Preto, Brazil.
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Ferreira I, Alves OL, Schiavon MA, Reis ACD. Influence of incorporation of nanostructured silver vanadate decorated with silver nanoparticles on roughness, microhardness, and color change of pit and fissure sealants. Heliyon 2024; 10:e25525. [PMID: 38384570 PMCID: PMC10878882 DOI: 10.1016/j.heliyon.2024.e25525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 01/25/2024] [Accepted: 01/29/2024] [Indexed: 02/23/2024] Open
Abstract
Objective The aim of this study was to evaluate the roughness, hardness, and color change of pit and fissure sealants of two commercial brands (Fluroshield ™ and Ultraseal XT ™) incorporated with nanostructured silver vanadate nanomaterial decorated with silver nanoparticles (β-AgVO3) in concentrations (0% - control, 2.5% and 5%). Material and methods Two commercial brands Fluroshield TM and Ultraseal XT ™ were used to make the samples with dimensions of 6 × 6 × 4 mm. The control group was made according to the manufacturer's instructions and in the groups with the addition of β-AgVO3, the nanomaterial was added proportionally by mass at percentages of 2.5% and 5%. Roughness properties were evaluated using a 3D Laser Confocal Microscope (n = 10), Knoop microhardness by Microdurometer (n = 10), and color change by Portable Color Spectrophotometer on the CIEDE2000 system (n = 10). Data were evaluated by one-way ANOVA with Bonferroni adjustment and Tukey's mean comparison test at a 5% significance level. Results Ultraseal XT ™ sealant roughness showed a significant difference between concentrations with the highest mean for the 5% group (P = 0.010). Regarding the hardness, both sealants showed no significant difference between the groups. Fluroshield ™ sealant showed a significant difference in ΔE00 between the control-2.5% 24.93 (3.49) and control-5% 28.41 (2.58). Conclusion It may be concluded that the incorporation of β-AgVO3 influenced the increase in roughness for Ultraseal XT ™ pit and fissure sealant, did not interfere with the microhardness of both sealants, and promoted a change in the color of Fluroshield ™ sealant within clinically acceptable limits.
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Affiliation(s)
- Izabela Ferreira
- Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Oswaldo Luiz Alves
- Department of Inorganic Chemistry, Institute of Chemistry, State University of Campinas (UNICAMP), Campinas, Brazil
| | - Marco Antônio Schiavon
- Department of Natural Sciences, Federal University of São João Del-Rei (UFSJ), São João Del-Rei, Brazil
| | - Andréa Cândido dos Reis
- Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
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Relation of physicochemical properties and accumulation of microorganisms in acrylic resins with antimicrobial properties: a systematic review. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04659-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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