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Ordinola-Zapata R, Costalonga M, Dietz M, Lima BP, Staley C. The root canal microbiome diversity and function. A whole-metagenome shotgun analysis. Int Endod J 2024; 57:872-884. [PMID: 36861850 DOI: 10.1111/iej.13911] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/23/2023] [Accepted: 02/25/2023] [Indexed: 03/03/2023]
Abstract
AIM To evaluate the root canal microbiome composition and bacterial functional capability in cases of primary and secondary apical periodontitis utilizing whole-metagenome shotgun sequencing. METHODOLOGY Twenty-two samples from patients with primary root canal infections, and 18 samples obtained from previously treated teeth currently diagnosed with apical periodontitis were analysed with whole-metagenome shotgun sequencing at a depth of 20 M reads. Taxonomic and functional gene annotations were made using MetaPhlAn3 and HUMAnN3 software. The Shannon and Chao1 indices were utilized to measure alpha diversity. Differences in community composition were evaluated utilizing analysis of similarity (ANOSIM) using Bray-Curtis dissimilarities. The Wilcoxon rank sum test was used to compare differences in taxa and functional genes. RESULTS Microbial community variations within a community were significantly lower in secondary relative to primary infections (alpha diversity p = .001). Community composition was significantly different in primary versus secondary infection (R = .11, p = .005). The predominant taxa observed among samples (>2.5%) were Pseudopropionibacterium propionicum, Prevotella oris, Eubacterium infirmum, Tannerella forsythia, Atopobium rimae, Peptostreptococcus stomatis, Bacteroidetes bacterium oral taxon 272, Parvimonas micra, Olsenella profusa, Streptococcus anginosus, Lactobacillus rhamnosus, Porphyromonas endodontalis, Pseudoramibacter alactolyticus, Fusobacterium nucleatum, Eubacterium brachy and Solobacterium moorei. The Wilcoxon rank test revealed no significant differences in relative abundances of functional genes in both groups. Genes with greater relative abundances (top 25) were associated with genetic, signalling and cellular processes including the iron and peptide/nickel transport system. Numerous genes encoding toxins were identified: exfoliative toxin, haemolysins, thiol-activated cytolysin, phospholipase C, cAMP factor, sialidase, and hyaluronic glucosaminidase. CONCLUSIONS Despite taxonomic differences between primary and secondary apical periodontitis, the functional capability of the microbiomes was similar.
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Affiliation(s)
- Ronald Ordinola-Zapata
- Division of Endodontics, Department of Restorative Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Massimo Costalonga
- Division of Basic Sciences, Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Matthew Dietz
- Division of Basic & Translational Research, Department of Surgery, University of Minnesota, Minneapolis, Minnesota, USA
| | - Bruno P Lima
- Division of Basic Sciences, Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Christopher Staley
- Division of Basic & Translational Research, Department of Surgery, University of Minnesota, Minneapolis, Minnesota, USA
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Xiao S, Sun G, Huang S, Lin C, Li Y. Nanoarchitectonics-Based Materials as a Promising Strategy in the Treatment of Endodontic Infections. Pharmaceutics 2024; 16:759. [PMID: 38931881 PMCID: PMC11207628 DOI: 10.3390/pharmaceutics16060759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2024] [Revised: 05/19/2024] [Accepted: 05/29/2024] [Indexed: 06/28/2024] Open
Abstract
Endodontic infections arise from the interactive activities of microbial communities colonizing in the intricate root canal system. The present study aims to update the latest knowledge of nanomaterials, their antimicrobial mechanisms, and their applications in endodontics. A detailed literature review of the current knowledge of nanomaterials used in endodontic applications was performed using the PubMed database. Antimicrobial nanomaterials with a small size, large specific surface area, and high chemical activity are introduced to act as irrigants, photosensitizer delivery systems, and medicaments, or to modify sealers. The application of nanomaterials in the endodontic field could enhance antimicrobial efficiency, increase dentin tubule penetration, and improve treatment outcomes. This study supports the potential of nanomaterials as a promising strategy in treating endodontic infections.
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Affiliation(s)
- Suli Xiao
- Department of Endodontics, Stomatological Hospital of Xiamen Medical College, Xiamen 361003, China;
- Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Xiamen 361003, China
| | - Guanwen Sun
- Department of Stomatology, Fujian Medical University Xiamen Humanity Hospital, Xiamen 361018, China;
| | - Shan Huang
- Department of Stomatology, Zhongshan Hospital Affiliated to Xiamen University, Xiamen 361005, China;
| | - Chen Lin
- Department of Endodontics, Stomatological Hospital of Xiamen Medical College, Xiamen 361003, China;
- Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Xiamen 361003, China
| | - Yijun Li
- Department of Endodontics, Stomatological Hospital of Xiamen Medical College, Xiamen 361003, China;
- Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Xiamen 361003, China
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3
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Beecroft EV, Edwards D, Allison JR. Other Secondary Headaches: Odontogenic Pain and Other Painful Orofacial Conditions. Neurol Clin 2024; 42:615-632. [PMID: 38575270 DOI: 10.1016/j.ncl.2023.12.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
This article discusses extremely common odontogenic pain conditions, which may occasionally present to the neurology clinic mimicking headache, and other uncommon orofacial pain conditions, which may do the same. Typical presentations, investigative strategies, and management are discussed, as well as highlighting key diagnostic criteria and the importance of involving oral or dental specialists where diagnostic uncertainty exists.
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Affiliation(s)
- Emma V Beecroft
- School of Dental Sciences, Faculty of Medical Sciences, Newcastle University, Newcastle Upon Tyne, United Kingdom; Newcastle Upon Tyne Hospitals NHS Foundation Trust, Newcastle Upon Tyne, United Kingdom.
| | - David Edwards
- School of Dental Sciences, Faculty of Medical Sciences, Newcastle University, Newcastle Upon Tyne, United Kingdom; Newcastle Upon Tyne Hospitals NHS Foundation Trust, Newcastle Upon Tyne, United Kingdom
| | - James R Allison
- School of Dental Sciences, Faculty of Medical Sciences, Newcastle University, Newcastle Upon Tyne, United Kingdom; Newcastle Upon Tyne Hospitals NHS Foundation Trust, Newcastle Upon Tyne, United Kingdom
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Wang G, Yuan F, Ying W, Xu J. The effects of different regenerative technologies and materials on wound healing after surgical endodontic therapy: A meta-analysis. Int Wound J 2023; 20:4340-4348. [PMID: 37437962 PMCID: PMC10681480 DOI: 10.1111/iwj.14293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 06/08/2023] [Accepted: 06/16/2023] [Indexed: 07/14/2023] Open
Abstract
A meta-analysis was performed to assess the effects of different regenerative technologies and materials on wound healing after surgical endodontic therapy and provide a reference for surgical endodontic treatment. We searched for studies on the use of regenerative technologies and materials in surgical endodontic therapy via PubMed, MEDLINE, EMBASE, Web of Science, China National Knowledge Infrastructure (CNKI), and Wanfang Data from the time of database creation to December 2022. Two researchers independently screened the literature, extracted information based on the inclusion and exclusion criteria, and evaluated the quality of the included studies. A meta-analysis was performed using Review Manager 5.4. The results showed that the use of regenerative technologies and materials significantly reduced wound healing failures (risk ratio [RR]: 0.30, 95% confidence intervals [CI]: 0.22-0.40, p < 0.001). Moreover, autologous platelet concentrations (APCs) (RR: 0.28, 95% CI: 0.15-0.53, p < 0.001) and collagen membrane plus bovine-derived hydroxyapatite (RR: 0.27, 95% CI. 0.12-0.61, p = 0.002) were more effective in improving wound healing failure rates than collagen membrane alone (RR: 0.51, 95% CI: 0.20-1.25, p = 0.140). Our findings showed that APCs, as well as collagen membrane plus bovine-derived hydroxyapatite, significantly improved wound healing after surgical endodontic therapy. In contrast, collagen membrane alone did not significantly improve wound healing outcomes. However, currently available studies vary significantly in sample size and methodologies. Hence, high-quality randomised controlled studies with large sample sizes are necessary to validate our findings.
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Affiliation(s)
- Ge Wang
- Department of EndodonticsJinan Stomatological HospitalJinanChina
| | - Fang Yuan
- Department of ProsthodonticsJinan Stomatological HospitalJinanChina
| | - Wanggui Ying
- Shungeng BranchJinan Stomatological HospitalJinanChina
| | - Jie Xu
- Oral Implantology Center of Jinan Stomatological HospitalJinanChina
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Dyrhovden R, Eagan TM, Fløtten Ø, Siljan W, Leegaard TM, Bø B, Fardal H, Grøvan F, Kildahl-Andersen A, Larssen KW, Tilseth R, Hjetland R, Løes S, Lindemark F, Tellevik M, Breistein R, Kommedal Ø. Pleural Empyema Caused by Streptococcus intermedius and Fusobacterium nucleatum: A Distinct Entity of Pleural Infections. Clin Infect Dis 2023; 77:1361-1371. [PMID: 37348872 PMCID: PMC10654859 DOI: 10.1093/cid/ciad378] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 06/20/2023] [Indexed: 06/24/2023] Open
Abstract
BACKGROUND Many community-acquired pleural infections are caused by facultative and anaerobic bacteria from the human oral microbiota. The epidemiology, clinical characteristics, pathogenesis, and etiology of such infections are little studied. The aim of the present prospective multicenter cohort study was to provide a thorough microbiological and clinical characterization of such oral-type pleural infections and to improve our understanding of the underlying etiology and associated risk factors. METHODS Over a 2-year period, we included 77 patients with community-acquired pleural infection, whereof 63 (82%) represented oral-type pleural infections. Clinical and anamnestic data were systematically collected, and patients were offered a dental assessment by an oral surgeon. Microbial characterizations were done using next-generation sequencing. Obtained bacterial profiles were compared with microbiology data from previous investigations on odontogenic infections, bacteremia after extraction of infected teeth, and community-acquired brain abscesses. RESULTS From the oral-type pleural infections, we made 267 bacterial identifications representing 89 different species. Streptococcus intermedius and/or Fusobacterium nucleatum were identified as a dominant component in all infections. We found a high prevalence of dental infections among patients with oral-type pleural infection and demonstrate substantial similarities between the microbiology of such pleural infections and that of odontogenic infections, odontogenic bacteremia, and community-acquired brain abscesses. CONCLUSIONS Oral-type pleural infection is the most common type of community-acquired pleural infection. Current evidence supports hematogenous seeding of bacteria from a dental focus as the most important underlying etiology. Streptococcus intermedius and Fusobacterium nucleatum most likely represent key pathogens necessary for establishing the infection.
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Affiliation(s)
- Ruben Dyrhovden
- Department of Microbiology, Haukeland University Hospital, Bergen, Norway
| | - Tomas Mikal Eagan
- Department of Clinical Science, University of Bergen, Bergen, Norway
- Department of Thoracic Medicine, Haukeland University Hospital, Bergen, Norway
| | - Øystein Fløtten
- Department of Clinical Science, University of Bergen, Bergen, Norway
- Department of Thoracic Medicine, Haukeland University Hospital, Bergen, Norway
| | - William Siljan
- Department of Pulmonary Medicine, Akershus University Hospital, Lørenskog, Norway
| | - Truls Michael Leegaard
- Division of Medicine and Laboratory Sciences, Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Microbiology and Infection Control, Akershus University Hospital, Akershus, Norway
| | - Bjørnar Bø
- Department of Pulmonary Medicine, Stavanger University Hospital, Stavanger, Norway
| | - Hilde Fardal
- Department of Microbiology, Stavanger University Hospital, Stavanger, Norway
| | - Fredrik Grøvan
- Department of Medicine, Haraldsplass Deaconess Hospital, Bergen, Norway
| | - Arne Kildahl-Andersen
- Department of Thoracic Medicine, St Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Kjersti Wik Larssen
- Department of Medical Microbiology, St Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Rune Tilseth
- Department of Medicine, Førde Central Hospital, Førde, Norway
| | - Reidar Hjetland
- Department of Microbiology, Førde Central Hospital, Førde, Norway
| | - Sigbjørn Løes
- Department of Maxillofacial Surgery, Haukeland University Hospital, Bergen, Norway
- Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
| | - Frode Lindemark
- Department of Thoracic Medicine, Haukeland University Hospital, Bergen, Norway
| | - Marit Tellevik
- Department of Microbiology, Haukeland University Hospital, Bergen, Norway
| | - Rebecca Breistein
- Department of Microbiology, Haukeland University Hospital, Bergen, Norway
| | - Øyvind Kommedal
- Department of Microbiology, Haukeland University Hospital, Bergen, Norway
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Bapat RA, Libat R, Yuin OS, Parolia A, Ilyas MS, Khan AS, Kay MK, Pichika MR, Saxena K, Seow LL, Sidhu P, Daood U. Antimicrobial FiteBac® K21 promotes antimicrobial Potency and wound healing. Heliyon 2023; 9:e19282. [PMID: 37664740 PMCID: PMC10469996 DOI: 10.1016/j.heliyon.2023.e19282] [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: 10/03/2022] [Revised: 07/27/2023] [Accepted: 08/17/2023] [Indexed: 09/05/2023] Open
Abstract
Objectives Successful root canal therapy is dependent on the efficacy of complete instrumentation and adequate use of chemical irrigant to eliminate the biofilm from dentin surface. The aim of the study was to examine antibiofilm and antimicrobial effectiveness of newly formulated Quaternary ammonium silane (QAS/also codenamed K21; against Fusobacterium nucleatum (F. nucleatum) and Enterococcus faecalis (E. faecalis) biofilm on radicular dentin with evaluation of the anti-inflammatory consequence in vivo. Methods Fourier Transform Infrared Spectroscopy (FTIR) was performed after complete hydrolysis of K21 solution. Human teeth were inoculated with biofilms for 7-days followed by treatment with various irrigants. The irrigant groups were Sodium hypochlorite [NaOCl (6%)], Chlorhexidine [CHX (2%)], K21 (0.5%), K21 (1%) and Saline. Scanning electron microscopy (SEM) was performed for biofilm and resin-dentin penetration. Transmission Electron Microscopy (TEM) of biofilms was done to evaluate application of K21. For in vivo evaluation, Albino wistar rats were injected subcutaneously and sections were stained with haematoxylin/eosin. Macrophage, M1/M2 expression were evaluated along with molecular simulation. Raman measurements were done on dried biofilms. Results FTIR K21 specimens demonstrated presence of ethanol/silanol groups. Raman band at 1359 cm-1 resemble to -CH2- wagging displaying 29Si atoms in Nuclear Magnetic Resonance (NMR). 0.5%K21 showed cells exhibiting folded membranes. SEM showed staggering amount of resin tags with 0.5% K21 group. TEM showed membrane disruption in K21-groups. K21 groups were initially irritant, which subsided completely afterwards showing increased CD68. K21 and MMP/collagen complex was thermodynamically favourable. Conclusion K21 root canal irrigant was able to penetrate bacterial wall and can serve as a potential irrigant for therapeutic benefits. Expression of M2 polarized subsets showed K21 can serve in resolving inflammation and potentiate tissue repair.
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Affiliation(s)
- Ranjeet Ajit Bapat
- Restorative Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000, Wilayah Persekutuan Kuala Lumpur, Malaysia
| | - Rikan Libat
- Restorative Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000, Wilayah Persekutuan Kuala Lumpur, Malaysia
| | - Ong Shu Yuin
- Restorative Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000, Wilayah Persekutuan Kuala Lumpur, Malaysia
| | - Abhishek Parolia
- Restorative Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000, Wilayah Persekutuan Kuala Lumpur, Malaysia
| | | | - Abdul Samad Khan
- Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University; Dammam, Saudi Arabia
| | - Mak Kit Kay
- Pharmaceutical Chemistry, School of Pharmacy, International Medical University, Kuala Lumpur, Malaysia
| | - Mallikarjuna Rao Pichika
- Pharmaceutical Chemistry, School of Pharmacy, International Medical University, Kuala Lumpur, Malaysia
| | - Kirti Saxena
- Clinical Oral Health Sciences Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000, Wilayah Persekutuan Kuala Lumpur, Malaysia
| | - Liang Lin Seow
- Restorative Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000, Wilayah Persekutuan Kuala Lumpur, Malaysia
| | - Preena Sidhu
- Restorative Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000, Wilayah Persekutuan Kuala Lumpur, Malaysia
| | - Umer Daood
- Restorative Division, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000, Wilayah Persekutuan Kuala Lumpur, Malaysia
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7
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Ordinola-Zapata R, Costalonga M, Nixdorf D, Dietz M, Schuweiler D, Lima BP, Staley C. Taxonomic abundance in primary and secondary root canal infections. Int Endod J 2023; 56:278-288. [PMID: 36334085 PMCID: PMC10100057 DOI: 10.1111/iej.13864] [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: 06/13/2022] [Revised: 10/25/2022] [Accepted: 10/31/2022] [Indexed: 11/06/2022]
Abstract
AIM To evaluate the root canal microbiome composition in cases of primary and secondary apical periodontitis. METHODOLOGY Thirty-nine samples from patients with primary root canal infections obtained before root canal treatment, and 40 samples obtained during root-end resection procedures from previously filled cases with apical periodontitis were evaluated using 16S rRNA next-generation sequencing analysis (NGS). Demographic and clinical factors included age, sex, infection type, percussion sensitivity, and presence of pain. Differences in abundances of genera were evaluated using Kruskal-Wallis test. Alpha and beta diversity indices were calculated using mothur. The Shannon and Chao1 indices were used to measure alpha diversity. The Bray-Curtis dissimilarity was used to measure beta diversity. Differences in community composition were evaluated using analysis of similarity (ANOSIM) with Bonferroni correction for multiple comparisons. RESULTS Significantly fewer operational taxonomic units values were observed from samples from secondary infections (p < .0001). While no significant differences were observed in the Chao 1 index between primary and secondary infections, the Shannon alpha diversity was significantly lower in secondary relative to primary infections (p = .008). Among samples, sex, age (adult vs. older adult), percussion sensitivity, and presence of pain all showed no significant effects on community composition via an analysis of similarity (ANOSIM). However, community composition was significantly different depending on whether the sample was from a primary or secondary infection (R = .051, p = .03). Nine microbial genera comprised the predominant taxa observed among samples (>3.3%) and included Parvimonas, Fusobacterium, Campylobacter, Arachnia, Eubacterium, Prevotella, Peptostreptococcus, Fretibacterirum, and Pseudoramibacter. Significantly greater relative abundances of Prevotella, Peptostreptococcus, Veillonella, Lactucaseibacillus, and Dialister were observed in primary infections. CONCLUSIONS Primary endodontic infections are more diverse than secondary infections. The microbial composition is not associated with the clinical manifestations of apical periodontitis.
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Affiliation(s)
- Ronald Ordinola-Zapata
- Division of Endodontics, Department of Restorative Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Massimo Costalonga
- Division of Basic Sciences, Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Donald Nixdorf
- Division of TMJ and Orofacial Pain, Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Matthew Dietz
- Division of Basic & Translational Research, Department of Surgery, University of Minnesota, Minneapolis, Minnesota, USA
| | - David Schuweiler
- Division of Endodontics, Department of Restorative Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Bruno P Lima
- Division of Basic Sciences, Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, Minnesota, USA
| | - Christopher Staley
- Division of Basic & Translational Research, Department of Surgery, University of Minnesota, Minneapolis, Minnesota, USA
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Mao S, Huang CP, Lan H, Lau HG, Chiang CP, Chen YW. Association of periodontitis and oral microbiomes with Alzheimer’s disease: A narrative systematic review. J Dent Sci 2022; 17:1762-1779. [PMID: 36299333 PMCID: PMC9588805 DOI: 10.1016/j.jds.2022.07.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 07/02/2022] [Indexed: 11/26/2022] Open
Abstract
Background/purpose Alzheimer’s disease (AD) is a neurodegenerative disorder and the most common form of dementia. The etiology for AD includes age, genetic susceptibility, neuropathology, and infection. Periodontitis is an infectious and inflammatory disease which mainly causes alveolar bone destruction and tooth loss. The evidence of a link between AD and periodontitis remains controversial. Thus far, studies reviewing the association between AD and periodontal disease have been insufficient from the viewpoint of the oral microbiome. The aim of this review was to focus on studies that have explored the relationship between the oral microbiome and AD development by using the next-generation sequencing technique. Materials and methods A comprehensive electronic search of MEDLINE via PubMed, EMBASE, Scopus, and Google Scholar was conducted. The keywords included dementia, Alzheimer’s disease, cognitive impairment, periodontitis, periodontal disease, and oral microbiome. Results This review included 26 articles based on the eligibility criteria. Epidemiologic researches and post-mortem studies showed that the presence of periodontitis is associated with cognitive decline, suggesting a possible role of periodontal pathogens in the pathogenesis of AD. The reported microbiome was inconsistent with those in gene sequencing studies. Nevertheless, Gram-negative species may be possible candidates. Conclusion This review suggests that periodontal infection is associated with AD. The contributing microbiome remains unconfirmed, possibly because of different microbiome sampling sites or methods. Additional large-scale studies with periodontal intervention and longitudinal follow-up are warranted to clarify the relationship between periodontal disease and AD.
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Könönen E, Fteita D, Gursoy UK, Gursoy M. Prevotella species as oral residents and infectious agents with potential impact on systemic conditions. J Oral Microbiol 2022; 14:2079814. [DOI: 10.1080/20002297.2022.2079814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- Eija Könönen
- Institute of Dentistry, University of Turku, Turku, Finland
| | - Dareen Fteita
- Institute of Dentistry, University of Turku, Turku, Finland
| | - Ulvi K. Gursoy
- Institute of Dentistry, University of Turku, Turku, Finland
| | - Mervi Gursoy
- Institute of Dentistry, University of Turku, Turku, Finland
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Influence of Guided Tissue Regeneration Techniques on the Success Rate of Healing of Surgical Endodontic Treatment: A Systematic Review and Network Meta-Analysis. J Clin Med 2022; 11:jcm11041062. [PMID: 35207335 PMCID: PMC8880114 DOI: 10.3390/jcm11041062] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/14/2022] [Accepted: 02/15/2022] [Indexed: 11/18/2022] Open
Abstract
Several regeneration techniques and materials have been proposed for the healing of bone defects after surgical endodontic treatment; however, the existing literature does not provide evidence on the most recommended techniques or materials. The aim of the present systematic review and network meta-analysis (NMA) is to summarize the clinical evidence on the efficacy of guided tissue regeneration techniques (GRTs). The PRISMA recommendations were followed. Four databases were searched up to December 2021. Randomized clinical trials (RCTs) with a minimum follow-up of 6 months were included. The risk of bias was assessed using the Cochrane Collaboration tool. A fixed effects model and frequentist approach were used in the NMA. Direct GRT technique comparisons were combined to estimate indirect comparisons, and the estimated effect size of the comparisons was analyzed using the odds ratio (OR). Inconsistency was assessed with the Q test, with a significance level of p < 0.01, and a net heat plot. A total of 274 articles was identified, and 11 RCTs (6 direct comparisons of 15 techniques) were included in the NMA, which examined 6 GRT techniques: control, Os, PL, MB, MB + Os, and MB + PL. The MB + Os group compared to the control (OR = 3.67, 95% CI: 1.36–9.90) and to the MB group (OR = 3.47, 95% CI: 1.07–11.3) showed statistically significant ORs (p ˂ 0.05). The MB + Os group presented the highest degree of certainly (P-score = 0.93).
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11
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Genetic Homology between Bacteria Isolated from Pulmonary Abscesses or Pyothorax and Bacteria from the Oral Cavity. Microbiol Spectr 2022; 10:e0097421. [PMID: 35171020 PMCID: PMC8849061 DOI: 10.1128/spectrum.00974-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Pulmonary abscesses and pyothorax are bacterial infections believed to be caused primarily by oral microbes. However, past reports addressing such infections have not provided genetic evidence and lack accuracy, as they used samples that had passed through the oral cavity. The aim of this study was to determine whether genetically identical bacterial strains exist in both the oral microbiota and pus specimens that were obtained percutaneously from pulmonary abscesses and pyothorax, without oral contamination. First, bacteria isolated from pus were identified by 16S rRNA gene sequencing. It was then determined by quantitative PCR using bacterial-species-specific primers that DNA extracted from paired patient oral swab sample suspensions contained the same species. This demonstrated sufficient levels of bacterial DNA of the targeted species to use for further analysis in 8 of 31 strains. Therefore, the whole-genome sequences of these eight strains were subsequently determined and compared against an open database of the same species. Five strain-specific primers were synthesized for each of the eight strains. DNA extracted from the paired oral swab sample suspensions of the corresponding patients was PCR amplified using five strain-specific primers. The results provided strong evidence that certain pus-derived bacterial strains were of oral origin. Furthermore, this two-step identification process provides a novel method that will contribute to the study of certain pathogens of the microbiota. IMPORTANCE We present direct genetic evidence that some of the bacteria in pulmonary abscesses and pyothorax are derived from the oral flora. This is the first report describing the presence of genetically homologous strains both in pus from pulmonary abscesses and pyothorax and in swab samples from the mouth. We developed a new method incorporating quantitative PCR and next-generation sequencing and successfully prevented contamination of pus specimens with oral bacteria by percutaneous sample collection. The new genetic method would be useful for enabling investigations on other miscellaneous flora; for example, detection of pathogens from the intestinal flora at the strain level.
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Siqueira JF, Rôças IN. Present status and future directions - microbiology of endodontic infections. Int Endod J 2021; 55 Suppl 3:512-530. [PMID: 34958494 DOI: 10.1111/iej.13677] [Citation(s) in RCA: 85] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 12/22/2021] [Accepted: 12/26/2021] [Indexed: 11/29/2022]
Abstract
Apical periodontitis has a microbial aetiology and is one of the most common inflammatory diseases that affect humans. Fungi, archaea and viruses have been found in association with apical periodontitis, but bacteria are by far the most prevalent and dominant microorganisms in endodontic infections. Bacterial infection of the root canal system only occurs when the pulp is necrotic or was removed for previous treatment. In some specific cases, including acute and chronic abscesses, the bacterial infection may reach the periradicular tissues. Intracanal bacteria are usually observed as sessile multispecies communities (biofilms) attached to the dentinal root canal walls. Infection in the main root canal lumen can spread to other areas of the root canal system. Although more than 500 bacterial species have been detected in endodontic infections, a selected group of 20 to 30 species are most frequently detected and may be considered as the core microbiome. There is a high interindividual variability in the endodontic microbiome in terms of species composition and relative abundance. Obligate anaerobic species are more abundant in the intraradicular bacterial communities of teeth with primary apical periodontitis, while both anaerobes and facultatives dominate the communities in post-treatment apical periodontitis. Bacterial interactions play an essential role in determining the overall virulence of the community, which has been regarded as the unit of pathogenicity of apical periodontitis. This article reviews the microbiologic aspects of endodontic infections and provides perspectives for future research and directions in the field.
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Affiliation(s)
- José F Siqueira
- Department of Dental Research, Faculty of Dentistry, Iguaçu University (UNIG), Nova Iguaçu, RJ, and Department of Endodontics and Molecular Microbiology Laboratory, Faculty of Dentistry, Grande Rio University, Rio de Janeiro, RJ, Brazil
| | - Isabela N Rôças
- Department of Dental Research, Faculty of Dentistry, Iguaçu University (UNIG), Nova Iguaçu, RJ, and Department of Endodontics and Molecular Microbiology Laboratory, Faculty of Dentistry, Grande Rio University, Rio de Janeiro, RJ, Brazil
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Siqueira JF, Rôças IN. A critical analysis of research methods and experimental models to study the root canal microbiome. Int Endod J 2021; 55 Suppl 1:46-71. [PMID: 34714548 DOI: 10.1111/iej.13656] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 10/22/2021] [Accepted: 10/27/2021] [Indexed: 12/15/2022]
Abstract
Endodontic microbiology deals with the study of the microbial aetiology and pathogenesis of pulpal and periradicular inflammatory diseases. Research in endodontic microbiology started almost 130 years ago and since then has mostly focussed on establishing and confirming the infectious aetiology of apical periodontitis, identifying the microbial species associated with the different types of endodontic infections and determining the efficacy of treatment procedures in eradicating or controlling infection. Diverse analytical methods have been used over the years, each one with their own advantages and limitations. In this review, the main features and applications of the most used technologies are discussed, and advice is provided to improve study designs in order to properly address the scientific questions and avoid setbacks that can compromise the results. Finally, areas of future research are described.
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Affiliation(s)
- José F Siqueira
- Department of Endodontics and Molecular Microbiology Laboratory, Faculty of Dentistry, Grande Rio University, Rio de Janeiro, Brazil.,Department of Dental Research, Faculty of Dentistry, Iguaçu University (UNIG), Nova Iguaçu, Brazil
| | - Isabela N Rôças
- Department of Endodontics and Molecular Microbiology Laboratory, Faculty of Dentistry, Grande Rio University, Rio de Janeiro, Brazil.,Department of Dental Research, Faculty of Dentistry, Iguaçu University (UNIG), Nova Iguaçu, Brazil
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Altaie AM, Saddik B, Alsaegh MA, Soliman SSM, Hamoudi R, Samaranayake LP. Prevalence of unculturable bacteria in the periapical abscess: A systematic review and meta-analysis. PLoS One 2021; 16:e0255485. [PMID: 34351963 PMCID: PMC8341601 DOI: 10.1371/journal.pone.0255485] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 07/18/2021] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE To assess the prevalence of unculturable bacteria in periapical abscess, radicular cyst, and periapical granuloma. METHODS PubMed, Scopus, Science Direct, and Ovid databases were systematically searched from January 1990 to May 2020. All the included studies were cross-sectional design. The risk of bias was assessed using Joanna Briggs Institute check-list. Heterogeneity was described using meta-regression and mixed-effects model for lesion, country, and sequence technique moderators. Funnel plot and unweighted Egger's regression test were used to estimate the publication bias. Microbiome data on diversity, abundance, and frequency of unculturable bacteria in the periapical lesions were reviewed, analysed, and the principal component analysis (PCA) was performed. RESULTS A total of 13 studies out of 14,780, were selected for the final analysis. These studies focused on the prevalence of unculturable bacteria in periapical abscesses and related lesions. Approximately 13% (95% CI: 7-23%) of the cumulative number of bacteria derived from periapical abscesses was unculturable. Country moderator significantly (P = 0.05) affects the diversity summary proportion. While the pooled frequency of unculturable bacteria was 8%; 95% CI: 5, 14%, the estimate of the pooled abundance of unculturable bacteria was 5%; 95% CI: 2, 12% with a significant (P = 0.05) country moderator that affects the abundance summary proportion. Of the 62 unculturable bacteria, 35 were subjected to PCA and Peptostreptococcus sp. oral clone CK035 was the most abundant species in periapical abscesses. Hybridization techniques were found to be the most reliable molecular methods in detecting the abundance and frequency of unculturable bacteria. CONCLUSION The significant prevalence of unculturable bacteria in the periapical abscess, suggests that they are likely to play, a yet unknown, critical role in the pathogenesis and progression of the disease. Further research remains to be done to confirm their specific contributions in the virulence and disease progression.
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Affiliation(s)
- Alaa Muayad Altaie
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah, UAE
- Department of Oral and Craniofacial Health Sciences, College of Dental Medicine, University of Sharjah, Sharjah, UAE
| | - Basema Saddik
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah, UAE
- Department of Family and Community Medicine, College of Medicine, University of Sharjah, Sharjah, UAE
| | - Mohammed Amjed Alsaegh
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah, UAE
- Department of Oral and Craniofacial Health Sciences, College of Dental Medicine, University of Sharjah, Sharjah, UAE
| | - Sameh S. M. Soliman
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah, UAE
- Department of Medicinal Chemistry, College of Pharmacy, University of Sharjah, Sharjah, UAE
| | - Rifat Hamoudi
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah, UAE
- Department of Clinical Sciences, College of Medicine, University of Sharjah, Sharjah, UAE
- Division of Surgery and Interventional Science, University College London, London, United Kingdom
- * E-mail: (RH); (LPS)
| | - Lakshman P. Samaranayake
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah, UAE
- Department of Oral and Craniofacial Health Sciences, College of Dental Medicine, University of Sharjah, Sharjah, UAE
- * E-mail: (RH); (LPS)
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Randall D, Jee Y, Vanood A, Mayo D. Atypical Presentation of Periprosthetic Joint Infection After Total Knee Arthroplasty due to Parvimonas micra. Arthroplast Today 2020; 6:901-905. [PMID: 33204785 PMCID: PMC7649107 DOI: 10.1016/j.artd.2020.09.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 09/25/2020] [Accepted: 09/30/2020] [Indexed: 11/18/2022] Open
Abstract
There is limited literature reporting the oral pathogen Parvimonas micra as the causative organism of periprosthetic joint infection. Previous reports demonstrate septic arthritis in native or prosthetic joints due to P. micra in elderly or immunocompromised patients associated with tooth abscess and periodontal disease. Our case report is unique because it describes a healthy individual with recurrent gingivitis developing periprosthetic joint infection after total knee arthroplasty as the result of isolated P. micra. Her clinical symptom presented early and manifested as progressive stiffness only. Timely aspiration resulted in early diagnosis, but the patient still underwent 2-stage revision with a more constrained implant. To prevent the risk of infection by oral pathogens such as P. micra, dental history should be thoroughly investigated, and any lingering periodontal infection should be addressed before any arthroplasty operation.
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Affiliation(s)
- Dustin Randall
- Oakland University William Beaumont School of Medicine, Auburn Hills, MI, USA
| | - Young Jee
- Department of Orthopaedic Surgery, Beaumont Health, Royal Oak, MI, USA
| | - Aimen Vanood
- Oakland University William Beaumont School of Medicine, Auburn Hills, MI, USA
| | - David Mayo
- Department of Orthopaedic Surgery, Beaumont Health, Royal Oak, MI, USA
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Nardello LC, Vilela BG, Fernandes FS, Bruno FP, Carvalho AP, Cazares RX, Nascimento LC, Honório HM, Ando ES, Mayer MP, Gavini G, Pinheiro ET. Analysis of Active Bacteria Persisting after Chemomechanical Procedures: An RNA- and DNA-based Molecular Study. J Endod 2020; 46:1570-1576. [DOI: 10.1016/j.joen.2020.08.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 07/31/2020] [Accepted: 08/07/2020] [Indexed: 12/26/2022]
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17
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Daood U, Parolia A, Matinlinna J, Yiu C, Ahmed HMA, Fawzy A. Properties of a modified quaternary ammonium silane formulation as a potential root canal irrigant in endodontics. Dent Mater 2020; 36:e386-e402. [PMID: 33010944 DOI: 10.1016/j.dental.2020.09.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/28/2020] [Accepted: 09/09/2020] [Indexed: 12/20/2022]
Abstract
OBJECTIVES Evaluate a new modified quaternary ammonium silane irrigant solution for its antimicrobial, cytotoxic and mechanical properties of dentine substrate. METHODS Root canal preparation was performed using stainless steel K-files™ and F4 size protaper with irrigation protocols of 6% NaOCl + 2% CHX; 3.5% QIS; 2% QIS and sterile saline. Biofilms were prepared using E. faecalis adjusted and allowed to grow for 3 days, treated with irrigants, and allowed to grow for 7 days. AFM was performed and surface free energy calculated. MC3T3 cells were infected with endo irrigant treated E. faecalis biofilms. Raman spectroscopy of biofilms were performed after bacterial re-growth on root dentine and exposed to different irrigation protocols and collagen fibers analysed collagen fibers using TEM. Antimicrobial potency against E. faecalis biofilms and cytoxicity against 3T3 NIH cells were also. Resin penetration and MitoTracker green were also evaluated for sealer penetration and mitochondrial viability. Data were analysed using One-way ANOVA, principal component analysis and post-hoc Fisher's least-significant difference. RESULTS Elastic moduli were maintained amongst control (5.5 ± 0.9) and 3.5% QIS (4.4 ± 1.1) specimens with surface free energy higher in QIS specimens. MC3T3 cells showed reduced viability in 6%NaOCl+2%CHX specimens compared to QIS specimens. DNA/purine were expressed in increased intensities in control and 6% NaOCl + 2% CHX specimens with bands around 480-490 cm-1 reduced in QIS specimens. 3.5% QIS specimens showed intact collagen fibrillar network and predominantly dead bacterial cells in confocal microscopy. 3.5% QIS irrigant formed a thin crust-type surface layer with cytoplasmic extensions of 3T3NIH spread over root dentine. Experiments confirmed MitoTracker accumulation in 3.5% treated cells. SIGNIFICANCE Novel QIS root canal irrigant achieved optimum antimicrobial protection inside the root canals facilitating a toxic effect against the Enterococcus faecalis biofilm. Root dentine substrates exhibited optimum mechanical properties and there was viability of fibroblastic mitochondria.
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Affiliation(s)
- Umer Daood
- Division of Clinical Dentistry, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000 Bukit Jalil, Wilayah Persekutuan Kuala Lumpur, Malaysia.
| | - Abhishek Parolia
- Division of Clinical Dentistry, School of Dentistry, International Medical University Kuala Lumpur, 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000 Bukit Jalil, Wilayah Persekutuan Kuala Lumpur, Malaysia
| | - Jukka Matinlinna
- Dental Materials Science, Applied Oral Sciences, Faculty of Dentistry, The University of Hong Kong, 34 Hospital Road, Sai Ying Pun, Hong Kong SAR, China
| | - Cynthia Yiu
- Pediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, Prince Philip Dental Hospital, 34 Hospital Road, Pokfulam, Hong Kong, China Hong Kong Special Administrative Region
| | - Hany Mohamed Aly Ahmed
- Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Amr Fawzy
- UWA Dental School, University of Western Australia, Nedlands, WA 6009, Australia
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Gao H, Sun T, Yang F, Yuan J, Yang M, Kang W, Tang D, Zhang J, Feng Q. The Pathogenic Effects of Fusobacterium nucleatum on the Proliferation, Osteogenic Differentiation, and Transcriptome of Osteoblasts. Front Cell Dev Biol 2020; 8:807. [PMID: 33042984 PMCID: PMC7517582 DOI: 10.3389/fcell.2020.00807] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 07/31/2020] [Indexed: 12/11/2022] Open
Abstract
As one of the most common oral diseases, periodontitis is closely correlated with tooth loss in middle-aged and elderly people. Fusobacterium nucleatum (F. nucleatum) contributes to periodontitis, but the evidence in alveolar bone loss is still unclear. In this study, cytological experiments and transcriptome analyses were performed to characterize the biological process abnormalities and the molecular changes of F. nucleatum-stimulated osteoblasts. F. nucleatum could inhibit cell proliferation, promote cell apoptosis, and elevate pro-inflammatory cytokine production of osteoblasts, and it also inhibited osteoblast differentiation and mineralized nodule formation and decreased the expression of osteogenetic genes and proteins. Whole-transcriptome analyses identified a total of 235 transcripts that were differentially expressed in all six time points, most of which were inflammation-related genes. The genes, Ccl2, Ccl20, Csf1, Cx3cl1, Cxcl1, Cxcl3, Il6, Birc3, Map3k8, Nos2, Nfkb2, Tnfrsf1b, and Vcam1, played core roles in a PPI network, and interacted closely with other ones in the infection. In addition, 133 osteogenesis-related differential expression genes (DEGs) were time-serially dynamically changed in a short time-series expression miner (STEM) analysis, which were enriched in multiple cancer-related pathways. The core dynamic DEGs (Mnda, Cyp1b1, Comp, Phex, Mmp3, Tnfrsf1b, Fbln5, and Nfkb2) had been reported to be closely related to the development and metastasis in tumor and cancer progress. This study is the first to evaluate the long-term interaction of F. nucleatum on osteoblasts, which might increase the risk of cell carcinogenesis of normal osteoblasts, and provides new insight into the pathogenesis of bacterial-induced bone destruction.
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Affiliation(s)
- Hui Gao
- Department of Orthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China.,Department of Human Microbiome, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China.,Department of Stomatology, Weifang People's Hospital, Weifang, China
| | - Tianyong Sun
- Department of Human Microbiome, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Fanghong Yang
- Department of Stomatology, Weifang People's Hospital, Weifang, China
| | - Jiakan Yuan
- Department of Orthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China.,Department of Stomatology, Heze Municipal Hospital, Heze, China
| | - Mei Yang
- Department of General Dentistry, Qingdao Stomatological Hospital, Qingdao, China
| | - Wenyan Kang
- Department of Human Microbiome, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China.,Department of Periodontology, School of Stomatology, Shandong University, Jinan, China
| | - Di Tang
- Department of Human Microbiome, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Jun Zhang
- Department of Orthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Qiang Feng
- Department of Human Microbiome, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University and Shandong Key Laboratory of Oral Tissue Regeneration and Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China.,State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
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Aral K, Milward MR, Cooper PR. Dysregulation of Inflammasomes in Human Dental Pulp Cells Exposed to Porphyromonas gingivalis and Fusobacterium nucleatum. J Endod 2020; 46:1265-1272. [DOI: 10.1016/j.joen.2020.06.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 06/02/2020] [Accepted: 06/09/2020] [Indexed: 12/17/2022]
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Horiuchi A, Kokubu E, Warita T, Ishihara K. Synergistic biofilm formation by Parvimonas micra and Fusobacterium nucleatum. Anaerobe 2020; 62:102100. [DOI: 10.1016/j.anaerobe.2019.102100] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 09/06/2019] [Accepted: 09/10/2019] [Indexed: 12/23/2022]
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Frequency and levels of candidate endodontic pathogens in acute apical abscesses as compared to asymptomatic apical periodontitis. PLoS One 2018; 13:e0190469. [PMID: 29293651 PMCID: PMC5749828 DOI: 10.1371/journal.pone.0190469] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 12/17/2017] [Indexed: 02/05/2023] Open
Abstract
Introduction Acute apical abscess is caused by bacteria that leave the infected dental root canal to invade the periodontal tissues. Most species occurring in abscesses are also found in asymptomatic infections; therefore, the possibility exists that not only the presence of certain species but also their specific counts influence the appearance of symptoms. This molecular study compared the frequency and levels of several candidate endodontic pathogens in teeth with acute apical abscesses and asymptomatic apical periodontitis. Methods Samples were taken from the root canals of teeth with asymptomatic apical periodontitis (n = 73) and by aspiration of purulent exudate from acute abscesses (n = 55). DNA was extracted from samples and bacterial identifications were performed by a closed-ended semi-quantitative reverse-capture checkerboard approach targeting 40 bacterial species/phylotypes. Results Bacterial DNA was detected in all cases. In abscesses, the most prevalent taxa were Fusobacterium nucleatum (60%), Porphyromonas endodontalis (53%), Parvimonas micra (51%), and Streptococcus species (45%). The most frequently detected taxa in asymptomatic teeth were P. endodontalis (63%), Dialister invisus (58%), Olsenella uli (56%), and F. nucleatum (51%). None of the targeted taxa were significantly associated with abscesses when only mere presence was evaluated (p>0.05). However, semi-quantitative data demonstrated that P. endodontalis, Prevotella baroniae, Treponema denticola and Streptococcus species were significantly more frequent at levels >105 in abscesses than in asymptomatic cases (p<0.05). Conclusion None of the target species/phylotypes were associated with abscesses in terms of frequency. However, some taxa were significantly found in higher levels in abscesses. Presence of a potentially virulent pathogen in high counts may increase the collective pathogenicity of the bacterial community and give rise to symptoms.
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Alfenas CF, Mendes TA, Ramos HJ, Bruckner FP, Antunes HS, Rôças IN, Siqueira JF, Provenzano JC. Human Exoproteome in Acute Apical Abscesses. J Endod 2017; 43:1479-1485. [DOI: 10.1016/j.joen.2017.04.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 03/09/2017] [Accepted: 04/17/2017] [Indexed: 11/26/2022]
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Novel bioactive root canal sealer to inhibit endodontic multispecies biofilms with remineralizing calcium phosphate ions. J Dent 2017; 60:25-35. [DOI: 10.1016/j.jdent.2017.02.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 02/10/2017] [Accepted: 02/15/2017] [Indexed: 11/22/2022] Open
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Reynolds-Campbell G, Nicholson A, Thoms-Rodriguez CA. Oral Bacterial Infections: Diagnosis and Management. Dent Clin North Am 2017; 61:305-318. [PMID: 28317568 DOI: 10.1016/j.cden.2016.12.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The human oral cavity contains more than 500 different bacterial species. These organisms belong to several phyla including Bacteroidetes, Firmicutes, Tenericutes, Actinobacteria, Proteobacteria, Euryarchaeota, Chlamydiae, and Spirochaetes. Many of these have the ability to colonize the gingival crevices and the outer surface of the tooth forming biofilms often leading to dental plaque formation. These bacteria produce acid that erode teeth causing cavities or infections. The diagnosis of these infections is often clinical and antibiotics are used empirically to treat some infections or as prophylaxis. The characterization, definitive diagnosis, and susceptibility testing of oral bacterial infections are valuable in guiding appropriate therapy and in prevention of disease.
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Affiliation(s)
| | - Alison Nicholson
- Department of Microbiology, The University of the West Indies, Mona, KGN 7, Jamaica, West Indies
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25
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Tatikonda A, Sudheep N, Biswas KP, Gowtham K, Pujari S, Singh P. Evaluation of Bacteriological Profile in the Apical Root Segment of the Patients with Primary Apical Periodontitis. J Contemp Dent Pract 2017; 18:44-48. [PMID: 28050984 DOI: 10.5005/jp-journals-10024-1986] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
INTRODUCTION Apical periodontitis usually results from bacterial accumulation and contamination occurring in the root-canal system, and extending beyond the apical foramen to involve the periapical tissues. Literature has a paucity of the studies that stress on the division and analysis of the pulp canal segments. The reason for this disparity might be the technique used for collecting the samples from the pulp canals. Hence, we carried out the present study to evaluate the microbial flora in the apical part of the roots with necrotic pulp canals. MATERIALS AND METHODS The present study included the assessment of 40 freshly extracted teeth that had necrotized pulpal tissue along with the presence of periapical periodontal lesions. Removal of the soft tissue lesions attached to the root portion of the teeth along with apical periodontal lesions was done with the help of scalpel blade, after rinsing them with a sterile solution of saline. Thorough cleaning of the root surfaces was done with hydrogen peroxide followed by rapid disinfection with the help of sodium hypochlorite at varying concentrations. Sectioning of the root portion of all the specimens with the help of a disk was done perpendicular to the long axis of the teeth at a distance of roughly 5 to 6 mm from the teeth's apicalmost point. Cryotubes were used for transferring the specimens of apical portions containing 1 mL of buffer and were subjected to immediate frozen processing at a temperature of -20°C. A 10 K-type file was used for the initial collection of the samples followed by subsequent incubation of the files and paper pints in the incubation cabinet. Subsequent deoxyribonucleic acid (DNA) extraction from the samples was done following the procedure described by Siqueira et al. Paster et al's modification of the reverse-capture checkerboard assay was used in the present study. Semiquantitative data were used for overcoming the difficulties arising due to obtaining the counts of the polymerase chain reaction (PCR)-based analysis of specimens. RESULTS A positive result for the 16S ribosomal ribonucleic acid (rRNA) gene primer was observed only in two examined specimens of all the samples of the apical portion of the root canals in the present study. Negative result was shown by all the control group specimens, which were sterile samples. Presence of bacteria was confirmed by PCR in 38 out of 40 examined specimens. Amount of bacterial taxa, out of these 24 samples, ranged up to 6. Pseudoramibacter alactolyticus, Porphyromonas endodontalis, Dialister oral species, Bacteroidetes species, Streptococcus species, Olsenella uli, Synergistes species, Fusobacterium nucleatum, Parvimonas micra, Treponema denticola, and Filifactor alocis were the specific species detected. Bacteroidetes species was the only species that were detected at levels at or above 105. Heavy bacterial infections were noticed in more than 45% of the cases at the periradicular part of the root canals. CONCLUSION Microbial flora of the apical segment of the root with necrotized pulp tissue comprises a vast variety of pathogenic bacteria. CLINICAL SIGNIFICANCE For better prognosis of the treatment of such cases, adequate knowledge of the microbial flora of the root, especially the apical portion is necessary.
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Affiliation(s)
- Aravind Tatikonda
- Department of Periodontics, Triveni Institute of Dental Sciences Bilaspur, Chhattisgarh, India, Phone: +919501544877, e-mail:
| | - N Sudheep
- Department of Periodontics, Educare Institute of Dental Sciences, Malappuram, Kerala, India
| | - Krishna P Biswas
- Department of Conservative Dentistry and Endodontics, Tamil Nadu Government Dental College and Hospital, Chennai, Tamil Nadu, India
| | - K Gowtham
- Department of Conservative Dentistry and Endodontics, Malla Reddy Dental College, Hyderabad, Telangana, India
| | - Sudarshan Pujari
- Department of Conservative Dentistry and Endodontics, Pandit Deendayal Upadhyay Dental College, Solapur, Maharashtra, India
| | - Padam Singh
- Department of Periodontology and Implantology, ITS Dental College, Greater Noida, Uttar Pradesh, India
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Lang PM, Jacinto RC, Dal Pizzol TS, Ferreira MBC, Montagner F. Resistance profiles to antimicrobial agents in bacteria isolated from acute endodontic infections: systematic review and meta-analysis. Int J Antimicrob Agents 2016; 48:467-474. [DOI: 10.1016/j.ijantimicag.2016.08.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 08/02/2016] [Accepted: 08/08/2016] [Indexed: 01/01/2023]
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Nóbrega LMM, Montagner F, Ribeiro AC, Mayer MAP, Gomes BPFDA. Bacterial diversity of symptomatic primary endodontic infection by clonal analysis. Braz Oral Res 2016; 30:e103. [PMID: 27737357 DOI: 10.1590/1807-3107bor-2016.vol30.0103] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 07/05/2016] [Indexed: 03/29/2023] Open
Abstract
The aim of this study was to explore the bacterial diversity of 10 root canals with acute apical abscess using clonal analysis. Samples were collected from 10 patients and submitted to bacterial DNA isolation, 16S rRNA gene amplification, cloning, and sequencing. A bacterial genomic library was constructed and bacterial diversity was estimated. The mean number of taxa per canal was 15, ranging from 11 to 21. A total of 689 clones were analyzed and 76 phylotypes identified, of which 47 (61.84%) were different species and 29 (38.15%) were taxa reported as yet-uncultivable or as yet-uncharacterized species. Prevotella spp., Fusobacterium nucleatum, Filifactor alocis, and Peptostreptococcus stomatis were the most frequently detected species, followed by Dialister invisus, Phocaeicola abscessus, the uncharacterized Lachnospiraceae oral clone, Porphyromonas spp., and Parvimonas micra. Eight phyla were detected and the most frequently identified taxa belonged to the phylum Firmicutes (43.5%), followed by Bacteroidetes (22.5%) and Proteobacteria (13.2%). No species was detected in all studied samples and some species were identified in only one case. It was concluded that acute primary endodontic infection is characterized by wide bacterial diversity and a high intersubject variability was observed. Anaerobic Gram-negative bacteria belonging to the phylum Firmicutes, followed by Bacteroidetes, were the most frequently detected microorganisms.
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Affiliation(s)
| | - Francisco Montagner
- Universidade Federal do Rio Grande do Sul (UFRGS), Department of Conservative Dentistry, Porto Alegre, RS, Brazil
| | - Adriana Costa Ribeiro
- Universidade de São Paulo (USP), Institute of Biomedical Science, Department of Oral Microbiology, São Paulo, SP, Brazil
| | - Márcia Alves Pinto Mayer
- Universidade de São Paulo (USP), Institute of Biomedical Science, Department of Oral Microbiology, São Paulo, SP, Brazil
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Kist S, Kollmuss M, Jung J, Schubert S, Hickel R, Huth KC. Comparison of ozone gas and sodium hypochlorite/chlorhexidine two-visit disinfection protocols in treating apical periodontitis: a randomized controlled clinical trial. Clin Oral Investig 2016; 21:995-1005. [PMID: 27173580 DOI: 10.1007/s00784-016-1849-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 05/04/2016] [Indexed: 11/24/2022]
Abstract
OBJECTIVES In this single-blinded, prospective, randomized, controlled clinical trial, the effectiveness of an ozone gas or NaOCl/CHX disinfection protocol was compared within the root canal treatment of apical periodontitis. MATERIALS AND METHODS Sixty permanent teeth were randomly allocated to one technique. The clinical/radiographic assessment criteria included clinical symptoms, periapical index (PAI), and size of the apical lesion. In both groups, the root canal was mechanically cleaned and irrigated with NaCl and EDTA. Ozone gas (32 g m-3) or NaOCl (3 %) was applied followed by a 1-week inter-appointment dressing (Ca(OH)2). As final disinfection, ozone gas (ozone group) or CHX 2 % (NaOCl group) was applied. Microbial samples were taken after preparing the access cavity, after chemo-mechanical treatment and after inter-appointment dressing by sterile paper points. Microbial identification was performed by mass spectroscopy (MALDI-TOF-MS) and 16S-rRNA gene sequencing. The treated teeth were blindly re-evaluated after 6/12 months. Success rates, the decrease in PAI, the size of apical lesions and bacterial reduction were compared between groups (Fischer's exact test, Mann-Whitney U test). RESULTS There were no significant differences between the success rates (ozone group: 96.2/95.5 % after 6/12 months; NaOCl group: 95.5/95.2 % after 6/12 months). The differences in the decreases in PAI values and apical lesion sizes were also insignificant after 6 and 12 months. The bacterial reduction showed no significant differences between groups after chemo-mechanical treatment and after inter-appointment dressing. The most commonly found bacterial genera were Streptococcus spp., Parvimonas spp. and Prevotella spp. CONCLUSIONS The here used ozone gas and NaOCl/CHX protocols showed no difference in bacterial reduction in the sampled areas of the root canals. CLINICAL RELEVANCE Within the limitations of the study, ozone gas seems to be a possible alternative disinfection agent within the root canal treatment of apical periodontitis.
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Affiliation(s)
- Stefan Kist
- Department of Restorative Dentistry, Periodontology & Paedodontics, Ludwig Maximilians University, Goethestrasse 70, 80336, Munich, Germany
| | - Maximilian Kollmuss
- Department of Restorative Dentistry, Periodontology & Paedodontics, Ludwig Maximilians University, Goethestrasse 70, 80336, Munich, Germany
| | - Jette Jung
- Max-von-Pettenkofer Institute for Hygiene and Clinical Microbiology, Ludwig Maximilians University, Munich, Germany
| | - Sören Schubert
- Max-von-Pettenkofer Institute for Hygiene and Clinical Microbiology, Ludwig Maximilians University, Munich, Germany
| | - Reinhard Hickel
- Department of Restorative Dentistry, Periodontology & Paedodontics, Ludwig Maximilians University, Goethestrasse 70, 80336, Munich, Germany
| | - Karin Christine Huth
- Department of Restorative Dentistry, Periodontology & Paedodontics, Ludwig Maximilians University, Goethestrasse 70, 80336, Munich, Germany.
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George N, Flamiatos E, Kawasaki K, Kim N, Carriere C, Phan B, Joseph R, Strauss S, Kohli R, Choi D, Baumgartner JC, Sedgley C, Maier T, Machida CA. Oral microbiota species in acute apical endodontic abscesses. J Oral Microbiol 2016; 8:30989. [PMID: 26983837 PMCID: PMC4794734 DOI: 10.3402/jom.v8.30989] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 02/17/2016] [Accepted: 02/18/2016] [Indexed: 01/01/2023] Open
Abstract
Background and objectives Acute apical abscesses are serious endodontic diseases resulting from pulpal infection with opportunistic oral microorganisms. The objective of this study was to identify and compare the oral microbiota in patients (N=18) exhibiting acute apical abscesses, originating from the demographic region in Portland, Oregon. The study hypothesis is that abscesses obtained from this demographic region may contain unique microorganisms not identified in specimens from other regions. Design Endodontic abscesses were sampled from patients at the Oregon Health & Science University (OHSU) School of Dentistry. DNA from abscess specimens was subjected to polymerase chain reaction amplification using 16S rRNA gene-specific primers and Cy3-dCTP labeling. Labeled DNA was then applied to microbial microarrays (280 species) generated by the Human Oral Microbial Identification Microarray Laboratory (Forsyth Institute, Cambridge, MA). Results The most prevalent microorganisms, found across multiple abscess specimens, include Fusobacterium nucleatum, Parvimonas micra, Megasphaera species clone CS025, Prevotella multisaccharivorax, Atopobium rimae, and Porphyromonas endodontalis. The most abundant microorganisms, found in highest numbers within individual abscesses, include F. nucleatum, P. micra, Streptococcus Cluster III, Solobacterium moorei, Streptococcus constellatus, and Porphyromonas endodontalis. Strong bacterial associations were identified between Prevotella multisaccharivorax, Acidaminococcaceae species clone DM071, Megasphaera species clone CS025, Actinomyces species clone EP053, and Streptococcus cristatus (all with Spearman coefficients >0.9). Conclusions Cultivable and uncultivable bacterial species have been identified in endodontic abscesses obtained from the Portland, Oregon demographic region, and taxa identifications correlated well with other published studies, with the exception of Treponema and Streptococcus cristae, which were not commonly identified in endodontic abscesses between the demographic region in Portland, Oregon and other regions.
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Affiliation(s)
- Noelle George
- Academic DMD Program, School of Dentistry, Oregon Health & Science University (OHSU), Portland, OR, USA
| | - Erin Flamiatos
- Academic DMD Program, School of Dentistry, Oregon Health & Science University (OHSU), Portland, OR, USA
| | - Kellie Kawasaki
- Academic DMD Program, School of Dentistry, Oregon Health & Science University (OHSU), Portland, OR, USA
| | - Namgu Kim
- Academic DMD Program, School of Dentistry, Oregon Health & Science University (OHSU), Portland, OR, USA
| | - Charles Carriere
- Academic DMD Program, School of Dentistry, Oregon Health & Science University (OHSU), Portland, OR, USA
| | - Brian Phan
- Academic DMD Program, School of Dentistry, Oregon Health & Science University (OHSU), Portland, OR, USA
| | - Raphael Joseph
- Academic DMD Program, School of Dentistry, Oregon Health & Science University (OHSU), Portland, OR, USA
| | - Shay Strauss
- Department of Integrative Biosciences, School of Dentistry, Oregon Health & Science University (OHSU), Portland, OR, USA
| | - Richie Kohli
- Department of Community Dentistry, School of Dentistry, Oregon Health & Science University (OHSU), Portland, OR, USA
| | - Dongseok Choi
- Department of Community Dentistry, School of Dentistry, Oregon Health & Science University (OHSU), Portland, OR, USA.,School of Public Health, Oregon Health & Science University (OHSU), Portland, OR, USA
| | - J Craig Baumgartner
- Department of Endodontology, School of Dentistry, Oregon Health & Science University (OHSU), Portland, OR, USA
| | - Christine Sedgley
- Department of Endodontology, School of Dentistry, Oregon Health & Science University (OHSU), Portland, OR, USA
| | - Tom Maier
- Department of Integrative Biosciences, School of Dentistry, Oregon Health & Science University (OHSU), Portland, OR, USA.,Department of Pathology and Radiology, School of Dentistry, Oregon Health & Science University (OHSU), Portland, OR, USA
| | - Curtis A Machida
- Department of Integrative Biosciences, School of Dentistry, Oregon Health & Science University (OHSU), Portland, OR, USA.,Department of Pediatric Dentistry, School of Dentistry, Oregon Health & Science University (OHSU), Portland, OR, USA;
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Keine KC, Kuga MC, Pereira KF, Diniz ACS, Tonetto MR, Galoza MOG, Magro MG, de Barros YBAM, Bandéca MC, de Andrade MF. Differential Diagnosis and Treatment Proposal for Acute Endodontic Infection. J Contemp Dent Pract 2015; 16:977-983. [PMID: 27018033 DOI: 10.5005/jp-journals-10024-1791] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The objective of this study was to describe the main lesions that simulate clinically and propose a treatment protocol for acute endodontic infection. Signs and clinical symptoms of periodontal abscess, gingival abscess, odontoma, herpes simplex, pericoronitis, acute pulpitis and necrotizing ulcerative gingivitis/periodontitis (NUG/NUP) were described and compared with acute endodontic infections. A treatment protocol was described by optimizing the procedures in access cavity, microbial decontamination and detoxification of the root canal, apical debridement, intracanal and systemic medication and surgical drainage procedures. The convenience of the use of 5.25% sodium hypochlorite, root canal instrumentation using a crown-down technique, intracanal medication with 2% chlorhexidine or triple antibiotic paste and the convenience of the use of antibiotics, analgesics, and surgical drainage to solve cases of acute dentoalveolar abscess was discussed.
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Affiliation(s)
- Kátia Cristina Keine
- Department of Restorative Dentistry, School of Dentistry University Estadual Paulista, Araraquara, Sao Paulo, Brazil
| | - Milton Carlos Kuga
- Professor Department of Restorative Dentistry, School of Dentistry University Estadual Paulista, Rua Humaita 1680 CEP 14801-903, Araraquara, Sao Paulo, Brazil, e-mail:
| | - Kamila Figueiredo Pereira
- Department of Restorative Dentistry, School of Dentistry University Estadual Paulista, Araraquara, Sao Paulo, Brazil
| | - Ana Carolina Soares Diniz
- Department of Postgraduate Program in Dentistry, School of Dentistry, CEUMA University, Sao Luis, MA, Brazil
| | - Mateus Rodrigues Tonetto
- Department of Postgraduate Program in Integrated Dental Science, School of Dentistry, University of Cuiaba-UNIC, Cuiaba MT, Brazil
| | | | - Miriam Graziele Magro
- Department of Restorative Dentistry, School of Dentistry University Estadual Paulista, Araraquara, Sao Paulo, Brazil
| | | | - Matheus Coelho Bandéca
- Department of Postgraduate Program in Dentistry, School of Dentistry, CEUMA University, Sao Luis, MA, Brazil
| | - Marcelo Ferrarezi de Andrade
- Department of Restorative Dentistry, School of Dentistry University Estadual Paulista, Araraquara, Sao Paulo, Brazil
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Rôças IN, Lima KC, Assunção IV, Gomes PN, Bracks IV, Siqueira JF. Advanced Caries Microbiota in Teeth with Irreversible Pulpitis. J Endod 2015; 41:1450-5. [DOI: 10.1016/j.joen.2015.05.013] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 05/18/2015] [Accepted: 05/19/2015] [Indexed: 02/02/2023]
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Prevalence of Treponema Species Detected in Endodontic Infections: Systematic Review and Meta-regression Analysis. J Endod 2015; 41:579-87. [DOI: 10.1016/j.joen.2015.01.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 11/25/2014] [Accepted: 01/17/2015] [Indexed: 11/20/2022]
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Han YW. Fusobacterium nucleatum: a commensal-turned pathogen. Curr Opin Microbiol 2015; 23:141-7. [PMID: 25576662 DOI: 10.1016/j.mib.2014.11.013] [Citation(s) in RCA: 459] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Revised: 11/17/2014] [Accepted: 11/18/2014] [Indexed: 12/11/2022]
Abstract
Fusobacterium nucleatum is an anaerobic oral commensal and a periodontal pathogen associated with a wide spectrum of human diseases. This article reviews its implication in adverse pregnancy outcomes (chorioamnionitis, preterm birth, stillbirth, neonatal sepsis, preeclampsia), GI disorders (colorectal cancer, inflammatory bowel disease, appendicitis), cardiovascular disease, rheumatoid arthritis, respiratory tract infections, Lemierre's syndrome and Alzheimer's disease. The virulence mechanisms involved in the diseases are discussed, with emphasis on its colonization, systemic dissemination, and induction of host inflammatory and tumorigenic responses. The FadA adhesin/invasin conserved in F. nucleatum is a key virulence factor and a potential diagnostic marker for F. nucleatum-associated diseases.
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Affiliation(s)
- Yiping W Han
- Division of Periodontics, Section of Oral Diagnostics & Sciences, College of Dental Medicine, Columbia University Medical Center, United States; Department of Microbiology & Immunology, College of Physicians & Surgeons, Columbia University Medical Center, United States; Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, United States.
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Cardinali F, Fornara R, Gorni F, Gagliani M. La risoluzione delle complessità nei ritrattamenti. DENTAL CADMOS 2014. [DOI: 10.1016/s0011-8524(14)70242-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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35
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Cachovan G, Blessmann M, Schön G, Rother U, Heiland M, Stürenburg E, Platzer U, Sobottka I. Radiography-based score indicative for the pathogenicity of bacteria in odontogenic infections. Acta Odontol Scand 2014; 72:530-6. [PMID: 24444257 DOI: 10.3109/00016357.2013.876553] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE To develop a new radiography-based score to assess the potential of bacteria to cause odontogenic infections derived from the occurrence of bacteria at small or large radiographical lesions. MATERIALS AND METHODS The patients analyzed were a sub-population from a large randomized clinical trial comparing moxifloxacin and clindamycin in the treatment of inflammatory infiltrates and odontogenic abscesses. Routine radiographs were used to analyze the area of the periapical radiolucent lesions. Lesions were stratified by their radiographically measured area as large (>9 mm(2)) or small (≤9 mm(2)). A risk ratio was calculated for each species from the frequency of their occurrence in large vs in small lesions. RESULTS Fifty-one patients, 19 with abscesses and 32 with infiltrates, were evaluated. Overall, the radiographical lesion areas ranged from 0.4-46.2 mm(2) (median = 9 mm(2)). An increased risk (risk ratio >1) to occur at large abscess lesions was observed for Prevotella (P.) oralis, P. buccae, P. oris, P. intermedia, Fusobacterium nucleatum and Streptococcus (Strep.) anginosus group. An increased risk to occur at large infiltrate lesions was found for Strep. salivarius, Strep. parasanguis, Strep. anginosus group, Capnocytophaga spp., Neisseria (N.) sicca, Neisseria spp., Staphylococcus (Staph.) aureus, P. intermedia, P. buccae, Prevotella spp. and P. melaninogenica. CONCLUSIONS The radiography-based score suggests that certain Prevotella spp., F. nucleatum and Strep. anginosus groups play a crucial role in the pathogenesis of odontogenic abscesses, and that various streptococci, Neisseria spp., Capnocytophaga spp., Staph. aureus and Prevotella spp. are involved in the pathogenesis of odontogenic infiltrates.
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Affiliation(s)
- Georg Cachovan
- Center for Oral and Dental Medicine, Department of Restorative and Preventive Dentistry
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Sousa ELR, Martinho FC, Leite FRM, Nascimento GG, Gomes BPFA. Macrophage cell activation with acute apical abscess contents determined by interleukin-1 Beta and tumor necrosis factor alpha production. J Endod 2014; 40:1752-7. [PMID: 25205261 DOI: 10.1016/j.joen.2014.06.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2014] [Revised: 04/22/2014] [Accepted: 06/10/2014] [Indexed: 11/25/2022]
Abstract
INTRODUCTION This clinical study has investigated the antigenic activity of bacterial contents from exudates of acute apical abscesses (AAAs) and their paired root canal contents regarding the stimulation capacity by levels of interleukin (IL)-1 beta and tumor necrosis factor alpha (TNF-α) throughout the root canal treatment against macrophage cells. METHODS Paired samples of infected root canals and exudates of AAAs were collected from 10 subjects. Endodontic contents were sampled before (root canal sample [RCS] 1) and after chemomechanical preparation (RCS2) and after 30 days of intracanal medication with calcium hydroxide + chlorhexidine gel (Ca[OH]2 + CHX gel) (RCS3). Polymerase chain reaction (16S rDNA) was used for detection of the target bacteria, whereas limulus amebocyte lysate was used to measure endotoxin levels. Raw 264.7 macrophages were stimulated with AAA exudates from endodontic contents sampled in different moments of root canal treatment. Enzyme-linked immunosorbent assays were used to measure the levels of TNF-α and IL-1 beta. RESULTS Parvimonas micra, Porphyromonas endodontalis, Dialister pneumosintes, and Prevotella nigrescens were the most frequently detected species. Higher levels of endotoxins were found in samples from periapical exudates at RCS1 (P < .005). In fact, samples collected from periapical exudates showed a higher stimulation capacity at RCS1 (P < .05). A positive correlation was found between endotoxins from exudates with IL-1 beta (r = 0.97) and TNF-α (r = 0.88) production (P < .01). The significant reduction of endotoxins and bacterial species achieved by chemomechanical procedures (RCS2) resulted in a lower capacity of root canal contents to stimulate the cells compared with that at RCS1 (P < .05). The use of Ca(OH)2 + CHX gel as an intracanal medication (RCS3) improved the removal of endotoxins and bacteria from infected root canals (P < .05) whose contents induced a lower stimulation capacity against macrophages cells at RCS1, RCS2, and RCS3 (P < .05). CONCLUSIONS AAA exudates showed higher levels of endotoxins and showed a greater capacity of macrophage stimulation than the paired root canal samples. Moreover, the use of intracanal medication improved the removal of bacteria and endotoxins from infected root canals, which may have resulted in the reduction of the inflammatory potential of the root canal content.
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Affiliation(s)
- Ezilmara L R Sousa
- Department of Restorative Dentistry, Endodontics Division, Piracicaba Dental School, State University of Campinas, UNICAMP, Piracicaba, São Paulo, Brazil; Department of Conservative Dentistry, Endodontics Division, Pelotas School of Dentistry
| | - Frederico C Martinho
- Department of Restorative Dentistry, Endodontics Division, Piracicaba Dental School, State University of Campinas, UNICAMP, Piracicaba, São Paulo, Brazil; Department of Restorative Dentistry, Endodontics Division, São Jose dos Campos Dental School, State University of São Paulo, UNESP, São Jose dos Campos, São Paulo, Brazil
| | | | - Gustavo G Nascimento
- Pelotas School of Dentistry, Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil
| | - Brenda P F A Gomes
- Department of Restorative Dentistry, Endodontics Division, Piracicaba Dental School, State University of Campinas, UNICAMP, Piracicaba, São Paulo, Brazil.
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Matsumura H, Suzuki H, Ito Y, Kino H, Tamai K, Notake S, Nakamura K, Shiigai M, Uemura K, Matsumura A. A case of cavernous sinus thrombosis caused by Dialister pneumosintes, Slackia exigua and Prevotella baroniae. JMM Case Rep 2014. [DOI: 10.1099/jmmcr.0.002683] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Hideaki Matsumura
- Department of Neurosurgery, Tsukuba Medical Center Hospital, 1‐3‐1 Amakubo, Tsukuba, Ibaraki 305‐8558, Japan
| | - Hiromichi Suzuki
- Department of Infectious Diseases, Department of Medicine, Tsukuba Medical Center Hospital, 1‐3‐1 Amakubo, Tsukuba, Ibaraki 305‐8558, Japan
| | - Yoshiro Ito
- Department of Neurosurgery, Tsukuba Medical Center Hospital, 1‐3‐1 Amakubo, Tsukuba, Ibaraki 305‐8558, Japan
| | - Hiroyoshi Kino
- Department of Neurosurgery, Tsukuba Medical Center Hospital, 1‐3‐1 Amakubo, Tsukuba, Ibaraki 305‐8558, Japan
| | - Kiyoko Tamai
- Miroku Medical Laboratory Inc., 659‐2 Innai, Saku, Nagano 384‐2201, Japan
| | - Shigeyuki Notake
- Miroku Medical Laboratory Inc., 659‐2 Innai, Saku, Nagano 384‐2201, Japan
| | - Kazuhiro Nakamura
- Department of Neurosurgery, Tsukuba Medical Center Hospital, 1‐3‐1 Amakubo, Tsukuba, Ibaraki 305‐8558, Japan
| | - Masanari Shiigai
- Department of Radiology, Tsukuba Medical Center Hospital, 1‐3‐1 Amakubo, Tsukuba, Ibaraki 305‐8558, Japan
| | - Kazuya Uemura
- Department of Neurosurgery, Tsukuba Medical Center Hospital, 1‐3‐1 Amakubo, Tsukuba, Ibaraki 305‐8558, Japan
| | - Akira Matsumura
- Department of Neurosurgery, University of Tsukuba Hospital, 2‐1‐1 Amakubo, Tsukuba, Ibaraki 305‐8576, Japan
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Parahitiyawa NB, Chu FCS, Leung WK, Yam WC, Jin LJ, Samaranayake LP. Clonality of bacterial consortia in root canals and subjacent gingival crevices. ACTA ACUST UNITED AC 2014; 6:32-9. [DOI: 10.1111/jicd.12070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2013] [Accepted: 03/31/2014] [Indexed: 10/24/2022]
Affiliation(s)
- Nipuna B. Parahitiyawa
- Department of Oral Bio-Sciences; Faculty of Dentistry and Department of Microbiology; The University of Hong Kong; Hong Kong SAR China
| | - Frederick C. S. Chu
- Department of Comprehensive Dental Care; Faculty of Dentistry and Department of Microbiology; The University of Hong Kong; Hong Kong SAR China
| | - Wai K. Leung
- Department of Periodontology; Faculty of Dentistry and Department of Microbiology; The University of Hong Kong; Hong Kong SAR China
| | - Wing C. Yam
- Li Ka Shing Faculty of Medicine; The University of Hong Kong; Hong Kong SAR China
| | - Li Jian Jin
- Department of Periodontology; Faculty of Dentistry and Department of Microbiology; The University of Hong Kong; Hong Kong SAR China
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Identification of Synergistetes in endodontic infections. Microb Pathog 2014; 73:1-6. [DOI: 10.1016/j.micpath.2014.05.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 04/24/2014] [Accepted: 05/05/2014] [Indexed: 11/24/2022]
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41
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Siqueira JF, Rôças IN. Present status and future directions in endodontic microbiology. ACTA ACUST UNITED AC 2014. [DOI: 10.1111/etp.12060] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Kaakoush NO, Castaño-Rodríguez N, Day AS, Lemberg DA, Leach ST, Mitchell HM. Campylobacter concisus and exotoxin 9 levels in paediatric patients with Crohn’s disease and their association with the intestinal microbiota. J Med Microbiol 2014; 63:99-105. [DOI: 10.1099/jmm.0.067231-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023] Open
Abstract
There is mounting evidence for a possible role for Campylobacter concisus in Crohn’s disease (CD). However, the pathogenic potential of C. concisus remains disputed due to its presence in healthy subjects. It is documented that genetic diversity exists within this species, with some strains possessing putative virulence determinants such as exotoxin 9/DnaI that may enable them to persist intracellularly in host cells. In order to clarify this, we employed real-time PCR to determine C. concisus and exotoxin 9 levels within faecal samples of CD patients and healthy controls, and correlated these levels with abundances of microbial taxa identified in a subset of subjects. Both C. concisus and exotoxin 9 levels were found to be higher in CD patients than healthy controls, suggesting not only that CD patients had a greater abundance of C. concisus but also that their strains were likely to be more virulent. Moreover, C. concisus levels correlated with the exotoxin 9 levels in CD patients but not in healthy controls, indicating that healthy controls were colonized by non-virulent C. concisus strains. Correlations with the intestinal microbiota found C. concisus levels to correlate with Eubacterium, Subdoligranulum and Blautia, while exotoxin 9 levels correlated with Dialister, Oscillospira, Lachnospira and Prevotella. This suggests that either the composition of the intestinal microbial flora has the ability to influence levels of both virulent and non-virulent C. concisus strains, or infection with C. concisus may modulate the levels of specific bacterial taxa within the gastrointestinal tract.
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Affiliation(s)
- Nadeem O. Kaakoush
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia
| | - Natalia Castaño-Rodríguez
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia
| | - Andrew S. Day
- School of Women's and Children's Health, University of New South Wales, Sydney, Australia
- Department of Paediatrics, University of Otago, Christchurch, New Zealand
- Department of Gastroenterology, Sydney Children's Hospital, Sydney, Australia
| | - Daniel A. Lemberg
- Department of Gastroenterology, Sydney Children's Hospital, Sydney, Australia
| | - Steven T. Leach
- School of Women's and Children's Health, University of New South Wales, Sydney, Australia
| | - Hazel M. Mitchell
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2052, Australia
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Jakubovics NS, Yassin SA, Rickard AH. Community interactions of oral streptococci. ADVANCES IN APPLIED MICROBIOLOGY 2014; 87:43-110. [PMID: 24581389 DOI: 10.1016/b978-0-12-800261-2.00002-5] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
It is now clear that the most common oral diseases, dental caries and periodontitis, are caused by mixed-species communities rather than by individual pathogens working in isolation. Oral streptococci are central to these disease processes since they are frequently the first microorganisms to colonize oral surfaces and they are numerically the dominant microorganisms in the human mouth. Numerous interactions between oral streptococci and other bacteria have been documented. These are thought to be critical for the development of mixed-species oral microbial communities and for the transition from oral health to disease. Recent metagenomic studies are beginning to shed light on the co-occurrence patterns of streptococci with other oral bacteria. Refinements in microscopy techniques and biofilm models are providing detailed insights into the spatial distribution of streptococci in oral biofilms. Targeted genetic manipulation is increasingly being applied for the analysis of specific genes and networks that modulate interspecies interactions. From this work, it is clear that streptococci produce a range of extracellular factors that promote their integration into mixed-species communities and enable them to form social networks with neighboring taxa. These "community integration factors" include coaggregation-mediating adhesins and receptors, small signaling molecules such as peptides or autoinducer-2, bacteriocins, by-products of metabolism including hydrogen peroxide and lactic acid, and a range of extracellular enzymes. Here, we provide an overview of various types of community interactions between oral streptococci and other microorganisms, and we consider the possibilities for the development of new technologies to interfere with these interactions to help control oral biofilms.
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Affiliation(s)
- Nicholas S Jakubovics
- Oral Biology, School of Dental Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom.
| | - Sufian A Yassin
- Oral Biology, School of Dental Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Alexander H Rickard
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, Michigan, USA
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Abstract
Acute apical abscess is the most common form of dental abscess and is caused by infection of the root canal of the tooth. It is usually localized intraorally, but in some cases the apical abscess may spread and result in severe complications or even mortality. The reasons why dental root canal infections can become symptomatic and evolve to severe spreading and sometimes life-threatening abscesses remain elusive. Studies using culture and advanced molecular microbiology methods for microbial identification in apical abscesses have demonstrated a multispecies community conspicuously dominated by anaerobic bacteria. Species/phylotypes commonly found in these infections belong to the genera Fusobacterium, Parvimonas, Prevotella, Porphyromonas, Dialister, Streptococcus, and Treponema. Advances in DNA sequencing technologies and computational biology have substantially enhanced the knowledge of the microbiota associated with acute apical abscesses and shed some light on the etiopathogeny of this disease. Species richness and abundance and the resulting network of interactions among community members may affect the collective pathogenicity and contribute to the development of acute infections. Disease modifiers, including transient or permanent host-related factors, may also influence the development and severity of acute abscesses. This review focuses on the current evidence about the etiology and treatment of acute apical abscesses and how the process is influenced by host-related factors and proposes future directions in research, diagnosis, and therapeutic approaches to deal with this disease.
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Rôças IN, Neves MAS, Provenzano JC, Siqueira JF. Susceptibility of as-yet-uncultivated and difficult-to-culture bacteria to chemomechanical procedures. J Endod 2013; 40:33-7. [PMID: 24331987 DOI: 10.1016/j.joen.2013.07.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 07/28/2013] [Accepted: 07/30/2013] [Indexed: 02/04/2023]
Abstract
INTRODUCTION A significant portion of the bacteria taking part of the microbiome associated with apical periodontitis still remain to be cultivated and phenotypically characterized. This molecular study evaluated the prevalence of selected as-yet-uncultivated and difficult-to-culture bacterial taxa in infected root canals and their susceptibility to chemomechanical procedures. METHODS Root canals of single-rooted teeth with apical periodontitis were prepared using rotary nickel-titanium instruments and 2.5% sodium hypochlorite as the irrigant. DNA extracts from samples taken before (S1) and after (S2) chemomechanical preparation were surveyed for the presence of 7 as-yet-uncultivated phylotypes and 1 difficult-to-culture species using end-point polymerase chain reaction. Samples were also subjected to quantitative analysis of total bacteria and levels of the 2 most prevalent taxa. RESULTS Bacteroidaceae sp. HOT-272 (24%) and Fretibacterium fastidiosum (20%) were the most prevalent taxa in S1. Their mean counts in S1 were 8.25 × 10(3) and 2.13 × 10(3) rRNA gene copies, corresponding to 0.18% and 0.55% of the total bacteria. Chemomechanical debridement promoted a highly statistically significant reduction in total bacterial counts (P < .001), but 64% of the canals were still positive for bacterial presence. Of the target taxa, only Bacteroidaceae sp. HOT-272 and F. fastidiosum were detected in S2 (each one in 1 sample). The reduction in counts of both taxa was also highly significant (P < .001). CONCLUSIONS Findings confirmed that several as-yet-uncultivated and difficult-to-grow bacterial taxa can participate in the microbiome associated with apical periodontitis. Two of them were found in relatively high prevalence but rarely as a dominant species. Chemomechanical procedures were highly effective in completely eliminating these taxa or at least substantially reducing their numbers.
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Affiliation(s)
- Isabela N Rôças
- Department of Endodontics and Molecular Microbiology Laboratory, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Mônica A S Neves
- Department of Endodontics and Molecular Microbiology Laboratory, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil
| | - José C Provenzano
- Department of Endodontics and Molecular Microbiology Laboratory, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil
| | - José F Siqueira
- Department of Endodontics and Molecular Microbiology Laboratory, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil.
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Neves MAS, Rôças IN, Siqueira JF. Clinical antibacterial effectiveness of the self-adjusting file system. Int Endod J 2013; 47:356-65. [DOI: 10.1111/iej.12151] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Accepted: 06/13/2013] [Indexed: 02/03/2023]
Affiliation(s)
- M. A. S. Neves
- Department of Endodontics and Molecular Microbiology Laboratory; Faculty of Dentistry; Estácio de Sá University; Rio de Janeiro RJ Brazil
| | - I. N. Rôças
- Department of Endodontics and Molecular Microbiology Laboratory; Faculty of Dentistry; Estácio de Sá University; Rio de Janeiro RJ Brazil
| | - J. F. Siqueira
- Department of Endodontics and Molecular Microbiology Laboratory; Faculty of Dentistry; Estácio de Sá University; Rio de Janeiro RJ Brazil
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Siqueira JF, Rôças IN. As-yet-uncultivated oral bacteria: breadth and association with oral and extra-oral diseases. J Oral Microbiol 2013; 5:21077. [PMID: 23717756 PMCID: PMC3664057 DOI: 10.3402/jom.v5i0.21077] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2013] [Revised: 05/01/2013] [Accepted: 05/02/2013] [Indexed: 12/19/2022] Open
Abstract
It has been shown that 40–60% of the bacteria found in different healthy and diseased oral sites still remain to be grown in vitro, phenotypically characterized, and formally named as species. The possibility exists that these as-yet-uncultivated bacteria play important ecological roles in oral bacterial communities and may participate in the pathogenesis of several oral infectious diseases. There is also a potential for these as-yet-uncultivated oral bacteria to take part in extra-oral infections. For a comprehensive characterization of physiological and pathogenic properties as well as antimicrobial susceptibility of individual bacterial species, strains need to be grown in pure culture. Advances in culturing techniques have allowed the cultivation of several oral bacterial taxa only previously known by a 16S rRNA gene sequence signature, and novel species have been proposed. There is a growing need for developing improved methods to cultivate and characterize the as-yet-uncultivated portion of the oral microbiome so as to unravel its role in health and disease.
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Affiliation(s)
- José F Siqueira
- Department of Endodontics and Molecular Microbiology Laboratory, Estácio de Sá University, Rio de Janeiro, Brazil
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Heyder M, Kranz S, Völpel A, Pfister W, Watts DC, Jandt KD, Sigusch BW. Antibacterial effect of different root canal sealers on three bacterial species. Dent Mater 2013; 29:542-9. [DOI: 10.1016/j.dental.2013.02.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Accepted: 02/20/2013] [Indexed: 01/22/2023]
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Microbiological profile and antimicrobial susceptibility pattern of infected root canals associated with periapical abscesses. Eur J Clin Microbiol Infect Dis 2012; 32:573-80. [PMID: 23224675 DOI: 10.1007/s10096-012-1777-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2012] [Accepted: 11/04/2012] [Indexed: 10/27/2022]
Abstract
The aim of this investigation was to identify microorganisms from root canals with periapical abscesses and assess the susceptibility of specific anaerobic bacteria to selected antimicrobials and their β-lactamase production. Sixty root canals were microbiologically investigated. The susceptibility of Anaerococcus prevotii, Fusobacterium necrophorum, F. nucleatum, Parvimonas micra, and Prevotella intermedia/nigrescens to antimicrobials was evaluated with the Etest, whereas β-lactamase production was assessed with nitrocefin. A total of 287 different bacterial strains were recovered, including 201 strict anaerobes. The most frequently strict isolated anaerobes were A. prevotii, P. micra, and F. necrophorum. The selected bacteria were susceptible to all the tested antibiotics, except A. prevotii and Fusobacterium species to azithromycin and erythromycin, as well as A. prevotii and F. necrophorum to metronidazole. None of the microorganisms produced β-lactamase. Gram-positive anaerobic bacteria predominated in the root canals with periapical abscesses. All microorganisms tested were susceptible to benzylpenicillin, amoxicillin, amoxicillin + clavulanate, cefaclor, and clindamycin, producing no β-lactamase.
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Nelson-Filho P, Carpio-Horta KO, Andrucioli MCD, Feres M, Bezerra da Silva RA, Garcia Paula-Silva FW, Romano FL. Molecular detection of Aggregatibacter actinomycetemcomitans on metallic brackets by the checkerboard DNA-DNA hybridization technique. Am J Orthod Dentofacial Orthop 2012; 142:481-6. [PMID: 22999671 DOI: 10.1016/j.ajodo.2012.04.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2011] [Revised: 04/01/2012] [Accepted: 04/01/2012] [Indexed: 11/16/2022]
Abstract
INTRODUCTION The purpose of this randomized clinical study was to evaluate the presence of the periodontal pathogen Aggregatibacter actinomycetemcomitans on metallic brackets and the effectiveness of a 0.12% chlorhexidine digluconate mouthwash in inhibiting this microorganism. METHODS The study involved 35 patients of both sexes having orthodontic treatment with fixed appliances between the ages of 14 and 22 years, randomized into 2 groups: experimental (n = 17) and control (n = 18). Two new metallic brackets were placed on the patients' premolars, and the subjects rinsed with a solution of 0.12% chlorhexidine digluconate or a placebo solution twice a week for 30 days. After that, the brackets were removed and underwent microbiologic analysis with the checkerboard DNA-DNA hybridization technique. Data were analyzed by using the Student t, Fisher exact, and Mann-Whitney tests at the significance level of 5%. RESULTS The results showed that A actinomycetemcomitans was present in all brackets from the subjects in the control group vs 83% of the subjects who rinsed with chlorhexidine digluconate (P <0.0001). There were also significantly lower levels of this species in the chlorhexidine digluconate group compared with the control group (P = 0.0003). CONCLUSIONS We concluded that 0.12% chlorhexidine digluconate rinsing, twice a week for 30 days during orthodontic treatment, is effective in reducing the presence and levels of A actinomycetemcomitans on metallic brackets.
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Affiliation(s)
- Paulo Nelson-Filho
- Department of Pediatric Clinics, Preventive and Social Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Brazil.
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