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Tassery H, Miletic I, Turkun LS, Sauro S, Gurgan S, Banerjee A, Basso M, Khelafia S, Terrer E, Pilliol V, Slimani A. Preventive management of carious lesions: from non-invasive to micro-invasive operative interventions. Br Dent J 2024; 236:603-610. [PMID: 38671111 DOI: 10.1038/s41415-024-7292-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/05/2024] [Accepted: 01/14/2024] [Indexed: 04/28/2024]
Abstract
Understanding that dental carious lesions occur as a result of the action of micro-organisms in the dental plaque biofilm, where demineralisation on the tooth surface is the first sign of the disease, such incipient lesions can be treated using preventive, non-operative and minimally invasive operative dentistry. If the caries process is left unmanaged, the lesions progress towards cavitation, leading to more invasive treatments. This article discusses the principles of preventive, non-invasive and micro-invasive treatments of early carious lesions, outlining the clinical situations where these therapies can be applied.
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Affiliation(s)
- Hervé Tassery
- Ecole de Médecine Dentaire de Marseille, Université d'Aix-Marseille, 13385 Marseille, France; Institut Hospitalo-Universitaire Méditerranée-Infection, Aix-Marseille Université, MEPHI, AP-HM, 19-21 Boulevard Jean Moulin, 13385 Marseille, CEDEX 05, France; LBN, Université de Montpellier, UR-UM104, Montpellier, France.
| | - Ivana Miletic
- Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Gunduliceva ul. 5, 10000 Zagreb, Croatia
| | - Lezize Sebnem Turkun
- Department of Restorative Dentistry, Ege University School of Dentistry, Izmir 35040, Turkey
| | - Salvatore Sauro
- Dental Biomaterials and Minimally Invasive Dentistry, Department of Dentistry, CEU Cardenal Herrera University, CEU Universities, 46115 Valencia, Spain; Department of Therapeutic Dentistry, I. M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - Sevil Gurgan
- Department of Restorative Dentistry, Faculty of Dentistry, Hacettepe University, Ankara 06100, Turkey
| | - Avijit Banerjee
- Conservative and Minimally Invasive Dentistry, Centre of Oral Clinical Translational Sciences, Faculty of Dentistry, Oral and Craniofacial Sciences, King´s College London, London, SE1 9RT, UK
| | - Matteo Basso
- Department of Biomedical, Surgical and Dental Sciences, University of Milano, Via Festa del Perdono 7, 20122 Milano, Italy
| | - Saber Khelafia
- Institut Hospitalo-Universitaire Méditerranée-Infection, Aix-Marseille Université, MEPHI, AP-HM, 19-21 Boulevard Jean Moulin, 13385 Marseille, CEDEX 05, France
| | - Elodie Terrer
- Ecole de Médecine Dentaire de Marseille, Université d'Aix-Marseille, 13385 Marseille, France; Institut Hospitalo-Universitaire Méditerranée-Infection, Aix-Marseille Université, MEPHI, AP-HM, 19-21 Boulevard Jean Moulin, 13385 Marseille, CEDEX 05, France
| | - Virginie Pilliol
- Ecole de Médecine Dentaire de Marseille, Université d'Aix-Marseille, 13385 Marseille, France; Institut Hospitalo-Universitaire Méditerranée-Infection, Aix-Marseille Université, MEPHI, AP-HM, 19-21 Boulevard Jean Moulin, 13385 Marseille, CEDEX 05, France
| | - Amel Slimani
- LBN, Université de Montpellier, UR-UM104, Montpellier, France; Faculté d'Odontologie, Université de Montpellier, 34193 Montpellier, France
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Carrouel F, Kanoute A, Lvovschi VE, Bourgeois D. Periodontal pathogens of the interdental microbiota in a 3 months pregnant population with an intact periodontium. Front Microbiol 2023; 14:1275180. [PMID: 38029104 PMCID: PMC10646527 DOI: 10.3389/fmicb.2023.1275180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 10/05/2023] [Indexed: 12/01/2023] Open
Abstract
Steroid hormones and the oral microbiota of pregnant women both appear as cumulative risk factors for gingivitis. This cross-sectional study, using real-time PCR, investigated the composition and diversity of the microbiota in interdental spaces of 3 months pregnant women with intact periodontium according the 2018 EFP/AAP classification. Bacteria identified were belonged to the red (Porphyromonas gingivalis Treponema denticola, and Tanerella forsythia), orange (Fusobacterium nucleatum, Prevotella intermedia, Campylobacter rectus, and Parvimonas micra), and green (Eikenella corrodens and A. actinomycetencomitans) Socransky complexes. Approximatively 109.11 bacteria were counted per interdental space in pregnant women. Bacteria from the red complex represented 33.80% versus 62.81% for the orange group versus 3.39% for the green group of the total number spread over the 3 groups. Dietary habits and physical activity did not have a significant impact on interdental microbiota, although a decrease in the median amount of 9 periodontopathogens was observed when fruit and vegetable consumption increased. Pregnant women who brushed their teeth at least twice a day had lower counts of total bacteria and 9 periodontal pathogens than those who brushed less. In 3 months pregnant women at high risk of periodontal disease (>30% bleeding sites), the dendogram revealed 2 clusters of the 9 periodontopathogens. This provides further support for the "key pathogen" hypothesis, among which Porphyromonas gingivalis plays a key role, indicating that specific bacteria in limited quantities can influence the host immune system and convert the microbiota from symbiotic to dysbiotic to induce inflammatory disorder. As a result, this study reported that 3 months pregnant women with healthy periodontium had high levels of interdental bleeding and a dysbiotic microbiota with periodontal pathogens of the Socransky orange and red complexes. These subjects were therefore potentially at increased risk of developing periodontal disease and, consequently, an adverse pregnancy outcome. So, preventive oral prophylaxis measures, in particular individual interdental prophylaxis, should be implemented as soon as pregnancy is established.
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Affiliation(s)
- Florence Carrouel
- Laboratory “Health, Systemic, Process” (P2S), UR4129, University Claude Bernard Lyon 1, Lyon, France
| | - Aida Kanoute
- Public Health Service, Department of Dentistry, Cheikh Anta Diop University, Dakar, Senegal
| | - Virginie-Eve Lvovschi
- Laboratory “Research on Healthcare Performance” (RESHAPE), INSERM U1290, University Claude Bernard Lyon 1, Lyon, France
- Hospices Civils of Lyon, Lyon, France
| | - Denis Bourgeois
- Laboratory “Health, Systemic, Process” (P2S), UR4129, University Claude Bernard Lyon 1, Lyon, France
- Hospices Civils of Lyon, Lyon, France
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In vitro antimicrobial effects of chitosan on microcosm biofilms of oral candidiasis. J Dent 2022; 125:104246. [PMID: 35914573 DOI: 10.1016/j.jdent.2022.104246] [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: 04/08/2022] [Revised: 07/23/2022] [Accepted: 07/29/2022] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVE This study assessed the effects of chitosan (CS) on microcosm biofilms derived from saliva of patients with Candida-associated denture stomatitis. METHODS Five removable denture wearers with denture stomatitis were included in the study. The minimum inhibitory concentration (MIC) of CS against clinical isolates of Candida albicans was determined according to the broth microdilution method. Pooled saliva from the donors was used as an inoculum for the formation of biofilms, which were developed during 72 h on acrylic surfaces in the Amsterdam Active Attachment model. The biofilms were then treated with different concentrations of CS, and the antibiofilm effects were evaluated through the quantification of colony-forming units (CFUs), total biomass (TB), metabolic activity (MA), lactic acid production (LAP), and cell viability (by confocal laser scanning microscopy). Chlorhexidine, miconazole, and nystatin were tested as positive controls, while the negative control (NC) was the untreated biofilm. Data were analyzed by 1-way ANOVA and Fischer LSD's post hoc test (α=0.05). RESULTS MIC values of CS ranged from 500 to 800 µg/mL. For CFUs, 2500 µg/mL CS was the most effective treatment in reducing total anaerobes, mutans streptococci, and Lactobacillus spp., significantly differing from the controls. For C. albicans CFUs, CS and positive controls did not differ from each other but led to significant reductions compared to NC. Regarding TB, MA, LAP, and cell viability, 2500 µg/mL CS promoted the greatest reductions compared to NC. CONCLUSION CS has similar or superior effects to conventional active principles on important parameters of oral candidiasis microcosm biofilms. CLINICAL RELEVANCE The antibiofilm effects of CS show that this compound has great potential to improve the clinical condition of denture stomatitis patients, and formulations containing this natural polymer could be useful for controlling oral candidiasis.
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Fakhruddin KS, Samaranayake LP, Hamoudi RA, Ngo HC, Egusa H. Diversity of site-specific microbes of occlusal and proximal lesions in severe- early childhood caries (S-ECC). J Oral Microbiol 2022; 14:2037832. [PMID: 35173909 PMCID: PMC8843124 DOI: 10.1080/20002297.2022.2037832] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 01/31/2022] [Accepted: 02/01/2022] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Severe-early childhood caries (S-ECC) a global problem of significant concern, commonly manifest on the occlusal, and proximal surfaces of affected teeth. Despite the major ecological differences between these two niches the compositional differences, if any, in the microbiota of such lesions is unknown. METHODS Deep-dentine caries samples from asymptomatic primary molars of children with S-ECC (n 19) belonging to caries-code 5/6, (ICDAS classification) were evaluated. Employing two primer pools, we amplified and compared the bacterial 16S rRNA gene sequences of the seven hypervariable regions (V2-V4 and V6-V9) using NGS-based assay. RESULTS Bray-Curtisevaluation indicated that occlusal lesions (OL) had a more homogeneous community than the proximal lesions (PL) with significant compositional differences at the species level (p = 0.01; R- 0.513). Together, the occlusal and proximal niches harbored 263 species, of which 202 (76.8%) species were common to both , while 49 (18.6%) and 12 (4.6%) disparate species were exclusively isolated from the proximal and occlusal niches, respectively. The most commonl genera at both niches included Streptococcus, Prevotella, and Lactobacillus. S. mutans was predominant in PL (p ≤ 0.05), and Atopobium parvulum (p = 0.01) was predominant in OL. CONCLUSIONS Distinct differences exist between the caries microbiota of occlusal and proximal caries in S-ECC.
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Affiliation(s)
- Kausar Sadia Fakhruddin
- Department of Preventive and Restorative Dentistry, University of Sharjah, Sharjah, UAE
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai-city, Japan
| | | | - Rifat Akram Hamoudi
- Sharjah Institute for Medical Research, College of Medicine, University of Sharjah, Sharjah, UAE
- Division of Surgery and Interventional Science, University College London, London, UK
| | - Hien Chi Ngo
- Uwa Dental School, The University of Western Australia, Perth, Australia
| | - Hiroshi Egusa
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai-city, Japan
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Difloe-Geisert JC, Fiedler S, Kulik EM, Schlueter N, Ganss C, Walter C. Interdental biofilm reduction and composition after use of an activated and inactivated side-to-side toothbrush - a proof-of-principle clinical study. Clin Oral Investig 2022; 26:2909-2919. [PMID: 35018500 DOI: 10.1007/s00784-021-04273-0] [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: 08/09/2021] [Accepted: 11/01/2021] [Indexed: 11/03/2022]
Abstract
OBJECTIVES To evaluate interdental biofilm reduction and composition after powered toothbrushing with a side-to-side (sonic) toothbrush compared to manual toothbrushing following single brushing exercises in periodontally healthy young adults. MATERIALS AND METHODS All participants brushed with a side-to-side toothbrush without toothpaste in four different modes: toothbrush (a) inactivated without instruction (OFF-NI), (b) activated without instruction (ON-NI), (c) inactivated with instruction (OFF-I), and (d) activated with instruction (ON-I) at consecutive visits (single brushing exercises). Before and after brushing, the Approximal Plaque Index (API) was assessed at three interdental spaces and plaque samples were taken from two interdental sites. Biofilm reduction and composition were analyzed microbiologically by total bacterial load and 16S rRNA sequencing. RESULTS Thirty participants (age: 22.9 ± 2.5 years) completed the study. Most participants showed no or incomplete plaque removal assessed by API following single brushing exercises, while the frequency of API reduction was higher after ON-NI compared to OFF-I (p = 0.023). Irrespective of the brushing mode, a significant reduction of total bacterial load was detected with lower bacterial counts after OFF-NI compared to ON-NI (p = 0.008) and ON-I (p = 0.007). Biofilm composition showed slight changes in the relative abundances of bacterial taxa, regardless of the brushing mode. CONCLUSIONS Manual and powered toothbrushing with a side-to-side toothbrush, with and without instruction, showed incomplete interdental biofilm removal in periodontally healthy young adults following single brushing exercises. CLINICAL RELEVANCE Data has to be validated in further studies on other groups, however, in periodontally healthy young adults, additional devices seem to be necessary for sufficient interdental cleaning.
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Affiliation(s)
- Julia C Difloe-Geisert
- Department of Periodontology, Endodontology and Cariology, University Center for Dental Medicine Basel (UZB), University of Basel, Mattenstrasse 40, 4058, Basel, Switzerland.
| | - Sarah Fiedler
- Division for Cariology, Department of Operative Dentistry and Periodontology, Center for Dental Medicine, Medical Center University of Freiburg, University of Freiburg, Freiburg, Germany
| | - Eva M Kulik
- Department Research, University Center for Dental Medicine Basel (UZB), University of Basel, Basel, Switzerland
| | - Nadine Schlueter
- Division for Cariology, Department of Operative Dentistry and Periodontology, Center for Dental Medicine, Medical Center University of Freiburg, University of Freiburg, Freiburg, Germany
| | - Carolina Ganss
- Department of Conservative and Preventive Dentistry, Dental Clinic, Justus Liebig University, Giessen, Germany
| | - Clemens Walter
- Department of Restorative Dentistry, Periodontology, Endodontology, and Preventive and Pediatric Dentistry, University Medicine Greifswald, Greifswald, Germany
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Fakhruddin KS, Perera Samaranayake L, Egusa H, Ngo HC, Pesee S. Profuse diversity and acidogenicity of the candida-biome of deep carious lesions of Severe Early Childhood Caries (S-ECC). J Oral Microbiol 2021; 13:1964277. [PMID: 34447489 PMCID: PMC8386706 DOI: 10.1080/20002297.2021.1964277] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Introduction: The retentive niches of deep caries lesions have a distinct biome. Methods: We evaluated the site-specific (occlusal and proximal) Candida-biome of Severe-Early Childhood Caries (S-ECC) in 66- children (132 lesions). Asymptomatic primary molars fitting the definition of the International Caries Detection and Assessment-(ICDAS)-caries-code 5/6 were analyzed. Deep-dentinal sampling and simultaneous assessment of pH were performed. Clinical isolates were speciated using multiplex-PCR and evaluated for their acidogenic and aciduric potential.Results: Surprisingly, a high prevalence of Candida species (72.7%), either singly or in combination, was noted from both the proximal and occlusal cavities. C. tropicalis was the most prevalent species (47%; 34/72), followed by C. krusei (43.1%; 31/72) and C. albicans (40.3%; 29/72), with C. glabrata being the least (9.7%; 7/72). Over 45% low-pH niches (pH <7) of both sites yielded either dual or triple species of Candida. Genotyping revealed three distinct C. albicans genotypes (A, B, and C) with (14/29; 48.3%) of strains belonging to Genotype A. All four evaluated Candida species exhibited acidogenic and aciduric potential, C. tropicalis being the most potent.Conclusion: This, the first report of the high-density, multispecies, yeast colonization of deep-dentinal lesions in S-ECC, suggests that the Candida-biome plays a significant etiologic role in the condition, possibly due to their profound acidogenicity in milieus rich in dietary carbohydrates.
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Affiliation(s)
| | | | - Hiroshi Egusa
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan
| | - Hien Chi Ngo
- University of Western Australia, Perth, Australia
| | - Siripen Pesee
- Faculty of Dentistry, Department of Oral Diagnostic Science, Faculty of Dentistry, Thammasat University, Pathum Thani, Thailand
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Lee E, Park S, Um S, Kim S, Lee J, Jang J, Jeong HO, Shin J, Kang J, Lee S, Jeong T. Microbiome of Saliva and Plaque in Children According to Age and Dental Caries Experience. Diagnostics (Basel) 2021; 11:1324. [PMID: 34441259 PMCID: PMC8393408 DOI: 10.3390/diagnostics11081324] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/20/2021] [Accepted: 07/20/2021] [Indexed: 01/20/2023] Open
Abstract
Dental caries are one of the chronic diseases caused by organic acids made from oral microbes. However, there was a lack of knowledge about the oral microbiome of Korean children. The aim of this study was to analyze the metagenome data of the oral microbiome obtained from Korean children and to discover bacteria highly related to dental caries with machine learning models. Saliva and plaque samples from 120 Korean children aged below 12 years were collected. Bacterial composition was identified using Illumina HiSeq sequencing based on the V3-V4 hypervariable region of the 16S rRNA gene. Ten major genera accounted for approximately 70% of the samples on average, including Streptococcus, Neisseria, Corynebacterium, and Fusobacterium. Differential abundant analyses revealed that Scardovia wiggsiae and Leptotrichia wadei were enriched in the caries samples, while Neisseria oralis was abundant in the non-caries samples of children aged below 6 years. The caries and non-caries samples of children aged 6-12 years were enriched in Streptococcus mutans and Corynebacterium durum, respectively. The machine learning models based on these differentially enriched taxa showed accuracies of up to 83%. These results confirmed significant alterations in the oral microbiome according to dental caries and age, and these differences can be used as diagnostic biomarkers.
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Affiliation(s)
- Eungyung Lee
- Department of Pediatric Dentistry, Dental Research Institute, Pusan National University Dental Hospital, Yangsan 50612, Korea; (E.L.); (J.S.)
| | - Suhyun Park
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea; (S.P.); (S.K.); (J.L.); (J.J.); (H.-o.J.)
| | | | - Seunghoon Kim
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea; (S.P.); (S.K.); (J.L.); (J.J.); (H.-o.J.)
| | - Jaewoong Lee
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea; (S.P.); (S.K.); (J.L.); (J.J.); (H.-o.J.)
| | - Jinho Jang
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea; (S.P.); (S.K.); (J.L.); (J.J.); (H.-o.J.)
| | - Hyoung-oh Jeong
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea; (S.P.); (S.K.); (J.L.); (J.J.); (H.-o.J.)
| | - Jonghyun Shin
- Department of Pediatric Dentistry, Dental Research Institute, Pusan National University Dental Hospital, Yangsan 50612, Korea; (E.L.); (J.S.)
- Department of Pediatric Dentistry, School of Dentistry, Institute of Translational Dental Science, Pusan National University, Yangsan 50612, Korea
| | | | - Semin Lee
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea; (S.P.); (S.K.); (J.L.); (J.J.); (H.-o.J.)
| | - Taesung Jeong
- Department of Pediatric Dentistry, Dental Research Institute, Pusan National University Dental Hospital, Yangsan 50612, Korea; (E.L.); (J.S.)
- Department of Pediatric Dentistry, School of Dentistry, Institute of Translational Dental Science, Pusan National University, Yangsan 50612, Korea
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Gare J, Kanoute A, Meda N, Viennot S, Bourgeois D, Carrouel F. Periodontal Conditions and Pathogens Associated with Pre-Eclampsia: A Scoping Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18137194. [PMID: 34281133 PMCID: PMC8297070 DOI: 10.3390/ijerph18137194] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 07/01/2021] [Accepted: 07/03/2021] [Indexed: 02/06/2023]
Abstract
BACKGROUND Pre-eclampsia, the second most frequent direct source of maternal mortality, is a multisystem gestational disorder characterized by proteinuria and maternal hypertension after the 20th gestational week. Although the causes of pre-eclampsia are still discussed, research has suggested that the placenta has a central place in the pathogenesis of this disease. Moreover, current surveys indicated that periodontal disorders observed during the pregnancy and more particularly, periodontal pathogens could be link to the risk of pre-eclampsia. OBJECTIVES This article aims to review recent studies focusing on periodontal conditions and pathogens associated with pre-eclampsia. METHODS The process followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews guidelines. RESULTS Metabolic conditions, immunological changes, fluctuating progesterone and estrogen levels of the pregnant woman induce a dysbiosis of the oral microbiota and contribute to increase inflammation of periodontal tissues. Periodontal pathogens could diffuse through the bloodstream inducing a placenta inflammatory response as well as inflammatory molecules produced in response to periodontopathogens could migrate through the bloodstream leading to a placenta inflammatory response. Also, periodontopathogens can colonize the vaginal microbiota through the gastrointestinal tract or during oro-genital contacts. CONCLUSION A cumulative bi-directional relationship between periodontal conditions, pathogens and the pre-eclampsia exists.
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Affiliation(s)
- Jocelyne Gare
- Laboratory P2S (Health Systemic Process), UR4129, University Claude Bernard of Lyon 1, University of Lyon, Lyon, France; (J.G.); (S.V.); (D.B.)
- Public Health Laboratory (LASAP), ED2S Doctoral School of Sciences and Health, University Joseph Ki Zerbo, Ouagadougou 7021, Burkina Faso;
| | - Aida Kanoute
- Public Health Service, Department of Dentistry, Faculty of Medicine, Pharmacy and Dentistry, University Cheikh Anta Diop, Dakar 10700, Senegal;
| | - Nicolas Meda
- Public Health Laboratory (LASAP), ED2S Doctoral School of Sciences and Health, University Joseph Ki Zerbo, Ouagadougou 7021, Burkina Faso;
| | - Stephane Viennot
- Laboratory P2S (Health Systemic Process), UR4129, University Claude Bernard of Lyon 1, University of Lyon, Lyon, France; (J.G.); (S.V.); (D.B.)
| | - Denis Bourgeois
- Laboratory P2S (Health Systemic Process), UR4129, University Claude Bernard of Lyon 1, University of Lyon, Lyon, France; (J.G.); (S.V.); (D.B.)
| | - Florence Carrouel
- Laboratory P2S (Health Systemic Process), UR4129, University Claude Bernard of Lyon 1, University of Lyon, Lyon, France; (J.G.); (S.V.); (D.B.)
- Correspondence: ; Tel.: +33-4-78-78-57-44
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Soffritti I, D’Accolti M, Fabbri C, Passaro A, Manfredini R, Zuliani G, Libanore M, Franchi M, Contini C, Caselli E. Oral Microbiome Dysbiosis Is Associated With Symptoms Severity and Local Immune/Inflammatory Response in COVID-19 Patients: A Cross-Sectional Study. Front Microbiol 2021; 12:687513. [PMID: 34248910 PMCID: PMC8261071 DOI: 10.3389/fmicb.2021.687513] [Citation(s) in RCA: 79] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 05/07/2021] [Indexed: 12/14/2022] Open
Abstract
The human oral microbiome (HOM) is the second largest microbial community after the gut and can impact the onset and progression of several localized and systemic diseases, including those of viral origin, especially for viruses entering the body via the oropharynx. However, this important aspect has not been clarified for the new pandemic human coronavirus SARS-CoV-2, causing COVID-19 disease, despite it being one of the many respiratory viruses having the oropharynx as the primary site of replication. In particular, no data are available about the non-bacterial components of the HOM (fungi, viruses), which instead has been shown to be crucial for other diseases. Consistent with this, this study aimed to define the HOM in COVID-19 patients, to evidence any association between its profile and the clinical disease. Seventy-five oral rinse samples were analyzed by Whole Genome Sequencing (WGS) to simultaneously identify oral bacteria, fungi, and viruses. To correlate the HOM profile with local virus replication, the SARS-CoV-2 amount in the oral cavity was quantified by digital droplet PCR. Moreover, local inflammation and secretory immune response were also assessed, respectively by measuring the local release of pro-inflammatory cytokines (L-6, IL-17, TNFα, and GM-CSF) and the production of secretory immunoglobulins A (sIgA). The results showed the presence of oral dysbiosis in COVID-19 patients compared to matched controls, with significantly decreased alpha-diversity value and lower species richness in COVID-19 subjects. Notably, oral dysbiosis correlated with symptom severity (p = 0.006), and increased local inflammation (p < 0.01). In parallel, a decreased mucosal sIgA response was observed in more severely symptomatic patients (p = 0.02), suggesting that local immune response is important in the early control of virus infection and that its correct development is influenced by the HOM profile. In conclusion, the data presented here suggest that the HOM profile may be important in defining the individual susceptibility to SARS-CoV-2 infection, facilitating inflammation and virus replication, or rather, inducing a protective IgA response. Although it is not possible to determine whether the alteration in the microbial community is the cause or effect of the SARS-CoV-2 replication, these parameters may be considered as markers for personalized therapy and vaccine development.
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Affiliation(s)
- Irene Soffritti
- Section of Microbiology, CIAS Research Center and LTTA, Department of Chemical and Pharmaceutical Sciences, University of Ferrara, Ferrara, Italy
| | - Maria D’Accolti
- Section of Microbiology, CIAS Research Center and LTTA, Department of Chemical and Pharmaceutical Sciences, University of Ferrara, Ferrara, Italy
| | - Chiara Fabbri
- Section of Dentistry, Department of Biomedical and Specialty Surgical Sciences, University of Ferrara, Ferrara, Italy
| | - Angela Passaro
- Unit of Internal Medicine, Department of Translational Medicine, University of Ferrara, Ferrara, Italy
| | - Roberto Manfredini
- Medical Clinic Unit, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Giovanni Zuliani
- Unit of Internal Medicine, Department of Translational Medicine, University of Ferrara, Ferrara, Italy
| | - Marco Libanore
- Unit of Infectious Diseases, University Hospital of Ferrara, Ferrara, Italy
| | - Maurizio Franchi
- Section of Dentistry, Department of Biomedical and Specialty Surgical Sciences, University of Ferrara, Ferrara, Italy
| | - Carlo Contini
- Section of Infectious Diseases and Dermatology, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Elisabetta Caselli
- Section of Microbiology, CIAS Research Center and LTTA, Department of Chemical and Pharmaceutical Sciences, University of Ferrara, Ferrara, Italy
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Subramanya AP, Prabhuji MLV. Comparative evaluation of efficacy and patient-reported outcome measures of oral hygiene instruction methods for calibrated interdental brush. Int J Dent Hyg 2021; 19:287-294. [PMID: 34101341 DOI: 10.1111/idh.12530] [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: 01/08/2021] [Revised: 05/07/2021] [Accepted: 05/12/2021] [Indexed: 11/27/2022]
Abstract
OBJECTIVES To compare the efficacy and patient-reported outcome measures of oral hygiene instruction methods for calibrated interdental brush. MATERIALS AND METHODS A total of 60 participants, with 30 each in control and test group, participated in the study. Clinical examination included gingival index, full mouth bleeding scores and approximal plaque index. Supragingival scaling was performed. Interdental access probe was used to assess the size of interdental brush and corresponding interdental brush were given to the participants. For the control group, oral hygiene instructions were given through demonstration with model and video. For the test group, oral hygiene instructions were given through 'Touch-to-Teach' method. At 4-week follow-up, oral hygiene instructions were repeated to respective groups. After 3 months, clinical examination was done and exit survey on patient-reported outcome measures was administered. Statistical analysis was done. RESULTS Intergroup comparison of gingival index, full mouth bleeding index and approximal plaque index showed statistically significant difference between test and control group. 'Touch-to-Teach' method of oral hygiene instruction was found to be 'Good'. Acceptance of interdental brush was regarded to be 'Good'. CONCLUSION Within limitations of the study, Touch-to-Teach method of oral hygiene instruction method was found to be effective and more acceptable and participants used the interdental brush regularly.
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Affiliation(s)
- Ashwin P Subramanya
- Department of Periodontology, Krishnadevaraya College of Dental Sciences and Hospital, Bengaluru, India
| | - M L V Prabhuji
- Department of Periodontology, Krishnadevaraya College of Dental Sciences and Hospital, Bengaluru, India
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11
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Chen X, Daliri EBM, Tyagi A, Oh DH. Cariogenic Biofilm: Pathology-Related Phenotypes and Targeted Therapy. Microorganisms 2021; 9:microorganisms9061311. [PMID: 34208588 PMCID: PMC8234214 DOI: 10.3390/microorganisms9061311] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/06/2021] [Accepted: 06/14/2021] [Indexed: 01/02/2023] Open
Abstract
The initiation and development of cariogenic (that is, caries-related) biofilms are the result of the disruption of homeostasis in the oral microenvironment. There is a daily accumulation of dental biofilm on the surface of teeth and its matrix of extracellular polymers supports the host in its defense against invading microbes, thus helping to achieve oral microbial homeostasis. However, the homeostasis can be broken down under certain circumstances such as during long-term exposure to a low pH environment which results in the dominance of acidogenic and acid-tolerating species in the dental biofilm and, thus, triggers the shift of harmless biofilm to an acidic one. This work aims to explore microbial diversity and the quorum sensing of dental biofilm and their important contributions to oral health and disease. The complex and multispecies ecosystems of the cariogenic biofilm pose significant challenges for the modulation of the oral microenvironment. Promising treatment strategies are those that target cariogenic niches with high specificity without disrupting the balance of the surrounding oral microbiota. Here, we summarized the recent advances in modulating cariogenic biofilm and/or controlling its pathogenic traits.
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12
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Kharitonova M, Vankov P, Abdrakhmanov A, Mamaeva E, Yakovleva G, Ilinskaya O. The composition of microbial communities in inflammatory periodontal diseases in young adults Tatars. AIMS Microbiol 2021; 7:59-74. [PMID: 33659769 PMCID: PMC7921377 DOI: 10.3934/microbiol.2021005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 01/19/2021] [Indexed: 12/22/2022] Open
Abstract
Host susceptibility and environmental factors are important for the development of gingivitis and periodontitis, but bacterial biofilms attached to the teeth and gingival tissues play a crucial role. We have analyzed and compared the subgingival microbial communities between subjects with dental plaque biofilm-induced generalized chronic gingivitis (CG), localized initial (Stage I) periodontitis (IP) and healthy controls (HC) of young people aged 18-19 years permanently residing in the city of Kazan (Tatarstan, Russia). The results showed that the α-diversity in groups with CG and IP was higher than in the healthy group. In a course of periodontal disease, a decrease in the relative abundance of dominates genera Rothia and Streptococcus was observed along with increase of class TM7-3 (Candidatus Saccharibacteria phylum) representatives. Also, the increase of red complex representatives Porphyromonadeceae, Treponema and Tannerella was detected together with statistically significant increase of Filifactor, Parvimonas, Peptostreptococcaceae, Veillonellaceae, Tissierelaceae and Mogibacteriaceae. Analysis of our data suggests that transition from HC to IP may be accompanied by a decrease in microbial diversity and a reduction in the abundance of family Rs-045 (Candidatus Saccharibacteria phylum), Desulfovibrionaceae Corynebacterium, Campylobacter and Selenomonas in young adults Kazan Tatars.
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Affiliation(s)
- Maya Kharitonova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kremlevskaya Str. 18, Kazan 420008, Russia
| | - Peter Vankov
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kremlevskaya Str. 18, Kazan 420008, Russia
| | - Airat Abdrakhmanov
- Department of Pediatric Dentistry, Kazan State Medical University, Butlerova Str. 49, Kazan 420012, Russia
| | - Elena Mamaeva
- Department of Pediatric Dentistry, Kazan State Medical University, Butlerova Str. 49, Kazan 420012, Russia
| | - Galina Yakovleva
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kremlevskaya Str. 18, Kazan 420008, Russia
| | - Olga Ilinskaya
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kremlevskaya Str. 18, Kazan 420008, Russia
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13
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Regulating Oral Biofilm from Cariogenic State to Non-Cariogenic State via Novel Combination of Bioactive Therapeutic Composite and Gene-Knockout. Microorganisms 2020; 8:microorganisms8091410. [PMID: 32933157 PMCID: PMC7564907 DOI: 10.3390/microorganisms8091410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/10/2020] [Accepted: 09/11/2020] [Indexed: 11/17/2022] Open
Abstract
The objectives were to investigate a novel combination of gene-knockout with antimicrobial dimethylaminohexadecyl methacrylate (DMAHDM) composite in regulating oral biofilm from a cariogenic state toward a non-cariogenic state. A tri-species biofilm model included cariogenic Streptococcus mutans (S. mutans), and non-cariogenic Streptococcus sanguinis (S. sanguinis) and Streptococcus gordonii (S. gordonii). Biofilm colony-forming-units (CFUs), lactic acid and polysaccharide production were measured. TaqMan real-time-polymerase-chain reaction was used to determine the percentage of each species in biofilm. The rnc gene-knockout for S. mutans with DMAHDM composite reduced biofilm CFU by five logs, compared to control (p < 0.05). Using parent S. mutans, an overwhelming S. mutans percentage of 68.99% and 69.00% existed in biofilms on commercial composite and 0% DMAHDM composite, respectively. In sharp contrast, with a combination of S. mutans rnc knockout and DMAHDM composite, the cariogenic S. mutans percentage in biofilm was reduced to only 6.33%. Meanwhile, the non-cariogenic S. sanguinis + S. gordonii percentage was increased to 93.67%. Therefore, combining rnc-knockout with bioactive and therapeutic dental composite achieved the greatest reduction in S. mutans, and the greatest increase in non-cariogenic species, thereby yielding the least lactic acid-production. This novel method is promising to obtain wide applications to regulate biofilms and inhibit dental caries.
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14
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The Combination of Diode Laser and Ozonated Water in the Treatment of Complicated Pulp Gangrene. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10124203] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The study aimed to investigate the effects of endodontic space decontamination using a laser combined with ozonated water in the therapy of complicated pulp gangrene. The subject of this in vivo study was a 12-year-old patient diagnosed with extensive periapical periodontitis on the mandibular right first molar. Biological samples were initially collected to identify the active pathogen—Enterococcus faecalis, then the nonsurgical endodontic treatment was performed in a single visit, according to the active disinfection guidelines of the identified pathogen. Two-month postoperative, clinical and radiological examination revealed a complete healing of the periapical lesion. The correct diagnosis of this endodontic–periodontal pathology, and the unconventional treatment of the complex system of infected root canals, allowed a favorable treatment result without any surgical intervention. This unconventional approach, which combines a laser technique with ozonated water, allows for predictable results in periapical lesion treatment.
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15
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Salehi B, Kregiel D, Mahady G, Sharifi-Rad J, Martins N, Rodrigues CF. Management of Streptococcus mutans- Candida spp. Oral Biofilms' Infections: Paving the Way for Effective Clinical Interventions. J Clin Med 2020; 9:E517. [PMID: 32075040 PMCID: PMC7074106 DOI: 10.3390/jcm9020517] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 02/10/2020] [Accepted: 02/12/2020] [Indexed: 12/18/2022] Open
Abstract
Oral diseases are considered the most common noncommunicable diseases and are related to serious local and systemic disorders. Oral pathogens can grow and spread in the oral mucosae and frequently in biomaterials (e.g., dentures or prostheses) under polymicrobial biofilms, leading to several disorders such as dental caries and periodontal disease. Biofilms harbor a complex array of interacting microbes, increasingly unapproachable to antimicrobials and with dynamic processes key to disease pathogenicity, which partially explain the gradual loss of response towards conventional therapeutic regimens. New drugs (synthesized and natural) and other therapies that have revealed promising results for the treatment or control of these mixed biofilms are presented and discussed here. A structured search of bibliographic databases was applied to include recent research. There are several promising new approaches in the treatment of Candida spp.-Streptococcus mutans oral mixed biofilms that could be clinically applied in the near future. These findings confirm the importance of developing effective therapies for oral Candida-bacterial infections.
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Affiliation(s)
- Bahare Salehi
- Student Research Committee, School of Medicine, Bam University of Medical Sciences, Bam 44340847, Iran;
| | - Dorota Kregiel
- Department of Environmental Biotechnology, Lodz University of Technology, 90-924 Lodz, Wolczanska 171/173, Poland;
| | - Gail Mahady
- Department of Pharmacy Practice, Clinical Pharmacognosy Laboratories, University of Illinois at Chicago, Chicago, IL 60612, USA;
| | - Javad Sharifi-Rad
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, Tehran 1991953381, Iran
- Department of Chemistry, Richardson College for the Environmental Science Complex, The University of Winnipeg, 599 Portage Avenue, Winnipeg, MB R3B 2G3, Canada
| | - Natália Martins
- Faculty of Medicine, University of Porto, Alameda Prof. Hernâni Monteiro, Porto 4200-319, Portugal
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto 4200-135, Portugal
| | - Célia F. Rodrigues
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal
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Inquimbert C, Bourgeois D, Giraudeau N, Tramini P, Viennot S, Dussart C, Carrouel F. Microbiota of interdental space of adolescents according to Risk of Caries: A cross-sectional study protocol. Contemp Clin Trials Commun 2019; 16:100444. [PMID: 31709310 PMCID: PMC6833308 DOI: 10.1016/j.conctc.2019.100444] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 07/21/2019] [Accepted: 08/21/2019] [Indexed: 11/21/2022] Open
Abstract
Dental caries is a major oral disease resulting from a complex interaction between the commensal microbiota, host susceptibility (heredity, immunity, diseases, etc.) and environmental factors (diet, dental hygiene, etc.). To predict the patient's risk of new carious lesions or progression of existing lesions, the Caries Risk Assessment (CRA) takes account of clinical, biological and behavioural factors. Thus, the CRA can predict whether the patient is at high or low risk of developing caries. The practitioner can thus set up a follow-up adapted to the risk of the patient. However, although bacteria are the main etiological factor of carious lesions, the CRA does not consider bacterial quantification or just focus on the level of S. mutans in the saliva. As the majority of cavities are interproximal in adolescence, the aim of this trial is to identify and quantify the interdental microbiota of adolescents aged from 15 to 17 years with low or high carious risk. So, the quantification of new biomarkers associated with carious lesion could be added to the CRA to improve it.
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Affiliation(s)
- Camille Inquimbert
- Systemic Healthcare Laboratory EA4129, Faculty of Medicine Laennec, University Lyon 1, University of Lyon, Lyon, France
- Department of Public Health, Faculty of Oral Medicine, University of Montpellier, Montpellier, France
| | - Denis Bourgeois
- Systemic Healthcare Laboratory EA4129, Faculty of Medicine Laennec, University Lyon 1, University of Lyon, Lyon, France
| | - Nicolas Giraudeau
- Department of Public Health, Faculty of Oral Medicine, University of Montpellier, Montpellier, France
| | - Paul Tramini
- Department of Public Health, Faculty of Oral Medicine, University of Montpellier, Montpellier, France
| | - Stéphane Viennot
- Systemic Healthcare Laboratory EA4129, Faculty of Medicine Laennec, University Lyon 1, University of Lyon, Lyon, France
| | - Claude Dussart
- Systemic Healthcare Laboratory EA4129, Faculty of Medicine Laennec, University Lyon 1, University of Lyon, Lyon, France
| | - Florence Carrouel
- Systemic Healthcare Laboratory EA4129, Faculty of Medicine Laennec, University Lyon 1, University of Lyon, Lyon, France
- Department of Fundamental and Clinical Biological Sciences, Faculty of Oral Medicine, University Lyon 1, University of Lyon, Lyon, France
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Carda-Diéguez M, Bravo-González LA, Morata IM, Vicente A, Mira A. High-throughput DNA sequencing of microbiota at interproximal sites. J Oral Microbiol 2019; 12:1687397. [PMID: 32002129 PMCID: PMC6853236 DOI: 10.1080/20002297.2019.1687397] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 09/26/2019] [Accepted: 10/14/2019] [Indexed: 12/22/2022] Open
Abstract
Objective: The oral microbiota has been deeply studied by high-throughput sequencing techniques. However, although the interproximal regions have one of the highest caries rates in the oral cavity, information about the bacterial composition at those sites is scarce. Methods: In this study, we used 16S rRNA Illumina sequencing to describe the microbiota associated to interproximal regions at two time points. In addition, dental plaque samples at the vestibular and lingual surfaces from the same teeth were also analysed at the two time points. Results: Interproximal-associated microbiota was found to be similar to already described bacterial communities in other mouth niches. Streptoccocus, Veillonella, Rothia, Actinomyces, Neisseria, Haemophilus and Fusobacterium were the most abundant genera in this oral region. Statistical analyses showed that the microbiota from interproximal sites was more similar to that sampled from the vestibular surfaces than to the lingual surfaces. Interestingly, many potentially cariogenic bacteria such as Scardovia, Atopobium or Selenomonas were over-represented in the interproximal regions in comparison with vestibular and lingual sites. Conclusion: The microbiota at interproximal regions appears to be specific and stable through time. Potentially pathogenic bacteria may increase caries development risk and gingival inflammation at those sites.
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Affiliation(s)
| | | | - Isabel María Morata
- Department of Orthodontics, Faculty of Medicine, University of Murcia, Murcia, Spain
| | - Ascensión Vicente
- Department of Orthodontics, Faculty of Medicine, University of Murcia, Murcia, Spain
| | - Alex Mira
- Genomics & Health Department, FISABIO Institute, Valencia, Spain
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18
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Pourhajibagher M, Ghorbanzadeh R, Bahador A. Antimicrobial properties of acrylic resins doped with Undaria pinnatifida exposed to light-emitting diode: In silico and in vitro assessments on multispecies biofilm-producing microbiota. Photodiagnosis Photodyn Ther 2019; 27:210-215. [PMID: 31185326 DOI: 10.1016/j.pdpdt.2019.05.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 05/29/2019] [Accepted: 05/31/2019] [Indexed: 02/03/2023]
Abstract
BACKGROUND This study sought to evaluates the efficiency of anti-microbial activity of acrylic resins doped with different concentrations of Undaria pinnatifida after activation with light-emitting diode (LED) at producing photodynamic damage to multispecies biofilm-producing microbiome. MATERIAL AND METHODS In this study, bioinformatics tools and computer simulation molecular modeling were used to evaluate the capacity of ferredoxin (FDX), an electron acceptor in metabolic pathways of U. pinnatifida, which can discharge electrons produced from photo-excited chlorophyll-a (Chl-a) by LED irradiation. Acrylic resin discs containing different concentration of U. pinnatifida (0, 0.5, 1, and 2%) were fabricated and were subjected to LED irradiation immediately before each experiment. After continuously rinsed (up to 30 days), the antimicrobial activity of acrylic resins doped with U. pinnatifida following photo-activation was determined by disc agar diffusion, biofilm formation inhibition, and eluted component assays versus bacterial species linked to caries that constitute a mixed biofilm including Streptococcus mutans, S. sanguinis, and Lactobacillus acidophilus, as well as Candida albicans as main etiology of candidal stomatitis. RESULTS Modeling and a virtual screening analysis of FDX indicated that it is a stable protein with an iron-sulfur center that can discharge electrons produced from photo-excited Chl-a and transfers them to FDX-NADP+ reductase for NADP+ reduction in photosystem I, which is essential in the Calvin cycle for carbon assimilation. FDX acts as an electron transfer agent in the redox reactions. The results showed that growth inhibition zones were not seen around acrylic resin discs in any group. In biofilm test, the colony counts of all test microorganisms significantly decreased (36%-87%) by an increase in the percentage of U. pinnatifida in acrylic resins after photo-activation (P < 0.05). Acrylic resins doped with 2% wt. U. pinnatifida following photo-activation using LED was inhibited biofilm formation by the test microorganisms, up to 30 days of rinsing. CONCLUSION Based on the results presented here, an acrylic resin containing U. pinnatifida, even at the lowest concentration, following photo-activation using LED have antimicrobial properties against planktonic and biofilm forms of the cariogenic microorganisms as well as C. albicans.
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Affiliation(s)
- Maryam Pourhajibagher
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Abbas Bahador
- Oral Microbiology Laboratory, Department of Microbiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
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19
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Rossoni RD, Ribeiro FDC, dos Santos HFS, dos Santos JD, Oliveira NDS, Dutra MTDS, de Lapena SAB, Junqueira JC. Galleria mellonella as an experimental model to study human oral pathogens. Arch Oral Biol 2019; 101:13-22. [DOI: 10.1016/j.archoralbio.2019.03.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 02/27/2019] [Accepted: 03/03/2019] [Indexed: 12/28/2022]
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20
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Yang Y, Li H, Xu Y, Dong Y, Shan W, Shen J. Fabrication and evaluation of dental fillers using customized molds via 3D printing technology. Int J Pharm 2019; 562:66-75. [PMID: 30878588 DOI: 10.1016/j.ijpharm.2019.03.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 03/09/2019] [Accepted: 03/11/2019] [Indexed: 12/12/2022]
Abstract
In view of the high incidence and long-term treatment of dental caries, personalized dental fillers with long therapeutic action have broad application prospects in the dental clinic. The objective of this study was to fabricate and evaluate novel dental fillers using state-of-the-art 3D printing technology. Tinidazole (TNZ), a commonly used antibacterial drug in the dental clinic, was chosen as the model compound. Models of molars with carious cavities were obtained via 3D scanning. TNZ dental fillers were indirectly produced by thermal pressing using customized 3D printed molds. In addition, bio-relevant in vitro dissolution and mechanical testing methods were developed using customized 3D printed release and compression molds, respectively. It was observed that the formability, mechanical properties, and release behavior of the TNZ dental fillers were affected by mold materials, plasticizers, and release modifiers. The developed dental fillers were capable of sustained releasing TNZ over one week. The TNZ release characteristics can be tailored based on clinical requirements by varying hydroxypropyl methylcellulose E5 (HPMC-E5) concentrations and filler dimensions. Moreover, computational simulation based on the finite element method showed that the biomechanical behavior of the TNZ dental fillers met the daily use requirement. The present study demonstrated that the state-of-the-art 3D printing technology can be used to design and fabricate personalized dental fillers with high mechanical strength and "on-demand" drug release characteristics.
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Affiliation(s)
- Yan Yang
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, China; College of Pharmacy, University of Rhode Island, Kingston, USA
| | - Haichao Li
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, China
| | - Yingying Xu
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, China
| | | | - Weiguang Shan
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, China.
| | - Jie Shen
- College of Pharmacy, University of Rhode Island, Kingston, USA.
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Ei TZ, Shimada Y, Abdou A, Sadr A, Yoshiyama M, Sumi Y, Tagami J. Three-dimensional assessment of proximal contact enamel using optical coherence tomography. Dent Mater 2019; 35:e74-e82. [DOI: 10.1016/j.dental.2019.01.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Revised: 11/27/2018] [Accepted: 01/11/2019] [Indexed: 11/15/2022]
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22
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Bacterial Colonization and Tissue Compatibility of Denture Base Resins. Dent J (Basel) 2018; 6:dj6020020. [PMID: 29914101 PMCID: PMC6023505 DOI: 10.3390/dj6020020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 06/08/2018] [Accepted: 06/12/2018] [Indexed: 11/18/2022] Open
Abstract
Currently, there is minimal clinical data regarding biofilm composition on the surface of denture bases and the clinical tissue compatibility. Therefore, the aim of this experimental study was to compare the bacterial colonization and the tissue compatibility of a hypoallergenic polyamide with a frequently used PMMA resin tested intraorally in a randomized split-mouth design. Test specimens made of polyamide (n = 10) and PMMA (n = 10) were attached over a molar band appliance in oral cavity of 10 subjects. A cytological smear test was done from palatal mucosa at baseline and after four weeks. The monolayers were inspected for micronuclei. After four weeks in situ, the appliance was removed. The test specimens were immediately cultivated on non-selective and selective nutrient media. All growing colonies were identified using VITEK-MS. The anonymized results were analyzed descriptively. A total of 110 different bacterial species could be isolated, including putative pathogens. An average of 17.8 different bacterial species grew on the PMMA specimens, and 17.3 on the polyamide specimens. The highest number of different bacterial species was n = 24, found on a PMMA specimen. On the two specimens, a similar bacterial distribution was observed. Micronuclei, as a marker for genotoxic potential of dental materials, were not detected. This study indicates that the composition of bacterial biofilm developed on these resins after four weeks is not influenced by the type of resin itself. The two materials showed no cytological differences. This investigation suggests that polyamide and PMMA are suitable for clinical use as denture base material.
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