51
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Monaghan L, Jadun S, Darcey J. Endodontic microsurgery. Part one: diagnosis, patient selection and prognoses. Br Dent J 2019; 226:940-948. [PMID: 31253911 DOI: 10.1038/s41415-019-0415-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Historically, surgical endodontics has been viewed as a treatment of last resort, mainly due to poor outcomes as a result of limitations in materials and techniques. Contemporary techniques, modern materials and better visualisation have all led to an improvement in success rates, making endodontic microsurgery a valuable treatment option to certain patients. Such advances, however, are no substitute for skill in endodontic diagnosis and treatment planning, which can often prove challenging. A variety of tools are available to test for fractures and assess both periodontal and pulpal health. More advanced techniques such as cone beam computed tomography are often invaluable in pre-surgical assessment and diagnosis. Once an accurate diagnosis has been established, a favourable prognosis is explicitly linked to careful patient selection. Orthograde treatment, or retreatment, remains the gold standard for the majority of endodontic problems. However, there are a number of indications for surgery where orthograde treatment is either impossible, or less likely to be successful. It is paramount for any clinician undertaking endodontic surgery to have a detailed understanding of the local and systemic factors associated with successful treatment. Whilst there are few absolute medical contraindications, there are a number of conditions which may influence patient management and make treatment more challenging.
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Affiliation(s)
- Liam Monaghan
- University Dental Hospital of Manchester, Orthodontic Department, Higher Cambridge Street, Manchester, UK
| | - Sarah Jadun
- University Dental Hospital of Manchester, Oral Surgery, Higher Cambridge Street, Manchester, UK
| | - James Darcey
- University Dental Hospital of Manchester, Restorative Department, Higher Cambridge Street, Manchester, UK.
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52
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Okamura T, Tamura M, Suguro H, Ohtsu M, Omagari D, Yoshino A, Ogiso B, Asano M. Bactericidal and cytotoxic effects of acid-electrolyzed functional water. J Oral Sci 2019; 61:512-515. [PMID: 31708552 DOI: 10.2334/josnusd.18-0426] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Sodium hypochlorite (NaOCl) is widely used as an antimicrobial irrigant; however, it has cytotoxic and neurotoxic effects. For these reasons, development of new, safe irrigants other than NaOCl is long overdue. In the present study, the antimicrobial and noxious effects of acid-electrolyzed functional water (FW) were evaluated and compared with those of NaOCl. Enterococcus faecalis, Streptococcus mutans, Porphyromonas gingivalis, or Candida albicans were mixed with each tested solution for 30 s. The mixtures were then plated on brain-heart infusion agar plates, after which colony numbers were counted. Serially diluted acid FW was used to determine the actual chloride concentration (ACC) required for a bactericidal effect. Noxious effects were evaluated by measuring lactate dehydrogenase released from HeLa cells. Acid FW and NaOCl had similar bactericidal effects against all bacterial species but not against C. albicans. An ACC of at least 10 ppm was required in order to ensure effective bacteriocidal activity and induce significant lactate dehydrogenase release. Acid FW-treated HeLa cells exhibited healthy growth, with slight retardation as compared with non-treated cells. Because of its efficient bactericidal, and less noxious, effects on human cells, acid FW may be a useful irrigant for effective root canal treatment.
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Affiliation(s)
- Teinosuke Okamura
- Division of Applied Oral Sciences, Nihon University Graduate School of Dentistry.,Department of Endodontics, Nihon University School of Dentistry
| | - Muneaki Tamura
- Department of Microbiology, Nihon University School of Dentistry.,Division of Immunology and Pathobiology, Nihon University School of Dentistry
| | - Hisashi Suguro
- Department of Endodontics, Nihon University School of Dentistry.,Division of Advanced Dental Treatment, Dental Research Center, Nihon University School of Dentistry
| | - Mariko Ohtsu
- Division of Immunology and Pathobiology, Nihon University School of Dentistry.,Department of Pathology, Nihon University School of Dentistry
| | - Daisuke Omagari
- Division of Immunology and Pathobiology, Nihon University School of Dentistry.,Department of Pathology, Nihon University School of Dentistry
| | - Atsuo Yoshino
- Department of Neurological Surgery, Nihon University School of Medicine
| | - Bunnai Ogiso
- Department of Endodontics, Nihon University School of Dentistry.,Division of Advanced Dental Treatment, Dental Research Center, Nihon University School of Dentistry
| | - Masatake Asano
- Division of Immunology and Pathobiology, Nihon University School of Dentistry.,Department of Pathology, Nihon University School of Dentistry
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53
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Jeong S, Lee Y, Yun CH, Park OJ, Han SH. Propionate, together with triple antibiotics, inhibits the growth of Enterococci. J Microbiol 2019; 57:1019-1024. [PMID: 31659687 DOI: 10.1007/s12275-019-9434-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 10/10/2019] [Indexed: 02/07/2023]
Abstract
Enterococci are Gram-positive facultative anaerobic bacteria that colonize the oral cavity and gastrointestinal tract. Enterococcal infections, mainly caused by Enterococcus faecalis and Enterococcus faecium, include apical periodontitis, endocarditis, and bloodstream infections. Recently, vancomycinresistant Enterococci are considered major pathogens that are common but difficult to treat, especially in nosocomial settings. Moreover, E. faecalis is closely associated with recurrent endodontic infections and failed endodontic treatment. In this study, we investigated the effects of short-chain fatty acids (SCFAs), acetate, propionate, and butyrate, which are metabolites fermented by gut microbiota, on the growth of Enterococci. Enterococci were cultured in the presence or absence of acetate, propionate, or butyrate, and the optical density at 600 nm was measured to determine bacterial growth. The minimum inhibitory concentration/minimum bactericidal concentration test was conducted. Bacteria were treated with a SCFA, together with clinically used endodontic treatment methods such as triple antibiotics (metronidazole, minocycline, and ciprofloxacin) and chlorhexidine gluconate (CHX) to determine the effects of combination treatment. Of the SCFAs, propionate had a bacteriostatic effect, inhibiting the growth of E. faecalis in a dose-dependent manner and also that of clinical strains of E. faecalis isolated from dental plaques. Meanwhile, acetate and butyrate had minimal effects on E. faecalis growth. Moreover, propionate inhibited the growth of other Enterococci including E. faecium. In addition, combination treatment of propionate and triple antibiotics led to further growth inhibition, whereas no cooperative effect was observed at propionate plus CHX. These results indicate that propionate attenuates the growth of Enterococci, suggesting propionate as a potential agent to control Enterococcal infections, especially when combined with triple antibiotics.
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Affiliation(s)
- Soyoung Jeong
- Department of Oral Microbiology and Immunology, DRI, and BK21 Plus Program, School of Dentistry, Seoul National University, Seoul, 08826, Republic of Korea
| | - Yunjae Lee
- Department of Oral Microbiology and Immunology, DRI, and BK21 Plus Program, School of Dentistry, Seoul National University, Seoul, 08826, Republic of Korea
- College of Liberal Studies, Seoul National University, Seoul, 08826, Republic of Korea
| | - Cheol-Heui Yun
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea
- Institutes of Green Bio Science and Technology, Seoul National University, Pyeongchang, 25354, Republic of Korea
| | - Ok-Jin Park
- Department of Oral Microbiology and Immunology, DRI, and BK21 Plus Program, School of Dentistry, Seoul National University, Seoul, 08826, Republic of Korea.
| | - Seung Hyun Han
- Department of Oral Microbiology and Immunology, DRI, and BK21 Plus Program, School of Dentistry, Seoul National University, Seoul, 08826, Republic of Korea.
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54
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Šimundić Munitić M, Poklepović Peričić T, Utrobičić A, Bago I, Puljak L. Antimicrobial efficacy of commercially available endodontic bioceramic root canal sealers: A systematic review. PLoS One 2019; 14:e0223575. [PMID: 31622387 PMCID: PMC6797114 DOI: 10.1371/journal.pone.0223575] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Accepted: 09/24/2019] [Indexed: 11/25/2022] Open
Abstract
Background Recently, a new generation of bioceramic root canal sealers has been introduced onto the market. Many in vitro studies have investigated the antimicrobial properties of these sealers, but their comparative efficacy in antimicrobial activity is still unknown. Methodology Three electronic databases were searched: MEDLINE and Embase via the OvidSP platform, and Web of Science, up to June 25, 2019. Studies were included irrespective of study design, type of publication and language. Reporting quality was assessed by two authors independently. Meta-analysis was not performed due to studies being highly heterogeneous. Results We included 37 studies that analysed the antimicrobial effects of bioceramic sealers. Most of them used a planktonic cell model, with the exception of nine studies which used biofilms. It was not possible to make direct comparison of results from studies and to give a clear conclusion about the comparative antimicrobial activity of these materials because the studies used heterogeneous sources and ages of microorganisms, setting and contact times of sealers, and antimicrobial tests. Furthermore, some materials showed completely different results when tested with different methods. Conclusions In conclusion, multiple in vitro studies have shown that bioceramic sealers may have various degrees of antimicrobial activity. However, it is still impossible to make conclusions about their comparative efficacy and to recommend the use of one over another in clinical practice because the studies available were conducted in different ways, which makes meta-analysis futile. A uniform methodological approach, consistent definitions and studies on humans are urgently needed in this field of research so that recommendations for practice can be made.
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Affiliation(s)
- Marija Šimundić Munitić
- Department of Endodontics and Restorative Dentistry, Dental Polyclinic Split; School of Dental Medicine, University of Split, Split, Croatia
- * E-mail:
| | - Tina Poklepović Peričić
- Department of Research in Biomedicine and Health, School of Medicine, University of Split, Split, Croatia
| | - Ana Utrobičić
- Cochrane Croatia, Central Medical Library, School of Medicine, University of Split, Split, Croatia
| | - Ivona Bago
- Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Zagreb, Croatia
| | - Livia Puljak
- Department of Evidence Based Medicine and Health Care, Catholic University of Croatia, Zagreb, Zagreb, Croatia
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55
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De la Torre-Luna R, Domínguez-Pérez RA, Guillén-Nepita AL, Ayala-Herrera JL, Martínez-Martínez RE, Romero-Ayala ME, Pérez-Serrano RM, Vázquez-Garcidueñas MS. Prevalence of Candida albicans in primary endodontic infections associated with a higher frequency of apical periodontitis in type two diabetes mellitus patients. Eur J Clin Microbiol Infect Dis 2019; 39:131-138. [PMID: 31529305 DOI: 10.1007/s10096-019-03702-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Accepted: 09/03/2019] [Indexed: 12/18/2022]
Abstract
To identify the prevalence of C. albicans in primary endodontic infections of type two diabetes mellitus (T2DM) patients and compare their clinical and radiographical characteristics with a non-diabetic control group, establishing the possible relationship between primary endodontic infection, T2DM, and C. albicans, since diabetes mellitus (DM), influences the development, course, and response to the treatment of apical periodontitis, but the presence of Candida albicans (C. albicans) has not been considered before. A total of 120 patients were selected and divided into two groups: 60 T2DM diagnosed patients and 60 non-diabetic controls. A clinical examination and radiographic analysis were performed to establish a periapical index score (PAI). Root canal samples were taken. Deoxyribonucleic acid (DNA) was extracted, and specific primers were used to identify C. albicans by polymerase chain reaction (PCR). A twofold increase in the prevalence of C. albicans in T2DM patients was observed in contrast to control patients (p = 0.0251). Sixty-five percent of T2DM patients with positive C. albicans scored a ≥ 3 PAI, while only 27% of the patients without C. albicans had a ≥ 3 PAI score (p = 0.0065). Long-term DM patients presented C. albicans more frequently (p < 0.0001). In this study, long-term T2DM patients carried C. albicans in their root canals more frequently when having a primary endodontic infection. Furthermore, this C. albicans presence seems to be related to a higher frequency of apical periodontitis.
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Affiliation(s)
- Rocio De la Torre-Luna
- Laboratorio de Investigación Odontológica Multidisciplinaria. Facultad de Medicina, Universidad Autónoma de Querétaro, Clavel #200, Prados de La Capilla, 76176, Santiago de Queretaro, QRO, México.,Endodontic Specialization Program, Facultad de Medicina, Universidad Autónoma de Querétaro, Santiago de Queretaro, México
| | - Rubén Abraham Domínguez-Pérez
- Laboratorio de Investigación Odontológica Multidisciplinaria. Facultad de Medicina, Universidad Autónoma de Querétaro, Clavel #200, Prados de La Capilla, 76176, Santiago de Queretaro, QRO, México. .,Endodontic Specialization Program, Facultad de Medicina, Universidad Autónoma de Querétaro, Santiago de Queretaro, México.
| | - Ana Laura Guillén-Nepita
- División de Estudios de Posgrado de la Facultad de Ciencias Médicas y Biológicas "Dr. Ignacio Chávez", Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México
| | | | - Rita Elizabeth Martínez-Martínez
- Departamento de Investigación de la Maestría en Ciencias Odontológicas, Universidad Autónoma de San Luis Potosí, San Luis Potosi, México
| | - Ma Esther Romero-Ayala
- Centro Universitario de Estudios de Posgrado e Investigación, Facultad de Odontología, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, México
| | - Rosa Martha Pérez-Serrano
- Laboratorio de Investigación Odontológica Multidisciplinaria. Facultad de Medicina, Universidad Autónoma de Querétaro, Clavel #200, Prados de La Capilla, 76176, Santiago de Queretaro, QRO, México.,Endodontic Specialization Program, Facultad de Medicina, Universidad Autónoma de Querétaro, Santiago de Queretaro, México
| | - Ma Soledad Vázquez-Garcidueñas
- División de Estudios de Posgrado de la Facultad de Ciencias Médicas y Biológicas "Dr. Ignacio Chávez", Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México
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56
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Kalaiselvam R, Soundararajan K, Rajan R M, Deivanayagam K, Arumugam C, Ganesh A. Comparative Evaluation of the Anti-bacterial Efficacy of Herbal Medicaments and Synthetic Medicaments Against Enterococcus faecalis using Real-time Polymerase Chain Reaction. Cureus 2019; 11:e5228. [PMID: 31565629 PMCID: PMC6758972 DOI: 10.7759/cureus.5228] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Periradicular bacterial infections are the proven cause of the failure of endodontic treatment. When the pulp canal gets infected or becomes necrotic, bacterial growth takes place in the form of biofilms and aggregates. During the endodontic procedure, bacterial colonies are disrupted, and the microbial load is reduced by biomechanical preparation, cleaning with anti-microbial solutions, and placing anti-bacterial medicaments in the root canal. These anti-microbial substances are synthetic, having a cytotoxicity effect. In recent times, herbal medicines are an alternative medicine being used increasingly as an intra-canal medicament to fight or prevent common endodontic infections. Aim The objective of this study is to compare the anti-bacterial efficacy of herbal medicaments and synthetic medicaments against Enterococcus faecalis (E. faecalis). Materials and methods This was an in-vitro study in which a total of 60 teeth specimens (n=60) were inoculated with E. faecalis for 21 days. Specimens were divided into six groups (Group 1: Piper nigrum (Piperaceae); Group 2: Piper longum (Piperaceae); Group 3: Zingiber officinale Roscoe (Zingiberaceae); Group 4: Calcium hydroxide; Group 5: 2% chlorhexidine gel (CHX); and Group 6: saline (negative control). The intra-canal medicaments were packed inside the tooth. After five days, the remaining microbial load was determined by using real-time PCR. Results The threshold cycle (Ct) values of Piper nigrum, Piper longum, dried ginger extract, 2% CHX, calcium hydroxide, and saline were found to be 21.36, 20.55, 22.14, 22.51, 23.62, and 17.81, respectively. The obtained mean bacterial load of these products was 8.64, 12.52, 7.23, 0.82, 0.14, and 149.49, respectively. Conclusion Two percent CHX showed high antibacterial activity against E. faecalis followed by calcium hydroxide, Zingiber officinale Roscoe, Piper nigrum, Piper longum, and saline.
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Affiliation(s)
- Rajeswari Kalaiselvam
- Conservative Dentistry and Endodontics, Faculty of Dental Sciences, Sri Ramachandra University, Chennai, IND
| | - Karthick Soundararajan
- Conservative Dentistry and Endodontics, Faculty of Dental Sciences, Sri Ramachandra University, Chennai, IND
| | - Mathan Rajan R
- Conservative Dentistry and Endodontics, Faculty of Dental Sciences, Sri Ramachandra University, Chennai, IND
| | - Kandaswamy Deivanayagam
- Conservative Dentistry and Endodontics, Faculty of Dental Sciences, Sri Ramachandra University, Chennai, IND
| | - Chakravarthy Arumugam
- Conservative Dentistry and Endodontics, Faculty of Dental Sciences, Sri Ramachandra University, Chennai, IND
| | - Arathi Ganesh
- Conservative Dentistry and Endodontics, Faculty of Dental Sciences, Sri Ramachandra University, Chennai, IND
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57
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Neves SO, Magalhães LMD, Corrêa JD, Dutra WO, Gollob KJ, Silva TA, Horta MCR, Souza PEA. Composite-derived monomers affect cell viability and cytokine expression in human leukocytes stimulated with Porphyromonas gingivalis. J Appl Oral Sci 2019; 27:e20180529. [PMID: 31166413 PMCID: PMC6546269 DOI: 10.1590/1678-7757-2018-0529] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 12/09/2018] [Accepted: 12/30/2018] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVES Dental composites release unreacted resin monomers into the oral environment, even after polymerization. Periodontal cells are, therefore, exposed to substances that potentially elicit the immune inflammatory response. The underlying molecular mechanisms associated with the interaction between resin monomers and human immune cells found in the gingival crevicular fluid are not fully understood yet. This study investigated the ability of bisphenol A-glycidyl methacrylate (BISGMA), urethane dimethacrylate (UDMA) and triethylene glycol dimethacrylate (TEGDMA) to induce apoptosis and cytokine release by human leukocytes stimulated with a periodontal pathogen. METHODOLOGY Peripheral blood mononuclear cells (PBMC) from 16 healthy individuals were included in this study. To determine the toxicity, the PBMC were incubated for 20 hours, with monomers, for the analysis of cell viability using MTT assay. To evaluate cell death in the populations of monocytes and lymphocytes, they were exposed to sub-lethal doses of each monomer and of heat-inactivated Porphyromonas gingivalis (P. gingivalis) for 5 hours. Secretions of IL-1β, IL-6, IL-10 and TNF-α were determined by ELISA after 20 hours. RESULTS UDMA and TEGDMA induced apoptosis after a short-time exposure. Bacterial challenge induced significant production of IL-1β and TNF-α (p<0.05). TEGDMA reduced the bacterial-induced release of IL-1β and TNF-α, whereas UDMA reduced IL-1β release (p<0.05). These monomers did not affect IL-10 and IL-6 secretion. BISGMA did not significantly interfere in cytokine release. CONCLUSIONS These results show that resin monomers are toxic to PBMC in a dose-dependent manner, and may influence the local immune inflammatory response and tissue damage mechanisms via regulation of bacterial-induced IL-1β and TNF-α secretion by PBMC.
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Affiliation(s)
- Sheyla Omonte Neves
- Pontifícia Universidade Católica de Minas Gerais, Departamento de Odontologia, Programa de Pós-graduação em Odontologia, Belo Horizonte, Minas Gerais, Brasil
| | - Luísa Mourão Dias Magalhães
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departmento de Morfologia, Belo Horizonte, Minas Gerais, Brasil
| | - Jôice Dias Corrêa
- Pontifícia Universidade Católica de Minas Gerais, Departamento de Odontologia, Programa de Pós-graduação em Odontologia, Belo Horizonte, Minas Gerais, Brasil
- Universidade Federal de Minas Gerais, Faculdade de Odontologia, Belo Horizonte, Minas Gerais, Brasil
| | - Walderez Ornelas Dutra
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departmento de Morfologia, Belo Horizonte, Minas Gerais, Brasil
- Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais – INCT-DT, Belo Horizonte, Minas Gerais, Brasil
| | - Kenneth John Gollob
- International Research Center, A.C.Camargo Cancer Center, São Paulo, SP, Brasil
- Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais – INCT-DT, Belo Horizonte, Minas Gerais, Brasil
| | - Tarcília Aparecida Silva
- Universidade Federal de Minas Gerais, Faculdade de Odontologia, Belo Horizonte, Minas Gerais, Brasil
| | - Martinho Campolina Rebello Horta
- Pontifícia Universidade Católica de Minas Gerais, Departamento de Odontologia, Programa de Pós-graduação em Odontologia, Belo Horizonte, Minas Gerais, Brasil
| | - Paulo Eduardo Alencar Souza
- Pontifícia Universidade Católica de Minas Gerais, Departamento de Odontologia, Programa de Pós-graduação em Odontologia, Belo Horizonte, Minas Gerais, Brasil
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58
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Lane J, Bonsor S. Survival rates of teeth treated with bacterial photo-dynamic therapy during disinfection of the root canal system. Br Dent J 2019; 226:333-339. [DOI: 10.1038/s41415-019-0026-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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59
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YU MK, KIM MA, ROSA V, HWANG YC, DEL FABBRO M, SOHN WJ, MIN KS. Role of extracellular DNA in Enterococcus faecalis biofilm formation and its susceptibility to sodium hypochlorite. J Appl Oral Sci 2019; 27:e20180699. [PMID: 31411265 PMCID: PMC9648955 DOI: 10.1590/1678-7757-2018-0699] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 03/25/2019] [Indexed: 12/04/2022] Open
Abstract
Objective This study investigated the role of extracellular deoxyribonucleic acid (eDNA) on Enterococcus faecalis ( E. faecalis ) biofilm and the susceptibility of E. faecalis to sodium hypochlorite (NaOCl). Methodology E. faecalis biofilm was formed in bovine tooth specimens and the biofilm was cultured with or without deoxyribonuclease (DNase), an inhibitor of eDNA. Then, the role of eDNA in E. faecalis growth and biofilm formation was investigated using colony forming unit (CFUs) counting, eDNA level assay, crystal violet staining, confocal laser scanning microscopy, and scanning electron microscopy. The susceptibility of E. faecalis biofilm to low (0.5%) or high (5%) NaOCl concentrations was also analyzed by CFU counting. Results CFUs and biofilm formation decreased significantly with DNase treatment (p<0.05). The microstructure of DNase-treated biofilms exhibited less structured features when compared to the control. The volume of exopolysaccharides in the DNase-treated biofilm was significantly lower than that of control (p<0.05). Moreover, the CFUs, eDNA level, biofilm formation, and exopolysaccharides volume were lower when the biofilm was treated with DNase de novo when compared to when DNase was applied to matured biofilm (p<0.05). E. faecalis in the biofilm was more susceptible to NaOCl when it was cultured with DNase (p<0.05). Furthermore, 0.5% NaOCl combined with DNase treatment was as efficient as 5% NaOCl alone regarding susceptibility (p>0.05). Conclusions Inhibition of eDNA leads to decrease of E. faecalis biofilm formation and increase of susceptibility of E. faecalis to NaOCl even at low concentrations. Therefore, our results suggest that inhibition of eDNA would be beneficial in facilitating the efficacy of NaOCl and reducing its concentration.
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Affiliation(s)
- Mi-Kyung YU
- Chonbuk National University, Korea; Chonbuk National University, Korea; Chonbuk National University Hospital, Korea
| | | | | | | | - Massimo DEL FABBRO
- Università degli Studi di Milano, Italy; IRCCS Istituto Ortopedico Galeazzi, Italy
| | | | - Kyung-San MIN
- Chonbuk National University, Korea; Chonbuk National University, Korea; Chonbuk National University Hospital, Korea
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60
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Chen E, Bakr MM, Firth N, Love RM. Inflammatory cell expression of Toll-like receptor-2 (TLR2) within refractory periapical granuloma. F1000Res 2018; 7:1819. [PMID: 30631444 PMCID: PMC6281009 DOI: 10.12688/f1000research.16678.1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/01/2018] [Indexed: 12/20/2022] Open
Abstract
Background: Toll-like receptor-2 (TLR2) is highly important within the immune system. Characterization of the expression of TLR2 within inflammatory cells in periapical lesions could help in diagnosis and management of refractory cases. The aim of the study is identification of Toll-like receptor (TLR2) through immunohistochemical and immunofluroscence expression in inflammatory cells within refractory periapical granuloma cases. Methods: Eight cases of refractory periapical granuloma were selected out of 772 cases. Histological examination and immunohistochemical staining with polyclonal rabbit antihuman TLR2, monoclonal mouse antihuman CD38, CD68 and CD83 primary antibodies, as well as immunofluorescence staining with goat anti-rabbit TLR2, donkey anti-mouse CD38, CD68 and CD83 primary antibodies was conducted. Positive controls, negative controls and experimental sections with no primary antibody were included in the study. Qualitative analysis and double immunofluorescence technique was used to characterize the TLR + cells. Results: In periapical granuloma, lymphocytes (CD38 cells) expressed the most amount of TLR reactivity followed by macrophages (CD68 cells), and odontogenic epithelial cells. Neutrophils, red blood cells (RBCs) and collagen ground substance were negative to TLR2. Conclusion: TLR2 was highly expressed by lymphocytes and plasma cells indicative of their major role in the inflammatory process and antigen recognition in refractory periapical granuloma. Dendritic cells expressing TLR2 were low in number suggesting a minor role in sustaining these lesions.
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Affiliation(s)
- Eric Chen
- School of Dentistry, University of Otago, North Dunedin, Dunedin, 9016, New Zealand
| | - Mahmoud M. Bakr
- School of Dentistry and Oral Health, Griffith University, Southport, Queensland, 4215, Australia
| | - Norman Firth
- School of Dentistry, The University of Queensland, Herston, Queensland, 4006, Australia
| | - Robert M. Love
- School of Dentistry, University of Otago, North Dunedin, Dunedin, 9016, New Zealand
- School of Dentistry and Oral Health, Griffith University, Southport, Queensland, 4215, Australia
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61
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Francisco PA, Delboni MG, Lima AR, Xiao Y, Siqueira WL, Gomes BPFA. Proteomic profile of root canal contents in teeth with post-treatment endodontic disease. Int Endod J 2018; 52:451-460. [DOI: 10.1111/iej.13021] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Accepted: 09/30/2018] [Indexed: 02/01/2023]
Affiliation(s)
- P. A. Francisco
- Department of Restorative Dentistry; Endodontic Division; Piracicaba Dental School; State University of Campinas; Piracicaba São Paulo Brazil
- Department of Biochemistry; Schulich School of Medicine & Dentistry; University of Western Ontario; London Ontario Canada
| | - M. G. Delboni
- Department of Restorative Dentistry; Endodontic Division; Piracicaba Dental School; State University of Campinas; Piracicaba São Paulo Brazil
- College of Dentistry; DeVry Facid University; Teresina Piauí Brazil
| | - A. R. Lima
- Department of Restorative Dentistry; Endodontic Division; Piracicaba Dental School; State University of Campinas; Piracicaba São Paulo Brazil
| | - Y. Xiao
- Department of Biochemistry; Schulich School of Medicine & Dentistry; University of Western Ontario; London Ontario Canada
| | - W. L. Siqueira
- Department of Biochemistry; Schulich School of Medicine & Dentistry; University of Western Ontario; London Ontario Canada
| | - B. P. F. A. Gomes
- Department of Restorative Dentistry; Endodontic Division; Piracicaba Dental School; State University of Campinas; Piracicaba São Paulo Brazil
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Prevalence of Candida Species in Endodontic Infections: Systematic Review and Meta-analysis. J Endod 2018; 44:1616-1625.e9. [PMID: 30241680 DOI: 10.1016/j.joen.2018.07.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 07/16/2018] [Accepted: 07/19/2018] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Candida in endodontic infections has been investigated in a large number of studies, but its role as an endodontic pathogen is still debatable. The aim of this study was to systematically review the literature on the prevalence of Candida species in root canal infections. METHODS Extensive literature research was performed in the most important electronic biomedical databases, and additional studies have been identified from references from relevant articles. Studies were critically appraised using a modified version of the Joanna Briggs Institute Critical Appraisal Checklist. RESULTS From 2225 unique records, 2118 were excluded on the basis of title and abstract. Of the remaining 107 studies, 50 were excluded after full-text review, and 57 were included for qualitative and quantitative analysis. The overall prevalence of Candida spp. in root canal infections was 8.20% (95% confidence interval, 5.56%-11.21%). Candida albicans was the most frequently isolated species. Significant heterogeneity among studies was observed (P < .001, I2 = 86.07%). Subgroup analyses revealed a higher prevalence of Candida spp. from African samples. All studies considered, a high or unclear risk of bias was prevalent regarding 6 out of the 8 items considered in the critical appraisal. CONCLUSIONS Candida spp. occurred in a small proportion of root canal infections. Further and better designed research is needed to investigate the real contribution of Candida spp. to the microbial ecology in infected root canals.
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Parhizkar A, Nojehdehian H, Asgary S. Triple antibiotic paste: momentous roles and applications in endodontics: a review. Restor Dent Endod 2018; 43:e28. [PMID: 30135847 PMCID: PMC6103545 DOI: 10.5395/rde.2018.43.e28] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 04/10/2018] [Indexed: 12/23/2022] Open
Abstract
This study investigated the latest findings and notions regarding ‘triple antibiotic paste’ (TAP) and its applications in dentistry, particularly endodontics. TAP is a combination of 3 antibiotics, ciprofloxacin, metronidazole, and minocycline. Despite the problems and pitfalls research pertaining to this paste has unveiled, it has been vastly used in endodontic treatments. The paste's applications vary, from vital pulp therapy to the recently introduced regeneration and revascularisation protocol. Studies have shown that the paste can eliminate the root canal microorganisms and prepare an appropriate matrix for further treatments. This combination is able to remove diverse groups of obligate and facultative gram-positive and gram-negative bacteria, providing an environment for healing. In regeneration protocol cases, this allows the development, disinfection, and possible sterilization of the root canal system, so that new tissue can infiltrate and grow into the radicular area. Moreover, TAP is capable of creating a discipline in which other wanted and needed treatments can be successfully performed. In conclusion, TAP, as an antibacterial intracanal medication, has diverse uses. Nevertheless, despite its positive effects, the paste has shown drawbacks. Further research concerning the combined paste and other intracanal medications to control microbiota is a must.
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Affiliation(s)
- Ardavan Parhizkar
- Department of Dental Biomaterials, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hanieh Nojehdehian
- Department of Dental Biomaterials, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Saeed Asgary
- Iranian Center for Endodontic Research, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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64
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İriboz E, Arıcan Öztürk B, Kolukırık M, Karacan İ, Sazak Öveçoğlu H. Detection of the unknown components of the oral microflora of teeth with periapical radiolucencies in a Turkish population using next-generation sequencing techniques. Int Endod J 2018; 51:1349-1357. [DOI: 10.1111/iej.12956] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Accepted: 05/29/2018] [Indexed: 01/05/2023]
Affiliation(s)
- E. İriboz
- Department of Endodontics; Faculty of Dentistry; Marmara University; Maltepe İstanbul, Turkey
| | - B. Arıcan Öztürk
- Department of Endodontics; Faculty of Dentistry; Marmara University; Maltepe İstanbul, Turkey
| | - M. Kolukırık
- Department of Endodontics; Faculty of Dentistry; Marmara University; Maltepe İstanbul, Turkey
| | - İ. Karacan
- Department of Endodontics; Faculty of Dentistry; Marmara University; Maltepe İstanbul, Turkey
| | - H. Sazak Öveçoğlu
- Department of Endodontics; Faculty of Dentistry; Marmara University; Maltepe İstanbul, Turkey
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65
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Bernal-Treviño A, González-Amaro AM, Méndez González V, Pozos-Guillen A. [Frequency of Candida in root canals of teeth with primary and persistent endodontic infections]. Rev Iberoam Micol 2018; 35:78-82. [PMID: 29605495 DOI: 10.1016/j.riam.2017.09.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Revised: 04/12/2017] [Accepted: 09/06/2017] [Indexed: 10/17/2022] Open
Abstract
BACKGROUND Microbiological identification in endodontic infections has focused mainly on bacteria without giving much attention to yeasts, which, due to their virulence factors, can affect the outcomes of root canal treatment. AIMS To determine the frequency of Candida in anaerobic conditions in root canals with primary and persistent endodontic infection, as well as to evaluate a microbiological sampling method using aspiration compared to the traditional absorption method with paper points. METHODS Fifty microbiological samples were obtained from teeth of 47 patients requiring endodontic treatments, due to either primary or persistent infections. Two microbiological sampling methods were used: an aspiration method, and the traditional paper point absorption method. In each of these methods, two types of medium were used (M1-M4). Samples were cultured under anaerobic conditions until reaching 0.5 McFarland turbidity, and then inoculated on Sabouraud dextrose, as well as on anaerobic enriched blood agar plates. Macroscopic and microscopic observations of the colonies were performed. The germ-tube test, growth on CHROMagar, and biochemical identification were performed on the isolated yeasts. RESULTS Fungal infection was found in 18 (36%) samples out of the 50 teeth evaluated. In the 18 samples positive for fungal infection, 15 out of 36 (41.6%) teeth were taken from a primary infection, and 3 out of 14 (21.4%) from a persistent infection. The aspiration method using Sabouraud dextrose medium recovered a greater diversity of species. CONCLUSIONS Yeasts frequency was higher in teeth with primary infections compared to teeth with persistent infections. The predominant yeast species was Candida albicans. The aspirating sampling method was more efficient in the recovery of Candida isolates than the traditional absorption method.
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Affiliation(s)
| | - Ana María González-Amaro
- Maestría en Endodoncia, Facultad de Estomatología, Universidad Autónoma de San Luis Potosí, San Luis Potosí, México
| | - Verónica Méndez González
- Maestría en Endodoncia, Facultad de Estomatología, Universidad Autónoma de San Luis Potosí, San Luis Potosí, México
| | - Amaury Pozos-Guillen
- Laboratorio de Ciencias Básicas, Facultad de Estomatología, Universidad Autónoma de San Luis Potosí, San Luis Potosí, México.
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66
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Plutzer B, Zilm P, Ratnayake J, Cathro P. Comparative efficacy of endodontic medicaments and sodium hypochlorite againstEnterococcus faecalisbiofilms. Aust Dent J 2018; 63:208-216. [DOI: 10.1111/adj.12580] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/04/2017] [Indexed: 11/28/2022]
Affiliation(s)
- B Plutzer
- School of Dentistry; Faculty of Health Science; The University of Adelaide; Adelaide South Australia Australia
| | - P Zilm
- School of Dentistry; Faculty of Health Science; The University of Adelaide; Adelaide South Australia Australia
| | - J Ratnayake
- University of Otago; Faculty of Dentistry; Dunedin Otago New Zealand
| | - P Cathro
- School of Dentistry; Faculty of Health Science; The University of Adelaide; Adelaide South Australia Australia
- University of Otago; Faculty of Dentistry; Dunedin Otago New Zealand
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67
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Stenhouse M, Zilm P, Ratnayake J, Cathro P. Investigation of the effect of rapid and slow external pH increases on Enterococcus faecalis biofilm grown on dentine. Aust Dent J 2018; 63:224-230. [PMID: 29327470 DOI: 10.1111/adj.12582] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/29/2017] [Indexed: 11/28/2022]
Abstract
BACKGROUND Calcium hydroxide is a common endodontic medicament and has an antimicrobial effect by increasing the localized pH within the root canal. However, Enterococcus faecalis has shown some resistance to calcium hydroxide. METHODS A flow cell apparatus was used to grow an E. faecalis biofilm on dentine discs. Following 4 weeks growth in Todd Hewitt Broth, flow cells were exposed to either a rapid or slow increase to pH 11.5 or 12.5. Cellular viability was determined using serial plating and the number of colony-forming units was normalized against the cellular protein content. Scanning electron microscopy was carried out to qualitatively observe the effects of the different rates of pH increase. RESULTS A significant difference in viability between the pH rapid and slow groups was not shown in this study. Compared with pH 11.5 solutions, pH 12.5 solutions were more effective at killing bacteria although some E. faecalis still survived. CONCLUSIONS Enterococcus faecalis did not adapt and develop a greater resistance to high pH following a slow rise in pH compared with a rapid rise in pH. As expected, pH 12.5 was more effective in reducing bacterial numbers compared with pH 11.5 although E. faecalis was not completely eliminated.
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Affiliation(s)
- M Stenhouse
- Adelaide Dental School, Faculty of Health and Medical Science, The University of Adelaide, Adelaide, South Australia, Australia
| | - P Zilm
- Adelaide Dental School, Faculty of Health and Medical Science, The University of Adelaide, Adelaide, South Australia, Australia
| | - J Ratnayake
- Faculty of Dentistry, Dunedin, Otago, Australia
| | - P Cathro
- Adelaide Dental School, Faculty of Health and Medical Science, The University of Adelaide, Adelaide, South Australia, Australia.,Faculty of Dentistry, Dunedin, Otago, Australia
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68
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Moradi F, Haghgoo R. Evaluation of Antimicrobial Efficacy of Nanosilver Solution, Sodium Hypochlorite and Normal Saline in Root Canal Irrigation of Primary Teeth. Contemp Clin Dent 2018; 9:S227-S232. [PMID: 30294149 PMCID: PMC6169276 DOI: 10.4103/ccd.ccd_95_18] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Background: Bacteria are the main etiological factors in the development of dentinal caries and its progression to pulpal and periapical disease. Enterococcus faecalis is the bacterial species most frequently recovered from the root-filled teeth. Aim: This study aimed to evaluate the antimicrobial effectiveness of nanosilver (NS) solution as an endodontic irrigation solution of primary teeth against E. faecalis. Settings and Design: Thirty-six canals of primary teeth were selected for this ex vivo study. Methods and Materials: Thirty-six canals of primary teeth were prepared up to the file #35 and all of the specimens were sterilized. Then, root canals were inoculated with a suspension containing E. faecalis bacteria. The teeth were then randomly divided into three groups. Antimicrobial effectiveness was evaluated immediately after dividing into groups by counting colony-forming units on brain heart infusion broth plates. Statistical Analysis: Data were analyzed using Kolmogorov–Smirnov, Welch, and Dunnett's T3 tests. Results: Sodium hypochlorite showed the highest antimicrobial effectiveness against E. faecalis and showed significant differences compared with normal saline and NS solution (P < 0.001). Conclusion: Based on the results of this study, solution of NS particles can be used as an alternative to other root canal irrigating solutions.
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Affiliation(s)
- Farasat Moradi
- Department of Pediatric, Faculty of Dentistry, Shahed University, Tehran, Iran
| | - Roza Haghgoo
- Department of Pediatric, Faculty of Dentistry, Shahed University, Tehran, Iran
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69
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Bahrololoomi Z, Poursina F, Birang R, Foroughi E, Yousefshahi H. The Effect of Er:YAG Laser on Entroccocus faecalis Bacterium in the Pulpectomy of Anterior Primary Teeth. J Lasers Med Sci 2017; 8:166-171. [PMID: 29071021 DOI: 10.15171/jlms.2017.30] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Introduction: Successful root canal therapy depends on the complete elimination of microorganisms such as Entroccocus faecalis, which is impossible to achieve with the traditional methods. Lasers are recently introduced as a new method to solve the problem. The present study is planned and performed to examining the antibacterial effect of Er: YAG laser. Methods: Sixty extracted anterior primary teeth were prepared and sterilized. E. faecalis bacterium was cultured in canals. Samples were randomly divided into two groups. The first group was disinfected by NaOCl 5/25% and Er: YAG laser and the second group just by NaOCl 5/25%. Samples of canal contents were cultured and colony counts were calculated. The results were analyzed statistically by SPSS software and Mann Whitney test. Results: There was no significant difference between colony counts in both groups (P=0.142). But the number of colonies in the first group was lower than in the second group. Conclusion: Although, Er: YAG laser cannot completely eliminate E. faecalis bacterium, its simultaneous use with NaOCl decreases E. faecalis.
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Affiliation(s)
- Zahra Bahrololoomi
- Department of Pediatric Dentistry, Faculty of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Farkhondeh Poursina
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Reza Birang
- Periodontology Department, Dental Faculty, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Elnaz Foroughi
- Department of Pediatric Dentistry Faculty of Dentistry, Arak University of Medical Sciences, Arak, Iran
| | - Hazhir Yousefshahi
- Students Research Center, Dental Faculty, Isfahan University of Medical Sciences, Isfahan, Iran
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70
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Mohmmed SA, Vianna ME, Penny MR, Hilton ST, Knowles JC. The effect of sodium hypochlorite concentration and irrigation needle extension on biofilm removal from a simulated root canal model. AUST ENDOD J 2017; 43:102-109. [PMID: 28508523 DOI: 10.1111/aej.12203] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/02/2017] [Indexed: 11/29/2022]
Abstract
To investigate the effect of sodium hypochlorite concentration and needle extension on removal of Enterococcus faecalis biofilm, sixty root canal models were 3D printed. Biofilms were grown on the apical 3 mm of the canal for 10 days. Irrigation for 60s with 9 mL of either 5.25% or 2.5% NaOCl or water was performed using a needle inserted either 3 or 2 mm from the canal terminus and imaged using fluorescence microscopy and residual biofilm percentages were calculated using imaging software. The data were analysed using analysis of covariance and two-sample t-tests. A significance level of 0.05 was used throughout. Residual biofilm was less using 5.25% than with 2.5% NaOCl. Statistically significant biofilm removal was evident with the needle placed closer to the canal terminus. A greater reduction of available chlorine and pH was noted as the concentration increased. One-minute irrigation was not sufficient for complete biofilm removal.
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Affiliation(s)
- Saifalarab A Mohmmed
- Division of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, University College London, London, UK
| | - Morgana E Vianna
- School of Dentistry, College of Biomedical and Lifesciences, Cardiff University, Cardiff, UK
| | - Matthew R Penny
- School of Pharmacy, Faculty of Life Sciences, University College London, London, UK
| | - Stephen T Hilton
- School of Pharmacy, Faculty of Life Sciences, University College London, London, UK
| | - Jonathan C Knowles
- Division of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, University College London, London, UK
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71
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Ahangari Z, Mojtahed Bidabadi M, Asnaashari M, Rahmati A, Tabatabaei FS. Comparison of the Antimicrobial Efficacy of Calcium Hydroxide and Photodynamic Therapy Against Enterococcus faecalis and Candida albicans in Teeth With Periapical Lesions; An In Vivo Study. J Lasers Med Sci 2017; 8:72-78. [PMID: 28652899 DOI: 10.15171/jlms.2017.13] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Introduction: Elimination of pathological microflora of root canal systems is a major goal in endodontic treatment. This study aimed to compare the antimicrobial efficacy of calcium hydroxide as an intracanal medication and antibacterial photodynamic therapy (aPDT) against Enterococcus faecalis and Candida albicans in teeth with periapical (PA) lesions. Methods: This in vivo study was conducted on 20 patients with single-rooted mandibular premolar with previously failed endodontic treatment. This study was performed as a clinical trial (IRCTID: IRCT2016090429686N1). After conventional chemo-mechanical root canal preparation (hand and rotary instruments and 2.5% NaOCl), microbiological samples were obtained using sterile paper points, then stored in thioglycolate solution and transferred to a microbiology laboratory. Group 1 (n = 10) specimens underwent aPDT (diode laser 808 nm + 50 mg/mL methylene blue), while creamy calcium hydroxide paste was used in group 2 for a duration of 1 week. A control sample was taken with sterile paper points and F3 Protaper rotary file. The samples were dispersed in transport medium, serially diluted, and cultured on selective mediums to determine the number of colony forming units (CFUs). Data were analyzed by Mann-Whitney U test at 5% significance level. The significance level for all analyses was set at P < 0.05. Results: Number of CFU significantly decreased in both groups after the interventions (P < 0.001); however, there was no significant difference in the colony count between the 2 groups. Conclusion: aPDT and calcium hydroxide therapy showed the same antimicrobial efficacy on E. faecalis and C. albicans.
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Affiliation(s)
- Zohre Ahangari
- Endodontic Department, School of Dentistry, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Maryam Mojtahed Bidabadi
- Endodontic Department, School of Dentistry, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Mohammad Asnaashari
- Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Afsaneh Rahmati
- Endodontic Department, School of Dentistry, Hamedan University of Medical Science, Hamedan, Iran
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72
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Asnaashari M, Ashraf H, Rahmati A, Amini N. A comparison between effect of photodynamic therapy by LED and calcium hydroxide therapy for root canal disinfection against Enterococcus faecalis : A randomized controlled trial. Photodiagnosis Photodyn Ther 2017; 17:226-232. [DOI: 10.1016/j.pdpdt.2016.12.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 12/08/2016] [Accepted: 12/24/2016] [Indexed: 10/20/2022]
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73
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Kim SW, Shin DH. Antibacterial effect of urushiol on E. faecalis as a root canal irrigant. Restor Dent Endod 2017; 42:54-59. [PMID: 28194365 PMCID: PMC5299756 DOI: 10.5395/rde.2017.42.1.54] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 01/17/2017] [Indexed: 11/30/2022] Open
Abstract
Objectives The purpose of this study was to compare the antibacterial activity of urushiol against Enterococcus faecalis (E. faecalis) to that of NaOCl. Materials and Methods The canals of thirty two single rooted human teeth were instrumented with Ni-Ti files (ProTaper Next X1, X2, X3, Dentsply). A pure culture of E. faecalis ATCC 19433 was prepared in sterile brain heart infusion (BHI) broth. The teeth were submerged in the suspension of E. faecalis and were incubated at 37℃ for 7 days to allow biofilm formation. The teeth were randomly divided into three experimental groups according to the irrigant used, and a negative control group where no irrigant was used (n = 8). Group 1 used physiologic normal saline, group 2 used 6% NaOCl, and group 3 used 10 wt% urushiol solution. After canal irrigation, each sample was collected by the sequential placement of 2 sterile paper points (ProTaper NEXT paper points, size X3, Dentsply). Ten-fold serial dilutions on each vials, and 100 µL were cultured on a BHI agar plate for 8 hours, and colony forming unit (CFU) analysis was done. The data were statistically analyzed using Kruskal-Wallis and Mann-whitney U tests. Results Saline group exhibited no difference in the CFU counts with control group, while NaOCl and urushiol groups showed significantly less CFU counts than saline and control groups (p < 0.05). Conclusions The result of this study suggests 10% urushiol and 6% NaOCl solution had powerful antibacterial activity against E. faecalis when they were used as root canal irrigants.
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Affiliation(s)
- Sang-Wan Kim
- Department of Conservative Dentistry, Dankook University College of Dentistry and Institute of Dental Science, Cheonan, Korea
| | - Dong-Hoon Shin
- Department of Conservative Dentistry, Dankook University College of Dentistry and Institute of Dental Science, Cheonan, Korea
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74
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Persoon IF, Crielaard W, Özok AR. Prevalence and nature of fungi in root canal infections: a systematic review and meta-analysis. Int Endod J 2017; 50:1055-1066. [PMID: 27987307 DOI: 10.1111/iej.12730] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 11/28/2016] [Indexed: 12/14/2022]
Abstract
The role of bacteria in causing apical periodontitis has been widely established, whilst the role of other microorganisms is studied less thoroughly. This systematic review and meta-analysis reviewed the literature for the prevalence and diversity of fungi in root canal infections. An extensive literature search was carried out in the Cochrane databases, EMBASE, MEDLINE, LILACS, SciELO and Web of Science. Additional studies were identified from six endodontic journals, four main endodontic textbooks and references of relevant papers. Selected clinical studies included sampling of necrotic pulps in permanent teeth and microbial analysis of these samples. Studies were critically appraised using the Joanna Briggs Institute Prevalence Critical Appraisal Checklist. Meta-analysis was performed using MetaXL. The screening of 1041 titles and abstracts and full-text reading yielded 54 studies. The overall prevalence of fungi in root canal infections was 7.5% (CI 95%: 3.6-11.8%) in the inverse variance fixed effect heterogeneity model. Candida albicans was the most frequently isolated species. Significant heterogeneity was observed (P < 0.001, I2 = 85.04%). Subgroup analyses based on geographical location, period of publication, type of infection, state of general health, communication with the oral cavity, type of sample and identification method revealed no factor influencing the prevalence. Better standardized techniques and a comprehensive analysis will reveal a more detailed and accurate representation of the prevalence and nature of fungi in root canal infections.
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Affiliation(s)
- I F Persoon
- Department of Preventive Dentistry, University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - W Crielaard
- Department of Preventive Dentistry, University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - A R Özok
- Department of Endodontology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
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75
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Bhardwaj A, Srivastava N, Rana V, Adlakha VK, Asthana AK. How efficacious are Neem, Tulsi, Guduchi extracts and chlorhexidine as intracanal disinfectants? A comparative ex vivo study. Ayu 2017; 38:70-75. [PMID: 29861597 PMCID: PMC5954265 DOI: 10.4103/ayu.ayu_72_16] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Introduction: In endodontics, despite careful instrumentation and antimicrobial irrigation, root canals still harbor cultivable microorganisms. Such cases require intra canal medicament that eliminates the microbial inhabitants from the canals. Recent trend advocates the use of herbal extracts due to easy availability, cost-effectiveness, low toxicity, and lack of microbial resistance. Hence, in the present study, Neem, Tulsi, and Guduchi extracts were used as intracanal medicaments. Aim: This study aimed to evaluate and compare the antibacterial efficacy of Neem, Tulsi, Guduchi extracts, and chlorhexidine against Enterococcus faecalis, when used as intracanal medicaments. Materials and Methods: One hundred and twenty-five extracted human teeth, inoculated with E. faecalis, were divided into four experimental groups and a control group (n = 25 in each group). The experimental groups were treated with chlorhexidine, Neem, Tulsi, and Guduchi extracts and their antibacterial property was evaluated by estimating microbial counting (CFU/ml). Results: The reduction in bacterial count for chlorhexidine, Neem, Tulsi, and Guduchi groups was 60.76%, 51.98%, 37.73%, and 34.93%, respectively. Statistically significant difference in reduction of bacterial count was observed in all the groups, when compared with the control group. Conclusion: Among all the herbal extracts, Neem was found to be the most potent medicament followed by Tulsi and Guduchi. However, chlorhexidine was found to be at epic.
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Affiliation(s)
- Ashutosh Bhardwaj
- Department of Paedodontics and Preventive Dentistry, Subharti Dental College, Meerut, Uttar Pradesh, India
| | - Nikhil Srivastava
- Department of Paedodontics and Preventive Dentistry, Subharti Dental College, Meerut, Uttar Pradesh, India
| | - Vivek Rana
- Department of Paedodontics and Preventive Dentistry, Subharti Dental College, Meerut, Uttar Pradesh, India
| | - Vivek Kumar Adlakha
- Department of Paedodontics and Preventive Dentistry, Subharti Dental College, Meerut, Uttar Pradesh, India
| | - Ashish Kumar Asthana
- Department of Microbiology, Subharti Medical College, Meerut, Uttar Pradesh, India
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76
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Hasheminia M, Razavian H, Mosleh H, Shakerian B. In vitro evaluation of the antibacterial activity of five sealers used in root canal therapy. Dent Res J (Isfahan) 2017; 14:62-67. [PMID: 28348620 PMCID: PMC5356391 DOI: 10.4103/1735-3327.201141] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Antibacterial activity is one of the important characteristics of an ideal root canal sealer. The aim of this study was to investigate the antibacterial activity of five different sealers against Enterococcus faecalis using two different methods. MATERIALS AND METHODS The mineral trioxide aggregate (MTA) Fillapex, Tg-sealer, Endomethasone, AH-26, and RoekoSeal sealers were placed into the brain heart infusion (BHI) culture medium containing E. faecalis (PTCC1393). The diameter of the bacterial zone of inhibition was measured. In the direct contact test, a suspension containing grinded set sealers and E. faecalis bacteria was cultured in BHI after 6, 15, and 60 min. The number of colonies in milliliter was calculated. Data were subjected to one-way ANOVA and Tukey's multiple comparisons test (P < 0.05). RESULTS In the agar diffusion test, Endomethasone had the highest antibacterial activity against E. faecalis compared to other sealers (P < 0.001). In the direct test, the antibacterial effect of MTA Fillapex was significantly higher than that of all other sealers (P < 0.001). CONCLUSION The technique and components of the tested sealers affect the antibacterial activity results. This study showed that all of sealers had antimicrobial effect.
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Affiliation(s)
- Mohsen Hasheminia
- Dental Materials Research Center and Department of Endodontics, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Hamid Razavian
- Dental Materials Research Center and Department of Endodontics, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Hamid Mosleh
- Department of Pediatric Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
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Brittan JL, Sprague SV, Macdonald EL, Love RM, Jenkinson HF, West NX. In vivo model for microbial invasion of tooth root dentinal tubules. J Appl Oral Sci 2016; 24:126-35. [PMID: 27119760 PMCID: PMC4836919 DOI: 10.1590/1678-775720150448] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 01/21/2016] [Indexed: 02/04/2023] Open
Abstract
Objective Bacterial penetration of dentinal tubules via exposed dentine can lead to root caries and promote infections of the pulp and root canal system. The aim of this work was to develop a new experimental model for studying bacterial invasion of dentinal tubules within the human oral cavity. Material and Methods Sections of human root dentine were mounted into lower oral appliances that were worn by four human subjects for 15 d. Roots were then fixed, sectioned, stained and examined microscopically for evidence of bacterial invasion. Levels of invasion were expressed as Tubule Invasion Factor (TIF). DNA was extracted from root samples, subjected to polymerase chain reaction amplification of 16S rRNA genes, and invading bacteria were identified by comparison of sequences with GenBank database. Results All root dentine samples with patent tubules showed evidence of bacterial cell invasion (TIF value range from 5.7 to 9.0) to depths of 200 mm or more. A spectrum of Gram-positive and Gram-negative cell morphotypes were visualized, and molecular typing identified species of Granulicatella, Streptococcus, Klebsiella, Enterobacter, Acinetobacter, and Pseudomonas as dentinal tubule residents. Conclusion A novel in vivo model is described, which provides for human root dentine to be efficiently infected by oral microorganisms. A range of bacteria were able to initially invade dentinal tubules within exposed dentine. The model will be useful for testing the effectiveness of antiseptics, irrigants, and potential tubule occluding agents in preventing bacterial invasion of dentine.
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Affiliation(s)
- Jane L Brittan
- Department of Oral and Dental Sciences, University of Bristol, Bristol, United Kingdom
| | - Susan V Sprague
- Department of Oral and Dental Sciences, University of Bristol, Bristol, United Kingdom
| | - Emma L Macdonald
- Department of Oral and Dental Sciences, University of Bristol, Bristol, United Kingdom
| | - Robert M Love
- Department of Oral Diagnostic and Surgical Sciences, University of Otago, Dunedin, New Zealand
| | - Howard F Jenkinson
- Department of Oral and Dental Sciences, University of Bristol, Bristol, United Kingdom
| | - Nicola X West
- Department of Oral and Dental Sciences, University of Bristol, Bristol, United Kingdom
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Zan R, Alacam T, Hubbezoglu I, Tunc T, Sumer Z, Alici O. Antibacterial Efficacy of Super-Oxidized Water on Enterococcus faecalis Biofilms in Root Canal. Jundishapur J Microbiol 2016; 9:e30000. [PMID: 27800142 PMCID: PMC5086080 DOI: 10.5812/jjm.30000] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 07/29/2016] [Accepted: 08/06/2016] [Indexed: 11/23/2022] Open
Abstract
Background The success of endodontic treatment depends on a few crucial factors. One of these factors is the complete chemomechanic preparation of root canal against various bacteria. In particular, the effect of resistant bacteria may cause intense pain with flare-up and formation of periapical lesions. Therefore, the strong effect of irrigants plays an important role in terms of the complete elimination of these bacteria to achieve long-term successful treatment. Objectives The aim of this study was to investigate the antibacterial effects of super-oxidized water (SPO) in root canals infected with Enterococcus faecalis biofilms. Methods One hundred twenty single-root, premolar teeth were selected. Initially, the teeth were prepared and then disinfected. E. faecalis were inoculated and kept at 37°C for 24 hours in the root canals. The re-inoculation procedure was repeated on the first, fourth, seventh, and tenth days. The infected root canals were divided into one negative (saline) and one positive (sodium hypochlorite) control group and four experimental groups (super-oxidized water: 1, 2, 3, or 5 minutes) (n = 20). Paper points were placed in the root canals to control and evaluate the biofilm formation. Biofilms were counted on blood agar plates, and data was evaluated and statistically analyzed using one-way ANOVA and Tukey’s test. Results Although sodium hypochlorite (NaOCl) showed no statistically significant difference when compared with three and five minutes of SPO irrigation (P > 0.05), NaOCl showed statistically significant differences among all other groups (P < 0.05). Conclusions Super-oxidized water indicated a remarkable and similar bactericidal effect to that of traditional NaOCl against E. faecalis biofilms. In terms of successful endodontic treatment approaches, super-oxidized water may be used as an effective irrigation solution in clinics.
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Affiliation(s)
- Recai Zan
- Department of Endodontics, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey
- Corresponding author: Recai Zan, Department of Endodontics, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey, E-mail:
| | - Tayfun Alacam
- Department of Endodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey
| | - Ihsan Hubbezoglu
- Department of Restorative Dentistry, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey
| | - Tutku Tunc
- Department of Microbiology, Faculty of Medicine, Cumhuriyet University, Sivas, Turkey
| | - Zeynep Sumer
- Department of Microbiology, Faculty of Medicine, Cumhuriyet University, Sivas, Turkey
| | - Oguzhan Alici
- Department of Restorative Dentistry, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey
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79
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Zhou XC, Li YL, Liu DX, Cao YG, Lu XP. Bactericidal effect of plasma jet with helium flowing through 3% hydrogen peroxide against Enterococcus faecalis. Exp Ther Med 2016; 12:3073-3077. [PMID: 27882119 PMCID: PMC5103749 DOI: 10.3892/etm.2016.3726] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 08/23/2016] [Indexed: 11/06/2022] Open
Abstract
The aim of the present study was to assess the antimicrobial activity of plasma jet with helium (He) flowing through 3% hydrogen peroxide in root canals infected with Enterococcus faecalis. A total of 42 single-rooted anterior teeth were prepared, sterilized, inoculated with an E. faecalis suspension and incubated for 7 days. Next, the teeth were randomly divided into six experimental groups (including groups treated by plasma jet with or without He for different time durations) and one control group treated without plasma. The number of surviving bacteria in each canal was determined by counting the colony forming units (CFU)/ml on nutrient agar plates. The results indicated that statistically significant reduction in CFU/ml (P<0.005) existed for all treatment groups relative to the control group. The greatest reductions in CFU/ml were observed for Group 3 (7.027 log unit reduction) and Group 2 (6.237 log unit reduction), which were treated by plasma jet sterilization with He flowing through 3% hydrogen peroxide for 4 min or for 2 min, respectively. In addition, the reduction in Group 3 was significantly greater compared with that in Group 2 or in the groups treated by plasma jet sterilization without He flowing through 3% hydrogen peroxide for 1, 2 or 4 min. In conclusion, plasma jet with or without He flowing through 3% hydrogen peroxide can effectively sterilized root canals infected with E. faecalis and should be considered as an alternative method for root canal disinfection in endodontic treatments.
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Affiliation(s)
- Xin-Cai Zhou
- Department of Stomatology, Baoan Maternal and Child Health Hospital, College of Medicine, Jinan University, Shenzhen, Guangdong 518133, P.R. China
| | - Yu-Lan Li
- Department of Stomatology, Baoan Maternal and Child Health Hospital, College of Medicine, Jinan University, Shenzhen, Guangdong 518133, P.R. China
| | - De-Xi Liu
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Ying-Guang Cao
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Xin-Pei Lu
- College of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, P.R. China
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80
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Hong SW, Baik JE, Kang SS, Kum KY, Yun CH, Han SH. Sodium Hypochlorite Inactivates Lipoteichoic Acid of Enterococcus faecalis by Deacylation. J Endod 2016; 42:1503-8. [DOI: 10.1016/j.joen.2016.06.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 06/23/2016] [Accepted: 06/26/2016] [Indexed: 01/12/2023]
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81
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Baik JE, Choe HI, Hong SW, Kang SS, Ahn KB, Cho K, Yun CH, Han SH. Human salivary proteins with affinity to lipoteichoic acid of Enterococcus faecalis. Mol Immunol 2016; 77:52-9. [PMID: 27474971 DOI: 10.1016/j.molimm.2016.07.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Revised: 07/15/2016] [Accepted: 07/19/2016] [Indexed: 12/16/2022]
Abstract
Enterococcus faecalis is associated with refractory apical periodontitis and its lipoteichoic acid (Ef.LTA) is considered as a major virulence factor. Although the binding proteins of Ef.LTA may play an important role for mediating infection and immunity in the oral cavity, little is known about Ef.LTA-binding proteins (Ef.LTA-BPs) in saliva. In this study, we identified salivary Ef.LTA-BPs with biotinylated Ef.LTA (Ef.LTA-biotin) through mass spectrometry. The biotinylation of Ef.LTA was confirmed by binding capacity with streptavidin-FITC on CHO/CD14/TLR2 cells. The biological activity of Ef.LTA-biotin was determined based on the induction of nitric oxide and macrophage inflammatory protein-1α in a macrophage cell-line, RAW 264.7. To identify salivary Ef.LTA-BPs, the Ef.LTA-biotin was mixed with a pool of human saliva obtained from nine healthy subjects followed by precipitation with a streptavidin-coated bead. Ef.LTA-BPs were then separated with 12% SDS-PAGE and subjected to the mass spectrometry. Six human salivary Ef.LTA-BPs including short palate lung and nasal epithelium carcinoma-associated protein 2, zymogen granule protein 16 homolog B, hemoglobin subunit α and β, apolipoprotein A-I, and lipocalin-1 were identified with statistical significance (P<0.05). Ef.LTA-BPs were validated with lipocalin-1 using pull-down assay. Hemoglobin inhibited the biofilm formation of E. faecalis whereas lipocalin-1 did not show such effect. Collectively, the identified Ef.LTA-BPs could provide clues for our understanding of the pathogenesis of E. faecalis and host immunity in oral cavity.
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Affiliation(s)
- Jung Eun Baik
- Department of Oral Microbiology and Immunology, DRI, and BK21 Plus Program, School of Dentistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyuk-Il Choe
- Department of Oral Microbiology and Immunology, DRI, and BK21 Plus Program, School of Dentistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Sun Woong Hong
- Department of Oral Microbiology and Immunology, DRI, and BK21 Plus Program, School of Dentistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Seok-Seong Kang
- Department of Oral Microbiology and Immunology, DRI, and BK21 Plus Program, School of Dentistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Ki Bum Ahn
- Department of Oral Microbiology and Immunology, DRI, and BK21 Plus Program, School of Dentistry, Seoul National University, Seoul 08826, Republic of Korea
| | - Kun Cho
- Biomedical Omics Group, Korea Basic Science Institute, Ochang 28119, Republic of Korea
| | - Cheol-Heui Yun
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Seung Hyun Han
- Department of Oral Microbiology and Immunology, DRI, and BK21 Plus Program, School of Dentistry, Seoul National University, Seoul 08826, Republic of Korea.
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Taylor C, Roudsari RV, Jawad S, Darcey J, Qualtrough A. Modern Endodontic Principles. Part 6: Managing Complex Situations. ACTA ACUST UNITED AC 2016; 43:218-20, 223-6, 229-32. [PMID: 27439269 DOI: 10.12968/denu.2016.43.3.218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Clinicians are often faced with endodontic cases that are significantly more challenging than the primary root canal treatment of mature adult teeth. This paper outlines some of the common treatment modalities which can be employed in situations in which either primary treatment has failed, or there is iatrogenic damage or unusual anatomy. CPD/Clinical Relevance: This paper will provide the reader with advice and techniques for undertaking orthograde endodontic retreatment, hemisection, endodontic surgery and management of teeth with incompletely formed roots.
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83
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Singh G, Gupta I, Elshamy FMM, Boreak N, Homeida HE. In vitro comparison of antibacterial properties of bioceramic-based sealer, resin-based sealer and zinc oxide eugenol based sealer and two mineral trioxide aggregates. Eur J Dent 2016; 10:366-369. [PMID: 27403055 PMCID: PMC4926590 DOI: 10.4103/1305-7456.184145] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Objective: Our goal of the study was to evaluate the antibacterial properties of endodontic sealers against the E. faecalis. Materials and Methods: Six millimeters wells were made for each material in all the preinoculated petri plates. Then, the petri plates were incubated for 24 h. The zones of inhibition appeared were measured, and the measurements were put to statistical analysis. Results: EndoSequence BC Sealer, MM-mineral trioxide aggregate (MTA), and ProRoot MTA showed maximum means of diameter of zones of inhibition, whereas MM-seal and Endoseal did not show any zones of inhibition. Conclusion: EndoSequence BC Sealer was found to be a better endodontic sealer as compared to resin-based and zinc oxide-eugenol-based sealer.
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Affiliation(s)
- Gurpreet Singh
- Department of Endodontics, College of Dentistry, Jazan University, Jizan, Kingdom of Saudi Arabia
| | - Iti Gupta
- Department of Endodontics, College of Dentistry, Jazan University, Jizan, Kingdom of Saudi Arabia
| | - Faheim M M Elshamy
- Department of Dental Materials, College of Dentistry, Jazan University, Jizan, Kingdom of Saudi Arabia
| | - Nezar Boreak
- Department of Endodontics, College of Dentistry, Jazan University, Jizan, Kingdom of Saudi Arabia
| | - Husham Elraih Homeida
- Department of Microbiology, College of Dentistry, Jazan University, Jizan, Kingdom of Saudi Arabia
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84
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Henriques LCF, de Brito LCN, Tavares WLF, Teles RP, Vieira LQ, Teles FR, Sobrinho APR. Microbial Ecosystem Analysis in Root Canal Infections Refractory to Endodontic Treatment. J Endod 2016; 42:1239-45. [PMID: 27377440 DOI: 10.1016/j.joen.2016.05.014] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 05/13/2016] [Accepted: 05/19/2016] [Indexed: 02/05/2023]
Abstract
INTRODUCTION The purpose of this study was to combine multiple displacement amplification and checkerboard DNA-DNA hybridization to qualitatively and quantitatively evaluate the microbiota present in infections refractory to endodontic treatment. METHODS The subjects of this study were 40 patients presenting with periapical lesions refractory to endodontic treatment. Samples were taken by scraping or filing root canal walls with a #10 K-type hand file. Sample DNA was amplified by multiple displacement amplification, and the levels of 107 bacterial taxa were analyzed by checkerboard DNA-DNA hybridization. The taxa were divided into 3 distinct microbial populations depending on their mean proportion in samples (% DNA probe counts ± standard error of the mean) as follows: dominant (≥3.0%), subdominant (>1.6%-3.0%), and residual (≤1.6%) populations. The significance of differences was determined using the Mann-Whitney test. RESULTS The taxa present with the highest mean proportions (constituting the dominant population) were Corynebacterium diphtheriae (8.03 ± 0.98), Porphyromonas gingivalis (5.42 ± 2.09), Streptococcus sobrinus (5.33 ± 0.69), and Stenotrophomonas maltophilia (4.72 ± 1.73). Among the subdominant population were Eubacterium saphenum (3.85 ± 1.06), Helicobacter pylori (3.16 ± 0.62), Dialister pneumosintes (3.12 ± 1.1), Clostridium difficile (2.74 ± 0.41), Enterobacter agglomerans (2.64 ± 0.54), Salmonella enterica (2.51 ± 0.52), Mobiluncus mulieris (2.44 ± 0.6), and Klebsiella oxytoca (2.32 ± 0.66). In the population of bacteria present at the lowest mean proportions (the residual population), Bacteroides ureolyticus (0.04 ± 0.01), Haemophilus influenzae (0.04 ± 0.02), and Prevotella oris (0.01 ± 0.01) were found at the lowest mean proportions. Enterococcus faecalis was detected in the residual population (0.52 ± 0.26). CONCLUSIONS The microbial climax community in teeth refractory to endodontic treatment not only harbors medically important species but also contains distinct microbial consortia present with different population levels.
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Affiliation(s)
- Luiz Carlos Feitosa Henriques
- Departamento de Odontologia Restauradora, Faculdade de Odontologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | - Warley Luciano Faria Tavares
- Departamento de Odontologia Restauradora, Faculdade de Odontologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Ricardo Palmier Teles
- Periodontology, University of North Carolina at Chapel Hill School of Dentistry, Chapel Hill, North Carolina; Departamento de Bioquímica e Imunologia Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Leda Quércia Vieira
- Departamento de Bioquímica e Imunologia Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Flávia Rodrigues Teles
- Periodontology, University of North Carolina at Chapel Hill School of Dentistry, Chapel Hill, North Carolina; Departamento de Bioquímica e Imunologia Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Antônio Paulino Ribeiro Sobrinho
- Departamento de Odontologia Restauradora, Faculdade de Odontologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
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Garlapati R, Venigalla BS, Surakanti JR, Thumu J, Chennamaneni KC, Kalluru RS. Comparison of the Antimicrobial Efficacy of Two Antibiotics Sparfloxacin and Augmentin as Experimental Root Canal Irrigating Solutions against Enterococcus faecalis - An Invitro Study. J Clin Diagn Res 2016; 10:ZC57-60. [PMID: 27135003 DOI: 10.7860/jcdr/2016/17199.7470] [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: 10/07/2015] [Accepted: 11/19/2015] [Indexed: 11/24/2022]
Abstract
INTRODUCTION One of the main goals of endodontic treatment is root canal disinfection and to prevent subsequent chances of reinfection. Adjuvant to instrumentation, root canal irrigants are required to eliminate the bacteria found on the root canal walls and lateral canals within the dentinal tubules. AIM To measure and compare the antibacterial efficacy of two antibiotics as experimental root canal irrigating solutions against Enterococcus faecalis (E. faecalis). MATERIALS AND METHODS Fifteen Brain Heart Infusion agar plates were inoculated with Enterococcus faecalis-American Type Culture Collection (ATCC) 29212. 5 micrograms (mcg) Sparfloxacin discs, 30mcg Augmentin discs, and sterile paper test discs saturated with 2% Chlorhexidine (CHX), 3% Sodium Hypochlorite (NaOCl) and 5% NaOCl solutions were placed on agar plates. Sodium Chloride 0.9% (NaCl) paper discs were used as controls. Fifteen plates were incubated aerobically at 37°C. Results were expressed as per the terms of the diameter of the inhibition zone. RESULTS Results suggested a statistically significant difference in the zones of inhibition between five irrigating solutions (p < 0.001). CONCLUSION Although, zones of inhibition were found in all the groups, 5mcg Sparfloxacin and 30mcg Augmentin showed maximum antimicrobial activity against E.faecalis.
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Affiliation(s)
- Roopadevi Garlapati
- Senior Lecturer, Department of Conservative Dentistry and Endodontics, Kamineni Institute of Dental Sciences , Narketpally, Telangana, India
| | - Bhuvan Shome Venigalla
- Professor and Head of Department, Department of Conservative Dentistry and Endodontics, Sri Sai College of Dental Surgery , Vikarabad, Telangana, India
| | - Jayaprada Reddy Surakanti
- Professor, Department of Conservative Dentistry and Endodontics, Kamineni Institute of Dental Sciences , Narketpally, Telangana, India
| | - Jayaprakash Thumu
- Professor and Head of Department, Department of Conservative Dentistry and Endodontics, St. Joseph Dental College , Eluru, Andhra Pradesh, India
| | - Krishna Chaitanya Chennamaneni
- Reader, Department of Conservative Dentistry and Endodontics, Sri Sai College of Dental Surgery , Vikarabad, Telangana, India
| | - Rama S Kalluru
- Senior Lecturer, Department of Conservative Dentistry and Endodontics, Sibar Institute of Dental Sciences , Andhra Pradesh, India
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Azim AA, Aksel H, Zhuang T, Mashtare T, Babu JP, Huang GTJ. Efficacy of 4 Irrigation Protocols in Killing Bacteria Colonized in Dentinal Tubules Examined by a Novel Confocal Laser Scanning Microscope Analysis. J Endod 2016; 42:928-34. [PMID: 27130334 DOI: 10.1016/j.joen.2016.03.009] [Citation(s) in RCA: 96] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 03/10/2016] [Accepted: 03/11/2016] [Indexed: 11/16/2022]
Abstract
INTRODUCTION The aim of this study was to determine the efficiency of 4 irrigation systems in eliminating bacteria in root canals, particularly in dentinal tubules. METHODS Roots of human teeth were prepared to 25/04, autoclaved, and inoculated with Enterococcus faecalis for 3 weeks. Canals were then disinfected by (1) standard needle irrigation, (2) sonically agitating with EndoActivator, (3) XP Endo finisher, or (4) erbium:yttrium aluminum garnet laser (PIPS) (15 roots/group). The bacterial reduction in the canal was determined by MTT assays. For measuring live versus dead bacteria in the dentinal tubules (4 teeth/group), teeth were split open and stained with LIVE/DEAD BackLight. Coronal, middle, and apical thirds of the canal dentin were scanned by using a confocal laser scanning microscope (CLSM) to determine the ratio of dead/total bacteria in the dentinal tubules at various depths. RESULTS All 4 irrigation protocols significantly eliminated bacteria in the canal, ranging from 89.6% to 98.2% reduction (P < .001). XP Endo had the greatest bacterial reduction compared with other 3 techniques (P < .05). CLSM analysis showed that XP Endo had the highest level of dead bacteria in the coronal, middle, and apical segments at 50-μm depth. On the other hand, PIPS had the greatest bacterial killing efficiency at the 150-μm depth in all 3 root segments. CONCLUSIONS XP Endo appears to be more efficient than other 3 techniques in disinfecting the main canal space and up to 50 μm deep into the dentinal tubules. PIPS appears to be most effective in killing the bacteria deep in the dentinal tubules.
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Affiliation(s)
- Adham A Azim
- Department of Bioscience Research, College of Dentistry, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Hacer Aksel
- Department of Bioscience Research, College of Dentistry, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Tingting Zhuang
- Department of Biostatistics, University at Buffalo School of Public Health and Health Professions, Buffalo, New York
| | - Terry Mashtare
- Department of Biostatistics, University at Buffalo School of Public Health and Health Professions, Buffalo, New York
| | - Jegdish P Babu
- Department of Bioscience Research, College of Dentistry, University of Tennessee Health Science Center, Memphis, Tennessee
| | - George T-J Huang
- Department of Bioscience Research, College of Dentistry, University of Tennessee Health Science Center, Memphis, Tennessee.
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Asnaashari M, Godiny M, Azari-Marhabi S, Tabatabaei FS, Barati M. Comparison of the Antibacterial Effect of 810 nm Diode Laser and Photodynamic Therapy in Reducing the Microbial Flora of Root Canal in Endodontic Retreatment in Patients With Periradicular Lesions. J Lasers Med Sci 2016; 7:99-104. [PMID: 27330705 DOI: 10.15171/jlms.2016.17] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
INTRODUCTION The aim of this study was to compare the antibacterial efficacy of diode laser 810nm and photodynamic therapy (PDT) in reducing bacterial microflora in endodontic retreatment of teeth with periradicular lesion. METHODS In this in vivo clinical trial, 20 patients who needed endodontic retreatment were selected. After conventional chemo mechanical preparation of root canals, microbiological samples were taken with sterile paper point (PP), held in thioglycollate broth, and then were transferred to the microbiological lab. In the first group, PDT with methylene blue (MB) and diode laser (810 nm, 0.2 W, 40 seconds) was performed and in the second group diode laser (810 nm, 1.2 W, 30 seconds) was irradiated. Then second samples were taken from all canals. RESULTS CFU/ml amounts showed statistically significant reduction in both groups (P < 0.001). CFU/ml amounts were compared between the two groups and there was no statistical difference. CONCLUSION PDT and diode laser 810 nm irradiation are effective methods for root canal disinfection. PDT is a suitable alternative for diode laser 810 nm irradiation, because of lower thermal risk on root dentin.
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Affiliation(s)
- Mohammad Asnaashari
- Department of Endodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mostafa Godiny
- Department of Endodontics, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Saranaz Azari-Marhabi
- Department of Oral and Maxillofacial Medicine, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fahimeh Sadat Tabatabaei
- Department of Dental Materials, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam Barati
- Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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88
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Asnaashari M, Mojahedi SM, Asadi Z, Azari-Marhabi S, Maleki A. A comparison of the antibacterial activity of the two methods of photodynamic therapy (using diode laser 810 nm and LED lamp 630 nm) against Enterococcus faecalis in extracted human anterior teeth. Photodiagnosis Photodyn Ther 2016; 13:233-237. [DOI: 10.1016/j.pdpdt.2015.07.171] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 06/23/2015] [Accepted: 07/20/2015] [Indexed: 11/24/2022]
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Comparative antimicrobial efficacy of herbal alternatives (Emblica officinalis, Psidium guajava), MTAD, and 2.5% sodium hypochlorite against Enterococcus faecalis: An in vitro study. J Oral Biol Craniofac Res 2016; 6:45-8. [PMID: 26937369 DOI: 10.1016/j.jobcr.2015.12.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 12/28/2015] [Indexed: 11/23/2022] Open
Abstract
AIM The objective of this study was to evaluate the antimicrobial efficacy of herbal alternatives (Emblica officinalis, Psidium guajava), BioPure MTAD, and 2.5% sodium hypochlorite against Enterococcus faecalis. MATERIALS AND METHOD The testing of the antimicrobial efficacy of selected medicaments against E. faecalis was done by the agar disk-diffusion method. Whatman paper discs of 6 mm diameter were prepared and soaked with the test solution. These discs were then placed onto the previously seeded agar Petri plates. Later, these plates were incubated for 48 h at 37 °C under the appropriate gaseous conditions in a CO2 incubator. A zone of inhibition was recorded in millimeter for each plate and the results were analyzed statistically. RESULT MTAD was found to be superior in its antibacterial abilities against E. faecalis compared with the other irrigants used. All the other tested irrigants showed significant zone of inhibition. CONCLUSIONS BioPure MTAD offers better antibacterial efficacy than NaOCl. E. officinalis and P. guajava are effective antibacterial agents against E. faecalis and can be used to reduce root canal microflora and root canal failures.
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Herbst SR, Hertel M, Ballout H, Pierdzioch P, Weltmann KD, Wirtz HC, Abu-Sirhan S, Kostka E, Paris S, Preissner S. Bactericidal Efficacy of Cold Plasma at Different Depths of Infected Root Canals In Vitro. Open Dent J 2015; 9:486-91. [PMID: 26962378 PMCID: PMC4768658 DOI: 10.2174/1874210601509010486] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 11/03/2015] [Accepted: 11/06/2015] [Indexed: 11/27/2022] Open
Abstract
Objectives: Cold plasma (CP) has been shown to be effective even against multiresistant microorganisms. As previous investigations on the effect of CP in root canals showed promising results, the aim of the present study was to analyze the bactericidal efficacy of CP in different depths of infected dentin. Methods: 32 standardized root canals of human mandibular premolars were infected with Enterococcus faecalis and incubated for one week. Specimens were randomly selected for one of four disinfection methods: control (5mL NaCl), 5mL chlorhexidine (CHX), CP alone (CP), and a combination of 5mL CHX and cold plasma (CHX+CP). CHX was ultrasonically activated for 30s, while cold plasma was used for 60s in the root canals. Dentin samples at depths of 300, 500 and 800 µm were obtained and diluted serially. Colony forming units (CFUs) were counted on agar plates after 24h of incubation. Results: The highest overall logarithmic reduction factors (RF) were obtained from CHX+CP (log RF 3.56 p<0.01; Mann-Whitney U test), followed by CP (log RF 3.27 p<0.01) and CHX alone (log RF 2.65 p<0.01) related to the control. All disinfection methods showed significantly lower CFU counts compared to the control group in 300 µm and 800 µm (both p<0.01, Kruskal-Wallis test). Discussion: The adjuvant use of CP might be beneficial in highly infected root canals to improved disinfection. However, the disinfection effect against Enterococcus faecalis of CP is comparable to ultrasonically activated CHX.
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Affiliation(s)
- Sascha R Herbst
- Charité - Universitätsmedizin Berlin, Department of Operative and Preventive Dentistry, Germany
| | - Moritz Hertel
- Charité - Universitätsmedizin Berlin, Department of Oral Medicine, Dental Radiology and Oral Surgery, Germany
| | - Husam Ballout
- Charité - Universitätsmedizin Berlin, Department of Operative and Preventive Dentistry, Germany
| | - Philipp Pierdzioch
- Charité - Universitätsmedizin Berlin, Department of Operative and Preventive Dentistry, Germany
| | - Klaus-Dieter Weltmann
- INP Greifswald, Leibniz Institute for Plasma Science and Technology, Greifswald, Germany
| | - Henrik C Wirtz
- Charité - Universitätsmedizin Berlin, Department of Operative and Preventive Dentistry, Germany
| | - Shady Abu-Sirhan
- Charité - Universitätsmedizin Berlin, Department of Operative and Preventive Dentistry, Germany
| | - Eckehard Kostka
- Charité - Universitätsmedizin Berlin, Department of Operative and Preventive Dentistry, Germany
| | - Sebastian Paris
- Charité - Universitätsmedizin Berlin, Department of Operative and Preventive Dentistry, Germany
| | - Saskia Preissner
- Charité - Universitätsmedizin Berlin, Department of Operative and Preventive Dentistry, Germany
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91
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Boch T, Tennert C, Vach K, Al-Ahmad A, Hellwig E, Polydorou O. Effect of gaseous ozone on Enterococcus faecalis biofilm-an in vitro study. Clin Oral Investig 2015; 20:1733-9. [PMID: 26637463 DOI: 10.1007/s00784-015-1667-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 11/17/2015] [Indexed: 10/22/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the antimicrobial effect of gaseous ozone compared to conventional methods against Enterococcus faecalis. MATERIALS AND METHODS One hundred twenty-five teeth were infected by E. faecalis and were incubated for 72 h to form biofilm. Teeth were distributed among five groups. In the first group, ozone was used; in the second group, teeth were rinsed with 20 % ethylenediaminetetraacetic acid (EDTA); in the third group, with 3 % sodium hypochlorite (NaOCl). Group 4 combined 20 % EDTA with ozone. NaOCl and ozone were combined in group 5. After treatment, the samples with paper points were taken, followed by dentin samples taken with K-file, and cultured for 24 h. Then bacterial colonies were counted. RESULTS All treatments reduced significantly (p < 0.05) the bacteria. Paper points' samples showed 85.38 % reduction after ozone. The highest reduction was observed in NaOCl group (99.98 %). EDTA reduced bacteria by 80.64 %. Combination of NaOCl and ozone eradicated 99.95 % of the bacteria. Combination of EDTA and ozone reduced E. faecalis up to 91.33 %. The dentin chips showed the following: the highest CFU counts were observed in EDTA group, followed by ozone and NaOCl group. The lowest CFU counts were found in NaOCl-ozone group and EDTA-ozone group. CONCLUSIONS Ozone reduced E. faecalis, even organised in a biofilm, however, lower than NaOCl. No treatment reduced totally the bacteria. CLINICAL RELEVANCE Used as an adjuvant, ozone can increase the efficacy of conventional rinsing like EDTA and presents an alternative treatment when NaOCl cannot be used e.g. in teeth with a wide-open apical foramen.
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Affiliation(s)
- Tanja Boch
- Department of Operative Dentistry and Periodontology, University Medical Center Freiburg, Hugstetterstraße 55, 79106, Freiburg i. Br, Germany.
| | - Christian Tennert
- Department of Operative Dentistry and Periodontology, University Medical Center Freiburg, Hugstetterstraße 55, 79106, Freiburg i. Br, Germany
| | - Kirstin Vach
- Center for Medical Biometry and Medical Informatics, Institute for Medical Biometry and Statistics, Medical Center-University of Freiburg, Stefan-Meier-Str. 26, 79104, Freiburg, Germany
| | - Ali Al-Ahmad
- Department of Operative Dentistry and Periodontology, University Medical Center Freiburg, Hugstetterstraße 55, 79106, Freiburg i. Br, Germany
| | - Elmar Hellwig
- Department of Operative Dentistry and Periodontology, University Medical Center Freiburg, Hugstetterstraße 55, 79106, Freiburg i. Br, Germany
| | - Olga Polydorou
- Department of Operative Dentistry and Periodontology, University Medical Center Freiburg, Hugstetterstraße 55, 79106, Freiburg i. Br, Germany
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92
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Liu Y, Guo L, Li Y, Guo X, Wang B, Wu L. In vitro comparison of antimicrobial effectiveness of QMix and other final irrigants in human root canals. Sci Rep 2015; 5:17823. [PMID: 26631907 PMCID: PMC4668572 DOI: 10.1038/srep17823] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Accepted: 11/06/2015] [Indexed: 11/14/2022] Open
Abstract
Final root canal irrigation stands as an effective strategy for eliminating the dentin infection. This study aimed to investigate and compare the antibacterial efficacy of QMix and other four final irrigation regimens in reducing Enterococcus faecalis within human root canals. Single-canal human teeth contaminated with E. faecalis for 4 weeks were prepared chemomechanically with sodium hypochlorite (NaOCl). Then, the teeth were randomly assigned into six groups according to the final irrigation protocols: (1) EDTA/NaOCl, 17% EDTA followed by 5.25% NaOCl; (2) EDTA/chlorhexidine (CHX), 17% EDTA followed by 2% CHX; (3) EDTA/cetrimide (CTR), 17% EDTA followed by 2% CTR; (4) MTAD; (5) QMix; and (6) control, 0.9% saline. Bacterial samples collected before instrumentation and after final irrigation were cultured and the colony-forming units (CFUs) were counted. The CFUs in the QMix, EDTA/CHX, and EDTA/CTR groups were significantly lower than those in the EDTA/NaOCl group. No significant differences were observed between the QMix, EDTA/CHX, and EDTA/CTR groups. MTAD showed weaker ability than QMix and EDTA/CHX to eliminate E. faecalis, but it caused a greater reduction in CFU than EDTA/NaOCl. Hence, the antimicrobial activity of QMix was comparable to that of EDTA/CHX and EDTA/CTR and more effective than that of EDTA/NaOCl against intracanal E. faecalis.
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Affiliation(s)
- Ying Liu
- Department of Endodontics, School of Stomatology, Tianjin Medical University, Tianjin, China
| | - Lili Guo
- Department of Stomatology, The First Affiliated Hospital of Henan University of TCM, Henan, China
| | - Yuqin Li
- Department of Stomatology, Affiliated Hospital of Guiyang Medical College, Guizhou, China
| | - Xiangjun Guo
- Department of Endodontics, School of Stomatology, Tianjin Medical University, Tianjin, China
| | - Bin Wang
- Department of Endodontics, School of Stomatology, Tianjin Medical University, Tianjin, China
| | - Ligeng Wu
- Department of Endodontics, School of Stomatology, Tianjin Medical University, Tianjin, China
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93
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Lee DK, Kim SV, Limansubroto AN, Yen A, Soundia A, Wang CY, Shi W, Hong C, Tetradis S, Kim Y, Park NH, Kang MK, Ho D. Nanodiamond-Gutta Percha Composite Biomaterials for Root Canal Therapy. ACS NANO 2015; 9:11490-501. [PMID: 26452304 PMCID: PMC4660386 DOI: 10.1021/acsnano.5b05718] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Accepted: 10/09/2015] [Indexed: 05/20/2023]
Abstract
Root canal therapy (RCT) represents a standard of treatment that addresses infected pulp tissue in teeth and protects against future infection. RCT involves removing dental pulp comprising blood vessels and nerve tissue, decontaminating residually infected tissue through biomechanical instrumentation, and root canal obturation using a filler material to replace the space that was previously composed of dental pulp. Gutta percha (GP) is typically used as the filler material, as it is malleable, inert, and biocompatible. While filling the root canal space with GP is the standard of care for endodontic therapies, it has exhibited limitations including leakage, root canal reinfection, and poor mechanical properties. To address these challenges, clinicians have explored the use of alternative root filling materials other than GP. Among the classes of materials that are being explored as novel endodontic therapy platforms, nanodiamonds (NDs) may offer unique advantages due to their favorable properties, particularly for dental applications. These include versatile faceted surface chemistry, biocompatibility, and their role in improving mechanical properties, among others. This study developed a ND-embedded GP (NDGP) that was functionalized with amoxicillin, a broad-spectrum antibiotic commonly used for endodontic infection. Comprehensive materials characterization confirmed improved mechanical properties of NDGP over unmodified GP. In addition, digital radiography and microcomputed tomography imaging demonstrated that obturation of root canals with NDGP could be achieved using clinically relevant techniques. Furthermore, bacterial growth inhibition assays confirmed drug functionality of NDGP functionalized with amoxicillin. This study demonstrates a promising path toward NDGP implementation in future endodontic therapy for improved treatment outcomes.
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Affiliation(s)
- Dong-Keun Lee
- Division of Oral Biology and Medicine, Division of Diagnostic and Surgical Sciences-Section of Oral and Maxillofacial Radiology, Division of Growth & Development-Section of Orthodontics, Laboratory of Stem Cell & Cancer Epigenetic Research, Center for Oral and Head/Neck Oncology Research Center, Division of Oral Biology & Medicine, Division of Constitutive and Regenerative Sciences-Section of Endodontics, Division of Advanced Prosthodontics, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, and Laboratory Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, California 90095, United States
| | - Sue Vin Kim
- Division of Oral Biology and Medicine, Division of Diagnostic and Surgical Sciences-Section of Oral and Maxillofacial Radiology, Division of Growth & Development-Section of Orthodontics, Laboratory of Stem Cell & Cancer Epigenetic Research, Center for Oral and Head/Neck Oncology Research Center, Division of Oral Biology & Medicine, Division of Constitutive and Regenerative Sciences-Section of Endodontics, Division of Advanced Prosthodontics, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, and Laboratory Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, California 90095, United States
| | - Adelheid Nerisa Limansubroto
- Division of Oral Biology and Medicine, Division of Diagnostic and Surgical Sciences-Section of Oral and Maxillofacial Radiology, Division of Growth & Development-Section of Orthodontics, Laboratory of Stem Cell & Cancer Epigenetic Research, Center for Oral and Head/Neck Oncology Research Center, Division of Oral Biology & Medicine, Division of Constitutive and Regenerative Sciences-Section of Endodontics, Division of Advanced Prosthodontics, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, and Laboratory Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, California 90095, United States
| | - Albert Yen
- Department of Bioengineering, UCLA Henry Samueli School of Engineering and Applied Science, Los Angeles, California 90095, United States
| | - Akrivoula Soundia
- Division of Oral Biology and Medicine, Division of Diagnostic and Surgical Sciences-Section of Oral and Maxillofacial Radiology, Division of Growth & Development-Section of Orthodontics, Laboratory of Stem Cell & Cancer Epigenetic Research, Center for Oral and Head/Neck Oncology Research Center, Division of Oral Biology & Medicine, Division of Constitutive and Regenerative Sciences-Section of Endodontics, Division of Advanced Prosthodontics, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, and Laboratory Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, California 90095, United States
| | - Cun-Yu Wang
- Division of Oral Biology and Medicine, Division of Diagnostic and Surgical Sciences-Section of Oral and Maxillofacial Radiology, Division of Growth & Development-Section of Orthodontics, Laboratory of Stem Cell & Cancer Epigenetic Research, Center for Oral and Head/Neck Oncology Research Center, Division of Oral Biology & Medicine, Division of Constitutive and Regenerative Sciences-Section of Endodontics, Division of Advanced Prosthodontics, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, and Laboratory Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, California 90095, United States
- Department of Bioengineering, UCLA Henry Samueli School of Engineering and Applied Science, Los Angeles, California 90095, United States
- Jonsson Comprehensive Cancer Center and California NanoSystems Institute, UCLA, Los Angeles, California 90095, United States
| | - Wenyuan Shi
- Division of Oral Biology and Medicine, Division of Diagnostic and Surgical Sciences-Section of Oral and Maxillofacial Radiology, Division of Growth & Development-Section of Orthodontics, Laboratory of Stem Cell & Cancer Epigenetic Research, Center for Oral and Head/Neck Oncology Research Center, Division of Oral Biology & Medicine, Division of Constitutive and Regenerative Sciences-Section of Endodontics, Division of Advanced Prosthodontics, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, and Laboratory Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, California 90095, United States
- Jonsson Comprehensive Cancer Center and California NanoSystems Institute, UCLA, Los Angeles, California 90095, United States
| | - Christine Hong
- Division of Oral Biology and Medicine, Division of Diagnostic and Surgical Sciences-Section of Oral and Maxillofacial Radiology, Division of Growth & Development-Section of Orthodontics, Laboratory of Stem Cell & Cancer Epigenetic Research, Center for Oral and Head/Neck Oncology Research Center, Division of Oral Biology & Medicine, Division of Constitutive and Regenerative Sciences-Section of Endodontics, Division of Advanced Prosthodontics, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, and Laboratory Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, California 90095, United States
| | - Sotirios Tetradis
- Division of Oral Biology and Medicine, Division of Diagnostic and Surgical Sciences-Section of Oral and Maxillofacial Radiology, Division of Growth & Development-Section of Orthodontics, Laboratory of Stem Cell & Cancer Epigenetic Research, Center for Oral and Head/Neck Oncology Research Center, Division of Oral Biology & Medicine, Division of Constitutive and Regenerative Sciences-Section of Endodontics, Division of Advanced Prosthodontics, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, and Laboratory Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, California 90095, United States
| | - Yong Kim
- Division of Oral Biology and Medicine, Division of Diagnostic and Surgical Sciences-Section of Oral and Maxillofacial Radiology, Division of Growth & Development-Section of Orthodontics, Laboratory of Stem Cell & Cancer Epigenetic Research, Center for Oral and Head/Neck Oncology Research Center, Division of Oral Biology & Medicine, Division of Constitutive and Regenerative Sciences-Section of Endodontics, Division of Advanced Prosthodontics, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, and Laboratory Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, California 90095, United States
- Jonsson Comprehensive Cancer Center and California NanoSystems Institute, UCLA, Los Angeles, California 90095, United States
- UCLA Broad Stem Cell Research Center, Box 957357, Los Angeles, California 90095, United States
| | - No-Hee Park
- Division of Oral Biology and Medicine, Division of Diagnostic and Surgical Sciences-Section of Oral and Maxillofacial Radiology, Division of Growth & Development-Section of Orthodontics, Laboratory of Stem Cell & Cancer Epigenetic Research, Center for Oral and Head/Neck Oncology Research Center, Division of Oral Biology & Medicine, Division of Constitutive and Regenerative Sciences-Section of Endodontics, Division of Advanced Prosthodontics, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, and Laboratory Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, California 90095, United States
- Jonsson Comprehensive Cancer Center and California NanoSystems Institute, UCLA, Los Angeles, California 90095, United States
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California 90095, United States
| | - Mo K. Kang
- Division of Oral Biology and Medicine, Division of Diagnostic and Surgical Sciences-Section of Oral and Maxillofacial Radiology, Division of Growth & Development-Section of Orthodontics, Laboratory of Stem Cell & Cancer Epigenetic Research, Center for Oral and Head/Neck Oncology Research Center, Division of Oral Biology & Medicine, Division of Constitutive and Regenerative Sciences-Section of Endodontics, Division of Advanced Prosthodontics, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, and Laboratory Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, California 90095, United States
- Jonsson Comprehensive Cancer Center and California NanoSystems Institute, UCLA, Los Angeles, California 90095, United States
| | - Dean Ho
- Division of Oral Biology and Medicine, Division of Diagnostic and Surgical Sciences-Section of Oral and Maxillofacial Radiology, Division of Growth & Development-Section of Orthodontics, Laboratory of Stem Cell & Cancer Epigenetic Research, Center for Oral and Head/Neck Oncology Research Center, Division of Oral Biology & Medicine, Division of Constitutive and Regenerative Sciences-Section of Endodontics, Division of Advanced Prosthodontics, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, and Laboratory Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, California 90095, United States
- Department of Bioengineering, UCLA Henry Samueli School of Engineering and Applied Science, Los Angeles, California 90095, United States
- Jonsson Comprehensive Cancer Center and California NanoSystems Institute, UCLA, Los Angeles, California 90095, United States
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Kesler Shvero D, Zaltsman N, Weiss EI, Polak D, Hazan R, Beyth N. Lethal bacterial trap: Cationic surface for endodontic sealing. J Biomed Mater Res A 2015; 104:427-34. [DOI: 10.1002/jbm.a.35576] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 09/18/2015] [Accepted: 09/24/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Dana Kesler Shvero
- Department of Prosthodontics, Faculty of Dentistry; The Hebrew University-Hadassah; P.O. Box 12272 Jerusalem 91120 Israel
| | - Nathan Zaltsman
- Department of Prosthodontics, Faculty of Dentistry; The Hebrew University-Hadassah; P.O. Box 12272 Jerusalem 91120 Israel
| | - Ervin I. Weiss
- Department of Prosthodontics, Faculty of Dentistry; The Hebrew University-Hadassah; P.O. Box 12272 Jerusalem 91120 Israel
| | - David Polak
- Department of Periodontology, Faculty of Dentistry; The Hebrew University-Hadassah; P.O. Box 12272 Jerusalem 91120 Israel
| | - Ronen Hazan
- Institute of Dental Sciences, The Hebrew University-Hadassah; P.O. Box 12272 Jerusalem 91120 Israel
| | - Nurit Beyth
- Department of Prosthodontics, Faculty of Dentistry; The Hebrew University-Hadassah; P.O. Box 12272 Jerusalem 91120 Israel
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95
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Lee SW, Shet UK, Park SW, Lim HP, Yun KD, Kang SS, Kim SE. Identification of Enterococcus faecalis antigens specifically expressed in vivo. Restor Dent Endod 2015; 40:306-11. [PMID: 26587417 PMCID: PMC4650527 DOI: 10.5395/rde.2015.40.4.306] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 08/10/2015] [Indexed: 01/05/2023] Open
Abstract
Objectives Molecular mechanism of the pathogenicity of Enterococcus faecalis (E. faecalis), a suspected endodontic pathogen, has not yet been adequately elucidated due to limited information on its virulence factors. Here we report the identification of in vivo expressed antigens of E. faecalis by using a novel immunoscreening technique called change-mediated antigen technology (CMAT) and an experimental animal model of endodontic infection. Materials and Methods Among 4,500 E. coli recombinant clones screened, 19 positive clones reacted reproducibly with hyperimmune sera obtained from rabbits immunized with E. faecalis cells isolated from an experimental endodontic infection. DNA sequences from 16 of these in vivo-induced (IVI) genes were determined. Results Identified protein antigens of E. faecalis included enzymes involved in housekeeping functions, copper resistance protein, putative outer membrane proteins, and proteins of unknown function. Conclusions In vivo expressed antigens of E. faecalis could be identified by using a novel immune-screening technique CMAT and an experimental animal model of endodontic infection. Detailed analysis of these IVI genes will lead to a better understanding of the molecular mechanisms involved in the endodontic infection of E. faecalis.
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Affiliation(s)
- Seok-Woo Lee
- Department of Dental Education, Dental Science Research Institute and BK21 Project, School of Dentistry, Gwangju, Korea. ; Department of Periodontology, Dental Science Research Institute and BK21 Project, School of Dentistry, Gwangju, Korea
| | - Uttom K Shet
- Department of Maxillofacial Surgery, Dental Science Research Institute and BK21 Project, School of Dentistry, Gwangju, Korea
| | - Sang-Won Park
- Department of Prosthodontics, Dental Science Research Institute and BK21 Project, School of Dentistry, Gwangju, Korea
| | - Hyun-Pil Lim
- Department of Prosthodontics, Dental Science Research Institute and BK21 Project, School of Dentistry, Gwangju, Korea
| | - Kwi-Dug Yun
- Department of Prosthodontics, Dental Science Research Institute and BK21 Project, School of Dentistry, Gwangju, Korea
| | - Seong Soo Kang
- Department of Veterinary Medicine, Chonnam National University, Gwangju, Korea
| | - Se Eun Kim
- Department of Veterinary Medicine, Chonnam National University, Gwangju, Korea
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van der Waal SV, Connert T, Crielaard W, de Soet JJ. In mixed biofilms Enterococcus faecalis benefits from a calcium hydroxide challenge and culturing. Int Endod J 2015; 49:865-873. [PMID: 26333716 DOI: 10.1111/iej.12542] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 08/29/2015] [Indexed: 11/28/2022]
Abstract
AIM To evaluate the fate of Enterococcus faecalis in dual-species and multispecies biofilms after treatment with calcium hydroxide (Ca(OH)2 ). METHODOLOGY Biofilms were cultured from laboratory strains of E. faecalis and Pseudomonas aeruginosa, or from microbiota retrieved from primary root canal infections. The biofilms were then treated with Ca(OH)2 . The proportion of E. faecalis and P. aeruginosa and their susceptibility to disinfection were evaluated in a viability assay. In the mixed-species assay, the presence and proportions of E. faecalis before and after Ca(OH)2 treatment were evaluated with a quantitative polymerase chain reaction assay. Groups were compared using Mann-Whitney U-test and Student's t-tests. An α <0.05 was considered statistically significant. RESULTS After Ca(OH)2 treatment in dual-species biofilms, the proportion of E. faecalis had increased (P < 0.001), whereas the total number of CFUs per biofilm was equal. Enterococcus faecalis was equally susceptible to disinfection by sodium hypochlorite (NaOCl) or by chlorhexidine. Pseudomonas aeruginosa had become more susceptible to NaOCl disinfection. The root canal isolates contained no detectable amounts of E. faecalis. After biofilm culturing or Ca(OH)2 treatment, it appeared that E. faecalis must have been present in 5 of 6 (83%) root canal samples. CONCLUSIONS Calcium hydroxide favours the population of E. faecalis in a dual-species biofilm. Culturing multispecies root canal isolates makes E. faecalis detectable. E. faecalis was often present in primary endodontic infections, albeit in low numbers.
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Affiliation(s)
- S V van der Waal
- Department of Cariology, Endodontology, Pedodontology, Academic Centre for Dentistry Amsterdam (ACTA), Amsterdam, The Netherlands.,Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), Amsterdam, The Netherlands
| | - T Connert
- Department of Periodontology, Endodontology and Cariology, University of Basel, Basel, Switzerland
| | - W Crielaard
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), Amsterdam, The Netherlands
| | - J J de Soet
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), Amsterdam, The Netherlands
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97
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Antibacterial and residual antimicrobial activities against Enterococcus faecalis biofilm: A comparison between EDTA, chlorhexidine, cetrimide, MTAD and QMix. Sci Rep 2015; 5:12944. [PMID: 26245711 PMCID: PMC4526883 DOI: 10.1038/srep12944] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 07/13/2015] [Indexed: 11/14/2022] Open
Abstract
We compared the antibacterial and residual antimicrobial activities of five root canal irrigants (17% EDTA,2% chlorhexidine,0.2% cetrimide, MTAD, and QMix) in a model of Enterococcus faecalis biofilm formation. Sixty dentin blocks with 3-week E. faecalis biofilm were divided into six equal groups and flushed with irrigant for 2 min or left untreated. A blank control group was also established. Antibacterial activities of the irrigants were evaluated by counting colony forming units. To test residual antimicrobial activities, 280 dentin blocks were divided into seven equal groups and flushed with irrigant for 2 min or left untreated and then incubated with E. faecalis suspension for 48 h, or used as a blank. No bacteria were observed in the blank control group. The number of viable E. faecalis was significantly fewer in the irrigant-treated groups compared with the untreated control (P < 0.05). Among the five irrigants, QMix had the strongest antibacterial activity. Residual antimicrobial activities of CHX were significantly higher at 12 h, 24 h and 36 h compared to untreated control (P < 0.05). All five root canal irrigants were effective to some extent against E. faecalis, but QMix and CHX had the strongest, and CHX the longest (up to 36 h), antimicrobial activity.
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Di Santi BT, Ribeiro MB, Endo MS, Gomes BPFDA. Avaliação da suscetibilidade antimicrobiana de bactérias anaeróbias facultativas isoladas de canais radiculares de dentes com insucesso endodôntico frente aos antibióticos de uso sistêmico. REVISTA DE ODONTOLOGIA DA UNESP 2015. [DOI: 10.1590/1807-2577.0060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
<title>Resumo</title><sec><title>Introdução</title><p>Bactérias associadas ao insucesso do tratamento endodôntico são capazes de adquirir e expressar resistência aos agentes antimicrobianos comumente empregados para tratar infecções, o que torna necessário, em determinadas situações, a realização de testes laboratoriais para detectar a resistência ou a suscetibilidade antimicrobiana desses micro-organismos.</p></sec><sec><title>Objetivo</title><p>avaliar a suscetibilidade antimicrobiana das cepas de <italic>Enterococcus faecalis</italic>, <italic>Enterococcus faecium</italic>, <italic>Actinomyces viscosus</italic> e <italic>Staphylococcus aureus</italic> isoladas de canais radiculares de dentes com insucesso endodôntico.</p></sec><sec><title>Material e método</title><p>Cepas clínicas de <italic>Enterococcus faecalis</italic> (n=3), <italic>Enterococcus faecium</italic> (n=3), <italic>Actinomyces viscosus</italic> (n=3) e <italic>Staphylococcus aureus</italic> (n=3), coletadas in vivo de canais radiculares com insucesso endodôntico, foram testadas quanto à suscetibilidade antimicrobiana por meio do método E-test em duplicata, utilizando os antibióticos: Amoxicilina (AC), Rifampicina (RI), Moxifloxacina (MX), Vancomicina (VA), Tetraciclina (TC), Ciprofloxacina (CI), Cloranfenicol (CL), Benzilpenicilina (PG), Amoxicilina + ácido clavulânico (XL), Doxiciclina (DC), Eritromicina (EM) e Azitromicina (AZ).</p></sec><sec><title>Resultado</title><p>Todas as cepas clínicas testadas foram suscetíveis aos antibióticos AC, XL, PG, DC, MX, TC e VA. Todos os isolados das espécies de <italic>S. aureus</italic> foram suscetíveis aos 12 antibióticos testados. As cepas de <italic>E. faecalis</italic>, <italic>E. faecium</italic> e <italic>A. viscosus</italic> mostraram padrão de suscetibilidade intermediário contra EM. Algumas cepas de <italic>E. faecalis</italic> e <italic>E. faecium</italic> foram resistentes a AZ e RI.</p></sec><sec><title>Conclusão</title><p>As cepas clínicas isoladas dos canais radiculares de dentes com insucesso endodôntico mostraram perfis diferentes de suscetibilidade antimicrobiana e nenhum isolado de <italic>E. faecalis</italic> e <italic>E. faecium</italic>apresentou-se suscetível a AZ e EM.</p></sec>
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Brittan JL, Sprague SV, Huntley SP, Bell CNA, Jenkinson HF, Love RM. Collagen-like peptide sequences inhibit bacterial invasion of root dentine. Int Endod J 2015; 49:462-70. [DOI: 10.1111/iej.12474] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2014] [Accepted: 05/24/2015] [Indexed: 11/26/2022]
Affiliation(s)
- J. L. Brittan
- School of Oral and Dental Sciences; University of Bristol; Bristol UK
| | - S. V. Sprague
- School of Oral and Dental Sciences; University of Bristol; Bristol UK
| | - S. P. Huntley
- School of Oral and Dental Sciences; University of Bristol; Bristol UK
| | - C. N. A. Bell
- School of Oral and Dental Sciences; University of Bristol; Bristol UK
| | - H. F. Jenkinson
- School of Oral and Dental Sciences; University of Bristol; Bristol UK
| | - R. M. Love
- Department of Oral Rehabilitation; University of Otago; Dunedin New Zealand
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Koruyucu M, Topcuoglu N, Tuna EB, Ozel S, Gencay K, Kulekci G, Seymen F. An assessment of antibacterial activity of three pulp capping materials on Enterococcus faecalis by a direct contact test: An in vitro study. Eur J Dent 2015; 9:240-245. [PMID: 26038657 PMCID: PMC4439853 DOI: 10.4103/1305-7456.156837] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Objective: The aim of this in vitro study was to evaluate antimicrobial activities of three different pulp capping materials; Biodentine, mineral trioxide aggregate (MTA) Angelus, and Dycal against Enterococcus faecalis and their durability with time. Materials and Methods: Direct contact test was used for the assessment. Three sets of sealers were mixed and placed on microtiter plate wells: One set was used within 20 min of recommended setting time while others were used after 24-h and 1-week. E. faecalis suspension was placed directly on the materials for 1 h and then transferred to another plate with fresh media. Nine wells of bacteria without the tested cements served as the positive control. One well of the tested cements without bacteria served as the negative control. Bacterial growth was evaluated by a temperature-controlled microplate spectrophotometer for 1-h intervals among 24 h. Data were analyzed using Kruskal–Wallis test. Results: All tested materials showed less bacterial density than the control group. MTA, Biodentine, and Dycal showed significantly higher bacterial density than the control group in freshly mixed samples (P < 0.05). And MTA showed significantly higher antibacterial activity than Dycal (P < 0.05). In 24 h, materials did not show any differences (P > 0.05). MTA and Biodentine samples showed significant differences than Dycal; MTA also showed higher antibacterial activity than control in 1-week samples (P < 0.05). Conclusion: While freshly mixed MTA showed the best antibacterial activity over time, Biodentine had shown similar antibacterial activity to MTA.
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Affiliation(s)
- Mine Koruyucu
- Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul, Turkiye
| | - Nursen Topcuoglu
- Department of Microbiology, Faculty of Dentistry, Istanbul University, Istanbul, Turkiye
| | - E Bahar Tuna
- Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul, Turkiye
| | - Sevda Ozel
- Department of Biostatistics and Medical Informatics, Faculty of Medicine, Istanbul University, Istanbul, Turkiye
| | - Koray Gencay
- Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul, Turkiye
| | - Guven Kulekci
- Department of Microbiology, Faculty of Dentistry, Istanbul University, Istanbul, Turkiye
| | - Figen Seymen
- Department of Pedodontics, Faculty of Dentistry, Istanbul University, Istanbul, Turkiye
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