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Research Article
The effect of using nanoparticles in bioactive glass on its antimicrobial properties
Maram Farouk Obeid, Kareim Moustafa El-Batouty, Mohammed Aslam
Restor Dent Endod 2021;46(4):e58.   Published online October 29, 2021
DOI: https://doi.org/10.5395/rde.2021.46.e58
AbstractAbstract PDFPubReaderePub
Objectives

This study addresses the effect of using nanoparticles (np) on the antimicrobial properties of bioactive glass (BAG) when used in intracanal medicaments against Enterococcus faecalis (E. faecalis) biofilms.

Materials and Methods

E. faecalis biofilms, grown inside 90 root canals for 21 days, were randomly divided into 4 groups according to the antimicrobial regimen followed (n = 20; BAG-np, BAG, calcium hydroxide [CaOH], and saline). After 1 week, residual live bacteria were quantified in terms of colony-forming units (CFU), while dead bacteria were assessed with a confocal laser scanning microscope.

Results

Although there was a statistically significant decrease in the mean CFU value among all groups, the nano-group performed the best. The highest percentage of dead bacteria was detected in the BAG-np group, with a significant difference from the BAG group.

Conclusions

The reduction of particle size and use of a nano-form of BAG improved the antimicrobial properties of the intracanal treatment of E. faecalis biofilms

Citations

Citations to this article as recorded by  
  • Size matters: radiation shielding superiority of borate glasses with nano vs. micro ZnO
    Aljawhara H. Almuqrin, M.I. Sayyed, M. Elsafi
    Nuclear Engineering and Technology.2025; : 103614.     CrossRef
  • Application of Nanomaterials in Endodontics
    Farzaneh Afkhami, Yuan Chen, Laurence J. Walsh, Ove A. Peters, Chun Xu
    BME Frontiers.2024;[Epub]     CrossRef
  • Antimicrobial efficacy of newly prepared nano-tricalcium silicate-58s bioactive glass-based endodontic sealer
    Nawal Atiya Al-Sabawi, Sawsan Hameed Al-Jubori
    Endodontology.2024;[Epub]     CrossRef
  • Antimicrobial Effects of Formulations of Various Nanoparticles and Calcium Hydroxide as Intra-canal Medications Against Enterococcus faecalis: A Systematic Review
    Seema H Bukhari, Dax Abraham, Shakila Mahesh
    Cureus.2024;[Epub]     CrossRef
  • Effect of nanoparticles on antibacterial efficacy of intracanal medicament: A scoping review
    Alpa Gupta, Arundeep Singh, Vivek Aggarwal
    Endodontology.2023; 35(4): 283.     CrossRef
  • Physical properties, marginal adaptation and bioactivity of an experimental mineral trioxide aggregate-like cement modified with bioactive materials
    Abigailt Flores-Ledesma, Adriana Tejeda-Cruz, María A. Moyaho-Bernal, Ana Wintergerst, Yoshamin A. Moreno-Vargas, Jacqueline A. Rodríguez-Chávez, Carlos E. Cuevas-Suárez, Kenya Gutiérrez-Estrada, Jesús A. Arenas-Alatorre
    Journal of Oral Science.2023; 65(2): 141.     CrossRef
  • Nanopartículas antimicrobianas en endodoncia: Revisión narrativa
    Gustavo Adolfo Tovar Rangel , Fanny Mildred González Sáenz , Ingrid Ximena Zamora Córdoba , Lina María García Zapata
    Revista Estomatología.2023;[Epub]     CrossRef
  • 265 View
  • 12 Download
  • 2 Web of Science
  • 7 Crossref
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Review Article
Silver nanoparticles in endodontics: recent developments and applications
Aysenur Oncu, Yan Huang, Gulin Amasya, Fatma Semra Sevimay, Kaan Orhan, Berkan Celikten
Restor Dent Endod 2021;46(3):e38.   Published online July 1, 2021
DOI: https://doi.org/10.5395/rde.2021.46.e38
AbstractAbstract PDFPubReaderePub

The elimination of endodontic biofilms and the maintenance of a leak-proof canal filling are key aspects of successful root canal treatment. Several materials have been introduced to treat endodontic disease, although treatment success is limited by the features of the biomaterials used. Silver nanoparticles (AgNPs) have been increasingly considered in dental applications, especially endodontics, due to their high antimicrobial activity. For the present study, an electronic search was conducted using MEDLINE (PubMed), the Cochrane Central Register of Controlled Trials (CENTRAL), Google Scholar, and EMBASE. This review provides insights into the unique characteristics of AgNPs, including their chemical, physical, and antimicrobial properties; limitations; and potential uses. Various studies involving different application methods of AgNPs were carefully examined. Based on previous clinical studies, the synthesis, means of obtaining, usage conditions, and potential cytotoxicity of AgNPs were evaluated. The findings indicate that AgNPs are effective antimicrobial agents for the elimination of endodontic biofilms.

Citations

Citations to this article as recorded by  
  • Scoping review on the genotoxicity of silver nanoparticles in endodontics: therapeutic saviors or genetic saboteurs?
    Galvin Sim Siang Lin, Widya Lestari, Mohd Haikal Muhamad Halil, Mohd Syafiq Abd Aziz
    Odontology.2025; 113(2): 457.     CrossRef
  • Bioceramics in Endodontics: Limitations and Future Innovations—A Review
    Peramune Arachchilage Amila Saman Prasad Kumara, Paul Roy Cooper, Peter Cathro, Maree Gould, George Dias, Jithendra Ratnayake
    Dentistry Journal.2025; 13(4): 157.     CrossRef
  • Antimicrobial Effects of Formulations of Various Nanoparticles and Calcium Hydroxide as Intra-canal Medications Against Enterococcus faecalis: A Systematic Review
    Seema H Bukhari, Dax Abraham, Shakila Mahesh
    Cureus.2024;[Epub]     CrossRef
  • The Push-Out Bond Strength, Surface Roughness, and Antimicrobial Properties of Endodontic Bioceramic Sealers Supplemented with Silver Nanoparticles
    Karla Navarrete-Olvera, Nereyda Niño-Martínez, Idania De Alba-Montero, Nuria Patiño-Marín, Facundo Ruiz, Horacio Bach, Gabriel-Alejandro Martínez-Castañón
    Molecules.2024; 29(18): 4422.     CrossRef
  • Synergistic bactericidal activity of chlorhexidine loaded on positively charged ionic liquid-protected silver nanoparticles as a root canal disinfectant against Enterococcus faecalis: An ex vivo study
    Abbas Abbaszadegan, Elham Tayebikhorami, Ahmad Gholami, Nazanin Bonyanpour, Bahar Asheghi, Sara Nikmanesh
    Journal of Ionic Liquids.2024; 4(2): 100117.     CrossRef
  • Improving the Antimicrobial Potency of Berberine for Endodontic Canal Irrigation Using Polymeric Nanoparticles
    Célia Marques, Liliana Grenho, Maria Helena Fernandes, Sofia A. Costa Lima
    Pharmaceutics.2024; 16(6): 786.     CrossRef
  • A narrative review on application of metal and metal oxide nanoparticles in endodontics
    Roohollah Sharifi, Ahmad Vatani, Amir Sabzi, Mohsen Safaei
    Heliyon.2024; 10(15): e34673.     CrossRef
  • The Effectiveness of Silver Nanoparticles Mixed with Calcium Hydroxide against Candida albicans: An Ex Vivo Analysis
    Maha Alghofaily, Jood Alfraih, Aljohara Alsaud, Norah Almazrua, Terrence S. Sumague, Sayed H. Auda, Fahd Alsalleeh
    Microorganisms.2024; 12(2): 289.     CrossRef
  • Evaluation of the efficacy of a novel disinfecting material on the surface topography of gutta-percha: An in vitro study
    KHanisha Reddy, Lekshmi Chandran, TMurali Mohan, K Sudha, DL Malini, Bonney Dominic
    Journal of Conservative Dentistry.2023; 26(1): 94.     CrossRef
  • Silver Nanoparticles and Their Therapeutic Applications in Endodontics: A Narrative Review
    Farzaneh Afkhami, Parisa Forghan, James L. Gutmann, Anil Kishen
    Pharmaceutics.2023; 15(3): 715.     CrossRef
  • Nanopartículas antimicrobianas en endodoncia: Revisión narrativa
    Gustavo Adolfo Tovar Rangel , Fanny Mildred González Sáenz , Ingrid Ximena Zamora Córdoba , Lina María García Zapata
    Revista Estomatología.2023;[Epub]     CrossRef
  • Functionalized Nanoparticles: A Paradigm Shift in Regenerative Endodontic Procedures
    Vinoo Subramaniam Ramachandran, Mensudar Radhakrishnan, Malathi Balaraman Ravindrran, Venkatesh Alagarsamy, Gowri Shankar Palanisamy
    Cureus.2022;[Epub]     CrossRef
  • 583 View
  • 17 Download
  • 8 Web of Science
  • 12 Crossref
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Research Articles
The effectiveness of the supplementary use of the XP-endo Finisher on bacteria content reduction: a systematic review and meta-analysis
Ludmila Smith de Jesus Oliveira, Rafaella Mariana Fontes de Bragança, Rafael Sarkis-Onofre, André Luis Faria-e-Silva
Restor Dent Endod 2021;46(3):e37.   Published online June 18, 2021
DOI: https://doi.org/10.5395/rde.2021.46.e37
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Objectives

This systematic review evaluated the efficacy of the supplementary use of the XP-endo Finisher on bacteria content reduction in the root canal system.

Materials and Methods

In-vitro studies evaluating the use of the XP-endo Finisher on bacteria content were searched in four databases in July 2020. Two authors independently screened the studies for eligibility. Data were extracted, and risk of bias was assessed. Data were meta-analyzed by using random-effects model to compare the effect of the supplementary use (experimental) or not (control) of the XP-endo Finisher on bacteria counting reduction, and results from different endodontic protocols were combined. Four studies met the inclusion criteria while 1 study was excluded from the meta-analysis due to its high risk of bias and outlier data. The 3 studies that made it to the meta-analysis had an unclear risk of bias for at least one criterion.

Results

No heterogeneity was observed among the results of the studies included in the meta-analysis. The study excluded from the meta-analysis assessing the bacteria counting deep in the dentin demonstrated further bacteria reduction upon the use of the XP-endo Finisher.

Conclusions

This systematic review found no evidence supporting the supplementary use of the XP-endo Finisher on further bacteria counting the reduction in the root canal.

Citations

Citations to this article as recorded by  
  • Characteristics and Effectiveness of XP‐Endo Files and Systems: A Narrative Review
    Sarah M. Alkahtany, Rana Alfadhel, Aseel AlOmair, Sarah Bin Durayhim, Kee Y. Kum
    International Journal of Dentistry.2024;[Epub]     CrossRef
  • Impact XP-endo finisher on the 1-year follow-up success of posterior root canal treatments: a randomized clinical trial
    Ludmila Smith de Jesus Oliveira, Fabricio Eneas Diniz de Figueiredo, Janaina Araújo Dantas, Maria Amália Gonzaga Ribeiro, Carlos Estrela, Manoel Damião Sousa-Neto, André Luis Faria-e-Silva
    Clinical Oral Investigations.2023; 27(12): 7595.     CrossRef
  • Comparative analysis of the effectiveness of modern irrigants activation techniques in the process of mechanical root canal system treatment (Literature review)
    Anatoliy Potapchuk, Vasyl Almashi, Arsenii Horzov, Victor Buleza
    InterConf.2023; (34(159)): 200.     CrossRef
  • Methodological quality assessment criteria for the evaluation of laboratory‐based studies included in systematic reviews within the specialty of Endodontology: A development protocol
    Venkateshbabu Nagendrababu, Paul V. Abbott, Christos Boutsioukis, Henry F. Duncan, Clovis M. Faggion, Anil Kishen, Peter E. Murray, Shaju Jacob Pulikkotil, Paul M. H. Dummer
    International Endodontic Journal.2022; 55(4): 326.     CrossRef
  • 309 View
  • 10 Download
  • 3 Web of Science
  • 4 Crossref
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A novel antimicrobial-containing nanocellulose scaffold for regenerative endodontics
Victoria Kichler, Lucas Soares Teixeira, Maick Meneguzzo Prado, Guilherme Colla, Daniela Peressoni Vieira Schuldt, Beatriz Serrato Coelho, Luismar Marques Porto, Josiane de Almeida
Restor Dent Endod 2021;46(2):e20.   Published online March 16, 2021
DOI: https://doi.org/10.5395/rde.2021.46.e20
AbstractAbstract PDFPubReaderePub
Objectives

The aim of this study was to evaluate bacterial nanocellulose (BNC) membranes incorporated with antimicrobial agents regarding cytotoxicity in fibroblasts of the periodontal ligament (PDLF), antimicrobial activity, and inhibition of multispecies biofilm formation.

Materials and Methods

The tested BNC membranes were BNC + 1% clindamycin (BNC/CLI); BNC + 0.12% chlorhexidine (BNC/CHX); BNC + nitric oxide (BNC/NO); and conventional BNC (BNC; control). After PDLF culture, the BNC membranes were positioned in the wells and maintained for 24 hours. Cell viability was then evaluated using the MTS calorimetric test. Antimicrobial activity against Enterococcus faecalis, Actinomyces naeslundii, and Streptococcus sanguinis (S. sanguinis) was evaluated using the agar diffusion test. To assess the antibiofilm activity, BNC membranes were exposed for 24 hours to the mixed culture. After sonicating the BNC membranes to remove the remaining biofilm and plating the suspension on agar, the number of colony-forming units (CFU)/mL was determined. Data were analyzed by 1-way analysis of variance and the Tukey, Kruskal-Wallis, and Dunn tests (α = 5%).

Results

PDLF metabolic activity after contact with BNC/CHX, BNC/CLI, and BNC/NO was 35%, 61% and 97%, respectively, compared to BNC. BNC/NO showed biocompatibility similar to that of BNC (p = 0.78). BNC/CLI showed the largest inhibition halos, and was superior to the other BNC membranes against S. sanguinis (p < 0.05). The experimental BNC membranes inhibited biofilm formation, with about a 3-fold log CFU reduction compared to BNC (p < 0.05).

Conclusions

BNC/NO showed excellent biocompatibility and inhibited multispecies biofilm formation, similarly to BNC/CLI and BNC/CHX.

Citations

Citations to this article as recorded by  
  • Topic: Perspectives on Success and Failure of Endodontic Treatments
    Ilma Robo, Manola Kelmendi, Eva Habazaj, Kleves Elezi, Rialda Xhizdari, Nevila Alliu
    SN Comprehensive Clinical Medicine.2025;[Epub]     CrossRef
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    Yasmin Alimardani, Esmaeel Mirzakhani, Fereshteh Ansari, Hadi Pourjafar, Nadia Sadeghi
    Cellulose.2024; 31(13): 7819.     CrossRef
  • Bacterial nanocelluloses as sustainable biomaterials for advanced wound healing and dressings
    Atefeh Zarepour, Bahar Gok, Yasemin Budama-Kilinc, Arezoo Khosravi, Siavash Iravani, Ali Zarrabi
    Journal of Materials Chemistry B.2024; 12(48): 12489.     CrossRef
  • Sulfated endospermic nanocellulose crystals prevent the transmission of SARS-CoV-2 and HIV-1
    Enrique Javier Carvajal-Barriga, Wendy Fitzgerald, Emilios K. Dimitriadis, Leonid Margolis, R. Douglas Fields
    Scientific Reports.2023;[Epub]     CrossRef
  • A Novel Approach for the Fabrication of 3D-Printed Dental Membrane Scaffolds including Antimicrobial Pomegranate Extract
    Hatice Karabulut, Songul Ulag, Basak Dalbayrak, Elif Arisan, Turgut Taskin, Mehmet Guncu, Burak Aksu, Alireza Valanezhad, Oguzhan Gunduz
    Pharmaceutics.2023; 15(3): 737.     CrossRef
  • Current advances of nanocellulose application in biomedical field
    M.Y. Leong, Y.L. Kong, M.Y. Harun, C.Y. Looi, W.F. Wong
    Carbohydrate Research.2023; 532: 108899.     CrossRef
  • Bacterial cellulose as a potential biopolymer in biomedical applications: a state-of-the-art review
    Prachi Shrivastav, Sheersha Pramanik, Gayatri Vaidya, Mohamed A. Abdelgawad, Mohammed M. Ghoneim, Ajeet Singh, Bassam M. Abualsoud, Larissa Souza Amaral, Mohammed A. S. Abourehab
    Journal of Materials Chemistry B.2022; 10(17): 3199.     CrossRef
  • Nanocelluloses as new generation materials: natural resources, structure-related properties, engineering nanostructures, and technical challenges
    Ahmed Barhoum, Vibhore K. Rastogi, Bhupender K. Mahur, Amit Rastogi, Fatehy M. Abdel-Haleem, Pieter Samyn
    Materials Today Chemistry.2022; 26: 101247.     CrossRef
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    Materials Today Communications.2022; 32: 104099.     CrossRef
  • 328 View
  • 9 Download
  • 11 Web of Science
  • 9 Crossref
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Review Article
Endodontic biofilms: contemporary and future treatment options
Yeon-Jee Yoo, Hiran Perinpanayagam, Soram Oh, A-Reum Kim, Seung-Hyun Han, Kee-Yeon Kum
Restor Dent Endod 2019;44(1):e7.   Published online January 31, 2019
DOI: https://doi.org/10.5395/rde.2019.44.e7
AbstractAbstract PDFPubReaderePub

Apical periodontitis is a biofilm-mediated infection. The biofilm protects bacteria from host defenses and increase their resistance to intracanal disinfecting protocols. Understanding the virulence of these endodontic microbiota within biofilm is essential for the development of novel therapeutic procedures for intracanal disinfection. Both the disruption of biofilms and the killing of their bacteria are necessary to effectively treat apical periodontitis. Accordingly, a review of endodontic biofilm types, antimicrobial resistance mechanisms, and current and future therapeutic procedures for endodontic biofilm is provided.

Citations

Citations to this article as recorded by  
  • Evaluation of Anti-Biofilm Property of Zirconium Oxide Nanoparticles on Streptococcus mutans and Enterococcus faecalis: An In Vitro Study
    Anu Priya Guruswamy Pandian, Anil Kumar Ramachandran, Priyanka Kodaganallur Pitchumani, Blessy Mathai, Davis C Thomas
    Cureus.2025;[Epub]     CrossRef
  • Self-Sacrificial Antibacterial Coating with Photothermal Response for Inhibiting Implant Infection
    Jinglin Zhang, Aijian Cao, Lizhen Chen, Dongliang Huo, Jingxian Zhang, Langhuan Huang, Shaozao Tan
    ACS Applied Nano Materials.2024; 7(23): 26907.     CrossRef
  • Biofilm in Endodontic Infection and its Advanced Therapeutic Options – An Updated Review
    Srilekha Jayakumar, Dinesh Sridhar, Bindu M. John, Karthikeyan Arumugam, Prashanth Ponnusamy, Hema Pulidindi
    Journal of Pharmacy and Bioallied Sciences.2024; 16(Suppl 2): S1104.     CrossRef
  • Analysis of the chemical interaction of polyhexanide with endodontic irrigants
    Z. S. Zurab, Yu. A. Generalova, A. A. Kulikova, A. Yu. Umarov, F. V. Badalov, A. Wehbe, E. M. Kakabadze
    Endodontics Today.2024; 22(4): 319.     CrossRef
  • In vitro evaluation of three engineered multispecies endodontic biofilms on a dentinal disk substrate
    Wajih Hage, Dolla Karam Sarkis, Mireille Kallasy, May Mallah, Carla Zogheib
    Biomaterial Investigations in Dentistry.2023;[Epub]     CrossRef
  • In vitro evaluation of enterococcus faecalis growth in different conditions on dentinal substrate
    Wajih Hage, Dolla Karam Sarkis, Mireille Kallassy, May Mallah, Carla Zogheib
    Biomaterial Investigations in Dentistry.2023;[Epub]     CrossRef
  • Bacteria associated with apical periodontitis promotes in vitro the differentiation of macrophages to osteoclasts
    A. P. Torres-Monjarás, R. Sánchez-Gutiérrez, B. Hernández-Castro, L. González-Baranda, D. L. Alvarado-Hernández, A. Pozos-Guillén, A. Muñoz-Ruiz, V. Méndez-González, R. González-Amaro, M. Vitales-Noyola
    Clinical Oral Investigations.2023; 27(6): 3139.     CrossRef
  • Antimicrobial efficacy of Kerr pulp canal sealer (EWT) in combination with 10% amoxicillin on Enterococcus faecalis: A confocal laser scanning microscopic study
    Madhureema De Sarkar, Kundabala Mala, Suchitra Shenoy Mala, Shama Prasada Kabekkodu, Srikant Natarajan, Neeta Shetty, Priyanka Madhav Kamath, Manuel Thomas
    F1000Research.2023; 12: 725.     CrossRef
  • Antimicrobial efficacy of Kerr pulp canal sealer (EWT) in combination with 10% amoxicillin on Enterococcus faecalis: A confocal laser scanning microscopic study
    Madhureema De Sarkar, Kundabala Mala, Suchitra Shenoy Mala, Shama Prasada Kabekkodu, Srikant Natarajan, Neeta Shetty, Priyanka Madhav Kamath, Manuel Thomas
    F1000Research.2023; 12: 725.     CrossRef
  • Combined effect of electrical energy and graphene oxide on Enterococcus faecalis biofilms
    Myung-Jin LEE, Mi-Ah KIM, Kyung-San MIN
    Dental Materials Journal.2023; 42(6): 844.     CrossRef
  • Innovative Curved-Tip Reactor for Non-Thermal Plasma and Plasma-Treated Water Generation: Synergistic Impact Comparison with Sodium Hypochlorite in Dental Root Canal Disinfection
    Raúl Arguello-Sánchez, Régulo López-Callejas, Benjamín Gonzalo Rodríguez-Méndez, Rogelio Scougall-Vilchis, Ulises Velázquez-Enríquez, Antonio Mercado-Cabrera, Rosendo Peña-Eguiluz, Raúl Valencia-Alvarado, Carlo Eduardo Medina-Solís
    Materials.2023; 16(22): 7204.     CrossRef
  • Impact of antimicrobial photodynamic therapy on the bond-strength and penetration of endodontic sealers: A systematic review
    Khalid H Almadi
    Photodiagnosis and Photodynamic Therapy.2023; 41: 103249.     CrossRef
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    Yajing Hou, Liu Wang, Lan Zhang, Xuelian Tan, Dingming Huang, Dongzhe Song
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    Rodrigo Arruda-Vasconcelos, Marlos Barbosa-Ribeiro, Lidiane M. Louzada, Beatriz I.N. Lemos, Adriana de-Jesus-Soares, Caio C.R. Ferraz, José F.A. Almeida, Marina A. Marciano, Brenda P.F. A. Gomes
    Journal of Endodontics.2022; 48(2): 179.     CrossRef
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    Davy Aubeux, Ove A. Peters, Sepanta Hosseinpour, Solène Tessier, Valérie Geoffroy, Fabienne Pérez, Alexis Gaudin
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    Daniela Alejandra Cusicanqui Méndez, Maricel Rosario Cardenas Cuéllar, Victor Feliz Pedrinha, Evelyn Giuliana Velásquez Espedilla, Flaviana Bombarda de Andrade, Patrícia de Almeida Rodrigues, Thiago Cruvinel
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    Prasanna Dahake, Nilima Thosar
    Journal of Islamic Dental Association of IRAN.2021; 33(3): 58.     CrossRef
  • Effect of using diode laser on Enterococcus faecalis and its lipoteichoic acid (LTA) in chronic apical periodontitis
    Zhaohui Zou, Junu Bhandari, Baiyan Xiao, Xiaoyue Liang, Yu Zhang, Guohui Yan
    Lasers in Medical Science.2021; 36(5): 1059.     CrossRef
  • Prevalence of Bacteria of Genus Actinomyces in Persistent Extraradicular Lesions—Systematic Review
    Mario Dioguardi, Vito Crincoli, Luigi Laino, Mario Alovisi, Diego Sovereto, Lorenzo Lo Muzio, Giuseppe Troiano
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  • Evaluation of in vitro biofilm elimination of Enterococcus faecalis using a continuous ultrasonic irrigation device
    Jennifer Galván-Pacheco, Marlen Vitales-Noyola, Ana M. González-Amaro, Heriberto Bujanda-Wong, Antonio Aragón-Piña, Verónica Méndez-González, Amaury Pozos-Guillén
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  • Comparison of the use of d-enantiomeric and l-enantiomeric antimicrobial peptides incorporated in a calcium-chelating irrigant against Enterococcus faecalis root canal wall biofilms
    Wei-hu Ye, Lara Yeghiasarian, Christopher W. Cutler, Brian E. Bergeron, Stephanie Sidow, Hockin H.K. Xu, Li-na Niu, Jing-zhi Ma, Franklin R. Tay
    Journal of Dentistry.2019; 91: 103231.     CrossRef
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  • 23 Crossref
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Research Articles
Inhibition of nicotine-induced Streptococcus mutans biofilm formation by salts solutions intended for mouthrinses
Abdulrahman A. Balhaddad, Mary Anne S. Melo, Richard L. Gregory
Restor Dent Endod 2019;44(1):e4.   Published online January 16, 2019
DOI: https://doi.org/10.5395/rde.2019.44.e4
AbstractAbstract PDFPubReaderePub
Objectives

Biofilm formation is critical to dental caries initiation and development. The aim of this study was to investigate the effects of nicotine exposure on Streptococcus mutans (S. mutans) biofilm formation concomitantly with the inhibitory effects of sodium chloride (NaCl), potassium chloride (KCl) and potassium iodide (KI) salts. This study examined bacterial growth with varying concentrations of NaCl, KCl, and KI salts and nicotine levels consistent with primary levels of nicotine exposure.

Materials and Methods

A preliminary screening experiment was performed to investigate the appropriate concentrations of NaCl, KCl, and KI to use with nicotine. With the data, a S. mutans biofilm growth assay was conducted using nicotine (0–32 mg/mL) in Tryptic Soy broth supplemented with 1% sucrose with and without 0.45 M of NaCl, 0.23 M of KCl, and 0.113 M of KI. The biofilm was stained with crystal violet dye and the absorbance measured to determine biofilm formation.

Results

The presence of 0.45 M of NaCl, 0.23 M of KCl, and 0.113 M of KI significantly inhibited (p < 0.05) nicotine-induced S. mutans biofilm formation by 52%, 79.7%, and 64.1%, respectively.

Conclusions

The results provide additional evidence regarding the biofilm-enhancing effects of nicotine and demonstrate the inhibitory influence of these salts in reducing the nicotine-induced biofilm formation. A short-term exposure to these salts may inhibit S. mutans biofilm formation.

Citations

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  • Tobacco‐enhanced biofilm formation by Porphyromonas gingivalis and other oral microbes
    Jinlian Tan, Gwyneth J. Lamont, David A. Scott
    Molecular Oral Microbiology.2024; 39(5): 270.     CrossRef
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    Adaias Oliveira Matos, Valentim Adelino Ricardo Barão, Richard Lee Gregory
    Brazilian Journal of Oral Sciences.2023;[Epub]     CrossRef
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    Abdulrahman A. Balhaddad, Rasha N. AlSheikh
    BDJ Open.2023;[Epub]     CrossRef
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    Akanksha Vishwakarma, Digvijay Verma
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    A. J. Rivera, R. E. Tyx
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Antifungal effects of synthetic human β-defensin 3-C15 peptide
Sang-Min Lim, Ki-Bum Ahn, Christine Kim, Jong-Won Kum, Hiran Perinpanayagam, Yu Gu, Yeon-Jee Yoo, Seok Woo Chang, Seung Hyun Han, Won-Jun Shon, Woocheol Lee, Seung-Ho Baek, Qiang Zhu, Kee-Yeon Kum
Restor Dent Endod 2016;41(2):91-97.   Published online March 17, 2016
DOI: https://doi.org/10.5395/rde.2016.41.2.91
AbstractAbstract PDFPubReaderePub
Objectives

The purpose of this ex vivo study was to compare the antifungal activity of a synthetic peptide consisting of 15 amino acids at the C-terminus of human β-defensin 3 (HBD3-C15) with calcium hydroxide (CH) and Nystatin (Nys) against Candida albicans (C. albicans) biofilm.

Materials and Methods

C. albicans were grown on cover glass bottom dishes or human dentin disks for 48 hr, and then treated with HBD3-C15 (0, 12.5, 25, 50, 100, 150, 200, and 300 µg/mL), CH (100 µg/mL), and Nys (20 µg/mL) for 7 days at 37℃. On cover glass, live and dead cells in the biomass were measured by the FilmTracer Biofilm viability assay, and observed by confocal laser scanning microscopy (CLSM). On dentin, normal, diminished and ruptured cells were observed by field-emission scanning electron microscopy (FE-SEM). The results were subjected to a two-tailed t-test, a one way analysis variance and a post hoc test at a significance level of p = 0.05.

Results

C. albicans survival on dentin was inhibited by HBD3-C15 in a dose-dependent manner. There were fewer aggregations of C. albicans in the groups of Nys and HBD3-C15 (≥ 100 µg/mL). CLSM showed C. albicans survival was reduced by HBD3-C15 in a dose dependent manner. Nys and HBD3-C15 (≥ 100 µg/mL) showed significant fungicidal activity compared to CH group (p < 0.05).

Conclusions

Synthetic HBD3-C15 peptide (≥ 100 µg/mL) and Nys exhibited significantly higher antifungal activity than CH against C. albicans by inhibiting cell survival and biofilm.

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Effect of organic acids in dental biofilm on microhardness of a silorane-based composite
Sedighe Sadat Hashemikamangar, Seyed Jalal Pourhashemi, Mohammad Talebi, Nazanin Kiomarsi, Mohammad Javad Kharazifard
Restor Dent Endod 2015;40(3):188-194.   Published online June 2, 2015
DOI: https://doi.org/10.5395/rde.2015.40.3.188
AbstractAbstract PDFPubReaderePub
Objectives

This study evaluated the effect of lactic acid and acetic acid on the microhardness of a silorane-based composite compared to two methacrylate-based composite resins.

Materials and Methods

Thirty disc-shaped specimens each were fabricated of Filtek P90, Filtek Z250 and Filtek Z350XT. After measuring of Vickers microhardness, they were randomly divided into 3 subgroups (n = 10) and immersed in lactic acid, acetic acid or distilled water. Microhardness was measured after 48 hr and 7 day of immersion. Data were analyzed using repeated measures ANOVA (p < 0.05). The surfaces of two additional specimens were evaluated using a scanning electron microscope (SEM) before and after immersion.

Results

All groups showed a reduction in microhardness after 7 day of immersion (p < 0.001). At baseline and 7 day, the microhardness of Z250 was the greatest, followed by Z350 and P90 (p < 0.001). At 48 hr, the microhardness values of Z250 and Z350 were greater than P90 (p < 0.001 for both), but those of Z250 and Z350 were not significantly different (p = 0.095). Also, the effect of storage media on microhardness was not significant at baseline, but significant at 48 hr and after 7 day (p = 0.001 and p < 0.001, respectively). Lactic acid had the greatest effect.

Conclusions

The microhardness of composites decreased after 7 day of immersion. The microhardness of P90 was lower than that of other composites. Lactic acid caused a greater reduction in microhardness compared to other solutions.

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Chelating and antibacterial properties of chitosan nanoparticles on dentin
Aldo del Carpio-Perochena, Clovis Monteiro Bramante, Marco Antonio Hungaro Duarte, Marcia Regina de Moura, Fauze Ahmad Aouada, Anil Kishen
Restor Dent Endod 2015;40(3):195-201.   Published online March 30, 2015
DOI: https://doi.org/10.5395/rde.2015.40.3.195
AbstractAbstract PDFPubReaderePub
Objectives

The use of chitosan nanoparticles (CNPs) in endodontics is of interest due to their antibiofilm properties. This study was to investigate the ability of bioactive CNPs to remove the smear layer and inhibit bacterial recolonization on dentin.

Materials and Methods

One hundred bovine dentin sections were divided into five groups (n = 20 per group) according to the treatment. The irrigating solutions used were 2.5% sodium hypochlorite (NaOCl) for 20 min, 17% ethylenediaminetetraacetic acid (EDTA) for 3 min and 1.29 mg/mL CNPs for 3 min. The samples were irrigated with either distilled water (control), NaOCl, NaOCl-EDTA, NaOCl-EDTA-CNPs or NaOCl-CNPs. After the treatment, half of the samples (n = 50) were used to assess the chelating effect of the solutions using portable scanning electronic microscopy, while the other half (n = 50) were infected intra-orally to examine the post-treatment bacterial biofilm forming capacity. The biovolume and cellular viability of the biofilms were analysed under confocal laser scanning microscopy. The Kappa test was performed for examiner calibration, and the non-parametric Kruskal-Wallis and Dunn tests (p < 0.05) were used for comparisons among the groups.

Results

The smear layer was significantly reduced in all of the groups except the control and NaOCl groups (p < 0.05). The CNPs-treated samples were able to resist biofilm formation significantly better than other treatment groups (p < 0.05).

Conclusions

CNPs could be used as a final irrigant during root canal treatment with the dual benefit of removing the smear layer and inhibiting bacterial recolonization on root dentin.

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Synergistic effect of xylitol and ursolic acid combination on oral biofilms
Yunyun Zou, Yoon Lee, Jinyoung Huh, Jeong-Won Park
Restor Dent Endod 2014;39(4):288-295.   Published online August 27, 2014
DOI: https://doi.org/10.5395/rde.2014.39.4.288
AbstractAbstract PDFPubReaderePub
Objectives

This study was designed to evaluate the synergistic antibacterial effect of xylitol and ursolic acid (UA) against oral biofilms in vitro.

Materials and Methods

S. mutans UA 159 (wild type), S. mutans KCOM 1207, KCOM 1128 and S. sobrinus ATCC 33478 were used. The susceptibility of S. mutans to UA and xylitol was evaluated using a broth microdilution method. Based on the results, combined susceptibility was evaluated using optimal inhibitory combinations (OIC), optimal bactericidal combinations (OBC), and fractional inhibitory concentrations (FIC). The anti-biofilm activity of xylitol and UA on Streptococcus spp. was evaluated by growing cells in 24-well polystyrene microtiter plates for the biofilm assay. Significant mean differences among experimental groups were determined by Fisher's Least Significant Difference (p < 0.05).

Results

The synergistic interactions between xylitol and UA were observed against all tested strains, showing the FICs < 1. The combined treatment of xylitol and UA inhibited the biofilm formation significantly and also prevented pH decline to critical value of 5.5 effectively. The biofilm disassembly was substantially influenced by different age of biofilm when exposed to the combined treatment of xylitol and UA. Comparing to the single strain, relatively higher concentration of xylitol and UA was needed for inhibiting and disassembling biofilm formed by a mixed culture of S. mutans 159 and S. sobrinus 33478.

Conclusions

This study demonstrated that xylitol and UA, synergistic inhibitors, can be a potential agent for enhancing the antimicrobial and anti-biofilm efficacy against S. mutans and S. sobrinus in the oral environment.

Citations

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    Umesh Chand, Pramod Kumar Kushawaha
    Future Journal of Pharmaceutical Sciences.2025;[Epub]     CrossRef
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Inhibition of Streptococcus mutans biofilm formation on composite resins containing ursolic acid
Soohyeon Kim, Minju Song, Byoung-Duck Roh, Sung-Ho Park, Jeong-Won Park
Restor Dent Endod 2013;38(2):65-72.   Published online May 28, 2013
DOI: https://doi.org/10.5395/rde.2013.38.2.65
AbstractAbstract PDFPubReaderePub
Objectives

To evaluate the inhibitory effect of ursolic acid (UA)-containing composites on Streptococcus mutans (S. mutans) biofilm.

Materials and Methods

Composite resins with five different concentrations (0.04, 0.1, 0.2, 0.5, and 1.0 wt%) of UA (U6753, Sigma Aldrich) were prepared, and their flexural strengths were measured according to ISO 4049. To evaluate the effect of carbohydrate source on biofilm formation, either glucose or sucrose was used as a nutrient source, and to investigate the effect of saliva treatment, the specimen were treated with either unstimulated whole saliva or phosphate-buffered saline (PBS). For biofilm assay, composite disks were transferred to S. mutans suspension and incubated for 24 hr. Afterwards, the specimens were rinsed with PBS and sonicated. The colony forming units (CFU) of the disrupted biofilm cultures were enumerated. For growth inhibition test, the composites were placed on a polystyrene well cluster, and S. mutans suspension was inoculated. The optical density at 600 nm (OD600) was recorded by Infinite F200 pro apparatus (TECAN). One-way ANOVA and two-way ANOVA followed by Bonferroni correction were used for the data analyses.

Results

The flexural strength values did not show significant difference at any concentration (p > 0.01). In biofilm assay, the CFU score decreased as the concentration of UA increased. The influence of saliva pretreatment was conflicting. The sucrose groups exhibited higher CFU score than glucose group (p < 0.05). In bacterial growth inhibition test, all experimental groups containing UA resulted in complete inhibition.

Conclusions

Within the limitations of the experiments, UA included in the composite showed inhibitory effect on S. mutans biofilm formation and growth.

Citations

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Original Article
Reconsideration of treatment protocol on the reduction of Enterococcus faecalis associated with failed root canal treatment
Woo Cheol Lee, Seong-Tae Hong, WonJun Shon
J Korean Acad Conserv Dent 2008;33(6):560-569.   Published online November 30, 2008
DOI: https://doi.org/10.5395/JKACD.2008.33.6.560
AbstractAbstract PDFPubReaderePub

Microorganism survived in the root canal after root canal cleaning and shaping procedure is a main cause of root canal treatment failure. There are several mechanisms for the bacteria to survive in the root canal after chemomechanical preparation and root canal irrigation. Bacteria organized as biofilm has been suggested as an etiology of persistent periapical lesion. Recent studies were focus on removal of Enterococcus faecalis biofilm due to the report that the persistence of this bacteria after root canal treatment may be associated with its ability to form biofilm. Several investigations demonstrated that current root canal treatment protocol including use of NaOCl, EDTA and Chlorhexidine as irrigants is quite effective in eliminating E. faecalis biofilm. However, this microorganism still can survive in inaccessible areas of root canal system and evade host immune response, suppress immune activity and produce biofilm. Up to date, there is no possible clinical method to completely get rid of bacteria from the root canal. Once the root canal treatment failure occurred, and conventional treatment incorporating current therapeutic protocol has failed, periapical surgery or extraction should be considered rather than prolong the ineffected retreatment procedure.

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