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Lemos SS, Cesar DE, ProcÓpio SW, Machado FC, Ribeiro LC, Ribeiro RA. Qualitative and quantitative molecular analysis of bacteria in root canals of primary teeth with pulp necrosis. Braz Oral Res 2020; 34:e093. [PMID: 32785473 DOI: 10.1590/1807-3107bor-2020.vol34.0093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 05/18/2020] [Indexed: 11/21/2022] Open
Abstract
Information about bacterial diversity, such as the number of each species in the root canals of primary teeth, contributes to improving our effective management of infections of endodontic origin in primary teeth. This study made a qualitative and quantitative assessment of the bacteria in the root canals of primary teeth with necrotic pulp, using the fluorescence in situ hybridization (FISH) technique. Thirty-one primary teeth with pulp necrosis from 31 children were evaluated using the FISH technique, to detect the presence and density of Aggregatibacter actinomycetemcomitans, Campylobacter rectus, Enterococcus faecalis, Fusobacterium nucleatum, Porphyromonas gingivalis, Prevotella intermedia, Prevotella nigrescens, Streptococcus, Streptococcus mutans, Streptococcus sobrinus, Tannerella forsythia and Treponema denticola. Descriptive measures explained the data related to density, and Student's t-test assessed the differences among the densities of each bacterium, according to signs and symptoms. The bacterial density was paired and correlated. All bacteria tested were detected and identified in all the samples. The average number of bacterial individuals from each species ranged from 1.9 x 108 cells/mL (S. mutans) to 3.1 x 108 cells/mL (F. nucleatum) (p > 0.05). The sum of the mean counts of each bacterium represented almost 80% of the entire microbial community. Patients with pain had significantly more T. denticola, and those with edema showed a greater density of Streptococcus and P. nigrescens (p < 0.05). This study revealed that all 12 bacteria evaluated were found in all primary teeth with pulp necrosis. There was no predominance among the species studied; all species had a similar number of individuals.
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Affiliation(s)
- Samira Salomão Lemos
- Postgraduate Program in Dentistry, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Dionéia Evangelista Cesar
- Department of Ecology and Molecular Biology of Microorganisms, Biological Sciences Institute, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Stefânia Werneck ProcÓpio
- Postgraduate Program in Dentistry, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Fernanda Campos Machado
- Department of Social and Child Dentistry, School of Dentistry, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Luiz Claudio Ribeiro
- Department of Statistics, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Rosangela Almeida Ribeiro
- Department of Social and Child Dentistry, School of Dentistry, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
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Aveiro E, Chiarelli‐Neto VM, de‐Jesus‐Soares A, Zaia AA, Ferraz CCR, Almeida JFA, Marciano MA, Feres M, Gomes BPFA. Efficacy of reciprocating and ultrasonic activation of 6% sodium hypochlorite in the reduction of microbial content and virulence factors in teeth with primary endodontic infection. Int Endod J 2020; 53:604-618. [DOI: 10.1111/iej.13261] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 12/23/2019] [Indexed: 12/11/2022]
Affiliation(s)
- E. Aveiro
- Department of Restorative Dentistry Division of Endodontics Piracicaba Dental School, State University of Campinas‐UNICAMPPiracicaba São Paulo Brazil
| | - V. M. Chiarelli‐Neto
- Department of Restorative Dentistry Division of Endodontics Piracicaba Dental School, State University of Campinas‐UNICAMPPiracicaba São Paulo Brazil
| | - A. de‐Jesus‐Soares
- Department of Restorative Dentistry Division of Endodontics Piracicaba Dental School, State University of Campinas‐UNICAMPPiracicaba São Paulo Brazil
| | - A. A. Zaia
- Department of Restorative Dentistry Division of Endodontics Piracicaba Dental School, State University of Campinas‐UNICAMPPiracicaba São Paulo Brazil
| | - C. C. R. Ferraz
- Department of Restorative Dentistry Division of Endodontics Piracicaba Dental School, State University of Campinas‐UNICAMPPiracicaba São Paulo Brazil
| | - J. F. A. Almeida
- Department of Restorative Dentistry Division of Endodontics Piracicaba Dental School, State University of Campinas‐UNICAMPPiracicaba São Paulo Brazil
| | - M. A. Marciano
- Department of Restorative Dentistry Division of Endodontics Piracicaba Dental School, State University of Campinas‐UNICAMPPiracicaba São Paulo Brazil
| | - M. Feres
- Department of Periodontology Guarulhos University‐UnG Guarulhos São Paulo Brazil
| | - B. P. F. A. Gomes
- Department of Restorative Dentistry Division of Endodontics Piracicaba Dental School, State University of Campinas‐UNICAMPPiracicaba São Paulo Brazil
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Hurley E, Barrett MPJ, Kinirons M, Whelton H, Ryan CA, Stanton C, Harris HMB, O'Toole PW. Comparison of the salivary and dentinal microbiome of children with severe-early childhood caries to the salivary microbiome of caries-free children. BMC Oral Health 2019; 19:13. [PMID: 30642327 PMCID: PMC6332856 DOI: 10.1186/s12903-018-0693-1] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 12/12/2018] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND The main objectives of this study were to describe and compare the microbiota of 1) deep dentinal lesions of deciduous teeth of children affected with severe early childhood caries (S-ECC) and 2) the unstimulated saliva of these children and 3) the unstimulated saliva of caries-free children, and to compare microbiota compositional differences and diversity of taxa in these sampled sites. METHODS Children with S-ECC and without S-ECC were recruited. The saliva of all children with and without S-ECC was sampled along with the deep dentinal microbiota from children affected by S-ECC. The salivary microbiota of children affected by S-ECC (n = 68) was compared to that of caries-free children (n = 70), by Illumina MiSeq sequencing of 16S rRNA amplicons. Finally, the caries microbiota of deep dentinal lesions of those children with S-ECC was investigated. RESULTS Using two beta diversity metrics (Bray Curtis dissimilarity and UniFrac distance), the caries microbiota was found to be distinct from that of either of the saliva groups (caries-free & caries-active) when bacterial abundance was taken into account. However, when the comparison was made by measuring only presence and absence of bacterial taxa, all three microbiota types separated. While the alpha diversity of the caries microbiota was lowest, the diversity difference between the caries samples and saliva samples was statistically significant (p < 0.001). The major phyla of the caries active dentinal microbiota were Firmicutes (median abundance value 33.5%) and Bacteroidetes (23.2%), with Neisseria (10.3%) being the most abundant genus, followed by Prevotella (10%). The caries-active salivary microbiota was dominated by Proteobacteria (median abundance value 38.2%) and Bacteroidetes (27.8%) with the most abundant genus being Neisseria (16.3%), followed by Porphyromonas (9.5%). Caries microbiota samples were characterized by high relative abundance of Streptococcus mutans, Prevotella spp., Bifidobacterium and Scardovia spp. CONCLUSIONS Distinct differences between the caries microbiota and saliva microbiota were identified, with separation of both salivary groups (caries-active and caries-free) whereby rare taxa were highlighted. While the caries microbiota was less diverse than the salivary microbiota, the presence of these rare taxa could be the difference between health and disease in these children.
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Affiliation(s)
- Eimear Hurley
- School of Microbiology, University College Cork, Room 447 Food Science Building, Cork, Ireland.,Cork University Dental School & Hospital, Cork University Hospital, Wilton, Cork, Ireland
| | - Maurice P J Barrett
- School of Microbiology, University College Cork, Room 447 Food Science Building, Cork, Ireland.,APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Martin Kinirons
- Cork University Dental School & Hospital, Cork University Hospital, Wilton, Cork, Ireland
| | - Helen Whelton
- College of Medicine & Health, University College Cork, Cork, Ireland
| | - C Anthony Ryan
- Department of Neonatology, Cork University Maternity Hospital, Wilton, Cork, Ireland
| | | | - Hugh M B Harris
- School of Microbiology, University College Cork, Room 447 Food Science Building, Cork, Ireland.,APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Paul W O'Toole
- School of Microbiology, University College Cork, Room 447 Food Science Building, Cork, Ireland. .,APC Microbiome Ireland, University College Cork, Cork, Ireland.
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Thimmegowda U, Thomas J, Bilichodmath S, Preethi N. Identification of Specific Anaerobic Bacteria in Endodontic Infections of Primary Teeth-A PCR Study. Int J Clin Pediatr Dent 2019; 12:1-4. [PMID: 31496562 PMCID: PMC6710938 DOI: 10.5005/jp-journals-10005-1573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Introduction Invasion of microorganisms and their multiplication in root canals (RCs) results in endodontic infections of primary teeth. Acute and chronic inflammation may be present in the periapical area and are based on the amount and virulence of microorganisms, especially anaerobic bacteria present in the RC. To identify microorganisms very precisely in endodontic infections, polymerase chain reaction (PCR) is used. Aim The aim of the present study is to identify the specific anaerobic bacteria like Porphyromonas gingivalis, Prevotella intermedia, and Actinomyces naeslundii in the RCs of primary teeth using real-time PCR. Methodology Fifteen subjects aged 3–8 years who had endodontic infections in primary molars were selected. The cases who had been selected did not receive any endodontic treatment and antibiotics within 3 months, and children with systemic diseases were not included. Sample collection Samples were taken by placing absorbent paper points into the largest canals of maxillary and mandibular molars for 60 seconds and are then transferred to a sterile Eppendorf tube with tris-hydochloride EDTA (TE) buffer. The samples were stored at −80°C. All samples were subjected to PCR analysis. Result The specific anaerobes detected in the samples were A. naeslundii (93.3%), Prevotella intermedia (53.3%), and Porphyromonas gingivalis (13.3%). Conclusion The results suggested a high bacterial diversity in the RCs of infected primary teeth. How to cite this article Thimmegowda U, Thomas J, et al. Identification of Specific Anaerobic Bacteria in Endodontic Infections of Primary Teeth—A PCR Study. Int J Clin Pediatr Dent 2019;12(1):1–4.
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Affiliation(s)
- Umapathy Thimmegowda
- Department of Pedodontics and Preventive Dentistry, RajaRajeswari Dental College and Hospital, Bengaluru, Karnataka, India
| | - Joseph Thomas
- Department of Pedodontics and Preventive Dentistry, RajaRajeswari Dental College and Hospital, Bengaluru, Karnataka, India
| | - Shivaprasad Bilichodmath
- Department of Pedodontics and Preventive Dentistry, Krishnadevaraya College of Dental Sciences and Hospital, Bengaluru, Karnataka, India
| | - Naveena Preethi
- Department of Pedodontics and Preventive Dentistry, RajaRajeswari Dental College and Hospital, Bengaluru, Karnataka, India
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de Lima BR, Nicoloso GF, Fatturi-Parolo CC, Ferreira MBC, Montagner F, Casagrande L. Prevotella
strains and lactamic resistance gene distribution in different oral environments of children with pulp necrosis. Int Endod J 2018; 51:1196-1204. [DOI: 10.1111/iej.12948] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 04/30/2018] [Indexed: 11/30/2022]
Affiliation(s)
- B. R. de Lima
- Post-Graduate Program in Dental Clinics; Division of Pediatric Dentistry; Federal University of Rio Grande do Sul - UFRGS; Porto Alegre Brazil
| | - G. F. Nicoloso
- Post-Graduate Program in Dental Clinics; Division of Pediatric Dentistry; Federal University of Rio Grande do Sul - UFRGS; Porto Alegre Brazil
| | - C. C. Fatturi-Parolo
- Division of Cariology; Department of Preventive and Social Dentistry; Federal University of Rio Grande do Sul - UFRGS; Porto Alegre Brazil
| | - M. B. C. Ferreira
- Department of Farmacology; Institute of Basic Health Sciences; Federal University of Rio Grande do Sul - UFRGS; Porto Alegre Brazil
| | - F. Montagner
- Post-Graduate Program in Dental Clinics; Division of Endodontics; Federal University of Rio Grande do Sul - UFRGS; Porto Alegre Brazil
| | - L. Casagrande
- Post-Graduate Program in Dental Clinics; Division of Pediatric Dentistry; Federal University of Rio Grande do Sul - UFRGS; Porto Alegre Brazil
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Willmann C, Mata X, Hanghoej K, Tonasso L, Tisseyre L, Jeziorski C, Cabot E, Chevet P, Crubézy E, Orlando L, Esclassan R, Thèves C. Oral health status in historic population: Macroscopic and metagenomic evidence. PLoS One 2018; 13:e0196482. [PMID: 29768437 PMCID: PMC5955521 DOI: 10.1371/journal.pone.0196482] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 04/13/2018] [Indexed: 12/11/2022] Open
Abstract
Recent developments in High-Throughput DNA sequencing (HTS) technologies and ancient DNA (aDNA) research have opened access to the characterization of the microbial communities within past populations. Most studies have, however, relied on the analysis of dental calculus as one particular material type particularly prone to the molecular preservation of ancient microbial biofilms and potential of entire teeth for microbial characterization, both of healthy communities and pathogens in ancient individuals, remains overlooked. In this study, we used shotgun sequencing to characterize the bacterial composition from historical subjects showing macroscopic evidence of oral pathologies. We first carried out a macroscopic analysis aimed at identifying carious or periodontal diseases in subjects belonging to a French rural population of the 18th century AD. We next examined radiographically six subjects showing specific, characteristic dental pathologies and applied HTS shotgun sequencing to characterize the microbial communities present in and on the dental material. The presence of Streptococcus mutans and also Rothia dentocariosa, Actinomyces viscosus, Porphyromonas gingivalis, Tannerella forsythia, Pseudoramibacter alactolyticus, Olsenella uli and Parvimonas micra was confirmed through the presence of typical signatures of post-mortem DNA damage at an average depth-of-coverage ranging from 0.5 to 7X, with a minimum of 35% (from 35 to 93%) of the positions in the genome covered at least once. Each sampled tooth showed a specific bacterial signature associated with carious or periodontal pathologies. This work demonstrates that from a healthy independent tooth, without visible macroscopic pathology, we can identify a signature of specific pathogens and deduce the oral health status of an individual.
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Affiliation(s)
- Claire Willmann
- Laboratoire d’Anthropologie Moléculaire et d’Imagerie de Synthèse UMR 5288, Université de Toulouse, CNRS, Université Paul Sabatier, Toulouse, France
- Service d’odontologie de l’Hôtel-Dieu, Toulouse, France
| | - Xavier Mata
- Laboratoire d’Anthropologie Moléculaire et d’Imagerie de Synthèse UMR 5288, Université de Toulouse, CNRS, Université Paul Sabatier, Toulouse, France
| | - Kristian Hanghoej
- Laboratoire d’Anthropologie Moléculaire et d’Imagerie de Synthèse UMR 5288, Université de Toulouse, CNRS, Université Paul Sabatier, Toulouse, France
- Centre for GeoGenetics, Natural History Museum of Denmark, Copenhagen, Denmark
| | - Laure Tonasso
- Laboratoire d’Anthropologie Moléculaire et d’Imagerie de Synthèse UMR 5288, Université de Toulouse, CNRS, Université Paul Sabatier, Toulouse, France
| | - Lenka Tisseyre
- Laboratoire d’Anthropologie Moléculaire et d’Imagerie de Synthèse UMR 5288, Université de Toulouse, CNRS, Université Paul Sabatier, Toulouse, France
| | | | - Elodie Cabot
- Institut National de Recherches Archéologiques Préventives, INRAP Grand Ouest, Cesson-Sévigné, France
- Anthropologie Bio-Culturelle, Droit, Ethique et Santé, Faculté de Médecine Site Nord (UMR 7268), Marseille, France
| | - Pierre Chevet
- Institut National de Recherches Archéologiques Préventives, INRAP Grand Ouest, Cesson-Sévigné, France
| | - Eric Crubézy
- Laboratoire d’Anthropologie Moléculaire et d’Imagerie de Synthèse UMR 5288, Université de Toulouse, CNRS, Université Paul Sabatier, Toulouse, France
| | - Ludovic Orlando
- Laboratoire d’Anthropologie Moléculaire et d’Imagerie de Synthèse UMR 5288, Université de Toulouse, CNRS, Université Paul Sabatier, Toulouse, France
- Centre for GeoGenetics, Natural History Museum of Denmark, Copenhagen, Denmark
| | - Rémi Esclassan
- Laboratoire d’Anthropologie Moléculaire et d’Imagerie de Synthèse UMR 5288, Université de Toulouse, CNRS, Université Paul Sabatier, Toulouse, France
- Service d’odontologie de l’Hôtel-Dieu, Toulouse, France
| | - Catherine Thèves
- Laboratoire d’Anthropologie Moléculaire et d’Imagerie de Synthèse UMR 5288, Université de Toulouse, CNRS, Université Paul Sabatier, Toulouse, France
- * E-mail:
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Cytotoxicity and Antimicrobial Effects of a New Fast-Set MTA. BIOMED RESEARCH INTERNATIONAL 2017; 2017:2071247. [PMID: 28303246 PMCID: PMC5337838 DOI: 10.1155/2017/2071247] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 01/02/2017] [Accepted: 01/11/2017] [Indexed: 11/18/2022]
Abstract
Purpose. To compare the biocompatibility and antimicrobial effectiveness of the new Fast-Set MTA (FS-MTA) with ProRoot MTA (RS-MTA). Methods. The agar overlay method with neutral red dye was used. L929 mouse fibroblast cells were cultured. The liquid and oil extracts and solid test material were placed on the agar overlay, four samples for each material. Phenol was used as the positive control and cottonseed oil and MEM extracts were used as negative controls. Cytotoxicity was examined by measuring the zones of decolorization and evaluating cell lysis under an inverted microscope using the established criteria after 24 and 48 hours. The antimicrobial test was performed using the Kirby-Bauer disk-diffusion method against S. mutans, E. faecalis, F. nucleatum, P. gingivalis, and P. intermedia. The size of the zone of inhibition was measured in millimeters. Results. There was no zone of decolorization seen under or around the test materials for FS-MTA and RS-MTA at 24 and 48 hours. The antimicrobial test demonstrated no inhibitory effect of FS-MTA or RS-MTA on any bacterial species after 24 and 48 hours. Conclusions. There was no cytotoxicity or bacterial inhibition observed by the new Fast-Set MTA when compared to the ProRoot MTA after setting.
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Ran S, Liu B, Gu S, Sun Z, Liang J. Analysis of the expression of NLRP3 and AIM2 in periapical lesions with apical periodontitis and microbial analysis outside the apical segment of teeth. Arch Oral Biol 2017; 78:39-47. [PMID: 28193569 DOI: 10.1016/j.archoralbio.2017.02.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 01/31/2017] [Accepted: 02/05/2017] [Indexed: 01/14/2023]
Abstract
OBJECTIVE To detect the distribution and expression levels of the nucleotide-binding oligomerization domain-like receptor protein 3 (NLRP3) and the absent in Melanoma 2 (AIM2) inflammasomes in periapical lesions and to analyse the possible microbial stimuli outside of teeth. DESIGN The distribution of NLRP3 and AIM2 inflammasomes in sixteen periapical lesions was investigated by immunohistochemistry. Meanwhile, the relative gene expression levels of NLRP3 and AIM2 in sixteen periapical lesions and three health periodontal tissue were quantified by real-time polymerase chain reaction (PCR). Moreover, forty-seven teeth without sinus tracts were obtained in the clinic and included in bacterial analysis using PCR. Then, the mRNA levels of apoptosis-associated speck-like protein (ASC), caspase-1, interleukin-1β (IL-1β), NLRP3 and AIM2 in THP-1-derived macrophages treated with lipopolysaccharides (LPS) of Porphyromonas were also quantified by real-time PCR, and the IL-1β secretion level was investigated using enzyme-linked immunosorbent assay (ELISA). RESULTS NLRP3 and AIM2 were positively expressed in periapical lesions and were mainly distributed in inflammatory cells. Most of the samples that demonstrated up-regulation of NLRP3 mRNA also demonstrated up-regulation of caspase-1 mRNA. Microbial analysis revealed that Porphyromonas endodontalis was the most commonly detected species and was detected in 27 of 47 cases (57.4%), followed by Fusobacterium nucleatum (20/47, 42.6%), Porphyromonas gingivalis (19/47, 40.4%), Tannerella forsythia (19/47, 40.4%), Actinomyces sp. (17/47, 36.17%), Treponema denticola (10/47,21.28%), Actinomyces israelii (9/47,19.15%), Prevotella intermedia (6/47, 12.77%), Enterococcus faecalis (1/47,2.13%) and Enterococcus faecium (0/47,0). Furthermore, we found that LPS of P. gingivalis induced THP-1 cells to produce IL-1β and to activate NLRP3 and AIM2 inflammasomes. CONCLUSIONS Our results suggest that the NLRP3 and AIM2 proteins play a part in the pathogenesis of periapical periodontitis. Anaerobes, such as P. endodontalis, P. gingivalis, F. nucleatum and T. forsythia, were the main detected microbial stimuli that might activate inflammasomes in periapical tissues.
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Affiliation(s)
- Shujun Ran
- Department of Endodontics and Operative Dentistry, Shanghai Key Laboratory of Stomatology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, No. 639, Zhizaoju Road, Shanghai, 200011, China
| | - Bin Liu
- Department of Endodontics and Operative Dentistry, Shanghai Key Laboratory of Stomatology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, No. 639, Zhizaoju Road, Shanghai, 200011, China
| | - Shensheng Gu
- Department of Endodontics and Operative Dentistry, Shanghai Key Laboratory of Stomatology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, No. 639, Zhizaoju Road, Shanghai, 200011, China
| | - Zhe Sun
- Department of Endodontics and Operative Dentistry, Shanghai Key Laboratory of Stomatology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, No. 639, Zhizaoju Road, Shanghai, 200011, China.
| | - Jingping Liang
- Department of Endodontics and Operative Dentistry, Shanghai Key Laboratory of Stomatology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, No. 639, Zhizaoju Road, Shanghai, 200011, China.
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Figdor D, Brundin M. Contamination Controls for Analysis of Root Canal Samples by Molecular Methods: An Overlooked and Unsolved Problem. J Endod 2016; 42:1003-8. [PMID: 27236203 DOI: 10.1016/j.joen.2016.04.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 04/18/2016] [Accepted: 04/19/2016] [Indexed: 10/21/2022]
Abstract
INTRODUCTION It has been almost 20 years since molecular methods were first described for the analysis of root canal microbial flora. Contamination control samples are essential to establish DNA decontamination before taking root canal samples, and this review assessed those studies. METHODS Using PubMed, a search was conducted for studies using molecular microbial analysis for the investigation of endodontic samples. Studies were grouped according to the cleaning protocol, acquisition methods, and processing of control samples taken to check for contamination. RESULTS Of 136 studies applying molecular analysis to root canal samples, 21 studies performed surface cleaning and checking nucleotide decontamination with contamination control samples processed by polymerase chain reaction. Only 1 study described disinfection, sampling from the access cavity, and processing by polymerase chain reaction and reported the result; that study reported that all samples contained contaminating bacterial DNA. CONCLUSIONS Cleaning, disinfection, and checking for contamination are basic scientific prerequisites for this type of investigation; yet, this review identifies it as an overlooked issue. On the basis of this review, we call for improved scientific practice in this field.
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Affiliation(s)
- David Figdor
- Department of Microbiology, Monash University, Melbourne, Australia
| | - Malin Brundin
- Department of Odontology/Endodontics, Faculty of Medicine, Umeå University, Umeå, Sweden.
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Chiniforush N, Pourhajibagher M, Shahabi S, Bahador A. Clinical Approach of High Technology Techniques for Control and Elimination of Endodontic Microbiota. J Lasers Med Sci 2015; 6:139-50. [PMID: 26705458 DOI: 10.15171/jlms.2015.09] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The main goal in endodontic treatment is to eradicate or at least reduce intraradicular microbial population to levels that are more compatible with periapical lesions healing process. Since endodontic infections are polymicrobial in nature, intraradicular survival of endodontic microbiota and their pathogenic properties are influenced by a combination of their virulence factors. The purpose of this article is to review the endodontic microbiota and their respective virulence attributes, as well as perform a literature review of the effects of disinfection procedures in the treatment of endodontic infections to gain best practices. Conventional technique for root canal preparation includes mechanical debridement and application of antimicrobial irrigants. Recently, laser irradiation has been used to enhance the results of root canal treatment through its thermal effect. To reduce thermal side effects, laser activated irrigation (LAI) and photon induced photoacoustic streaming (PIPS) were introduced. Antimicrobial photodynamic therapy (aPDT) by photochemical reaction uses light at a specific wavelength to activate a nontoxic photosensitizer (PS) in the presence of oxygen to produce cytotoxic products. Different PSs are used in dentistry including methylene blue (MB), toluidine blue O (TBO), indocyanine green (ICG) and curcumin. Among different options, ICG could be the best choice due to its peak absorption at wavelength of 808 nm, which coincides with the commercial diode laser devices. Also, this wavelength has more penetration depth compared to other wavelengths used in aPDT.
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Affiliation(s)
- Nasim Chiniforush
- Laser Research Center of Dentistry (LRCD), Dental Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Pourhajibagher
- Department of Microbiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Sima Shahabi
- Dental Biomaterials Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Abbas Bahador
- Department of Microbiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Sato Y, Yamagishi J, Yamashita R, Shinozaki N, Ye B, Yamada T, Yamamoto M, Nagasaki M, Tsuboi A. Inter-Individual Differences in the Oral Bacteriome Are Greater than Intra-Day Fluctuations in Individuals. PLoS One 2015; 10:e0131607. [PMID: 26121551 PMCID: PMC4487993 DOI: 10.1371/journal.pone.0131607] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 06/03/2015] [Indexed: 01/15/2023] Open
Abstract
Given the advent of massively parallel DNA sequencing, human microbiome is analyzed comprehensively by metagenomic approaches. However, the inter- and intra-individual variability and stability of the human microbiome remain poorly characterized, particularly at the intra-day level. This issue is of crucial importance for studies examining the effects of microbiome on human health. Here, we focused on bacteriome of oral plaques, for which repeated, time-controlled sampling is feasible. Eighty-one supragingival plaque subjects were collected from healthy individuals, examining multiple sites within the mouth at three time points (forenoon, evening, and night) over the course of 3 days. Bacterial composition was estimated by 16S rRNA sequencing and species-level profiling, resulting in identification of a total of 162 known bacterial species. We found that species compositions and their relative abundances were similar within individuals, and not between sampling time or tooth type. This suggests that species-level oral bacterial composition differs significantly between individuals, although the number of subjects is limited and the intra-individual variation also occurs. The majority of detected bacterial species (98.2%; 159/162), however, did not fluctuate over the course of the day, implying a largely stable oral microbiome on an intra-day time scale. In fact, the stability of this data set enabled us to estimate potential interactions between rare bacteria, with 40 co-occurrences supported by the existing literature. In summary, the present study provides a valuable basis for studies of the human microbiome, with significant implications in terms of biological and clinical outcomes.
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Affiliation(s)
- Yukuto Sato
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, 2–1, Seiryo-machi, Aoba-ku, Sendai, 980–8573, Japan
| | - Junya Yamagishi
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, 2–1, Seiryo-machi, Aoba-ku, Sendai, 980–8573, Japan
- Division of Collaboration and Education, Research Center for Zoonosis Control, Hokkaido University, North 20, West 10 Kita-ku, Sapporo, Hokkaido, 001–0020, Japan
- Global Station for Zoonosis Control, GI-CoRE, Hokkaido University, North 20, West 10 Kita-ku, Sapporo, Hokkaido, 001–0020, Japan
| | - Riu Yamashita
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, 2–1, Seiryo-machi, Aoba-ku, Sendai, 980–8573, Japan
| | - Natsuko Shinozaki
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, 2–1, Seiryo-machi, Aoba-ku, Sendai, 980–8573, Japan
| | - Bin Ye
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, 2–1, Seiryo-machi, Aoba-ku, Sendai, 980–8573, Japan
| | - Takuji Yamada
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, 2–1, Seiryo-machi, Aoba-ku, Sendai, 980–8573, Japan
- Department of Bioinformation, School and Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, 4259 Nagatsutacho, Midoriku, Yokohama, Kanagawa, 226–8501, Japan
| | - Masayuki Yamamoto
- Department of Medical Biochemistry, Tohoku Medical Megabank Organization, Tohoku University, 2–1, Seiryo-machi, Aoba-ku, Sendai, 980–8573, Japan
| | - Masao Nagasaki
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, 2–1, Seiryo-machi, Aoba-ku, Sendai, 980–8573, Japan
- * E-mail: (MN); (AT)
| | - Akito Tsuboi
- Department of Community Medical Supports, Tohoku Medical Megabank Organization, Tohoku University, 2–1, Seiryo-machi, Aoba-ku, Sendai, 980–8573, Japan
- * E-mail: (MN); (AT)
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Aruni AW, Mishra A, Dou Y, Chioma O, Hamilton BN, Fletcher HM. Filifactor alocis--a new emerging periodontal pathogen. Microbes Infect 2015; 17:517-30. [PMID: 25841800 DOI: 10.1016/j.micinf.2015.03.011] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 03/16/2015] [Accepted: 03/23/2015] [Indexed: 02/06/2023]
Abstract
Filifactor alocis, a previously unrecognized Gram-positive anaerobic rod, is now considered a new emerging pathogen that may play a significant role in periodontal disease. F. alocis' unique characteristics and variations at the molecular level that may be responsible for the functional changes required to mediate the pathogenic process are discussed.
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Affiliation(s)
- A Wilson Aruni
- Division of Microbiology and Molecular Genetics, School of Medicine, Loma Linda University, CA 92354, USA
| | - Arunima Mishra
- Division of Microbiology and Molecular Genetics, School of Medicine, Loma Linda University, CA 92354, USA
| | - Yuetan Dou
- Division of Microbiology and Molecular Genetics, School of Medicine, Loma Linda University, CA 92354, USA
| | - Ozioma Chioma
- Division of Microbiology and Molecular Genetics, School of Medicine, Loma Linda University, CA 92354, USA
| | - Brittany N Hamilton
- Division of Microbiology and Molecular Genetics, School of Medicine, Loma Linda University, CA 92354, USA
| | - Hansel M Fletcher
- Division of Microbiology and Molecular Genetics, School of Medicine, Loma Linda University, CA 92354, USA; Institute of Oral Biology, Kyung Hee University, Seoul, Republic of Korea.
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13
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Chalmers NI, Oh K, Hughes CV, Pradhan N, Kanasi E, Ehrlich Y, Dewhirst FE, Tanner ACR. Pulp and plaque microbiotas of children with severe early childhood caries. J Oral Microbiol 2015; 7:25951. [PMID: 25651832 PMCID: PMC4317471 DOI: 10.3402/jom.v7.25951] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 11/11/2014] [Accepted: 11/12/2014] [Indexed: 11/23/2022] Open
Abstract
Background and objective Bacterial invasion into pulps of primary teeth can lead to infection and premature tooth loss in children. This pilot study aimed to explore whether the microbiota of carious exposures of dental pulps resembles that of carious dentin or that of infected root canals. Design Children with severe early childhood caries were studied. Children were consented and extent of caries, plaque, and gingivitis measured. Bacteria were sampled from carious lesion biofilms and vital carious exposures of pulps, and processed by anaerobic culture. Isolates were characterized from partial sequences of the 16S rRNA gene and identified by comparison with taxa in the Human Oral Microbiome Database (http://www.HOMD.org). The microbiotas of carious lesions and dental pulps were compared using univariate and multivariate approaches. Results The microbiota of cariously exposed pulps was similar in composition to that of carious lesion biofilms except that fewer species/taxa were identified from pulps. The major taxa identified belonged to the phyla Firmicutes (mainly streptococci) and Actinobacteria (mainly Actinomyces species). Actinomyces and Selenomonas species were associated with carious lesions whereas Veillonella species, particularly Veillonella dispar was associated with pulps. Other bacteria detected in pulps included Streptococcus mutans, Parascardovia denticolens, Bifidobacterium longum, and several Lactobacillus and Actinomyces species. By principal, component analysis pulp microbiotas grouped together, whereas those in caries biofilms were widely dispersed. Conclusions We conclude that the microbiota of cariously exposed vital primary pulps is composed of a subset of species associated with carious lesions. Vital primary pulps had a dominant Firmicutes and Actinobacteria microbiota which contrasts with reports of endodontic infections which can harbor a gram-negative microbiota. The microbiota of exposed primary pulps may provide insight into bacterial species at the forefront of caries invasion in dentinal lesions that can invade into the pulp and the nature of species that need suppressing for successful pulp therapy.
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Affiliation(s)
- Natalia I Chalmers
- NIDCR, NIH, Bethesda MD, USA.,Department of Microbiology, The Forsyth Institute, Cambridge, MA, USA
| | - Kevin Oh
- School of Dental Medicine, Harvard University, Boston, MA, USA
| | | | | | - Eleni Kanasi
- Department of Microbiology, The Forsyth Institute, Cambridge, MA, USA.,Goldman School of Dental Medicine, Boston University, Boston, MA, USA
| | - Ygal Ehrlich
- School of Dentistry, Indiana University, Indianapolis, IN, USA
| | - Floyd E Dewhirst
- Department of Microbiology, The Forsyth Institute, Cambridge, MA, USA.,School of Dental Medicine, Harvard University, Boston, MA, USA
| | - Anne C R Tanner
- Department of Microbiology, The Forsyth Institute, Cambridge, MA, USA.,School of Dental Medicine, Harvard University, Boston, MA, USA;
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