scholarly journals Evaluation of Photodynamic Therapy Using a Diode Laser 635 nm as an Adjunct to Conventional Chemo-Mechanical Endodontic Procedures against Enterococcus faecalis Biofilm: Ex-Vivo Study

2020 ◽  
Vol 10 (8) ◽  
pp. 2925
Author(s):  
Gianluca Tenore ◽  
Gaspare Palaia ◽  
Guido Migliau ◽  
Ahmed Mohsen ◽  
Federica Rocchetti ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Diode Laser ◽  
Enterococcus Faecalis ◽  
Mechanical Treatment ◽  
Ex Vivo ◽  
Bacterial Load ◽  
Positive Control ◽  
Negative Control ◽  
Endodontic Treatment ◽  
Control Group

The study aimed to evaluate the antimicrobial effect of photodynamic therapy (PDT) with the use of Toluidine Blue (TB) on extracted teeth infected with biofilms of Enterococcus faecalis. Fifty-four extracted teeth with single-roots and single canals were mechanically shaped, autoclaved, and contaminated with E. faecalis. They were randomly divided into six groups: two groups were negative and positive control groups, two groups were subjected to mechanical instrumentation and PDT with different pre-irradiation times and irradiation times, and two groups were subjected to chemo-mechanical endodontic treatment and PDT with different pre-irradiation times and irradiation times. In PDT groups, after the application of TB, the canals were irradiated with a diode laser of wavelength 635 nm, with a fiber diameter of 200 μm and 100 mW of power in continuous mode. The bacterial load was evaluated using a BioTimer Assay protocol. The greatest reduction of bacterial load was observed in groups of combined PDT with chemo-mechanical treatment. The reductions of bacterial load in groups of combined PDT with chemo-mechanical treatment, and in the positive control group, were significant (p < 0.01) when compared to that of the negative control group. Photodynamic therapy as an adjunctive modality may improve the disinfection capacity of conventional endodontic treatment against E. faecalis.

scholarly journals Ex-vivo Effect of Intracanal Medications Based on Ozone and Calcium Hydroxide in Root Canals Contaminated with Enterococcus faecalis

2013 ◽  
Vol 24 (2) ◽  
pp. 103-106 ◽  
Author(s):  
Roberta Vieira Farac ◽  
Antonio Carlos Pizzolitto ◽  
Juliane Maria Guerreiro Tanomaru ◽  
Renata Dornelles Morgental ◽  
Regina Karla de Pontes Lima ◽  
...  
Keyword(s):  
Calcium Hydroxide ◽  
Enterococcus Faecalis ◽  
Ex Vivo ◽  
Negative Control Group ◽  
Positive Control ◽  
Negative Control ◽  
Control Group ◽  
Human Teeth ◽  
Root Canals ◽  
Colony Forming Units

This ex vivo study evaluated the antibacterial effect of intracanal medications in root canals contaminated with Enterococcus faecalis. Fifty single-rooted human teeth were contaminated with E. faecalis (ATCC 29212) and incubated at 37°C for 21 days. The specimens were randomly divided into 5 groups according to the intracanal medication used: OZ-PG: ozonized propylene glycol; CH/CPMC: calcium hydroxide/camphorated paramonochlorophenol; OZ-PG/CH ozonized PG/CH; PC: positive control group (no medication); and NC: negative control group (no contamination). The samples were collected after 7 days (post-medication) and 14 days (final). Bacterial growth was checked by counting the colony-forming units (CFU). OZ-PG and CH/CPMC reduced significantly the CFU counts compared with PC in the post-medication and final samples, with no statistically significant differences among them. On the other hand, OZ-PG/CH did not reduce significantly the number of bacteria compared with PC. In conclusion, among the evaluated medications OZ-PG and CH/CPMC were the most effective against E. faecalis.

scholarly journals NANO-ENGINEERED IRRIGATING SOLUTIONS AND LASERS – AN ANTIBACTERIAL STUDY AGAINST ENTEROCOCCUS FAECALIS

2019 ◽  
Vol 3 (12) ◽  
Author(s):  
Balagopal Sundaresan ◽  
Vandana James ◽  
Anisha Sebatni ◽  
Nazrin M ◽  
Bahavathi Ananthan Hemasathya ◽  
...  
Keyword(s):  
Diode Laser ◽  
Enterococcus Faecalis ◽  
Chitosan Nanoparticles ◽  
Negative Control Group ◽  
Positive Control ◽  
Negative Control ◽  
Control Group ◽  
Working Length ◽  
Group 5 ◽  
Group 2

BACKGROUND: Enterococcus faecalis (E. faecalis) is the most commonly detected micro-organism in asymptomatic and persistent endodontic infections. Thorough disinfection of the root canal is more important than proper shaping for a successful endodontic treatment. This study is an attempt to implement nanoparticles which have proven anti-bacterial efficacy as irrigating solutions against E. faecalis. AIM: To compare and evaluate the anti-bacterial efficacy of 5% sodium hypochlorite (NaOCl), 0.2% chitosan nanoparticles solution (ChNP) and 0.01% silver nanoparticles solution (AgNP) against E.faecalis with and without diode laser activation. MATERIALS AND METHODS: 70 single rooted mandibular premolars were included in this study. Access opening, working length determination and biomechanical preparation were standardized. Samples were embedded in putty material inside an eppendorf tube to simulate periodontal ligament and autoclaved followed by inoculation of  E.faecalis (MTCC 439) and incubated at 37℃ for 7 days. The samples were divided into 7 groups (10 samples in each group). Group 1- No treatment (Negative control), group 2 - 5% NaOCl without activation (Positive control), group 3 - 5% NaOCl with diode laser activation, group 4-  0.01% AgNP without activation, group 5- 0.01% AgNP with diode laser activation, group 6- 0.2% ChNP without activation and group 7- 0.2% ChNP with diode laser activation. A final rinse of the respective irrigants and activation were performed, followed by counting the colony forming units.  Statistical analysis used were one-way analysis of variance (ANOVA) followed by Tukey’s post-hoc tests. Results showed that diode laser in combination with 5% NaOCl and 0.2% ChNP had significant effects in the reduction of microbial colony counts of E. faecalis in comparison to other experimental groups.  Keywords: Nanoparticles, Irrigation, LASER, Enterococcus faecalis

scholarly journals The Effect of Antimicrobial Photodynamic Therapy Using Chlorophyllin–Phycocyanin Mixture on Enterococcus faecalis: The Influence of Different Light Sources

2020 ◽  
Vol 10 (12) ◽  
pp. 4290 ◽  
Author(s):  
Nasim Chiniforush ◽  
Maryam Pourhajibagher ◽  
Steven Parker ◽  
Stefano Benedicenti ◽  
Abbas Bahador ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Diode Laser ◽  
Enterococcus Faecalis ◽  
Control Group ◽  
Human Gingival Fibroblast ◽  
Light Sources ◽  
Gingival Fibroblast ◽  
Antimicrobial Photodynamic Therapy ◽  
Cell Viability Assay ◽  
Vitro Effect

The purpose of this study was to evaluate the in vitro effect of the chlorophyllin–phycocyanin mixture (Photoactive+) as a photosensitizer (PS) during antimicrobial photodynamic therapy (aPDT) on the count of Enterococcus faecalis (E. faecalis) using different light sources. The antimicrobial effect of aPDT with chlorophyllin–phycocyanin mixture using different light sources including diode laser (λ = 660 nm), diode laser (λ = 635 nm), LED (λ = 450 ± 30 nm) alone or in combination was assessed using microbial cell viability assay against E. faecalis. In addition, the cell cytotoxicity of Photoactive+ was assessed on human gingival fibroblast (HuGu) cells by MTT assay; E. faecalis growth when treated by both red wavelengths (635 nm, 660 nm) and combination of LED (420–480 nm) and red wavelengths (635 nm, 660 nm), significantly reduced compared to the control group (p < 0.05). There was no significant reduction in the number of viable cells exposed to Photoactive+ compared to the control group (p < 0.05). This study shows that the application of chlorophyllin–phycocyanin mixture and irradiation with emission of red light achieved a better result for bacterial count reduction, compared to a control. This component can be applied safely due to very negligible cytotoxicity.

scholarly journals IN VITRO EVALUATION OF ANTIMICROBIAL EFFICACY OF DIODE LASER WHEN USED ADJUNCTIVELY WITH SODIUM HYPOCHLORITE, METHYLENE BLUE OR TOLUIDINE BLUE IN ENTEROCOCCUS FAECALIS CONTAMINATED ROOT CANALS

2020 ◽  
pp. 148-151
Author(s):  
N. Shubhashini ◽  
Vinaya Kumar R ◽  
Annapoorna Kini ◽  
Swetha H.B. ◽  
Srikanth Choudhary B.S. ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Diode Laser ◽  
Enterococcus Faecalis ◽  
Sodium Hypochlorite ◽  
Toluidine Blue ◽  
Antimicrobial Effect ◽  
Positive Control ◽  
Negative Control ◽  
Root Canals

AIM: To evaluate antimicrobial effect of diode laser when used adjunctively with sodium hypochlorite, methylene blue or toluidine blue in Enterococcus faecalis inoculated root canals. METHODOLOGY: 70 extracted uniradicular premolars were prepared with ProTaper files and sterilized. 5 were kept aside as negative control (G1) and the remaining 65 were inoculated with Enterococcus faecalis and incubated for 7 days. Following this, 5 were kept as positive control (G2) and the other 60 were randomly distributed into six groups: G3, diode laser irradiation (1.5W) with sodium hypochlorite; G4, diode laser (3W) with sodium hypochlorite; G5, diode laser (1.5W) with methylene blue; G6, diode laser (3W) with methylene blue; G7, diode laser (1.5W) with toluidine blue; G8, diode laser (3W) with toluidine blue. Subsequently, turbidity was assessed and CFU count determined following intracanal sampling and plating. RESULTS: G4 exhibited significantly lower mean CFUs/mL (P˂0.001) among the experimental groups. G4 demonstrated the most (98.8%) while G7 exhibited the least antibacterial effect (28.66%). Highest turbidity was observed in G5 (0.1310) while the lowest was noted in G4 (0.0287). CONCLUSION: Diode laser used adjunctively with sodium hypochlorite exhibited superior antibacterial efficacy when compared to its use with photosensitizer dyes like methylene blue and toluidine blue.

scholarly journals Comparison of Antimicrobial Activity of Sodium Hypochlorite (NaOCI) 2.5%, Microemulsion of Myrtus 10%, Microemulsion of Thyme 0.6% on the Enterococcus Faecalis After Root Canal Filling

2021 ◽  
Vol 24 (3) ◽  
pp. 424-437
Author(s):  
Forough Khodadadnejad ◽  
◽  
Majid Akbari ◽  
Fateme Abdolalian ◽  
Mahboube Daneshvar ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Enterococcus Faecalis ◽  
Sodium Hypochlorite ◽  
Root Canal ◽  
Negative Control Group ◽  
Negative Control ◽  
Endodontic Treatment ◽  
Control Group ◽  
Root Canal Filling ◽  
Anterior Teeth

Background and Aim: The success of endodontic treatment depends on the complete elimination of pathogenic bacteria inside the root canal. Enterococcus faecalis, a gram-positive, pathogenic, and anaerobic cocci, are the primary etiology of root canal infection in treated and untreated teeth and are highly associated with endodontic treatment failure. This study aimed to compare the antimicrobial activity of Sodium hypochlorite 2.5%, microemulsion of Myrtus 10%, and microemulsion of Thyme 0.6% on the E. faecalis after root canal filling. Methods & Materials: In this experimental study, 25 extracted single canal human anterior teeth were collected, and their crowns were cut. Then after washing and cleaning, and filling, the sterilization was done using an autoclave. Then, except 5 teeth (negative control group), the teeth were smeared with E. faecalis and then divided into 5 groups randomly represented the irrigation by Sodium hypochlorite 2.5%, microemulsion of Myrtus 10%, and microemulsion of Thyme 0.6%, with a positive control group and negative control group. The teeth were filled with gutta-percha and then incubated in an incubator for 90 days at a temperature of 37°C. Finally, the comparison of CFU in the groups due to abnormal data distribution was performed using the Kruskal-Wallis test. Ethical Considerations: The Ethics Committee of Arak University of Medical Sciences approved this study (Code: IR.ARAKMU.REC.1398.297). Results: According to the results of this study, the correlation between the groups of cultured teeth was not significant(P>0.05). The specimens washed with microemulsion of the Thyme 0.6% had the highest positive number of cultures; the specimens washed by Sodium hypochlorite 2.5% had the lowest number of cultures. Conclusion: This study showed that no statistically significant difference exists in their antimicrobial activity after root canal therapy after the use of different wash solutions.

scholarly journals EKSPRESI TGF-B DAN MMP-1 PADA PERIODONTITIS APIKALIS KRONIS AKIBAT INDUKSI BAKTERI ENTEROCOCCUS FAECALIS TIKUS WISTAR

2019 ◽  
Vol 7 (2) ◽  
pp. 86
Author(s):  
Tamara Yuanita ◽  
Hadriany Hotmaria ◽  
Ruslan Effendy ◽  
Ketut Suardita
Keyword(s):  
Treatment Failure ◽  
Enterococcus Faecalis ◽  
Tissue Damage ◽  
Negative Control ◽  
Endodontic Treatment ◽  
Male Rats ◽  
Control Group ◽  
Control Group Design ◽  
Collagen Formation ◽  
Group B

Background. The main etiology of endodontic treatment failure  is caused by bacteries that stay in the root canal. E.faecalis is a bactery that is found as an etiology of endodontic treatment failure. Cell wall of this bacteria is containing Lipoteichoic acid (LTA). LTA can penetrate into the periradicular tissue, act as endotoxin in host and cause periradicular inflammation and destruction. It occurs due to the capability of TGF-ß to enhance the proliferation collagen and MMP-1 to stop the collagen formation. The ability of enterococcus faecalis in enhancing inflamation process cause host can not reach the homeostasis phase and performing an even bigger tissue damage. Purpose. The aim of this study is to know about the expression of of TGF-ß and MMP-1 during the periapical tissue damage due to induction of E.faecalis. Method. This study used laboratory experimental with the post test only control group design. A total of 27 male rats were randomly divided into 3 main groups. Group A (negative control) : every tooth was’nt induced by anything. Group B ( positive control): every tooth was induced only by sterile BHIb and closed by GIC Fuji II as the final restoration. Group C (: every tooth was induced by 10 μl BHI-b E.faecalis ATCC212(106 CFU), and closed by GIC Fuji II as the final restoration. The animals were sacrificed after 21 days and prepared for histological examination of tissue damage, then we did the immunohistochemistry  followed by calculation on the light microscope. Result. The analysis revealed that the expression of MMP-1 increased significantly in group C when E.faecalis was induced. When expression of TGF-ß decreaced significantly in group C rather than group B.  Conclusion. From this study we know that the expression of TGF-ß and MMP-1 are make opposite pathway due to chronic apical periodontitis that induced by E.faecalis.

scholarly journals Effectiveness of different endodontic irrigants against Enterococcus faecalis: an ex vivo study.

2018 ◽  
Vol 6 (5) ◽  
pp. 98
Author(s):  
Fabio Luis Miranda Pedro ◽  
Lenieser Fajardo Nunes ◽  
Thiago Machado Pereira ◽  
Kellin Pivatto ◽  
Cyntia Rodrigues de Araujo Estrela ◽  
...  
Keyword(s):  
Enterococcus Faecalis ◽  
Bacterial Contamination ◽  
Ex Vivo ◽  
Brain Heart Infusion ◽  
Positive Control ◽  
Negative Control ◽  
Peristaltic Pump ◽  
Constant Flow ◽  
Root Canals ◽  
Ex Vivo Study

Aim: To evaluate the effectiveness of different endodontic irrigants against Enterococcus faecalis (ATCC 29212).Methods: Seventy bovine mandibular incisors were prepared, inoculated with a bacterial strain for 60 days and divided into the following groups: positive control; negative control; 2.5% NaOCl; 17% EDTA; 0.2% chitosan; 2.5% NaOCl + 0.2% chitosan; and 2.5% NaOCl + 17% EDTA. The irrigation protocol was performed using an experimental peristaltic pump device, with the irrigating solutions circulating within the apparatus at a constant flow for 10 min. Paper-point samples were then collected from the root canals and immersed in 7 mL of brain heart infusion broth, followed by incubation at 37°C for 48 h. Bacterial growth was assessed by turbidity of the culture medium.Results: E. faecalis was present in all samples after the use of different irrigants.Conclusion: The different irrigants tested were not effective in completely eliminating dentin bacterial contamination with E. faecalis.

The Comparison of Ostecyte in the Pressure area and Tension area on Tooth Movement Because of Hyperbaric Oxygen Therapy

DENTA ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 34
Author(s):  
Arya Barahmanta ◽  
Muhammad Faizal Winaris ◽  
Pambudi Raharjo
Keyword(s):  
Hyperbaric Oxygen ◽  
Oxygen Therapy ◽  
Tooth Movement ◽  
Bone Remodelling ◽  
Orthodontic Tooth Movement ◽  
Negative Control Group ◽  
Positive Control ◽  
Negative Control ◽  
Control Group ◽  
Pressure Area

<p><strong><em>Background:</em></strong><em> Orthodontic tooth movement is a </em><em>interaction prosess</em><em> of resorption and deposition of bone remodeling. Orthodontic tooth movement by mechanical strength causes changes in alveolar bone. Osteocyte is an essential cell to respond bone remodelling. Hyperbaric Oxygen Therapy affects production of osteocyte because it can release Reactive Oxygen Species (ROS) and Nitrid Oxide (NO).  <strong>Purpose: </strong>To determine the difference number  of osteocyte in pressure and tension area during tooth movement by adjuvant of Hyperbaric Oxygen 2,4 ATA during 7 days starting on day 8 to day 14. <strong>Materials and Methods</strong>: This research used Completery Randomized Control Group Post Test Only Design. 36 cavia cobaya (male)  were divided into 3 groups randomly : the negative control groups, positive control group, and treatment group. Preparat staining used Hematoxylin Eosin (HE) and calculated on microscop 1000x with 20 field of view. Data analyses used one way ANOVA and LSD test then compared each area by using paired T test. <strong>Result:</strong> The data showed that the treatment group (P=10,67) tension area has the highest number of osteocyte than  negative control group (K-=3,67), positive control (K+=7,42). In the pressure area showed that negative control group (K-=5,00) has the highest  than positive control group (K+=3,83) and treatment (P=3,25). <strong>Conclusion: </strong>Therapy HBO 2,4 ATA 7 days starting on day 8 to day 14 is could increase osteocyte in the tissue to stimulate process of bone remodelling.</em></p><pre><strong> </strong></pre><p><strong><em>Keywords:</em></strong><em> Hyperbaric Oxygen, Tooth movement, Bone remodeling, </em><em>Osteocyte</em><em></em></p><p><em> </em></p><p><strong><em>Correspondence:</em></strong><em> </em><em>Arya Brahmanta</em><em>, Department of Orthodonty, Faculty of Dentistry, Hang Tuah University, Arif Rahman Hakim 150, Surabaya, Phone 031-5945864, Email:</em><em> </em><a href="mailto:[email protected]"><em>arya.brahmanta</em><em>@</em><em>hangtuah.ac.id</em></a></p>

In vitro and in vivo Assessment of Silver Nanoparticles Against Clostridium botulinum Type A Botulinum

2019 ◽  
Vol 16 (1) ◽  
pp. 113-119 ◽  
Author(s):  
Mohammad Aminianfar ◽  
Siavash Parvardeh ◽  
Mohsen Soleimani
Keyword(s):  
Silver Nanoparticles ◽  
Botulinum Toxin ◽  
Clostridium Botulinum ◽  
Lethal Dose ◽  
Type A ◽  
Positive Control ◽  
Negative Control ◽  
Laboratory Animals ◽  
Control Group ◽  
Nano Silver

Background: Clostridium botulinum causes botulism, a serious paralytic illness that results from the ingestion of a botulinum toxin. Because silver nanoparticle products exhibit strong antimicrobial activity, applications for silver nanoparticles in healthcare have expanded. Therefore, the objective of the current study was to assess a therapeutic strategy for the treatment of botulism toxicity using silver nanoparticles. Methods: A preliminary test was conducted using doses that produce illness in laboratory animals to determine the absolute lethal dose (LD100) of botulinum toxin type A (BoNT/A) in mice. Next, the test animals were divided into six groups containing six mice each. Groups I, II and III were the negative control (botulinum toxin only), positive control-1 (nano-silver only) and positive control-2 (no treatment), respectively. The remaining groups were allocated to the toxin that was supplemented with three nano-silver treatments. Results: The mortality rates of mice caused by BoNT/A significantly reduced in the treatment groups with different doses and injection intervals of nano-silver when compared to the negative control group. BoNT/A toxicity induced by intraperitoneal injection of the toxin of Clostridium botulinum causes rapid death while when coupled with nano-osilver results in delayed death in mice. Conclusion: These results, while open to future improvement, represent a preliminary step towards the satisfactory control of BoNT/A with the use of silver nanoparticles for human protection against this bioterrorism threat. Further study in this area can elucidate the underlying mechanism for detoxifying BoNT/A by silver nanoparticles.

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