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SILVA RVDR, JARROS IC, DEL BEL CURY AA, SIDHU SK, SILVA S, NEGRI MFN, PASCOTTO RC. Evaluation of biofilm formation on acrylic resin surfaces coated with silicon dioxide: an in situ study. Braz Oral Res 2022; 36:e007. [DOI: 10.1590/1807-3107bor-2022.vol36.0007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 07/05/2021] [Indexed: 11/21/2022] Open
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Lacerda-Santos R, Lima ABL, Penha ESDA, Santos AD, Carvalho FG, Pithon MM, Dantas AFM. In vivo biocompatibility of silicon dioxide nanofilm used as antimicrobial agent on acrylic surface. AN ACAD BRAS CIENC 2020; 92:e20181120. [PMID: 32321020 DOI: 10.1590/0001-3765202020181120] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 10/11/2019] [Indexed: 11/22/2022] Open
Abstract
the focus ofthis study was to testthe hypothesisthatthere would be no difference betweenthe biocompatibility of silicon dioxide nanofilms used as antimicrobial agents. Sixty male Wistar rats were divided into 4 groups (n=15): Group C (Control,Polyethylene), Group AR (Acrylic Resin), Group NP (Acrylic Resin coated with NP-Liquid), Group BG (Acrylic Resin coated with Bacterlon).the animals were sacrificed with 7,15 and 30 days and tissues analyzed as regardsthe events of inflammatory infiltrate, edema, necrosis, granulation tissue, mutinucleated giant cells, fibroblasts and collagen. Kruskal-Wallis and Dunn tests was used (P<0.05). Intense inflammatory infiltrate was shown mainly in Groups BG and AR, with significant difference from Control Group inthe time interval of 7days (P=0.004). Necrosis demonstrated significant difference between Group BG and Control Group (P<0.05) inthe time intervals of 7 days. For collagen fibers,there was significant difference betweenthe Control Group and Groups AR and BG inthe time interval of 7 days (P=0.006), and between BG and Control Groups inthe time intervals of 15 days (P=0.010).the hypothesis was rejected. Bacterlon demonstratedthe lowest level, and NP-Liquid Glassthe highest level of tissue compatibility, and best cell repair.the coating with NP-Liquid Glass was demonstrated to be highly promising for clinical use.
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Affiliation(s)
- Rogério Lacerda-Santos
- Universidade Federal de Juiz de For a/UFJF, Instituto de Ciências da Vida, Faculdade de Odontologia, Departamento de Ortodontia e Odontopediatria, Av. Doutor Raimundo Monteiro Rezende, nº 330, Centro, 35010-177 Governador Valadares, MG, Brazil
| | - Antonia Bárbara L Lima
- Universidade Federal de Campina Grande/UFCG, Faculdade de Odontologia, Departamento de Ortodontia e Odontopediatria, Av. dos Universitários, s/n, Rodovia Patos/Teixeira, Km 1, Santa Cecília, 58708-110 Patos, PB, Brazil
| | - Elizandra S DA Penha
- Universidade Federal de Campina Grande/UFCG, Faculdade de Odontologia, Departamento de Ortodontia e Odontopediatria, Av. dos Universitários, s/n, Rodovia Patos/Teixeira, Km 1, Santa Cecília, 58708-110 Patos, PB, Brazil
| | - Antonielson Dos Santos
- Universidade Federal de Campina Grande/UFCG, Faculdade de Medicina Veterinária, Departamento de Patologia, Av. dos Universitários, s/n, Rodovia Patos/Teixeira, Km 1, Santa Cecília, 58708-110 Patos, PB, Brazil
| | - Fabíola G Carvalho
- Universidade Federal de Juiz de For a/UFJF, Instituto de Ciências da Vida, Faculdade de Odontologia, Departamento de Ortodontia e Odontopediatria, Av. Doutor Raimundo Monteiro Rezende, nº 330, Centro, 35010-177 Governador Valadares, MG, Brazil
| | - Matheus M Pithon
- Universidade Estadual do Sudoeste da Bahia/UESB, Faculdade de Odontologia, Departamento de Ortodontia e Odontopediatria, Av. José Moreira Sobrinho, s/n, Jequiezinho, 45205-490 Jequié, BA, Brazil
| | - Antônio Flávio M Dantas
- Universidade Federal de Campina Grande/UFCG, Faculdade de Medicina Veterinária, Departamento de Patologia, Av. dos Universitários, s/n, Rodovia Patos/Teixeira, Km 1, Santa Cecília, 58708-110 Patos, PB, Brazil
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Cumerlato M, Lima EMD, Osorio LB, Mota EG, Menezes LMD, Rizzatto SMD. Effect of surface treatment of prefabricated teeth on shear bond strength of orthodontic brackets. Dental Press J Orthod 2018; 22:47-52. [PMID: 28902249 PMCID: PMC5573010 DOI: 10.1590/2177-6709.22.4.047-052.oar] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 01/10/2017] [Indexed: 12/05/2022] Open
Abstract
Objective: The aim of this in vitro study was to evaluate and compare the effects of grinding, drilling, sandblasting, and ageing prefabricated teeth (PfT) on the shear bond strength (SBS) of orthodontic brackets, as well as the effects of surface treatments on the adhesive remnant index (ARI). Methods: One-hundred-ninety-two PfT were divided into four groups (n = 48): Group 1, no surface treatment was done; Group 2, grinding was performed with a cylindrical diamond bur; Group 3, two drillings were done with a spherical diamond bur; Group 4, sandblasting was performed with 50-µm aluminum oxide. Before the experiment, half of the samples stayed immersed in distilled water at 37oC for 90 days. Brackets were bonded with Transbond XT and shear strength tests were carried out using a universal testing machine. SBS were compared by surface treatment and by ageing with two-way ANOVA, followed by Tukey’s test. ARI scores were compared between surface treatments with Kruskal-Wallis test followed by Dunn’s test. Results: Surface treatments on PfT enhanced SBS of brackets (p< 0.01), result not observed with ageing (p= 0.45). Groups II, III, and IV showed higher SBS and greater ARI than the Group 1 (p< 0.05). SBS was greater in the groups 3 and 4 (drilling, sandblasting) than in the Group 2 (grinding) (p< 0.05). SBS and ARI showed a positive correlation (Spearman’s R2= 0.57; p< 0.05). Conclusion: Surface treatment on PfT enhanced SBS of brackets, however ageing did not show any relevance. Sandblasting and drilling showed greater SBS than grinding. There was a positive correlation between SBS and ARI.
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Affiliation(s)
- Marina Cumerlato
- Pontifícia Universidade Católica do Rio Grande do Sul, Faculdade de Odontologia (Porto Alegre/RS, Brasil)
| | - Eduardo Martinelli de Lima
- Pontifícia Universidade Católica do Rio Grande do Sul, Faculdade de Odontologia, Disciplina de Ortodontia (Porto Alegre/RS, Brasil)
| | - Leandro Berni Osorio
- Universidade Federal de Santa Maria, Faculdade de Odontologia, Departamento de Estomatologia (Santa Maria/RS, Brasil)
| | - Eduardo Gonçalves Mota
- Pontifícia Universidade Católica do Rio Grande do Sul, Faculdade de Odontologia, Disciplina de Materiais Dentários (Porto Alegre/RS, Brasil)
| | - Luciane Macedo de Menezes
- Pontifícia Universidade Católica do Rio Grande do Sul, Faculdade de Odontologia, Disciplina de Ortodontia (Porto Alegre/RS, Brasil)
| | - Susana Maria Deon Rizzatto
- Pontifícia Universidade Católica do Rio Grande do Sul, Faculdade de Odontologia, Disciplina de Ortodontia (Porto Alegre/RS, Brasil)
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Consani RLX, Folli BL, Nogueira MCF, Correr AB, Mesquita MF. Effect of Polymerization Cycles on Gloss, Roughness, Hardness and Impact Strength of Acrylic Resins. Braz Dent J 2017; 27:176-80. [PMID: 27058380 DOI: 10.1590/0103-6440201600733] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 02/17/2016] [Indexed: 11/22/2022] Open
Abstract
The aim of this study was to evaluate the conventional and boiled polymerization cycles on gloss, roughness, hardness and impact strength of acrylic resins. Samples were made for each Classico and QC-20 materials (n=10) in dental stone molds obtained from rectangular metallic matrices embedded in metallic flasks. The powder-liquid ratio and manipulation of the acrylic resins' were accomplished according to manufacturers' instructions and the resins were conventionally packed in metallic flasks. After polymerization by (1) conventional: 74 °C for 9 h (Classico) and (2) boiled: 20 min (QC-20) cycles, the samples were deflasked after cooling at room temperature and conventionally finished and polished. The properties were evaluated after storage in water at 37 °C for 24 h. Gloss was verified with Multi Gloss 268 meter (Konica Minolta), surface roughness was measured with Surfcorder SE 1700 rugosimeter (Kosaka), Knoop hardness number was obtained with HMV-200 microdurometer, and impact strength was measured in an Otto Wolpert-Werke device by Charpy system (40 kpcm). Data were subjected to Student's t-test (at α=0.05). The results were: Gloss: 67.7 and 62.2 for Classico and QC-20 resins, respectively; Surface roughness: 0.874 and 1.469 Ra-µm for Classico and QC-20, respectively; Knoop hardness: 27.4 and 26.9 for Classico and QC-20, respectively; and Impact strength: 37.6 and 33.6 kgf/cm2 for Classico and QC-20, respectively. No statistically significant difference (p>0.05)were found between the resins for the evaluated properties. In conclusion, conventional and boiled polymerization cycles had similar effects on gloss, roughness, hardness and impact strength of both Classico and QC-20 resins.
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Affiliation(s)
- Rafael Leonardo Xediek Consani
- Department of Prosthodontics and Periodontology, Dental School of Piracicaba, Universidade Estadual de Campinas, Piracicaba, SP, Brazil
| | - Bianca L Folli
- Dental School of Piracicaba, Universidade Estadual de Campinas, Piracicaba, SP, Brazil
| | - Moises C F Nogueira
- Dental School of Piracicaba, Universidade Estadual de Campinas, Piracicaba, SP, Brazil
| | - Americo Bortolazzo Correr
- Department of Restorative Dentistry, Dental School of Piracicaba, Universidade Estadual de Campinas, Piracicaba, SP, Brazil
| | - Marcelo F Mesquita
- Department of Prosthodontics and Periodontology, Dental School of Piracicaba, Universidade Estadual de Campinas, Piracicaba, SP, Brazil
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de Castro DT, Valente MLC, da Silva CHL, Watanabe E, Siqueira RL, Schiavon MA, Alves OL, Dos Reis AC. Evaluation of antibiofilm and mechanical properties of new nanocomposites based on acrylic resins and silver vanadate nanoparticles. Arch Oral Biol 2016; 67:46-53. [PMID: 27023401 DOI: 10.1016/j.archoralbio.2016.03.002] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 12/09/2015] [Accepted: 03/12/2016] [Indexed: 11/16/2022]
Abstract
OBJECTIVE The purpose of this study was evaluate, for the first time, the impact of incorporation of nanostructured silver vanadate (β-AgVO3) in antibiofilm and mechanical properties of dental acrylic resins (poly(methyl methacrylate), PMMA). DESIGN The β-AgVO3 was synthesized and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy, and microanalysis (SEM/EDS). Resins specimens were prepared with 0-10% wt.% β-AgVO3 and characterized by SEM, XRD and optical microscopy. The antibiofim activity of the samples against Candida albicans and Streptococcus mutans was investigated by XTT reduction test, colony-forming units (CFUs), and confocal laser scanning microscopy (CLSM). The flexural strength, hardness, and surface roughness of the samples containing β-AgVO3 were compared with the pure PMMA matrix. RESULTS The incorporation of 10% β-AgVO3 significantly reduced the metabolic activity of C. albicans and S. mutans (p<0.05). There was a reduction in microbial load (CFU/mL) of microorganisms for the different concentrations used (p<0.05), which was confirmed by confocal microscopy. The addition of β-AgVO3 did not change the mechanical properties of hardness and surface roughness of the resins (p>0.05). However, flexural strength decreased with the addition of amounts greater than 1% (p<0.05). CONCLUSIONS β-AgVO3 additions in dental acrylic resin may have an impact on inhibition of biofilm of main microorganisms associated with dental prostheses. However, the viability of clinical use should be evaluated in function of changed promoted in some mechanical properties.
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Affiliation(s)
- Denise T de Castro
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, USP-University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Mariana L C Valente
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, USP-University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Cláudia H L da Silva
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, USP-University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Evandro Watanabe
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, USP-University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Renato L Siqueira
- Postgraduate Program in Materials Science and Engineering-PPG-CEM, Federal University of São Carlos-UFSCAR, São Carlos, SP, Brazil
| | - Marco A Schiavon
- Department of Natural Sciences, GPQM -Research Group of Materials Chemistry, Federal University of São João del Rei-UFSJ, São João del Rei, MG, Brazil
| | - Oswaldo Luiz Alves
- Laboratory of Solid State Chemistry, State University of Campinas (UNICAMP), Campinas, Brazil
| | - Andréa C Dos Reis
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, USP-University of São Paulo, Ribeirão Preto, SP, Brazil.
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