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Ladeira LLC, Nascimento GG, Leite FRM, Alves-Costa S, Thomaz EBAF, Alves CMC, Cury JA, Ribeiro CCC. Sugar intake above international recommendations and oral disease burden: A population-based study. Oral Dis 2024; 30:615-623. [PMID: 36504466 DOI: 10.1111/odi.14464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 10/19/2022] [Accepted: 11/23/2022] [Indexed: 12/14/2022]
Abstract
OBJECTIVE To evaluate the association between added sugar intake above the daily limit for the risk of noncommunicable diseases (NCDs) and the Chronic Oral Disease Burden in adolescents. METHODS This was a population-based study using cross-sectional data nested to RPS Cohorts Consortium, São Luís, Brazil, from the 18-19-year-old follow-up (n = 2515). High consumption of added sugars was estimated according to the limits of the World Health Organization guidelines (WHO) (≥5% of total energy/day) and the American Heart Association statement (AHA) (≥25 g/day). The Chronic Oral Disease Burden was a latent variable (number of decayed teeth, periodontal probing depth ≥4 mm, clinical attachment level ≥3 mm, and bleeding on probing). Models were adjusted for Socioeconomic Status, sex, obesity, and plaque index and analyzed through structural equation modeling. RESULTS Adolescents had high sugar consumption according to the WHO (78.6%) and AHA (81.4%) recommendations. High sugar intake, according to WHO (SC = 0.096; p = 0.007) and AHA (SC = 0.056; p = 0.027), was associated with a heavier Chronic Oral Disease Burden. Even half of the recommended dose was sufficient to affect some oral disease indicators. CONCLUSION Sugar intake over international statements to prevent NCDs is associated with higher Chronic Oral Disease Burden among adolescents.
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Affiliation(s)
| | - Gustavo G Nascimento
- Section for Periodontology, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
- National Dental Centre Singapore, National Dental Research Institute Singapore, Singapore, Singapore
- Oral Health ACP, Health Services and Systems Research Programme Duke-NUS Medical School, Singapore, Singapore
| | - Fabio Renato Manzolli Leite
- Section for Periodontology, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
- National Dental Centre Singapore, National Dental Research Institute Singapore, Singapore, Singapore
- Oral Health ACP, Health Services and Systems Research Programme Duke-NUS Medical School, Singapore, Singapore
| | - Silas Alves-Costa
- Postgraduate Program of Dentistry, Federal University of Maranhão, São Luís, Brazil
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Li S, Liu P, Nascimento GG, Wang X, Leite FRM, Chakraborty B, Hong C, Ning Y, Xie F, Teo ZL, Ting DSW, Haddadi H, Ong MEH, Peres MA, Liu N. Federated and distributed learning applications for electronic health records and structured medical data: a scoping review. J Am Med Inform Assoc 2023; 30:2041-2049. [PMID: 37639629 PMCID: PMC10654866 DOI: 10.1093/jamia/ocad170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 07/19/2023] [Indexed: 08/31/2023] Open
Abstract
OBJECTIVES Federated learning (FL) has gained popularity in clinical research in recent years to facilitate privacy-preserving collaboration. Structured data, one of the most prevalent forms of clinical data, has experienced significant growth in volume concurrently, notably with the widespread adoption of electronic health records in clinical practice. This review examines FL applications on structured medical data, identifies contemporary limitations, and discusses potential innovations. MATERIALS AND METHODS We searched 5 databases, SCOPUS, MEDLINE, Web of Science, Embase, and CINAHL, to identify articles that applied FL to structured medical data and reported results following the PRISMA guidelines. Each selected publication was evaluated from 3 primary perspectives, including data quality, modeling strategies, and FL frameworks. RESULTS Out of the 1193 papers screened, 34 met the inclusion criteria, with each article consisting of one or more studies that used FL to handle structured clinical/medical data. Of these, 24 utilized data acquired from electronic health records, with clinical predictions and association studies being the most common clinical research tasks that FL was applied to. Only one article exclusively explored the vertical FL setting, while the remaining 33 explored the horizontal FL setting, with only 14 discussing comparisons between single-site (local) and FL (global) analysis. CONCLUSIONS The existing FL applications on structured medical data lack sufficient evaluations of clinically meaningful benefits, particularly when compared to single-site analyses. Therefore, it is crucial for future FL applications to prioritize clinical motivations and develop designs and methodologies that can effectively support and aid clinical practice and research.
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Affiliation(s)
- Siqi Li
- Centre for Quantitative Medicine, Duke-NUS Medical School, Singapore 169857, Singapore
| | - Pinyan Liu
- Centre for Quantitative Medicine, Duke-NUS Medical School, Singapore 169857, Singapore
| | - Gustavo G Nascimento
- National Dental Research Institute Singapore, National Dental Centre Singapore, Singapore 168938, Singapore
- Oral Health Academic Clinical Programme, Duke-NUS Medical School, Singapore 169857, Singapore
| | - Xinru Wang
- Centre for Quantitative Medicine, Duke-NUS Medical School, Singapore 169857, Singapore
| | - Fabio Renato Manzolli Leite
- National Dental Research Institute Singapore, National Dental Centre Singapore, Singapore 168938, Singapore
- Oral Health Academic Clinical Programme, Duke-NUS Medical School, Singapore 169857, Singapore
| | - Bibhas Chakraborty
- Centre for Quantitative Medicine, Duke-NUS Medical School, Singapore 169857, Singapore
- Programme in Health Services and Systems Research, Duke-NUS Medical School, Singapore 169857, Singapore
- Department of Statistics and Data Science, National University of Singapore, Singapore 117546, Singapore
- Department of Biostatistics and Bioinformatics, Duke University, Durham, NC 27708, United States
| | - Chuan Hong
- Department of Biostatistics and Bioinformatics, Duke University, Durham, NC 27708, United States
| | - Yilin Ning
- Centre for Quantitative Medicine, Duke-NUS Medical School, Singapore 169857, Singapore
| | - Feng Xie
- Centre for Quantitative Medicine, Duke-NUS Medical School, Singapore 169857, Singapore
- Programme in Health Services and Systems Research, Duke-NUS Medical School, Singapore 169857, Singapore
| | - Zhen Ling Teo
- Singapore National Eye Centre, Singapore, Singapore Eye Research Institute, Singapore 168751, Singapore
| | - Daniel Shu Wei Ting
- Centre for Quantitative Medicine, Duke-NUS Medical School, Singapore 169857, Singapore
- Singapore National Eye Centre, Singapore, Singapore Eye Research Institute, Singapore 168751, Singapore
| | - Hamed Haddadi
- Department of Computing, Imperial College London, London SW7 2AZ, England, United Kingdom
| | - Marcus Eng Hock Ong
- Programme in Health Services and Systems Research, Duke-NUS Medical School, Singapore 169857, Singapore
- Department of Emergency Medicine, Singapore General Hospital, Singapore 169608, Singapore
| | - Marco Aurélio Peres
- National Dental Research Institute Singapore, National Dental Centre Singapore, Singapore 168938, Singapore
- Oral Health Academic Clinical Programme, Duke-NUS Medical School, Singapore 169857, Singapore
- Programme in Health Services and Systems Research, Duke-NUS Medical School, Singapore 169857, Singapore
| | - Nan Liu
- Centre for Quantitative Medicine, Duke-NUS Medical School, Singapore 169857, Singapore
- Programme in Health Services and Systems Research, Duke-NUS Medical School, Singapore 169857, Singapore
- Institute of Data Science, National University of Singapore, Singapore 117602, Singapore
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Bitencourt FV, Nascimento GG, Costa SA, Andersen A, Sandbæk A, Leite FRM. Co-occurrence of Periodontitis and Diabetes-Related Complications. J Dent Res 2023; 102:1088-1097. [PMID: 37448314 DOI: 10.1177/00220345231179897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/15/2023] Open
Abstract
Periodontitis is a common finding among people with diabetes mellitus (DM) and has been cited as a DM complication. Whether and how periodontitis relates to other diabetes-related complications has yet to be explored. This study aims to examine the clustering of periodontitis with other diabetes-related complications and explore pathways linking diabetes-related complications with common risk factors. Using data from participants with DM across 3 cycles of the National Health and Nutrition Examination Survey (NHANES) (n = 2,429), we modeled direct and indirect pathways from risk factors to diabetes-related complications, a latent construct comprising periodontitis, cardiovascular diseases, proteinuria, and hypertension. Covariates included age, sex, socioeconomic status (SES), smoking, physical activity, healthy diet, alcohol consumption, hemoglobin A1c (HbA1c), dyslipidemia, and body mass index (BMI). Sensitivity analyses were performed considering participants with overweight/obesity and restricting the sample to individuals without DM. Periodontitis clustered with other diabetes complications, forming a latent construct dubbed diabetes-related complications. In NHANES III, higher HbA1c levels and BMI, older age, healthy diet, and regular physical activity were directly associated with the latent variable diabetes-related complications. In addition, a healthy diet and BMI had a total effect on diabetes-related complications. Although sex, smoking, dyslipidemia, and SES demonstrated no direct effect on diabetes-related complications in NHANES III, a direct effect was observed using NHANES 2011-2014 cycles. Sensitivity analysis considering participants with overweight/obesity and without DM showed consistent results. Periodontal tissue breakdown seems to co-occur with multiple diabetes-related complications and may therefore serve as a valuable screening tool for other well-known diabetes-related complications.
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Affiliation(s)
- F V Bitencourt
- Department of Dentistry and Oral Health, Section for Periodontology, Aarhus University, Aarhus, Denmark
- Steno Diabetes Center Aarhus, Aarhus University Hospital, Aarhus, Denmark
| | - G G Nascimento
- National Dental Research Institute Singapore, National Dental Centre Singapore, Singapore
- Oral Health Academic Clinical Programme, Duke-NUS Medical School, Singapore
| | - S A Costa
- Graduate Dentistry Program, Federal University of Maranhão, São Luís, Maranhão, Brazil
| | - A Andersen
- Steno Diabetes Center Aarhus, Aarhus University Hospital, Aarhus, Denmark
| | - A Sandbæk
- Steno Diabetes Center Aarhus, Aarhus University Hospital, Aarhus, Denmark
- Department of Public Health, Aarhus University, Aarhus, Denmark
| | - F R M Leite
- National Dental Research Institute Singapore, National Dental Centre Singapore, Singapore
- Oral Health Academic Clinical Programme, Duke-NUS Medical School, Singapore
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Leite FRM, López R, Pajaniaye JB, Nascimento GG. Effect of Smoking Exposure on Nonsurgical Periodontal Therapy: 1-Year Follow-up. J Dent Res 2023; 102:280-286. [PMID: 36333874 DOI: 10.1177/00220345221135100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
This study investigated the influence of different levels of exposure to smoking on periodontal healing for 12 mo after nonsurgical periodontal therapy and supportive periodontal care every third month. Eighty smokers willing to quit smoking and with periodontitis were included. Participants were offered an individualized voluntary smoking cessation program. Data collection included questionnaires and a full-mouth periodontal examination. Group-based trajectory modeling was used to model smoking trajectories over the follow-up. The effect of smoking trajectory on periodontal parameters over time was estimated with mixed effects modeling. Three smoking patterns were identified: light smokers/quitters (n = 46), moderate smokers (n = 17), and heavy smokers (n = 17). For the periodontal data, the first factor, moderate periodontitis, included the number of sites with clinical attachment levels (CALs) of 4, 5, 6, and 7 mm; periodontal pocket depths (PPDs) of 4, 5, and 6 mm; and bleeding on probing. The second factor, severe periodontitis, consisted of the number of sites with a CAL ≥8 mm and PPD ≥7 mm. Heavy smokers commenced with a higher average CAL of 1.1 mm and 10 more sites with severe periodontitis than light smokers/quitters. While light smokers/quitters and moderate smokers obtained an average improvement of 0.6-mm PPD and 0.7-mm CAL, respectively, heavy smokers experienced 0.5-mm attachment loss. Heavy smokers had only a 50% reduction in the number of sites with moderate periodontitis when compared with light smokers/quitters and moderate smokers. While most participants benefited from nonsurgical periodontal therapy with results affected in a dose-response manner, the therapy had no effect on severe periodontitis among heavy smokers. Smoking cessation should be part of periodontal therapy; otherwise, limited benefits would be observed among heavy smokers, hindering the effect of treatment.
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Affiliation(s)
- F R M Leite
- Section for Periodontology, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
- National Dental Research Institute Singapore, National Dental Centre Singapore, Singapore
- ORH ACP, Duke-NUS Medical School, Singapore
| | - R López
- Section for Periodontology, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
| | - J B Pajaniaye
- Section for Periodontology, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
| | - G G Nascimento
- Section for Periodontology, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
- National Dental Research Institute Singapore, National Dental Centre Singapore, Singapore
- ORH ACP, Duke-NUS Medical School, Singapore
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Bitencourt FV, Olsson TO, Lamers JMDS, Leite FRM, Nascimento GG, Toassi RFC. Impact of public health and higher education policies on the profile of final-year Brazilian dental students: Challenges and future developments. Eur J Dent Educ 2022. [PMID: 35869678 DOI: 10.1111/eje.12840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 05/30/2022] [Accepted: 06/12/2022] [Indexed: 06/15/2023]
Abstract
INTRODUCTION Brazil has experienced transformations in higher education and health services, including launching more inclusive public policies focused on these two areas. OBJECTIVE To evaluate the profile of final-year dental students from a Brazilian public university from 2010 to 2019, accompanied by changes in public health and higher education policies. METHODS A prospective observacional study was carried out with final-year dental students. A self-applicable semi-structured questionnaire was applied. RESULT Six-hundred and seventy-seven students participated, of which 71.5% were women, 72.9% aged between 21 and 25 years, 96.2% single, and 96.4% were without children. Over ten years, it was possible to identify trends in the profile explained by implementing public policies toward more inclusive access to Brazilian higher education by socioeconomically disadvantaged individuals. Students who completed the course between 2018 and 2019 did not have the state capital city (the wealthiest area) as their origin city and had lower parental education and income levels than dental students graduating between 2010 and 2011. Moreover, working as a primary care dentist in the Brazilian National Health System was considered a professional possibility by 61.4% of the students, and has gained prominence significantly over time, ranging from 21.1% in 2010 to 72.9% in 2019 (p < .05). CONCLUSION Over the study period, concomitantly to advances in public health and higher education policies in Brazil, more diverse access to public dental education was observed, allowing students from low socioeconomic positions to take the education. Changes have also impacted the students' perspectives regarding the need for postgraduate training and a career in public health dentistry. However, these trends need to be consolidated, and public policies continued and strengthened.
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Affiliation(s)
| | - Thaís Ostroski Olsson
- Department of Preventive and Social Dentistry, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Juliana Maciel de Souza Lamers
- Pedagogue, Technician in Educational Affairs at the Faculty of Dentistry of the Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | | | | | - Ramona Fernanda Ceriotti Toassi
- Department of Preventive and Social Dentistry, School of Dentistry, Postgraduate Program in Teaching in Health Science, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
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ConceiÇÃo LD, Cuevas-SuÁrez CE, Piva E, Lund RG, Leite FRM. Biological and mechanical characterization of commercial and experimental periodontal surgical dressings. Braz Oral Res 2021; 35:e045. [PMID: 33681878 DOI: 10.1590/1807-3107bor-2021.vol35.0045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 10/28/2020] [Indexed: 11/22/2022] Open
Abstract
The objective of this study was to evaluate the biocompatibility and mechanical properties of two commercially available and one experimental periodontal dressing materials. The cytotoxicity of Periobond ® , Barricaid ® and one experimental periodontal dressing based on Exothane ® 8 monomer was tested on 3T3/NIH mouse fibroblast. Genotoxicity was assessed by micronuclei formation, and cell alterations were analyzed using light microscopy. Both biological assays were performed using the eluate obtained from specimens after 24, 72, or 168 hours of incubation. Mechanical characterization was assessed through the ultimate tensile strength and the water sorption and solubility tests. The significance level of α = 0.05 was used for all statistical analyses. All the materials promoted a cell viability lower than 60% in all evaluated times. In general, the cell viability was significantly reduced after 72 and 168h of specimens' incubation. Considering the factor material, there were not statistical differences in the cell viability (p = 0.156). The genotoxicity was not statistically significant among the groups in the different periods of time (p > 0.05). Differences in the ultimate tensile strength values were not statistically significant different among the groups (p = 0.125). Periobond ® showed the higher water sorption values (p < 0.001). Regarding solubility, there were no statistical differences between the groups (p = 0.098). All the periodontal dressing materials evaluated in this study exerted a cytotoxic effect against mouse fibroblasts, and their toxicity became more evident over time. Among the materials evaluated, the experimental light-cure type has shown overall similar properties to the commercial references.
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Affiliation(s)
- Luciana Domingues ConceiÇÃo
- Universidade Federal de Pelotas , Dental School , Department of Restorative Dentistry , Pelotas , RS , Brazil
| | - Carlos Enrique Cuevas-SuÁrez
- Autonomous University of Hidalgo State , Academic Area of Dentistry , Dental Materials Laboratory , San Agustín , Tlaxiaca , Mexico
| | - Evandro Piva
- Universidade Federal de Pelotas , Dental School , Department of Restorative Dentistry , Pelotas , RS , Brazil
| | - Rafael Guerra Lund
- Universidade Federal de Pelotas , Dental School , Department of Restorative Dentistry , Pelotas , RS , Brazil
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Leite FRM, Peres MA, Nascimento GG. Is the misinterpretation of association and causation a never‐ending story? Aust Dent J 2019; 64:201-202. [DOI: 10.1111/adj.12687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Indexed: 11/28/2022]
Affiliation(s)
- FRM Leite
- Section of Periodontology Department of Dentistry and Oral Health Aarhus University Aarhus Denmark
| | - MA Peres
- School of Dentistry and Oral Health Griffith University Gold Coast Queensland Australia
- Menzies Health Institute Queensland Griffith University Gold Coast Queensland Australia
| | - GG Nascimento
- Section of Periodontology Department of Dentistry and Oral Health Aarhus University Aarhus Denmark
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Nascimento GG, Leite FRM, Conceição DA, Ferrúa CP, Singh A, Demarco FF. Is there a relationship between obesity and tooth loss and edentulism? A systematic review and meta-analysis. Obes Rev 2016; 17:587-98. [PMID: 27125768 DOI: 10.1111/obr.12418] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 02/24/2016] [Accepted: 03/16/2016] [Indexed: 01/08/2023]
Abstract
This study conducted a systematic review to assess the bi-directional association between tooth loss/edentulism and obesity. Electronic searches were performed in four different databases. Observational studies that tested associations between tooth loss/edentulism and obesity as either exposures or outcomes were included. Additionally, meta-analyses, funnel plots and sensitivity analyses were conducted to synthesize the evidence. A total of 549 articles were identified in the electronic database search. Out of which, 16 studies were included within the meta-analyses: 75% considered tooth loss/edentulism as exposure and obesity as outcome, whereas 25% alternatively considered obesity as exposure and tooth loss/edentulism as outcome. Pooled estimates showed that obese individuals had 1.49 (95%CI 1.20-1.86) and 1.25 (95%CI 1.10-1.42) times higher odds of having any tooth loss and edentulism, respectively. Alternatively, when tooth loss or edentulism were considered as exposures, individuals with any tooth loss had 1.41 (95%CI 1.11-1.79) times higher odds for obesity, while edentates had even higher odds (OR 1.60; 95%CI 1.29-2.00). The results indicate a bi-directional association between tooth loss and obesity. Considering that all selected studies were of cross-sectional study design limiting inferences on temporality, longitudinal prospective studies are required to test the causal relationship between tooth loss/edentulism and obesity or vice a versa. © 2016 World Obesity.
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Affiliation(s)
- G G Nascimento
- Postgraduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil
| | - F R M Leite
- Postgraduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil
| | - D A Conceição
- Postgraduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil
| | - C P Ferrúa
- Postgraduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil.,Postgraduate Program in Health and Behavior, Catholic University of Pelotas, Pelotas, Brazil
| | - A Singh
- Australian Research Centre for Population Oral Health (ARCPOH), School of Dentistry, The University of Adelaide, Adelaide, Australia
| | - F F Demarco
- Postgraduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil.,Postgraduate Program in Epidemiology, School of Medicine, Federal University of Pelotas, Pelotas, Brazil
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de Azambuja Carvalho PH, Duval AR, Manzolli Leite FR, Nedel F, Cunico W, Lund RG. (7-Chloroquinolin-4-yl)arylhydrazones: Candida albicans enzymatic repression and cytotoxicity evaluation, Part 2. J Enzyme Inhib Med Chem 2015; 31:126-31. [PMID: 25807296 DOI: 10.3109/14756366.2015.1010527] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE This work describes the anti-enzymatic activity of (7-chloroquinolin-4-yl)arylhydrazones against Candida albicans and examines their cytotoxicity. MATERIAL AND METHODS Ten C. albicans strains [nine isolates and one azole-resistant standard strain (ATCC 62342)] were used to assess the anti-enzymatic activity. Fifteen compounds at sub-antifungal concentrations ranging from 12.5 to 100 µg/ml were assessed after a 30-min exposure. The strains were seeded onto petri dishes with selective agar media for aspartyl proteases (Saps) and phospholipases (PLs). Enzymatic inhibition was measured by the reduction of the precipitation zone (Pz) against untreated strains (positive control). A colorimetric MTT assay was used with 3T3/NIH mouse fibroblasts to evaluate cytotoxicity. Cells were exposed to 15 compounds in concentrations from 6.25 to 100 µg/ml for 24 and 48 h. RESULTS Four hydrazones showed enzymatic repression values over 40% to Pl and three over 20% to Saps. The cell viability was over 50% at hydrazone concentrations of 25-100 µg/ml. CONCLUSION These results revealed that select (7-chloroquinolin-4-yl)arylhydrazones may be potential antifungal agents for the control of C. albicans infections.
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Affiliation(s)
| | - Auri Rocha Duval
- b LaQuiABio - Laboratory of Bioactive Applied Chemistry , Center of Chemical, Pharmaceutical and Food Sciences (CCQFA), Federal University of Pelotas , Pelotas , RS , Brazil
| | - Fabio Renato Manzolli Leite
- c Clinics and Semiology Department , Pelotas Dental School, Federal University of Pelotas , Pelotas , RS , Brazil
| | - Fernanda Nedel
- d Cell and Tissue Biology Nucleus (NCTBio), Post-Graduate Program in Dentistry, Pelotas Dental School, Federal University of Pelotas , Pelotas , RS , Brazil .,e Post-Graduate Program in Health and Behavior, Catholic University of Pelotas , Pelotas , RS , Brazil , and
| | - Wilson Cunico
- b LaQuiABio - Laboratory of Bioactive Applied Chemistry , Center of Chemical, Pharmaceutical and Food Sciences (CCQFA), Federal University of Pelotas , Pelotas , RS , Brazil
| | - Rafael Guerra Lund
- f Post-Graduate Program in Dentistry, Pelotas Dental School, Federal University of Pelotas , Rio Grande do Sul , Brazil
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Sarmento HR, Leite FRM, Dantas RVF, Ogliari FA, Demarco FF, Faot F. A double-blind randomised clinical trial of two techniques for gingival displacement. J Oral Rehabil 2014; 41:306-13. [PMID: 24446590 DOI: 10.1111/joor.12142] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/29/2013] [Indexed: 01/23/2023]
Abstract
Knowledge about security and the potential damage originated by the gingival displacement techniques has not been described through randomised clinical studies. This crossover, double-blind, randomised clinical trial evaluated clinical and immunological factors related to conventional and cordless gingival displacement (GD) techniques, and patients' perceptions in 12 subjects with the employment of 2 GD techniques: conventional (gingival cord + 25% AlCl3 astringent gel) and cordless (15% AlCl3 astringent-based paste). In each subject, two anterior teeth were treated and a 10-day wash-out period separated the two treatments. Periodontal indices were evaluated before (baseline) and 1 and 10 days after GD. Interleukin 1β, interleukin 6 and tumour necrosis factor α concentrations in gingival crevicular fluid were measured before and 1 day after GD. Subjective parameters (pain, unpleasant taste and stress) were also evaluated. Data were analysed by one-way repeated-measures analysis of variance and Tukey's test (immunological factors), the Friedman test (periodontal parameters) and Fisher's exact or chi-squared test (subjective parameters), with a significance level of 95%. Gingival bleeding index, probing depth and plaque index values did not differ significantly between groups at any timepoint. Neither technique resulted in worse periodontal indices. Both techniques yielded similar results for pain and unpleasant taste, but conventional GD was significantly more stressful than cordless GD for volunteers. Both treatments significantly increased mean concentrations of the three cytokines, with the conventional technique producing the highest cytokine levels. Cordless GD is less stressful for patients and results in lower post-treatment levels of inflammatory cytokines compared with conventional GD.
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Affiliation(s)
- H R Sarmento
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil
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Leite FRM, Aquino SGD, Guimarães MR, Cirelli JA, Junior CR. RANKL expression is differentially modulated by TLR2 and TLR4 signaling in fibroblasts and osteoblasts. ACTA ACUST UNITED AC 2014. [DOI: 10.7243/2053-213x-2-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Pinto SCS, Leite FRM, Fontanari LA, Cavassim R, Leite AA, Bandéca MC, Borges AH, Sampaio JEC. Influence of nicotine and cotinine impregnation on the first step of periodontal regeneration: clot stabilization. J Contemp Dent Pract 2013; 14:1044-1048. [PMID: 24858748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This study analyzes the clot stabilization on root surfaces of teeth impregnated with cotinine and nicotine and the influence of the scaling in the adhesion of blood components, observing the influence of new exposition to nicotine and/or cotinine after scaling. Fifteen human teeth extracted due to periodontal disease of non-smokers patients were selected and manually scaled. Four dentin blocks were obtained from each tooth (n = 60). Samples received blood application or reimpregnation with nicotine and/or cotinine, depending on the groups. Group 1: PBS immersion + root scaling + blood; group 2: nicotine + root scaling + blood; group 3: nicotine + root scaling + nicotine reapplication + blood; group 4: cotinine + root scaling + blood; group 5: cotinine + root scaling + cotinine reapplication+ blood; group 6: nicotine and cotinine + root scaling + nicotine and cotinine + blood. Samples were kept in 2 ml of each substance for 24 hours. Each group received a blood drop and was analyzed by SEM. The higher amount of blood components was present in teeth exposed to cotinine and the groups submitted to scaling and blood application in comparison with groups that received reapplication of toxic substances after scaling. The greater toxic effect on root dentin surface was after the exposure to nicotine and cotinine. Results suggest that periodontal healing may be delayed in smokers due to the direct inhibition of clot stabilization on the root surface when nicotine and cotinine are present concomitantly.
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Affiliation(s)
| | | | - Lucas Amaral Fontanari
- Student, Department of Oral Diagnosis and Surgery, Araraquara Dental School, UNESP, Brazil
| | - Rodrigo Cavassim
- Student, Department of Oral Diagnosis and Surgery, Araraquara Dental School, UNESP, Brazil
| | | | - Matheus Coelho Bandéca
- Professor, Department of Postgraduation in Dentistry, CEUMA University, São Luis, Brazil
| | - Alvaro Henrique Borges
- Professor, Program in Integrated Dental Sciences, University of Cuiabá, Cuiabá, MT, Brazil
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Manzolli Leite FR, Nascimento GG, Manzolli Leite ER, Leite AA, Cezar Sampaio JE. Effect of the association between citric acid and EDTA on root surface etching. J Contemp Dent Pract 2013; 14:796-800. [PMID: 24685777 DOI: 10.5005/jp-journals-10024-1405] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVE This study aims to compare the clot stabilization on root surfaces conditioned with citric acid and ethylenediamine-tetraacetic acid (EDTA). MATERIALS AND METHODS Scaled root samples (n = 100) were set in fve groups: group I-control group (saline solution); group II (24% EDTA); group III (25% citric acid); group IV (EDTA + citric acid); group V (citric acid + EDTA). Fifty samples were assessed using the root surface modifcation index (RSMI). The other 50 received a blood drop after conditioning. Clot formation was assessed using blood elements adhesion index (BEAI). A blind examiner evaluated photomicrographs. Statistical analysis considered p < 0.05. RESULTS Groups-III and G-V attained the best results for RSMI and BEAI in comparison to control. The worst results for clot stabilization were seen in group-II. EDTA employment before citric acid (group-IV) reduced clot formation in comparison to citric acid use alone (group-III). CONCLUSION Root conditioning with citric acid alone and before EDTA had the best results for smear layer removal and clot stabilization. EDTA inhibited clot stabilization on root surface and must have a residual activity once it has diminished clot adhesion to root even after citric acid conditioning. Thus, EDTA can be used to neutralize citric acid effects on periodontal cells without affecting clot stabilization. Clinical signifcance: To demonstrate that citric acid use on root surfaces previously affected by periodontal disease may favor clot stabilization and may have a benefcial effect on surgical outcomes. Also, EDTA can be used to neutralize citric acid effects on periodontal cells.
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Affiliation(s)
- Fabio Renato Manzolli Leite
- Adjunct Professor, Department of Semiology and Clinics, Federal University of Pelotas, Rio Grande do Sul, Brazil, Phone: 555332256741 e-mail:
| | | | | | - Amauri Antiquera Leite
- Adjunct Professor, Department of Clinical Analysis, State University of São Paulo, São Paulo, Brazil
| | - Josá Eduardo Cezar Sampaio
- Adjunct Professor, Department of Diagnosis and Surgery, State University of São Paulo, São Paulo, Brazil
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14
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Dantas AAR, Fontanari LA, Ishi EDP, Leite FRM, Zandim DL, Rached RSGA, Sampaio JEC. Blood cells attachment after root conditioning and PRP application: an in vitro study. J Contemp Dent Pract 2012; 13:332-338. [PMID: 22918006 DOI: 10.5005/jp-journals-10024-1147] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
AIM Root conditioning is aimed at smear layer removal and at dental matrix collagen exposure, which may promote periodontal regeneration. This in vitro study assessed smear layer removal, collagen fiber exposure and the influence of PRP (platelet-rich plasma) application on adhesion of blood cells to the root surface using scanning electron microscopy (SEM). MATERIALS AND METHODS Scaled root samples (n = 160) were set in five groups and conditioned with: group I - control group (saline solution); group II (EDTA 24%); group III (citric acid 25%); group IV (tetracycline hydrochloride 50 mg/ml); group V (sodium citrate 30%). Eighty samples were assessed using the root surface modification index (RSMI). The other eighty samples were set in two groups. The first group (n = 40) received PRP gel application with a soft brush and the second group (n = 40) received PRP application and then a blood drop. The fibrin clot formation was assessed in the first group and the blood cells adhesion was assessed in the second group using the BEAI (blood elements adhesion index). A previously trained, calibrated, and blind examiner evaluated photomicrographs. Statistical analysis was performed using the Kruskal-Wallis's and Dunn's tests. RESULTS Group III attained the best results for RSMI and BEAI. Moreover, it was the only group showing fibrin clot formation. CONCLUSION Citric acid was the most efficient conditioner for smear layer removal, collagen fiber exposure and blood cell adhesion. Moreover, it was the only group showing fibrin clot formation after PRP application. CLINICAL SIGNIFICANCE This study demonstrated that root conditioning followed by PRP application may favor blood cell adhesion on root surface which may optimize periodontal healing.
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Affiliation(s)
- Andrea Abi Rached Dantas
- Department of Operative Dentistry, School of Dentistry at Araraquara, State University of Sao Paulo, UNESP, 1680 Humaita Street, Araraquara, 14801-903, Sao Paulo, Brazil.
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15
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Zandim DL, Leite FRM, Sampaio JEC. In vitro evaluation of the effect of dietary acids and toothbrushing on human root dentin permeability. Quintessence Int 2010; 41:257-263. [PMID: 20213027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
OBJECTIVES The purpose of this in vitro study was to quantify the alterations in human root dentin permeability after exposure to dietary acids and to evaluate the effect of toothbrushing after acid application. METHOD AND MATERIALS Extracted human third molars had their crowns sectioned above the CEJ, pulp tissue removed, and cervical root dentin exposed using a high-speed bur (approximately 1 mm in depth of substance loss). From each root fragment, one specimen was prepared. A total of 25 specimens were used and distributed randomly into five groups. The specimens were attached to a hydraulic pressure apparatus to evaluate the alterations of root dentin permeability after exposure to different acids. Dentin permeability was measured after the following sequential steps: (1) treatment with EDTA for 3 minutes to obtain the maximum permeability; (2) root planing to create a smear layer; (3) exposure to different acidic substances for 5 minutes (vinegar, cola drink, lemon juice, white wine, and orange juice); and (4) brushing for 3 minutes. RESULTS All acidic substances increased dentin permeability after root planing. Lemon juice produced higher values for permeability when compared to the other substances (P = .009); moreover, orange juice showed similar results (P < .02) except when compared to vinegar (P = .12). Brushing right after acid exposure significantly reduced dentin permeability except in the vinegar group (P = .07). CONCLUSION Under the experimental conditions, dietary acids increased root dentin permeability, and immediate brushing reduced permeability levels.
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Affiliation(s)
- Daniela Leal Zandim
- Department of Diagnostic and Oral Surgery, School of Dentistry at Araraquara, São Paulo State University, Araraquara, São Paulo, Brazil
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Garcia de Aquino S, Manzolli Leite FR, Stach-Machado DR, Francisco da Silva JA, Spolidorio LC, Rossa C. Signaling pathways associated with the expression of inflammatory mediators activated during the course of two models of experimental periodontitis. Life Sci 2009; 84:745-54. [PMID: 19285515 DOI: 10.1016/j.lfs.2009.03.001] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2008] [Revised: 02/19/2009] [Accepted: 03/01/2009] [Indexed: 10/21/2022]
Abstract
AIMS Evaluate the signaling pathways associated with inflammatory mediators activated in two models of experimental periodontitis. MAIN METHODS Two models were used: lipopolysaccharide (LPS) injections and ligature placement. Wistar rats were used and 30 microg LPS from Escherichia coli was injected twice a week into the palatal aspect of the upper molars. Ligatures were placed around lower first molars. A control group received injections of PBS on the palatal gingivae whereas no ligatures were placed on the lower molars. Samples were collected 5, 15 and 30 days and processed for analysis by Western blotting and stereometry. KEY FINDINGS The ligature model was associated with rapid and transient activation of extracellular-regulated kinases (ERK) and p38 mitogen-activated protein kinase (MAPK) as well as of nuclear factor kappa B (NF-kappaB). Activation of these signaling pathways on the LPS model was delayed but sustained throughout the 30-day experimental period. Inflammatory changes induced by both models were similar; however there was a significant reduction on inflammation degree on the ligature model, which paralleled the decrease observed on the activation of the signaling pathways. Activation of signal transducer and activator of transcription (STAT)-3 by phosphorylation of Tyrosine residues and of STAT-5 was observed only on the ligature model. SIGNIFICANCE Regulation of gene expression results from the activation of signaling pathways initiated by receptor-ligand binding of external antigens and also of cytokines produced by the host immune system. Understanding the signaling pathways relevant for a given condition may provide information useful for novel therapeutic approaches.
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Affiliation(s)
- Sabrina Garcia de Aquino
- Department of Diagnosis and Surgery, School of Dentistry at Araraquara, State University of Sao Paulo, Rua Humaita, 1680-Centro, Araraquara, SP 14801-903, Brazil
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