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Xu Y, Mou J, Dai J. VMT/ACP/Dextran composite nanosheets against dental caries through promoting mineralization of dentin tubules, pH buffering, and antibacterial. J Nanobiotechnology 2024; 22:490. [PMID: 39153990 PMCID: PMC11330022 DOI: 10.1186/s12951-024-02709-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 07/05/2024] [Indexed: 08/19/2024] Open
Abstract
Dental caries is a worldwide public healthcare concern, and is closely related to the acidic environment that caused by bacterial decomposition of food. In this study, a two-step ion exchange liquid-phase stripping method was applied to strip out vermiculite (VMT) nanosheets, then amorphous calcium phosphate (ACP) and dextran were inserted between the VMT nanosheets interlayer to obtain a composite two-dimension nanosheets (VMT/ACP/Dextran). VMT/ACP/Dextran composite nanosheets exhibited excellent biocompatibility and could provide exogenous Ca2+and PO43- from ACP, provide SiO44-, Mg2+, Fe2+ and obtain buffering pH and antibacterial properties from VMT, as well as improve suspension stability and targeting Streptococcus mutans through glucan. The in vitro study showed that the composite materials could promote the mineralization and sealing of dentin tubules by releasing active ions, buffer pH 4.5 (a value close to the pH in the dental plaque environment) to pH 6.6-7.1 (values close to the pH in human saliva) through ion exchange, and exert antibacterial effects by targeting Streptococcus mutans and exerting oxidase like and peroxidase like activities to produce reactive oxygen species (ROS). The in vivo animal study showed that daily cleaning teeth using VMT/ACP/Dextran composite nanosheets could effectively reduce the incidence rate and severity of dental caries in rats. Taking together, the developed VMT/ACP/Dextran composite nanosheets, which integrated the excellent properties of VMT, ACP and dextran, can effectively prevent dental caries through a combination of factors such as buffering acids, antibacterial properties, and promoting calcification, and may be used as an active ingredient for daily oral hygiene or filling materials to prevent and treat dental caries.
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Affiliation(s)
- Yanting Xu
- Department of Oral and Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, College of Stomatology, National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, National Clinical Research Center for Oral Diseases, No.639 Zhizaoju Road, Shanghai, 200011, China
| | - Juan Mou
- The Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key College of Chemistry and Materials Science, Shanghai Normal University, Shanghai, 200234, China.
| | - Jiewen Dai
- Department of Oral and Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, College of Stomatology, National Center for Stomatology, Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, National Clinical Research Center for Oral Diseases, No.639 Zhizaoju Road, Shanghai, 200011, China.
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Weissheimer T, Pinto KP, da Silva EJNL, Hashizume LN, da Rosa RA, Só MVR. Disinfectant effectiveness of chlorhexidine gel compared to sodium hypochlorite: a systematic review with meta-analysis. Restor Dent Endod 2023; 48:e37. [PMID: 38053784 PMCID: PMC10695732 DOI: 10.5395/rde.2023.48.e37] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/25/2023] [Accepted: 09/07/2023] [Indexed: 12/07/2023] Open
Abstract
This study aimed to compare the disinfectant ability of chlorhexidine (CHX) gel and sodium hypochlorite (NaOCl). Systematic searches were conducted from inception until December 8th, 2022 (MEDLINE/PubMed, Cochrane Library, Web of Science, Scopus, Embase, and Grey Literature databases). Only randomized clinical trials were included. The revised Cochrane risk of bias tools for randomized trials were used to assess the quality of studies. Meta-analyses were performed. The overall quality of evidence was assessed through the Grading of Recommendations Assessment, Development, and Evaluation tool. Six studies were included. Five had a low risk of bias and 1 had some concerns. Three studies assessed bacterial reduction. Two were included in the meta-analysis for bacterial reduction (mean difference, 75.03 [confidence interval, CI, -271.15, 421.22], p = 0.67; I2 = 74%); and 3 in the meta-analysis for cultivable bacteria after chemomechanical preparation (odds ratio, 1.03 [CI, 0.20, 5.31], P = 0.98; I2 = 49%). Five studies assessed endotoxin reduction. Three were included in a meta-analysis (mean difference, 20.59 [CI, -36.41, 77.59], p = 0.48; I2 = 74%). There seems to be no difference in the disinfectant ability of CHX gel and NaOCl, but further research is necessary.
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Affiliation(s)
- Theodoro Weissheimer
- Department of Endodontics, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Karem Paula Pinto
- Department of Endodontics, School of Dentistry, Rio de Janeiro State University (UERJ), Rio de Janeiro, RJ, Brazil
| | - Emmanuel João Nogueira Leal da Silva
- Department of Endodontics, School of Dentistry, Rio de Janeiro State University (UERJ), Rio de Janeiro, RJ, Brazil
- Department of Endodontics, School of Dentistry, Grande Rio University (UNIGRANRIO), Rio de Janeiro, RJ, Brazil
| | - Lina Naomi Hashizume
- Department of Preventive and Social Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Ricardo Abreu da Rosa
- Department of Endodontics, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Marcus Vinicius Reis Só
- Department of Endodontics, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
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Gomes BPFA, Aveiro E, Kishen A. Irrigants and irrigation activation systems in Endodontics. Braz Dent J 2023; 34:1-33. [PMID: 37909632 PMCID: PMC10642269 DOI: 10.1590/0103-6440202305577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 06/12/2023] [Indexed: 11/03/2023] Open
Abstract
Root canal infections are typically polymicrobial and involve strong bacterial interactions. The goal of endodontic treatment is to remove infected content from the root canal system to allow the healing of a pre-existing periapical lesion or to prevent infection of the periradicular tissues. Instrumentation alone is not capable of touching all of the root canal walls. Therefore, the irrigation process is an essential step in the endodontic treatment. However, due to the complex anatomy of the root canal system, this cleaning is very challenging. Although syringe and needle irrigation associated with the use of chemical substances is still the most used method, it does not guarantee optimal cleaning of the root canals. As a result, not only alternative irrigating substances but also numerous activation systems - which are technologies that aim to optimize the action of irrigating substances, both chemically and physically - have been developed. This work aimed to review the characteristics of both classic and current alternatives of irrigating substances and irrigation activation systems.
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Affiliation(s)
- Brenda P. F. A. Gomes
- Department of Restorative Dentistry, Division of Endodontics,
Piracicaba Dental School - State University of Campinas, UNICAMP, Brazil
| | - Emelly Aveiro
- Department of Restorative Dentistry, Division of Endodontics,
Piracicaba Dental School - State University of Campinas, UNICAMP, Brazil
| | - Anil Kishen
- Department of Dentistry, University of Toronto, Canada
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Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: An update for 2017-2018. MASS SPECTROMETRY REVIEWS 2023; 42:227-431. [PMID: 34719822 DOI: 10.1002/mas.21721] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 07/26/2021] [Accepted: 07/26/2021] [Indexed: 06/13/2023]
Abstract
This review is the tenth update of the original article published in 1999 on the application of matrix-assisted laser desorption/ionization mass spectrometry (MALDI) mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2018. Also included are papers that describe methods appropriate to glycan and glycoprotein analysis by MALDI, such as sample preparation techniques, even though the ionization method is not MALDI. Topics covered in the first part of the review include general aspects such as theory of the MALDI process, new methods, matrices, derivatization, MALDI imaging, fragmentation and the use of arrays. The second part of the review is devoted to applications to various structural types such as oligo- and poly-saccharides, glycoproteins, glycolipids, glycosides, and biopharmaceuticals. Most of the applications are presented in tabular form. The third part of the review covers medical and industrial applications of the technique, studies of enzyme reactions, and applications to chemical synthesis. The reported work shows increasing use of combined new techniques such as ion mobility and highlights the impact that MALDI imaging is having across a range of diciplines. MALDI is still an ideal technique for carbohydrate analysis and advancements in the technique and the range of applications continue steady progress.
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Affiliation(s)
- David J Harvey
- Nuffield Department of Medicine, Target Discovery Institute, University of Oxford, Oxford, UK
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Arruda-Vasconcelos R, Barbosa-Ribeiro M, Louzada LM, Lemos BIN, de-Jesus-Soares A, Ferraz CCR, Almeida JFA, Marciano MA, Gomes BPFA. Efficacy of 6% Sodium Hypochlorite on Infectious Content of Teeth with Symptomatic Irreversible Pulpitis. J Endod 2021; 48:179-189. [PMID: 34921849 DOI: 10.1016/j.joen.2021.11.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 10/05/2021] [Accepted: 11/07/2021] [Indexed: 12/15/2022]
Abstract
INTRODUCTION The objective of this study was to monitor the effects of chemomechanical preparation (CMP) performed with 6% sodium hypochlorite and calcium hydroxide-based intracanal medication (ICM) on the levels and diversity of bacteria, endotoxins (LPS) and lipoteichoic acid (LTA) in root canals of teeth with symptomatic irreversible pulpitis. METHODS Samples were collected from ten teeth with symptomatic irreversible pulpitis before CMP (S1), after CMP (S2) and after ICM (S3). The levels of bacteria, LPS and LTA were assessed by using checkerboard DNA-DNA hybridisation, LAL Pyrogent 5000 and enzyme linked immunosorbent assay (ELISA), respectively. Wilcoxon's test, repeated measures ANOVA and Tukey's post-hoc test were used for statistical analysis at a significance level of 5%. RESULTS Forty species were detected at S1. Two species were eliminated after CMP and five after ICM. Resistant and pain-related species were detected in the root canals. Higher levels of culturable bacteria were detected at S1. However, CMP and ICM effectively reduced the microbial load in the root canals. Higher levels of LPS and LTA were detected at S1. CMP was effective in reducing both LPS and LTA (P < 0.05). ICM produced additional reduction in the levels of LPS (P > 0.05) and LTA (P < 0.05). CONCLUSION Chemomechanical preparation using 6% sodium hypochlorite and calcium hydroxide-based intracanal medication were effective in reducing the levels of bacteria, endotoxins and lipoteichoic acid in teeth with vital pulp and irreversibly inflamed pulp.
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Affiliation(s)
- Rodrigo Arruda-Vasconcelos
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Marlos Barbosa-Ribeiro
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil; School of Dentistry, University of Pernambuco (UPE), Arcoverde, PE, Brazil
| | - Lidiane M Louzada
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Beatriz I N Lemos
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Adriana de-Jesus-Soares
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Caio C R Ferraz
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - José F A Almeida
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Marina A Marciano
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Brenda P F A Gomes
- Department of Restorative Dentistry, Division of Endodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, SP, Brazil.
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Nascimento GG, Rabello DGD, Corazza BJM, Gomes APM, Silva EG, Martinho FC. Comparison of the effectiveness of single- and multiple-sessions disinfection protocols against endotoxins in root canal infections: systematic review and meta-analysis. Sci Rep 2021; 11:1226. [PMID: 33441646 PMCID: PMC7806761 DOI: 10.1038/s41598-020-79300-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 12/07/2020] [Indexed: 12/29/2022] Open
Abstract
This systematic review (SR) addressed the following common clinical question: What is more effective in reducing or eliminating endotoxin in endodontic infections—single or multiple-session treatments using calcium hydroxide medications? Literature searches of Medline/PubMed, Embase, Cochrane Library, Scielo, Science Direct, Web of Knowledge, Scopus, and Google Scholar databases. Two reviewers independently assessed the eligibility for inclusion, extracted data, and evaluated the quality of the studies using the risk of bias tools. Electronic searches resulted in 358 articles, of which 32 studies were included for full-text assessment, and nine were included in this review. Meta-analysis pooling all the nine studies revealed lower levels of endotoxin for multiple-session treatment (P < 0.001). The sub-group analysis indicated no difference between single-session and 7 days of Ca(OH)2 medication (SMD − 0.32; P = 0.22). However, 14-days (I2 = 80.5%, P < 0.001) and 30-days (I2 = 78.9%, P < 0.01) of Ca(OH)2 medication was more effective than single-session treatment (both, p < 0.001). Overall, Overall, this SR provides evidence to support that multiple-session disinfection protocols with the placement of Ca(OH)2 medications are more effective in reducing the levels of endotoxin from root canal infections compared to single-session when applied for 14 and 30 days.
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Affiliation(s)
- Gustavo G Nascimento
- Section of Periodontology, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
| | - Diego G D Rabello
- Endodontic Division, Department of Restorative Dentistry, Institute of Science and Technology, São Paulo State University, São José dos Campos, São Paulo, Brazil
| | - Bruna J M Corazza
- Endodontic Division, Department of Restorative Dentistry, Institute of Science and Technology, São Paulo State University, São José dos Campos, São Paulo, Brazil
| | - Ana P M Gomes
- Endodontic Division, Department of Restorative Dentistry, Institute of Science and Technology, São Paulo State University, São José dos Campos, São Paulo, Brazil
| | - Eduardo G Silva
- Department of Social and Pediatric Dentistry, Institute of Science and Technology, São Paulo State University, São José dos Campos, São Paulo, Brazil
| | - Frederico C Martinho
- Endodontic Division, Department of Advanced Oral Sciences and Therapeutics, School of Dentistry, University of Maryland, Baltimore, MD, USA.
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Photosensitizers attenuate LPS-induced inflammation: implications in dentistry and general health. Lasers Med Sci 2020; 36:913-926. [PMID: 33150475 DOI: 10.1007/s10103-020-03180-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 10/28/2020] [Indexed: 10/23/2022]
Abstract
Antimicrobial photodynamic therapy (aPDT) is a complementary therapeutic modality for periodontal and endodontic diseases, in which Gram-negative bacteria are directly involved. Currently, there are few evidences regarding the effects of aPDT on bacterial components such as lipopolysaccharide (LPS) and it would represent a major step forward in the clinical use of this therapy. In this context, this study aimed to evaluate the efficacy of different photosensitizers (PSs) used in aPDT in LPS inhibition. Four PSs were used in this study: methylene blue (MB), toluidine blue (TBO), new methylene blue (NMB), and curcumin (CUR). Different approaches to evaluate LPS interaction with PSs were used, such as spectrophotometry, Limulus amebocyte lysate (LAL) test, functional assays using mouse macrophages, and an in vivo model of LPS injection. Spectrophotometry showed that LPS decreased the absorbance of all PSs used, indicating interactions between the two species. LAL assay revealed significant differences in LPS concentrations upon pre-incubation with the different PSs. Interestingly, the inflammatory potential of LPS decreased after previous treatment with the four PSs, resulting in decreased secretion of inflammatory cytokines by macrophages. In vivo, pre-incubating curcumin with LPS prevented animals from undergoing septic shock within the established time. Using relevant models to study the inflammatory activity of LPS, we found that all PSs used in this work decreased LPS-induced inflammation, with a more striking effect observed for NMB and curcumin. These data advance the understanding of the mechanisms of LPS inhibition by PSs.
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Louzada LM, Arruda-Vasconcelos R, Duque TM, Casarin RC, Feres M, Gomes BP. Clinical Investigation of Microbial Profile and Levels of Endotoxins and Lipoteichoic Acid at Different Phases of the Endodontic Treatment in Teeth with Vital Pulp and Associated Periodontal Disease. J Endod 2020; 46:736-747. [DOI: 10.1016/j.joen.2020.02.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 02/11/2020] [Accepted: 02/15/2020] [Indexed: 12/13/2022]
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Machado CAD, Souza ACA, Loureiro C, Martinho FC, Cintra LTÂ, Dezan Junior E, Jacinto RDC. Comparison of two rotary systems in bacteria/lps removal from endodontic infections: randomized clinical trial. Braz Oral Res 2019; 33:e039. [DOI: 10.1590/1807-3107bor-2019.vol33.0039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 04/16/2019] [Indexed: 11/21/2022] Open
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Effectiveness of calcium hydroxide-based intracanal medication on infectious/inflammatory contents in teeth with post-treatment apical periodontitis. Clin Oral Investig 2018; 23:2759-2766. [DOI: 10.1007/s00784-018-2719-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Accepted: 10/17/2018] [Indexed: 02/07/2023]
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Neelakantan P, Herrera DR, Pecorari VGA, Gomes BPFA. Endotoxin levels after chemomechanical preparation of root canals with sodium hypochlorite or chlorhexidine: a systematic review of clinical trials and meta-analysis. Int Endod J 2018; 52:19-27. [DOI: 10.1111/iej.12963] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 06/06/2018] [Indexed: 11/28/2022]
Affiliation(s)
- P. Neelakantan
- Faculty of Dentistry; The University of Hong Kong; Hong Kong
| | - D. R. Herrera
- Department of Restorative Dentistry; Endodontics Division; Piracicaba Dental School; State University of Campinas-UNICAMP; Piracicaba SP Brazil
| | - V. G. A. Pecorari
- Dental Research Division; School of Dentistry; Paulista University; São Paulo SP Brazil
| | - B. P. F. A. Gomes
- Department of Restorative Dentistry; Endodontics Division; Piracicaba Dental School; State University of Campinas-UNICAMP; Piracicaba SP Brazil
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