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Cleaver L, Garnett JA. How to study biofilms: technological advancements in clinical biofilm research. Front Cell Infect Microbiol 2023; 13:1335389. [PMID: 38156318 PMCID: PMC10753778 DOI: 10.3389/fcimb.2023.1335389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 11/30/2023] [Indexed: 12/30/2023] Open
Abstract
Biofilm formation is an important survival strategy commonly used by bacteria and fungi, which are embedded in a protective extracellular matrix of organic polymers. They are ubiquitous in nature, including humans and other animals, and they can be surface- and non-surface-associated, making them capable of growing in and on many different parts of the body. Biofilms are also complex, forming polymicrobial communities that are difficult to eradicate due to their unique growth dynamics, and clinical infections associated with biofilms are a huge burden in the healthcare setting, as they are often difficult to diagnose and to treat. Our understanding of biofilm formation and development is a fast-paced and important research focus. This review aims to describe the advancements in clinical biofilm research, including both in vitro and in vivo biofilm models, imaging techniques and techniques to analyse the biological functions of the biofilm.
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Affiliation(s)
- Leanne Cleaver
- Centre for Host-Microbiome Interactions, Faculty of Dental, Oral & Craniofacial Sciences, King’s College London, London, United Kingdom
| | - James A. Garnett
- Centre for Host-Microbiome Interactions, Faculty of Dental, Oral & Craniofacial Sciences, King’s College London, London, United Kingdom
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Brenes-Alvarado A, Soto-Montero J, Farias-da-Silva FF, Benine-Warlet J, Ribeiro AF, Groppo FC, Steiner-Oliveira C. Does potassium iodide help in the microbial reduction of oral microcosm biofilms after photodynamic therapy with methylene blue and red laser? Photodiagnosis Photodyn Ther 2022; 40:103123. [PMID: 36115559 DOI: 10.1016/j.pdpdt.2022.103123] [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: 04/29/2022] [Revised: 08/13/2022] [Accepted: 09/13/2022] [Indexed: 12/14/2022]
Abstract
OBJECTIVE To evaluate the efficacy of methylene blue (MB)-mediated antimicrobial photodynamic therapy (aPDT) doped with potassium iodide (KI) against oral microcosms biofilms cultured in dentin. METHODS A saliva-glycerol stock formed from pooled human saliva was diluted in McBain artificial saliva with 1% sucrose (1:1), inoculated on bovine dentin blocks, and refreshed daily for 5 days. The biofilms were divided (n = 9/group) and treated with 0.9% NaCl (C), 0.2% chlorhexidine (CX), 0.01% MB + low-power laser 15 J, 88 mW, 180 s (PL), and 0.01% MB + 50 mM KI + laser (PKIL). Serial dilution was performed, and cellular viability (CFU/mL) was evaluated for total microorganisms, total lactobacilli, total streptococci, and S. mutans. Additional biofilms were cultured and treated (n = 4) for biomass determination (%BMR). The microscopic structure of the biofilms was observed by SEM. One-way ANOVA and Tukey tests were conducted (α=5%). RESULTS Total microorganisms and total streptococci significantly reduced in biofilms treated with CX and PKIL when compared to C, but the CX, PKIL, and PL treatments did not differ from each other. Total lactobacilli and S. mutans showed a significant reduction in the CX, PL, and PKIL groups when compared to C, but with no difference between them. Biomass analysis showed a significantly reduction for CX and PKIL compared to C. SEM micrographs showed noticeable changes in bacterial membrane integrity for the PKIL and CX groups. CONCLUSION The addition of KI to methylene blue-mediated aPDT in microcosm biofilms was effective in reducing oral microorganisms, but the effect was group dependent.
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Affiliation(s)
- Alejandra Brenes-Alvarado
- Department of Health Sciences and Pediatric Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Av. Limeira, 901 - Areião, Piracicaba, SP 13414-903, Brazil; Department of Pediatric Dentistry and Orthodontics, School of Dentistry, University of Costa Rica, Instalaciones Deportivas, Montes de Oca, San José 11501-2060, Costa Rica
| | - Jorge Soto-Montero
- Department of Restorative Dentistry, School of Dentistry, University of Costa Rica, Instalaciones Deportivas, Montes de Oca, San José 11501-2060, Costa Rica
| | - Felipe Fabrício Farias-da-Silva
- Department of Health Sciences and Pediatric Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Av. Limeira, 901 - Areião, Piracicaba, SP 13414-903, Brazil
| | - Juliana Benine-Warlet
- Department of Health Sciences and Pediatric Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Av. Limeira, 901 - Areião, Piracicaba, SP 13414-903, Brazil
| | - Andreza Ferraz Ribeiro
- Department of Health Sciences and Pediatric Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Av. Limeira, 901 - Areião, Piracicaba, SP 13414-903, Brazil
| | - Francisco Carlos Groppo
- Department of Biosciences, Piracicaba Dental School, University of Campinas - UNICAMP, Av. Limeira, 901 - Areião, Piracicaba, SP 3414-903, Brazil
| | - Carolina Steiner-Oliveira
- Department of Health Sciences and Pediatric Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Av. Limeira, 901 - Areião, Piracicaba, SP 13414-903, Brazil.
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Levy FM, Braga AS, Pelá VT, Lavender S, Zhang D, Pilch S, Malheiros Z, Stewart B, Magalhães AC, Buzalaf MAR. Characterization of white spot lesions formed on human enamel under microcosm biofilm for different experimental periods. J Appl Oral Sci 2022; 30:e20210560. [PMID: 35384988 PMCID: PMC8983036 DOI: 10.1590/1678-7757-2021-0560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 01/20/2022] [Indexed: 12/02/2022] Open
Abstract
The initial characteristics of white spot lesion (WSLs), such as the degree of integrated mineral loss (ΔZ), depth and pattern of mineral distribution, have an impact on further demineralization and remineralization. However, these lesion parameters have not been evaluated in WSLs produced from microcosm biofilms.
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de Farias AL, Arbeláez MIA, Meneguin AB, Barud HDS, Brighenti FL. Mucoadhesive controlled-release formulations containing morin for the control of oral biofilms. BIOFOULING 2022; 38:71-83. [PMID: 34906018 DOI: 10.1080/08927014.2021.2015580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 11/30/2021] [Accepted: 12/02/2021] [Indexed: 06/14/2023]
Abstract
This study aimed to evaluate the antimicrobial and anti-biofilm activity of morin on polymicrobial biofilms and its cytotoxicity in controlled-release films and tablets based on gellan gum. Polymicrobial biofilms were formed from saliva for 48 h under an intermittent exposure regime to 1% sucrose and in contact with films or tablets of gellan gum containing 2 mg of morin each. Acidogenicity, bacterial viability, dry weight and insoluble extracellular polysaccharides from biofilms were evaluated. The cytotoxicity of morin was evaluated in oral keratinocytes. Morin released from the systems reduced the viability of all the microbial groups evaluated, as well as the dry weight and insoluble polysaccharide concentration in the matrix and promoted the control of acidogenicity when compared with the control group without the substance. Morin was cytotoxic only at the highest concentration evaluated. In conclusion, morin is an effective agent and shows antimicrobial and anti-biofilm activity against polymicrobial biofilms.
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Affiliation(s)
- Aline Leite de Farias
- Department of Morphology, Pediatric Dentistry and Orthodontics, School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil
| | - Maria Isabel Amaya Arbeláez
- Department of Dental Materials and Prosthodontics, School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil
| | - Andréia Bagliotti Meneguin
- Department of Drugs and Pharmaceuticals, School of Pharmaceutical Sciences, São Paulo State University - UNESP, Araraquara, SP, Brazil
| | - Hernane da Silva Barud
- Biopolymers and Biomaterials Laboratory (BioPolMat), University of Araraquara - UNIARA, Araraquara, SP, Brazil
| | - Fernanda Lourenção Brighenti
- Department of Morphology, Pediatric Dentistry and Orthodontics, School of Dentistry, São Paulo State University - UNESP, Araraquara, SP, Brazil
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Viana CS, Maske TT, Signori C, VAN DE Sande FH, Oliveira EFD, Cenci MS. Influence of caries activity and number of saliva donors: mineral and microbiological responses in a microcosm biofilm model. J Appl Oral Sci 2021; 29:e20200778. [PMID: 34495103 PMCID: PMC8425900 DOI: 10.1590/1678-7757-2020-0778] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 05/06/2021] [Indexed: 11/22/2022] Open
Abstract
Objective this study evaluated the mineral and microbiological response of biofilms originating from different types of saliva inoculum with distinct levels of caries activity. Methodology the biofilms grown over enamel specimens originated from saliva collected from a single donor or five donors with two distinct levels of caries activity (caries-active and caries-free) or from pooling saliva from ten donors (five caries-active and five caries-free). The percentage surface hardness change (%SHC) and microbiological counts served as outcome variables. Results the caries activity of donors did not affect the %SHC values. Inoculum from five donors compared to a single donor showed higher %SHC values (p=0.019). Higher lactobacilli counts were observed when saliva from caries-active donors was used as the inoculum (p=0.017). Pooled saliva from both caries activity levels showed higher mutans streptococci counts (p<0.017). Conclusion Overall, pooled saliva increased the mineral response of the derived biofilms, but all the inoculum conditions formed cariogenic biofilms and caries lesions independently of caries activity.
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Affiliation(s)
- Chayane Souza Viana
- Universidade Federal de Pelotas, Programa de Pós-Graduação em Odontologia, Pelotas, RS, Brasil
| | - Tamires Timm Maske
- Universidade Federal do Rio Grande do Sul, Departamento de Odontologia Preventiva e Social, Porto Alegre, RS, Brasil
| | - Cácia Signori
- Universidade Federal de Pelotas, Programa de Pós-Graduação em Odontologia, Pelotas, RS, Brasil
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de Souza BM, Silva MS, Braga AS, Bueno PSK, da Silva Santos PS, Buzalaf MAR, Magalhães AC. Protective effect of titanium tetrafluoride and silver diamine fluoride on radiation-induced dentin caries in vitro. Sci Rep 2021; 11:6083. [PMID: 33727650 PMCID: PMC7966395 DOI: 10.1038/s41598-021-85748-8] [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: 10/21/2020] [Accepted: 02/28/2021] [Indexed: 11/11/2022] Open
Abstract
This in vitro study evaluated the protective effect of titanium tetrafluoride (TiF4) varnish and silver diamine fluoride (SDF) solution on the radiation-induced dentin caries. Bovine root dentin samples were irradiated (70 Gy) and treated as follows: (6 h): 4% TiF4 varnish; 5.42% NaF varnish; 30% SDF solution; placebo varnish; or untreated (negative control). Microcosm biofilm was produced from human dental biofilm (from patients with head-neck cancer) mixed with McBain saliva for the first 8 h. After 16 h and from day 2 to day 5, McBain saliva (0.2% sucrose) was replaced daily (37 °C, 5% CO2) (biological triplicate). Demineralization was quantified by transverse microradiography (TMR), while biofilm was analyzed by using viability, colony-forming units (CFU) counting and lactic acid production assays. The data were statistically analyzed by ANOVA (p < 0.05). TiF4 and SDF were able to reduce mineral loss compared to placebo and the negative control. TiF4 and SDF significantly reduced the biofilm viability compared to negative control. TiF4 significantly reduced the CFU count of total microorganism, while only SDF affected total streptococci and mutans streptococci counts. The varnishes induced a reduction in lactic acid production compared to the negative control. TiF4 and SDF may be good alternatives to control the development of radiation-induced dentin caries.
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Affiliation(s)
- Beatriz Martines de Souza
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, São Paulo, 17012-191, Brazil
| | - Mayara Souza Silva
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, São Paulo, 17012-191, Brazil
| | - Aline Silva Braga
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, São Paulo, 17012-191, Brazil
| | - Patrícia Sanches Kerges Bueno
- Department of Surgery, Stomatology, Pathology and Radiology, Bauru School of Dentistry, University of São Paulo, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, São Paulo, 17012-191, Brazil
| | - Paulo Sergio da Silva Santos
- Department of Surgery, Stomatology, Pathology and Radiology, Bauru School of Dentistry, University of São Paulo, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, São Paulo, 17012-191, Brazil
| | - Marília Afonso Rabelo Buzalaf
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, São Paulo, 17012-191, Brazil
| | - Ana Carolina Magalhães
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, São Paulo, 17012-191, Brazil.
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Mouhat M, Moorehead R, Murdoch C. In vitro Candida albicans biofilm formation on different titanium surface topographies. Biomater Investig Dent 2020; 7:146-157. [PMID: 33134957 PMCID: PMC7580804 DOI: 10.1080/26415275.2020.1829489] [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] [Indexed: 11/23/2022] Open
Abstract
Objectives To investigate if differences in titanium implant surface topography influence Candida albicans biofilm formation. Materials and Methods Titanium discs were prepared and characterized using a profilometer: Group A (Ra 0.15 µm, smooth), Group B (Ra 0.64 µm, minimally rough) and Group C (Ra 1.3 µm, moderately rough). Contact angle and surface free energy (SFE) were determined for each group. Non-preconditioned titanium discs were incubated with C. albicans for 24 h. In additional experiments, the titanium discs were initially coated with human saliva, bovine serum albumin or phosphate-buffered saline for 2 h before incubation with C. albicans for 24 h. The amount of fungal biofilm formation was quantified using a colorimetric assay. Results C. albicans biofilm formation was significantly lower (p < 0.05) on the minimally rough titanium surface compared to smooth and moderately rough surfaces. The titanium surface displaying the lowest SFE (Group B) was associated with significantly lower (p < 0.05) C. albicans biofilm formation than the other two groups. Salivary coating resulted in greater adherence of C. albicans with increased surface roughness. Conclusions The minimally rough titanium discs displayed lowest SFE compared to smooth and moderately rough surfaces and showed the least C. albicans biofilm formation. This study demonstrated that C. albicans biofilm formation increased in a SFE-dependent manner. These findings suggest that SFE might be a more explanatory factor for C. albicans biofilm formation on titanium surfaces than roughness. The presence of a pellicle coating may negate the impact of SFE on C. albicans biofilm formation on titanium surfaces.
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Affiliation(s)
- Mathieu Mouhat
- Department for Clinical Dentistry, Faculty of Health Sciences, The Arctic University of Norway (UiT), Tromsø, Norway.,School of Clinical Dentistry, The University of Sheffield, Sheffield, UK
| | - Robert Moorehead
- The Henry Royce Institute, The University of Sheffield, Sheffield, UK
| | - Craig Murdoch
- School of Clinical Dentistry, The University of Sheffield, Sheffield, UK
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Castelo-Branco DDSCM, Amando BR, Ocadaque CJ, Aguiar LD, Paiva DDDQ, Diógenes EM, Guedes GMDM, Costa CL, Santos-Filho ASP, Andrade ARCD, Cordeiro RDA, Rocha MFG, Sidrim JJC. Mini-review: from in vitro to ex vivo studies: an overview of alternative methods for the study of medical biofilms. BIOFOULING 2020; 36:1129-1148. [PMID: 33349038 DOI: 10.1080/08927014.2020.1859499] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 11/23/2020] [Accepted: 11/29/2020] [Indexed: 06/12/2023]
Abstract
Microbial biofilms are a natural adaptation of microorganisms, typically composed of multiple microbial species, exhibiting complex community organization and cooperation. Biofilm dynamics and their complex architecture are challenging for basic analyses, including the number of viable cells, biomass accumulation, biofilm morphology, among others. The methods used to study biofilms range from in vitro techniques to complex in vivo models. However, animal welfare has become a major concern, not only in society, but also in the academic and scientific field. Thus, the pursuit for alternatives to in vivo biofilm analyses presenting characteristics that mimic in vivo conditions has become essential. In this context, the present review proposes to provide an overview of strategies to study biofilms of medical interest, with emphasis on alternatives that approximate experimental conditions to host-associated environments, such as the use of medical devices as substrata for biofilm formation, microcosm and ex vivo models.
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Affiliation(s)
- Débora de Souza Collares Maia Castelo-Branco
- Department of Pathology and Legal Medicine, Postgraduate Program in Medical Microbiology, Group of Applied Medical Microbiology, Federal University of Ceará, Fortaleza, Brazil
- Department of Pathology and Legal Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Brazil
| | - Bruno Rocha Amando
- Department of Pathology and Legal Medicine, Postgraduate Program in Medical Microbiology, Group of Applied Medical Microbiology, Federal University of Ceará, Fortaleza, Brazil
| | - Crister José Ocadaque
- Department of Pathology and Legal Medicine, Postgraduate Program in Medical Microbiology, Group of Applied Medical Microbiology, Federal University of Ceará, Fortaleza, Brazil
| | - Lara de Aguiar
- Department of Pathology and Legal Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Brazil
- Postgraduate Program in Veterinary Sciences, College of Veterinary, State University of Ceará, Fortaleza, Brazil
| | - Débora Damásio de Queiroz Paiva
- Department of Pathology and Legal Medicine, Postgraduate Program in Medical Microbiology, Group of Applied Medical Microbiology, Federal University of Ceará, Fortaleza, Brazil
| | - Expedito Maia Diógenes
- Department of Pathology and Legal Medicine, Postgraduate Program in Medical Microbiology, Group of Applied Medical Microbiology, Federal University of Ceará, Fortaleza, Brazil
| | - Glaucia Morgana de Melo Guedes
- Department of Pathology and Legal Medicine, Postgraduate Program in Medical Microbiology, Group of Applied Medical Microbiology, Federal University of Ceará, Fortaleza, Brazil
- Department of Pathology and Legal Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Brazil
| | - Cecília Leite Costa
- Department of Pathology and Legal Medicine, Postgraduate Program in Medical Microbiology, Group of Applied Medical Microbiology, Federal University of Ceará, Fortaleza, Brazil
| | - Anísio Silvestre Pinheiro Santos-Filho
- Department of Pathology and Legal Medicine, Postgraduate Program in Medical Microbiology, Group of Applied Medical Microbiology, Federal University of Ceará, Fortaleza, Brazil
| | - Ana Raquel Colares de Andrade
- Department of Pathology and Legal Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Brazil
| | - Rossana de Aguiar Cordeiro
- Department of Pathology and Legal Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Brazil
| | - Marcos Fábio Gadelha Rocha
- Department of Pathology and Legal Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Brazil
- Postgraduate Program in Veterinary Sciences, College of Veterinary, State University of Ceará, Fortaleza, Brazil
| | - José Júlio Costa Sidrim
- Department of Pathology and Legal Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Brazil
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Farias ALD, Carvalho LPFD, Méndez DAC, Cruvinel T, Brighenti FL. Characterization of polymicrobial biofilms obtained from saliva or carious lesions in dentin. BIOFOULING 2020; 36:877-887. [PMID: 33003966 DOI: 10.1080/08927014.2020.1826454] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 08/25/2020] [Accepted: 09/14/2020] [Indexed: 06/11/2023]
Abstract
This study aimed to compare the formation of polymicrobial biofilms using carious dentin or saliva as inoculum for application in in vitro microbiological studies on caries research. For biofilm growth, combined samples of infected dentin or saliva from three donors were used. The biofilms were grown on glass coverslips, under a regimen of intermittent exposure (6 h day-1) to 1% sucrose for 4 days. Total bacterial loads, as well as specific aciduric bacteria and mutans streptococci loads were quantified and correlated with biofilm acidogenicity and susceptibility to chlorhexidine. The data were evaluated using the Student's-t, Mann Whitney and Kruskal-Wallis tests. The two biofilms showed similar microbial loads (total bacteria, aciduric bacteria and mutans streptococci) on day 4, and high acidogenicity after 48 h and were susceptible to chlorhexidine at different time intervals. In conclusion, both dentin and saliva can be used as an inoculum in in vitro studies of processes related to biofilm formation.
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Affiliation(s)
- Aline Leite de Farias
- Pediatric Dentistry and Orthodontics Department, São Paulo State University (Unesp), School of Dentistry, Araraquara, Brazil
| | | | | | - Thiago Cruvinel
- Department of Pediatric Dentistry, Orthodontics and Public Health, University of São Paulo (USP), Bauru School of Dentistry, Bauru, Brazil
| | - Fernanda Lourenção Brighenti
- Pediatric Dentistry and Orthodontics Department, São Paulo State University (Unesp), School of Dentistry, Araraquara, Brazil
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Miranda ML, Silva BNS, Salomão KB, de Oliveira AB, Gabbai-Armelin PR, Brighenti FL. Effect of arginine on microorganisms involved in dental caries: a systematic literature review of in vitro studies. BIOFOULING 2020; 36:696-709. [PMID: 32752889 DOI: 10.1080/08927014.2020.1802587] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 07/24/2020] [Accepted: 07/25/2020] [Indexed: 06/11/2023]
Abstract
This systematic review aimed to discuss the effects of arginine on caries-related microorganisms in different in vitro biofilm models. The eligibility criteria were in vitro studies that evaluated the effect of arginine at different concentrations on caries-related microorganisms using biofilm models. Eighteen studies published between 2012 and 2019 were included. Different bacterial species were studied. Seventeen studies (94.4%) achieved a low risk of bias and only one showed a medium risk of bias. The studies showed that arginine is a promising approach for the ecological management of dental caries. The focus of this review was to evaluate the effects of arginine on microorganisms involved in the mechanism of dental caries.
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Affiliation(s)
- Marina Lins Miranda
- Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, Araraquara Dental School, São Paulo State University (UNESP), Araraquara, Brazil
| | - Bianca Núbia Souza Silva
- Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, Araraquara Dental School, São Paulo State University (UNESP), Araraquara, Brazil
| | - Karina Borges Salomão
- Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, Araraquara Dental School, São Paulo State University (UNESP), Araraquara, Brazil
| | - Analú Barros de Oliveira
- Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, Araraquara Dental School, São Paulo State University (UNESP), Araraquara, Brazil
| | - Paulo Roberto Gabbai-Armelin
- Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, Araraquara Dental School, São Paulo State University (UNESP), Araraquara, Brazil
| | - Fernanda Lourenção Brighenti
- Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, Araraquara Dental School, São Paulo State University (UNESP), Araraquara, Brazil
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Ayoub HM, Gregory RL, Tang Q, Lippert F. Influence of salivary conditioning and sucrose concentration on biofilm-mediated enamel demineralization. J Appl Oral Sci 2020; 28:e20190501. [PMID: 32236356 PMCID: PMC7105287 DOI: 10.1590/1678-7757-2019-0501] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 12/06/2019] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION The acquired pellicle formation is the first step in dental biofilm formation. It distinguishes dental biofilms from other biofilm types. OBJECTIVE To explore the influence of salivary pellicle formation before biofilm formation on enamel demineralization. METHODOLOGY Saliva collection was approved by Indiana University IRB. Three donors provided wax-stimulated saliva as the microcosm bacterial inoculum source. Acquired pellicle was formed on bovine enamel samples. Two groups (0.5% and 1% sucrose-supplemented growth media) with three subgroups (surface conditioning using filtered/pasteurized saliva; filtered saliva; and deionized water (DIW)) were included (n=9/subgroup). Biofilm was then allowed to grow for 48 h using Brain Heart Infusion media supplemented with 5 g/l yeast extract, 1 mM CaCl2.2H2O, 5% vitamin K and hemin (v/v), and sucrose. Enamel samples were analyzed for Vickers surface microhardness change (VHNchange), and transverse microradiography measuring lesion depth (L) and mineral loss (∆Z). Data were analyzed using two-way ANOVA. RESULTS The two-way interaction of sucrose concentration × surface conditioning was not significant for VHNchange (p=0.872), ∆Z (p=0.662) or L (p=0.436). Surface conditioning affected VHNchange (p=0.0079), while sucrose concentration impacted ∆Z (p<0.0001) and L (p<0.0001). Surface conditioning with filtered/pasteurized saliva resulted in the lowest VHNchange values for both sucrose concentrations. The differences between filtered/pasteurized subgroups and the two other surface conditionings were significant (filtered saliva p=0.006; DIW p=0.0075). Growing the biofilm in 1% sucrose resulted in lesions with higher ∆Z and L values when compared with 0.5% sucrose. The differences in ∆Z and L between sucrose concentration subgroups was significant, regardless of surface conditioning (both p<0.0001). CONCLUSION Within the study limitations, surface conditioning using human saliva does not influence biofilm-mediated enamel caries lesion formation as measured by transverse microradiography, while differences were observed using surface microhardness, indicating a complex interaction between pellicle proteins and biofilm-mediated demineralization of the enamel surface.
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Affiliation(s)
- Hadeel M Ayoub
- King Saud University, Dental Health Department, College of Applied Medical Sciences, Riyadh, Saudi Arabia.,Indiana University, School of Dentistry, Department of Biomedical Sciences and Comprehensive Care, Indianapolis, Indiana, USA
| | - Richard L Gregory
- Indiana University, School of Dentistry, Department of Biomedical Sciences and Comprehensive Care, Indianapolis, Indiana, USA
| | - Qing Tang
- Indiana University, School of Medicine, Department of Biostatistics, Indianapolis, Indiana, USA
| | - Frank Lippert
- Indiana University, School of Dentistry, Department of Cariology, Operative Dentistry and Dental Public Health, Indianapolis, Indiana, USA
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Ibrahim MS, Garcia IM, Vila T, Balhaddad AA, Collares FM, Weir MD, Xu HHK, Melo MAS. Multifunctional antibacterial dental sealants suppress biofilms derived from children at high risk of caries. Biomater Sci 2020; 8:3472-3484. [DOI: 10.1039/d0bm00370k] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Dental sealant containing antibacterial and bioactive agents decreased biofilm formation due to the saliva of children at low and high risk of caries.
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Affiliation(s)
- Maria Salem Ibrahim
- Ph.D. Program in Biomedical Sciences
- Biomaterials and Tissue Engineering Division
- University of Maryland School of Dentistry
- Baltimore
- USA
| | - Isadora Martini Garcia
- Ph.D. Program in Biomedical Sciences
- Biomaterials and Tissue Engineering Division
- University of Maryland School of Dentistry
- Baltimore
- USA
| | - Taissa Vila
- Ph.D. Program in Biomedical Sciences
- Biomaterials and Tissue Engineering Division
- University of Maryland School of Dentistry
- Baltimore
- USA
| | - Abdulrahman A. Balhaddad
- Ph.D. Program in Biomedical Sciences
- Biomaterials and Tissue Engineering Division
- University of Maryland School of Dentistry
- Baltimore
- USA
| | - Fabrício Mezzomo Collares
- Dental Materials Laboratory
- School of Dentistry
- Federal University of Rio Grande do Sul
- Porto Alegre
- Brazil
| | - Michael D. Weir
- Ph.D. Program in Biomedical Sciences
- Biomaterials and Tissue Engineering Division
- University of Maryland School of Dentistry
- Baltimore
- USA
| | - Hockin H. K. Xu
- Ph.D. Program in Biomedical Sciences
- Biomaterials and Tissue Engineering Division
- University of Maryland School of Dentistry
- Baltimore
- USA
| | - Mary Anne S. Melo
- Ph.D. Program in Biomedical Sciences
- Biomaterials and Tissue Engineering Division
- University of Maryland School of Dentistry
- Baltimore
- USA
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13
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Could a chelant improve the effect of curcumin-mediated photodynamic antimicrobial chemotherapy against dental intact biofilms? Lasers Med Sci 2019; 34:1185-1192. [DOI: 10.1007/s10103-018-02708-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Accepted: 12/14/2018] [Indexed: 12/20/2022]
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14
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Signori C, Hartwig AD, Silva-Júnior IFD, Correa MB, Azevedo MS, Cenci MS. The role of human milk and sucrose on cariogenicity of microcosm biofilms. Braz Oral Res 2018; 32:e109. [PMID: 30328901 DOI: 10.1590/1807-3107bor-2018.vol32.0109] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 08/03/2018] [Indexed: 11/22/2022] Open
Abstract
This study investigated the effect of human milk, alone and associated with sucrose, in the cariogenicity of biofilms in a microcosm biofilm model and compared with the cariogenicity of sucrose and bovine milk. Microcosm biofilms were grown in enamel discs in 24-well plates. Six growth conditions were studied: DMM (chemically defined artificial saliva - negative control), DMM with 1% of sucrose (DMM+s) (positive control), human milk with DMM, human milk with DMM+s, bovine milk with DMM, and bovine milk with DMM+s. After 5 days, the outcome variables surface hardness change (%SHC), microbiological composition of biofilms, and pH of supernatant were analyzed. All groups had significantly lower hardness loss compared to the DMM group with 1% of sucrose. Human and bovine milk associated with sucrose showed higher hardness loss. The supernatant pH values after 6 hours of different treatments were similar for the groups sucrose and human milk associated with sucrose (p>0.05). After 18 hours at rest in pure DMM, an increase in the pH of the supernatant was observed. Higher values of total microorganisms count were found for sucrose and bovine milk groups compared to the group supplemented only by DMM. Bovine milk group showed greater amount of total aciduric microorganisms in comparison to human milk group. Within the limits of this study, it can be infered that both human and cow milks have some cariogenic potential, although differing from sucrose in terms of mineral loss.
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Affiliation(s)
- Cácia Signori
- Universidade Federal de Pelotas - UFPel, School of Dentistry, Graduate Program in Dentistry, Pelotas, RS, Brazil
| | - Andréia Drawanz Hartwig
- Universidade Federal de Pelotas - UFPel, School of Dentistry, Graduate Program in Dentistry, Pelotas, RS, Brazil
| | - Ivam Freire da Silva-Júnior
- Universidade Federal de Pelotas - UFPel, School of Dentistry, Graduate Program in Dentistry, Pelotas, RS, Brazil
| | - Marcos Britto Correa
- Universidade Federal de Pelotas - UFPel, School of Dentistry, Graduate Program in Dentistry, Pelotas, RS, Brazil
| | - Marina Sousa Azevedo
- Universidade Federal de Pelotas - UFPel, School of Dentistry, Graduate Program in Dentistry, Pelotas, RS, Brazil
| | - Maximiliano Sérgio Cenci
- Universidade Federal de Pelotas - UFPel, School of Dentistry, Graduate Program in Dentistry, Pelotas, RS, Brazil
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15
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Cusicanqui Méndez DA, Gutierres E, José Dionisio E, Afonso Rabelo Buzalaf M, Cardoso Oliveira R, Andrade Moreira Machado MA, Cruvinel T. Curcumin-mediated antimicrobial photodynamic therapy reduces the viability and vitality of infected dentin caries microcosms. Photodiagnosis Photodyn Ther 2018; 24:102-108. [PMID: 30240927 DOI: 10.1016/j.pdpdt.2018.09.007] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 08/26/2018] [Accepted: 09/17/2018] [Indexed: 12/17/2022]
Abstract
BACKGROUND To our knowledge, there is a lack of evidence on the effect of Antimicrobial Photodynamic Therapy (aPDT) by the application of curcumin against complex biofilms of dental caries lesions. This study aimed to evaluate the viability, vitality, and acid metabolism of infected dentin caries microcosms treated with curcumin-mediated aPDT. METHODS After microcosm biofilms growing anaerobically on bovine dentin disks immersed in McBain medium with 1% sucrose at 37 °C for 5 days, the biofilms were treated by the association of DMSO water solution or 600 μmol L-1 curcumin with 0, 37.5 or 75 J cm-2 blue LED (455 nm). Then, the colony-forming units (CFU) counts of total microorganisms, total streptococci, mutans streptococci, and total lactobacilli were determined by plating. The lactic acid concentration was analyzed by enzymatic spectrophotometry method, while the vitality of intact biofilms was evaluated by confocal laser scanning microscope (CLSM). Statistical analysis was performed by Kruskal Wallis and post-hoc Dunn's tests (P < 0.05). RESULTS Curcumin alone did not affect the viability of microorganisms and the vitality of intact biofilms. However, 75 J cm-2 LED alone decreased the total microorganisms and total lactobacilli counts. The combination of curcumin and LED reduced significantly the counts of all microorganism groups and the vitality of intact biofilms. Differences were not observed between the lactic acid concentrations of distinct groups. CONCLUSIONS Therefore, curcumin-mediated aPDT was effective in reducing the viability and the vitality of infected dentin caries microcosms, without interfering in their acidogenicity.
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Affiliation(s)
| | - Eliézer Gutierres
- Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru School of Dentistry, University of São Paulo, Brazil
| | - Evandro José Dionisio
- Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru School of Dentistry, University of São Paulo, Brazil
| | | | | | | | - Thiago Cruvinel
- Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru School of Dentistry, University of São Paulo, Brazil.
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16
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Pires PM, Santos TP, Fonseca-Gonçalves A, Pithon MM, Lopes RT, Neves AA. Mineral density in carious dentine after treatment with calcium silicates and polyacrylic acid-based cements. Int Endod J 2018; 51:1292-1300. [DOI: 10.1111/iej.12941] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 04/13/2018] [Indexed: 12/01/2022]
Affiliation(s)
- P. M. Pires
- Department of Pediatric Dentistry and Orthodontics; Federal University of Rio de Janeiro; Rio de Janeiro Brazil
| | - T. P. Santos
- Laboratory for Nuclear Instrumentation; Federal University of Rio de Janeiro; Rio de Janeiro Brazil
| | - A. Fonseca-Gonçalves
- Department of Pediatric Dentistry and Orthodontics; Federal University of Rio de Janeiro; Rio de Janeiro Brazil
| | - M. M. Pithon
- State University of Southwestern Bahia; Jequié BA Brazil
| | - R. T. Lopes
- Laboratory for Nuclear Instrumentation; Federal University of Rio de Janeiro; Rio de Janeiro Brazil
| | - A. A. Neves
- Department of Pediatric Dentistry and Orthodontics; Federal University of Rio de Janeiro; Rio de Janeiro Brazil
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17
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Research on oral microbiota of monozygotic twins with discordant caries experience - in vitro and in vivo study. Sci Rep 2018; 8:7267. [PMID: 29740156 PMCID: PMC5940813 DOI: 10.1038/s41598-018-25636-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Accepted: 04/18/2018] [Indexed: 02/05/2023] Open
Abstract
Oral microbiome is potentially correlated with many diseases, such as dental caries, periodontitis, oral cancer and some systemic diseases. Twin model, as an effective method for studying human microbiota, is widely used in research of relationship between oral microbiota and dental caries. However, there were few researches focusing on caries discordant twins. In this study, in vitro assays were conducted combined with 16S rRNA sequencing analysis on oral microbiota sampled from twins who presented discordant caries experience and mice model was developed as well. Results showed that oral microbiota from caries-active twin possessed higher metabolic activity and produced more lactic production. 16S rRNA sequencing analysis showed that more than 80% of family taxa could be transferred into gnotobiotic-mice. Key caries-associated genera were significantly different between twins and the same difference in genus level could be found in mice as well (p < 0.05). This study suggested that oral microbiota of twins could be distinguished from each other despite the similarities in genetic make-up, living environment, and lifestyle. The difference in microbiota was applied to develop a mice model which may facilitate the investigation of core microbiota of dental caries.
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18
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Hetrodt F, Lausch J, Meyer-Lueckel H, Apel C, Conrads G. Natural saliva as an adjuvant in a secondary caries model based on Streptococcus mutans. Arch Oral Biol 2018; 90:138-143. [PMID: 29614462 DOI: 10.1016/j.archoralbio.2018.03.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 03/21/2018] [Accepted: 03/23/2018] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Two factors for secondary caries formation were evaluated using an artificial biofilm model, saliva as additive in culture medium and bonding procedures of composite materials for artificial gap creation. DESIGN Standardized cavities were prepared in bovine tooth samples (n = 44), treated with two different bonding pretreatments, restored and after artificial ageing incubated with Streptococcus mutans in a Mueller-Hinton-Broth-Sugar medium with or without human saliva for seven days. Secondary caries formation was analyzed using confocal laser scanning microscopy and transversal microradiography. RESULTS Lesions were significantly pronounced in groups using saliva, but were not influenced by the bonding pretreatments. CONCLUSIONS The results indicate that the addition of saliva, but not the type of bonding procedure influences the outcome in the present biofilm-based secondary caries model.
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Affiliation(s)
- Franziska Hetrodt
- Department of Operative Dentistry, Periodontology and Preventive Dentistry, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany.
| | - Julian Lausch
- Department of Operative Dentistry, Periodontology and Preventive Dentistry, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany.
| | - Hendrik Meyer-Lueckel
- Department of Preventive, Restorative and Pediatric Dentistry, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland.
| | - Christian Apel
- Department of Biohybrid & Medical Textiles, Institute of Applied Medical Engineering, Helmholtz Institute of RWTH Aachen University & Hospital, Pauwelsstraße 20, 52074, Aachen, Germany.
| | - Georg Conrads
- Division of Oral Microbiology and Immunology, Department of Operative Dentistry, Periodontology and Preventive Dentistry, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany.
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19
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Souza BMD, Fernandes Neto C, Salomão PMA, Vasconcelos LRSMD, Andrade FBD, Magalhães AC. Analysis of the antimicrobial and anti-caries effects of TiF4 varnish under microcosm biofilm formed on enamel. J Appl Oral Sci 2018; 26:e20170304. [PMID: 29489933 PMCID: PMC5829548 DOI: 10.1590/1678-7757-2017-0304] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 09/25/2017] [Indexed: 11/22/2022] Open
Abstract
Titanium tetrafluoride (TiF4) is known for interacting with enamel reducing demineralization. However, no information is available about its potential antimicrobial effect. OBJECTIVES This study evaluated the antimicrobial and anti-caries potential of TiF4 varnish compared to NaF varnish, chlorhexidine gel (positive control), placebo varnish and untreated (negative controls) using a dental microcosm biofilm model. MATERIAL AND METHODS A microcosm biofilm was produced on bovine enamel previously treated with the varnishes, using inoculum from human saliva mixed with McBain saliva, under 0.2% sucrose exposure, for 14 days. All experiments were performed in biological triplicate (n=4/group in each experiment). Factors evaluated were: bacterial viability (% dead and live bacteria); CFU counting (log10 CFU/mL); and enamel demineralization (transverse microradiography - TMR). Data were analysed using ANOVA/Tukey's test or Kruskal-Wallis/Dunn's test (p<0.05). RESULTS Only chlorhexidine significantly increased the number of dead bacteria (68.8±13.1% dead bacteria) compared to untreated control (48.9±16.1% dead bacteria). No treatment reduced the CFU counting (total microorganism and total streptococci) compared to the negative controls. Only TiF4 was able to reduce enamel demineralization (ΔZ 1110.7±803.2 vol% μm) compared to both negative controls (untreated: ΔZ 4455.3±1176.4 vol% μm). CONCLUSIONS TiF4 varnish has no relevant antimicrobial effect. Nevertheless, TiF4 varnish was effective in reducing enamel demineralization under this model.
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Affiliation(s)
- Beatriz Martines de Souza
- Departamento de Ciências Biológicas, Faculdade de Odontologia de Bauru, Universidade de São Paulo, Bauru, São Paulo, Brasil
| | - Constantino Fernandes Neto
- Departamento de Ciências Biológicas, Faculdade de Odontologia de Bauru, Universidade de São Paulo, Bauru, São Paulo, Brasil
| | - Priscila Maria Aranda Salomão
- Departamento de Ciências Biológicas, Faculdade de Odontologia de Bauru, Universidade de São Paulo, Bauru, São Paulo, Brasil
| | | | - Flaviana Bombarda de Andrade
- Departamento de Dentística, Endodontia e Materiais Odontológicos, Faculdade de Odontologia de Bauru, Universidade de São Paulo, Bauru, São Paulo, Brasil
| | - Ana Carolina Magalhães
- Departamento de Ciências Biológicas, Faculdade de Odontologia de Bauru, Universidade de São Paulo, Bauru, São Paulo, Brasil
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20
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Effect of methylene blue-mediated antimicrobial photodynamic therapy on dentin caries microcosms. Lasers Med Sci 2017; 33:479-487. [DOI: 10.1007/s10103-017-2379-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 10/26/2017] [Indexed: 01/10/2023]
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21
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Maske TT, van de Sande FH, Arthur RA, Huysmans MCDNJM, Cenci MS. In vitro biofilm models to study dental caries: a systematic review. BIOFOULING 2017; 33:661-675. [PMID: 28792234 DOI: 10.1080/08927014.2017.1354248] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 07/06/2017] [Indexed: 06/07/2023]
Abstract
The aim of this systematic review is to characterize and discuss key methodological aspects of in vitro biofilm models for caries-related research and to verify the reproducibility and dose-response of models considering the response to anti-caries and/or antimicrobial substances. Inclusion criteria were divided into Part I (PI): an in vitro biofilm model that produces a cariogenic biofilm and/or caries-like lesions and allows pH fluctuations; and Part II (PII): models showing an effect of anti-caries and/or antimicrobial substances. Within PI, 72.9% consisted of dynamic biofilm models, while 27.1% consisted of batch models. Within PII, 75.5% corresponded to dynamic models, whereas 24.5% corresponded to batch models. Respectively, 20.4 and 14.3% of the studies reported dose-response validations and reproducibility, and 32.7% were classified as having a high risk of bias. Several in vitro biofilm models are available for caries-related research; however, most models lack validation by dose-response and reproducibility experiments for each proposed protocol.
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Affiliation(s)
- T T Maske
- a Graduate Program in Dentistry , Federal University of Pelotas , Pelotas-RS , Brazil
- b Department of Dentistry , Radboud University Medical Center , Nijmegen , the Netherlands
| | - F H van de Sande
- c School of Dentistry , IMED Faculdade Meridional , Passo Fundo-RS , Brazil
| | - R A Arthur
- d Department of Preventive and Community Dentistry , Federal University of Rio Grande do Sul , Porto Alegre-RS , Brazil
| | - M C D N J M Huysmans
- b Department of Dentistry , Radboud University Medical Center , Nijmegen , the Netherlands
| | - M S Cenci
- a Graduate Program in Dentistry , Federal University of Pelotas , Pelotas-RS , Brazil
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22
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Maske TT, Kuper NK, Cenci MS, Huysmans MCD. Minimal Gap Size and Dentin Wall Lesion Development Next to Resin Composite in a Microcosm Biofilm Model. Caries Res 2017; 51:475-481. [DOI: 10.1159/000478536] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Accepted: 06/09/2017] [Indexed: 11/19/2022] Open
Abstract
This in vitro study investigated the development of dentin wall lesions next to resin composite containing very small gap sizes using an in vitro biofilm model, and evaluated whether a relevant threshold for the gap size could be established. Microcosm biofilms were grown for 14 days within small interfacial gaps between dentin-resin composite discs under intermittent cariogenic challenge. The factor under study was gap size: samples were either restored with composite resin without adhesive procedure (no intentional gap; no bonding [NB] group) or with intentional gaps of 30, 60, or 90 µm, or with complete adhesive procedure (no gap; bonding [B] group). Secondary caries wall lesion progression was measured in lesion depth (LD) and mineral loss (ML) using transversal wavelength independent microradiography at 3 locations: outer surface lesion and wall lesions at 200 and 500 µm distance from gap entrance. Results from linear regression analysis showed that the presence of an intentional gap (30, 60, and 90 µm) affected the secondary caries progression at 200 µm from the gap entrance (p ≤ 0.013). The NB group did not show significant wall lesion development (ML and LD, p ≥ 0.529). At 500 µm distance almost no wall caries development was observed. In conclusion, dentin wall lesions developed in minimal gap sizes, and the threshold for secondary wall lesion development was a gap of around 30 µm in this microcosm biofilm model.
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23
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Fernández C, Aspiras M, Dodds M, González-Cabezas C, Rickard A. The effect of inoculum source and fluid shear force on the development ofin vitrooral multispecies biofilms. J Appl Microbiol 2017; 122:796-808. [DOI: 10.1111/jam.13376] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 11/29/2016] [Accepted: 11/29/2016] [Indexed: 12/23/2022]
Affiliation(s)
- C.E. Fernández
- Department of Epidemiology; School of Public Health; University of Michigan; Ann Arbor MI USA
- Department of Cariology; Restorative Sciences and Endodontics; School of Dentistry; University of Michigan; Ann Arbor MI USA
| | - M.B. Aspiras
- Scientific Discovery; Global Innovation Center (GIC); Wrigley; Chicago IL USA
| | - M.W. Dodds
- Scientific Discovery; Global Innovation Center (GIC); Wrigley; Chicago IL USA
| | - C. González-Cabezas
- Department of Cariology; Restorative Sciences and Endodontics; School of Dentistry; University of Michigan; Ann Arbor MI USA
| | - A.H. Rickard
- Department of Epidemiology; School of Public Health; University of Michigan; Ann Arbor MI USA
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